import React, { useState, useEffect, useCallback } from 'react'
import { useNavigate, useParams, Link } from 'react-router-dom'
import {
  FaSave,
  FaTimes,
  FaArrowLeft,
  FaFolder,
  FaBullseye,
  FaFlag,
  FaTasks,
  FaFileAlt,
  FaExclamationCircle,
  FaChartLine,
  FaPlus,
  FaEdit,
  FaTrash,
  FaBuilding,
  FaPhone,
  FaEnvelope,
  FaClock,
  FaUser,
  FaDollarSign,
  FaEye,
  FaDownload,
} from 'react-icons/fa'
import LoadingSpinner from '../../../components/common/LoadingSpinner'
import { mockEmployees } from '../../../mocks/mockEmployees'
import { mockBusinessParties } from '../../../mocks/mockBusinessParties'
import {
  PsProject,
  ProjectStatusEnum,
  ProjectTypeEnum,
  PsProjectPhase,
  PsProjectTask,
  PsProjectRisk,
  PsProjectDocument,
  TaskStatusEnum,
  PsDocumentTypeEnum,
  RiskCategoryEnum,
  RiskProbabilityEnum,
  RiskImpactEnum,
  RiskLevelEnum,
  RiskStatusEnum,
} from '../../../types/ps'
import { mockProjects } from '../../../mocks/mockProjects'
import { mockProjectPhases } from '../../../mocks/mockProjectPhases'
import { mockProjectTasks } from '../../../mocks/mockProjectTasks'
import dayjs from 'dayjs'
import classNames from 'classnames'
import PhaseEditModal from './PhaseEditModal'
import TaskModal, { TaskFormData } from './TaskEditModal'
import DocumentUploadModal from './DocumentUploadModal'
import DocumentViewerModal from './DocumentViewerModal'
import RiskModal from './RiskModal'
import { BusinessParty, PriorityEnum } from '../../../types/common'
import {
  getProjectStatusColor,
  getProjectStatusIcon,
  getProjectStatusText,
  getProgressColor,
  getPriorityColor,
  getPriorityText,
  getProjectTypeColor,
  getProjectTypeText,
} from '../../../utils/erp'
import { Container } from '@/components/shared'
import { ROUTES_ENUM } from '@/routes/route.constant'
import { mockCurrencies } from '@/mocks/mockCurrencies'
import { EmployeeDto } from '@/proxy/intranet/models'

// Custom styles for the slider
const sliderStyles = `
  input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 8px;
    border-radius: 4px;
    outline: none;
  }
  
  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #3b82f6;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
  }
  
  input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #3b82f6;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
  }
`

interface ValidationErrors {
  [key: string]: string
}

const ProjectForm: React.FC = () => {
  const navigate = useNavigate()
  const { id } = useParams<{ id: string }>()
  const isEdit = Boolean(id)

  const [loading, setLoading] = useState(false)
  const [saving, setSaving] = useState(false)
  const [errors, setErrors] = useState<ValidationErrors>({})
  const [customers, setCustomers] = useState<BusinessParty[]>([])
  const [projectManagers, setProjectManagers] = useState<EmployeeDto[]>([])
  const [activeTab, setActiveTab] = useState('overview')

  // Additional states for the new features
  const [phases, setPhases] = useState<PsProjectPhase[]>([])
  const [tasks, setTasks] = useState<PsProjectTask[]>([])
  const [risks, setRisks] = useState<PsProjectRisk[]>([])
  const [documents, setDocuments] = useState<PsProjectDocument[]>([])

  // Modal states
  const [isPhaseModalOpen, setIsPhaseModalOpen] = useState(false)
  const [editingPhase, setEditingPhase] = useState<PsProjectPhase | null>(null)
  const [isTaskModalOpen, setIsTaskModalOpen] = useState(false)
  const [editingTask, setEditingTask] = useState<PsProjectTask | null>(null)

  // Document modal states
  const [isDocumentUploadModalOpen, setIsDocumentUploadModalOpen] = useState(false)
  const [isDocumentViewerModalOpen, setIsDocumentViewerModalOpen] = useState(false)
  const [selectedDocument, setSelectedDocument] = useState<PsProjectDocument | null>(null)

  // Risk modal states
  const [isRiskModalOpen, setIsRiskModalOpen] = useState(false)
  const [editingRisk, setEditingRisk] = useState<PsProjectRisk | null>(null)

  const [formData, setFormData] = useState<PsProject>({
    id: '',
    code: '',
    name: '',
    description: '',
    projectType: ProjectTypeEnum.Internal,
    status: ProjectStatusEnum.Planning,
    priority: PriorityEnum.Low,
    customerId: '',
    customer: undefined,
    projectManagerId: '',
    projectManager: undefined,
    startDate: new Date(),
    endDate: new Date(),
    actualStartDate: undefined,
    actualEndDate: undefined,
    budget: 0,
    actualCost: 0,
    currency: 'TRY',
    progress: 0,
    phases: [],
    tasks: [],
    risks: [],
    documents: [],
    isActive: true,
    creationTime: new Date(),
    lastModificationTime: new Date(),
  })

  const tabs = [
    { id: 'overview', name: 'Genel Bakış', icon: FaChartLine },
    { id: 'phases', name: 'Aşamalar', icon: FaFlag },
    { id: 'tasks', name: 'Görevler', icon: FaTasks },
    { id: 'documents', name: 'Belgeler', icon: FaFileAlt },
    { id: 'risks', name: 'Riskler', icon: FaExclamationCircle },
    { id: 'budget', name: 'Bütçe Bilgileri', icon: FaDollarSign },
  ]

  const budgetUsagePercentage =
    formData.budget > 0 ? (formData.actualCost / formData.budget) * 100 : 0

  const loadData = useCallback(async () => {
    try {
      setCustomers(mockBusinessParties)
      setProjectManagers(mockEmployees)

      if (isEdit && id) {
        // Load existing phases, tasks, risks, documents for the project
        const existingPhases = mockProjectPhases.filter((p) => p.projectId === id)
        const existingTasks = mockProjectTasks.filter((t) => t.projectId === id)
        setPhases(existingPhases)
        setTasks(existingTasks)
        // For now, using empty arrays for risks and documents
        setRisks([])
        setDocuments([])
      }
    } catch (error) {
      console.error('Error loading data:', error)
    }
  }, [isEdit, id])

  const loadFormData = useCallback(async () => {
    setLoading(true)
    try {
      if (isEdit && id) {
        await new Promise((resolve) => setTimeout(resolve, 1000))
        const mockProject = mockProjects.find((p) => p.id === id)
        if (mockProject) {
          setFormData(mockProject)
        }
      }
    } catch (error) {
      console.error('Error loading form data:', error)
    } finally {
      setLoading(false)
    }
  }, [isEdit, id])

  useEffect(() => {
    loadData()
    loadFormData()
  }, [loadData, loadFormData])

  // Add custom slider styles
  useEffect(() => {
    const style = document.createElement('style')
    style.textContent = sliderStyles
    document.head.appendChild(style)

    return () => {
      document.head.removeChild(style)
    }
  }, [])

  const validateForm = (): boolean => {
    const newErrors: ValidationErrors = {}

    if (!formData.code.trim()) {
      newErrors.projectCode = 'Proje kodu zorunludur'
    }
    if (!formData.name.trim()) {
      newErrors.name = 'Proje adı zorunludur'
    }
    if (!formData.projectType) {
      newErrors.projectType = 'Proje tipi seçilmelidir'
    }
    if (!formData.projectManagerId) {
      newErrors.projectManagerId = 'Proje yöneticisi seçilmelidir'
    }
    if (!formData.startDate) {
      newErrors.startDate = 'Başlangıç tarihi zorunludur'
    }
    if (!formData.endDate) {
      newErrors.endDate = 'Bitiş tarihi zorunludur'
    }
    if (formData.startDate && formData.endDate && formData.startDate >= formData.endDate) {
      newErrors.endDate = 'Bitiş tarihi başlangıç tarihinden sonra olmalıdır'
    }
    if (formData.budget <= 0) {
      newErrors.budget = "Bütçe 0'dan büyük olmalıdır"
    }

    setErrors(newErrors)
    return Object.keys(newErrors).length === 0
  }

  const handleInputChange = (field: keyof PsProject, value: string | number | boolean | Date) => {
    setFormData((prev) => ({
      ...prev,
      [field]: value,
    }))

    if (errors[field]) {
      setErrors((prev) => ({
        ...prev,
        [field]: '',
      }))
    }
  }

  const handleDateChange = (field: keyof PsProject, value: string) => {
    const date = value ? new Date(value) : new Date()
    handleInputChange(field, date)
  }

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault()

    if (!validateForm()) {
      return
    }

    setSaving(true)
    try {
      await new Promise((resolve) => setTimeout(resolve, 2000))

      console.log('Project data:', {
        ...formData,
        id: isEdit ? id : undefined,
      })

      alert(isEdit ? 'Proje başarıyla güncellendi!' : 'Proje başarıyla oluşturuldu!')

      navigate(ROUTES_ENUM.protected.projects.list)
    } catch (error) {
      console.error('Error saving project:', error)
      alert('Bir hata oluştu. Lütfen tekrar deneyin.')
    } finally {
      setSaving(false)
    }
  }

  const handleCancel = () => {
    navigate(ROUTES_ENUM.protected.projects.list)
  }

  // Phase modal handlers
  const openPhaseModal = () => {
    setEditingPhase(null)
    setIsPhaseModalOpen(true)
  }

  const openEditPhaseModal = (phase: PsProjectPhase) => {
    setEditingPhase(phase)
    setIsPhaseModalOpen(true)
  }

  const closePhaseModal = () => {
    setIsPhaseModalOpen(false)
    setEditingPhase(null)
  }

  const handlePhaseSubmit = (phaseData: PsProjectPhase) => {
    if (editingPhase) {
      // Edit existing phase
      const updatedPhases = phases.map((p) =>
        p.id === editingPhase.id
          ? {
              ...editingPhase,
              name: phaseData.name,
              description: phaseData.description,
              projectId: phaseData.projectId,
              status: phaseData.status,
              startDate: new Date(phaseData.startDate),
              endDate: new Date(phaseData.endDate),
              budget: phaseData.budget,
              category: phaseData.category,
              assignedTeams: phaseData.assignedTeams,
              updatedAt: new Date(),
            }
          : p,
      )
      setPhases(updatedPhases)
      alert('Aşama başarıyla güncellendi!')
    } else {
      // Create new phase
      const selectedProject = mockProjects.find((p) => p.id === phaseData.projectId)
      if (!selectedProject) {
        alert('Proje bulunamadı!')
        return
      }

      const newPhase: PsProjectPhase = {
        id: Date.now().toString(),
        code: `PH-${(phases.length + 1).toString().padStart(3, '0')}`,
        name: phaseData.name,
        description: phaseData.description,
        projectId: phaseData.projectId,
        project: selectedProject,
        status: phaseData.status,
        startDate: new Date(phaseData.startDate),
        endDate: new Date(phaseData.endDate),
        budget: phaseData.budget,
        actualCost: 0,
        progress: 0,
        category: phaseData.category,
        assignedTeams: phaseData.assignedTeams,
        deliverables: [],
        risks: [],
        milestones: 0,
        completedMilestones: 0,
        sequence: phases.length + 1,
        tasks: [],
        isActive: true,
      }
      setPhases([...phases, newPhase])
      alert('Yeni aşama başarıyla oluşturuldu!')
    }
    closePhaseModal()
  }

  const handleDeletePhase = (phaseId: string) => {
    if (window.confirm('Bu aşamayı silmek istediğinizden emin misiniz?')) {
      setPhases(phases.filter((p) => p.id !== phaseId))
      alert('Aşama başarıyla silindi!')
    }
  }

  // Task handlers
  const openTaskModal = () => {
    setEditingTask(null)
    setIsTaskModalOpen(true)
  }

  const openEditTaskModal = (task: PsProjectTask) => {
    setEditingTask(task)
    setIsTaskModalOpen(true)
  }

  const closeTaskModal = () => {
    setIsTaskModalOpen(false)
    setEditingTask(null)
  }

  const handleTaskSubmit = (taskData: TaskFormData) => {
    if (editingTask) {
      // Edit existing task
      const updatedTasks = tasks.map((t) =>
        t.id === editingTask.id
          ? {
              ...editingTask,
              name: taskData.name,
              description: taskData.description,
              projectId: taskData.projectId,
              phaseId: taskData.phaseId,
              taskType: taskData.taskType,
              status: taskData.status,
              priority: taskData.priority,
              assignedTo: taskData.assignedTo,
              assignee: mockEmployees.find((emp) => emp.id === taskData.assignedTo),
              startDate: new Date(taskData.startDate),
              endDate: new Date(taskData.endDate),
              estimatedHours: taskData.estimatedHours,
              progress: taskData.progress,
              lastModificationTime: new Date(),
            }
          : t,
      )
      setTasks(updatedTasks)
      alert('Görev başarıyla güncellendi!')
    } else {
      // Create new task
      const selectedProject = mockProjects.find((p) => p.id === taskData.projectId)
      const selectedPhase = mockProjectPhases.find((p) => p.id === taskData.phaseId)
      const selectedAssignee = mockEmployees.find((emp) => emp.id === taskData.assignedTo)

      if (!selectedProject) {
        alert('Proje bulunamadı!')
        return
      }

      const newTask: PsProjectTask = {
        id: Date.now().toString(),
        projectId: taskData.projectId,
        phaseId: taskData.phaseId,
        phase: selectedPhase,
        taskCode: `TSK-${(tasks.length + 1).toString().padStart(3, '0')}`,
        name: taskData.name,
        description: taskData.description,
        taskType: taskData.taskType,
        status: taskData.status,
        priority: taskData.priority,
        assignedTo: taskData.assignedTo,
        assignee: selectedAssignee,
        startDate: new Date(taskData.startDate),
        endDate: new Date(taskData.endDate),
        estimatedHours: taskData.estimatedHours,
        actualHours: 0,
        progress: 0,
        activities: [],
        comments: [],
        isActive: true,
        creationTime: new Date(),
        lastModificationTime: new Date(),
      }
      setTasks([...tasks, newTask])
      alert('Yeni görev başarıyla oluşturuldu!')
    }
    closeTaskModal()
  }

  const handleDeleteTask = (taskId: string) => {
    if (window.confirm('Bu görevi silmek istediğinizden emin misiniz?')) {
      setTasks(tasks.filter((t) => t.id !== taskId))
      alert('Görev başarıyla silindi!')
    }
  }

  // Document handlers
  const openDocumentUploadModal = () => {
    setIsDocumentUploadModalOpen(true)
  }

  const closeDocumentUploadModal = () => {
    setIsDocumentUploadModalOpen(false)
  }

  const handleDocumentUpload = (documentData: {
    documentName: string
    documentType: PsDocumentTypeEnum
    file: File
  }) => {
    // In a real application, you would upload the file to a server
    // For now, we'll create a mock URL and add it to the documents list
    const newDocument: PsProjectDocument = {
      id: Date.now().toString(),
      projectId: formData.id || 'temp-project-id',
      documentName: documentData.documentName,
      documentType: documentData.documentType,
      filePath: URL.createObjectURL(documentData.file), // Mock file path
      fileSize: Number((documentData.file.size / (1024 * 1024)).toFixed(2)), // Convert to MB
      uploadedBy: 'Current User', // In real app, get from auth context
      uploadedAt: new Date(),
      version: '1.0',
      isActive: true,
    }

    setDocuments([...documents, newDocument])
    closeDocumentUploadModal()
    alert('Belge başarıyla yüklendi!')
  }

  const openDocumentViewer = (document: PsProjectDocument) => {
    setSelectedDocument(document)
    setIsDocumentViewerModalOpen(true)
  }

  const closeDocumentViewer = () => {
    setIsDocumentViewerModalOpen(false)
    setSelectedDocument(null)
  }

  const handleDocumentDownload = (document: PsProjectDocument) => {
    // In a real application, this would trigger a server download
    const link = window.document.createElement('a')
    link.href = document.filePath
    link.download = document.documentName
    link.click()
  }

  const handleDeleteDocument = (documentId: string) => {
    if (window.confirm('Bu belgeyi silmek istediğinizden emin misiniz?')) {
      setDocuments(documents.filter((d) => d.id !== documentId))
      alert('Belge başarıyla silindi!')
    }
  }

  // Risk handlers
  const openRiskModal = () => {
    setEditingRisk(null)
    setIsRiskModalOpen(true)
  }

  const openEditRiskModal = (risk: PsProjectRisk) => {
    setEditingRisk(risk)
    setIsRiskModalOpen(true)
  }

  const closeRiskModal = () => {
    setIsRiskModalOpen(false)
    setEditingRisk(null)
  }

  const handleRiskSubmit = (riskData: Partial<PsProjectRisk>) => {
    if (editingRisk) {
      // Edit existing risk
      const updatedRisks = risks.map((r) =>
        r.id === editingRisk.id
          ? {
              ...editingRisk,
              ...riskData,
            }
          : r,
      )
      setRisks(updatedRisks)
      alert('Risk başarıyla güncellendi!')
    } else {
      // Create new risk
      const newRisk: PsProjectRisk = {
        id: Date.now().toString(),
        projectId: formData.id || 'temp-project-id',
        riskCode: `RISK-${(risks.length + 1).toString().padStart(3, '0')}`,
        title: riskData.title || '',
        description: riskData.description || '',
        category: riskData.category || RiskCategoryEnum.Technical,
        probability: riskData.probability || RiskProbabilityEnum.Medium,
        impact: riskData.impact || RiskImpactEnum.Medium,
        riskLevel: riskData.riskLevel || RiskLevelEnum.Medium,
        status: riskData.status || RiskStatusEnum.Identified,
        identifiedBy: 'Current User', // In real app, get from auth context
        identifiedDate: new Date(),
        mitigationPlan: riskData.mitigationPlan,
        contingencyPlan: riskData.contingencyPlan,
        ownerId: riskData.ownerId,
        reviewDate: riskData.reviewDate,
        isActive: true,
      }
      setRisks([...risks, newRisk])
      alert('Yeni risk başarıyla eklendi!')
    }
    closeRiskModal()
  }

  const handleDeleteRisk = (riskId: string) => {
    if (window.confirm('Bu riski silmek istediğinizden emin misiniz?')) {
      setRisks(risks.filter((r) => r.id !== riskId))
      alert('Risk başarıyla silindi!')
    }
  }

  if (loading) {
    return <LoadingSpinner />
  }

  return (
    <Container>
      <div className="space-y-2">
        {/* Header */}
        <div className="bg-white border-b border-gray-200">
          <div className="p-2">
            <div className="flex items-center justify-between h-12">
              <div className="flex items-center">
                <Link
                  to={ROUTES_ENUM.protected.projects.list}
                  className="flex items-center px-2.5 py-1.5 text-gray-600 hover:text-gray-900 hover:bg-gray-100 rounded-lg transition-colors mr-2"
                >
                  <FaArrowLeft className="w-4 h-4 mr-2" />
                  Geri
                </Link>
                <div className="flex items-center space-x-2">
                  <div className="w-10 h-10 bg-blue-100 rounded-xl flex items-center justify-center">
                    <FaFolder className="w-6 h-6 text-blue-600" />
                  </div>
                  <div>
                    <h2 className="text-2xl font-bold text-gray-900">
                      {isEdit ? formData.code : 'Yeni Proje'}
                    </h2>
                    <p className="text-gray-600">
                      {isEdit ? formData.name : 'Proje bilgilerini girin'}
                    </p>
                  </div>
                </div>
              </div>
              <div className="flex items-center space-x-2">
                {isEdit && (
                  <span
                    className={classNames(
                      'inline-flex items-center px-2.5 py-1 rounded-full text-sm font-medium border',
                      getProjectStatusColor(formData.status),
                    )}
                  >
                    {getProjectStatusIcon(formData.status)}
                    <span className="ml-2">{getProjectStatusText(formData.status)}</span>
                  </span>
                )}
              </div>
            </div>
          </div>
        </div>

        <div className="mx-auto py-2">
          {/* Summary Cards - Only show in edit mode */}
          {isEdit && (
            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-3 mb-4">
              {/* Progress Card */}
              <div className="bg-white rounded-xl shadow-sm border border-gray-200 p-3">
                <div className="flex items-center justify-between mb-2">
                  <div className="w-7 h-7 bg-blue-100 rounded-lg flex items-center justify-center">
                    <FaBullseye className="w-5 h-5 text-blue-600" />
                  </div>
                  <span className="text-lg font-bold text-blue-600">{formData.progress}%</span>
                </div>
                <h3 className="text-sm font-medium text-gray-600 mb-1">İlerleme</h3>
                <div className="w-full bg-gray-200 rounded-full h-2">
                  <div
                    className={classNames('h-2 rounded-full', getProgressColor(formData.progress))}
                    style={{ width: `${formData.progress}%` }}
                  />
                </div>
              </div>

              {/* Budget Card */}
              <div className="bg-white rounded-xl shadow-sm border border-gray-200 p-3">
                <div className="flex items-center justify-between mb-2">
                  <div className="w-7 h-7 bg-green-100 rounded-lg flex items-center justify-center">
                    <FaDollarSign className="w-5 h-5 text-green-600" />
                  </div>
                  <span className="text-lg font-bold text-green-600">
                    {budgetUsagePercentage.toFixed(0)}%
                  </span>
                </div>
                <h3 className="text-sm font-medium text-gray-600 mb-1">Bütçe Kullanımı</h3>
                <div className="text-xs text-gray-500">
                  ₺{formData.actualCost.toLocaleString()} / ₺{formData.budget.toLocaleString()}
                </div>
              </div>

              {/* Duration Card */}
              <div className="bg-white rounded-xl shadow-sm border border-gray-200 p-3">
                <div className="flex items-center justify-between mb-2">
                  <div className="w-7 h-7 bg-orange-100 rounded-lg flex items-center justify-center">
                    <FaClock className="w-5 h-5 text-orange-600" />
                  </div>
                  <span className="text-lg font-bold text-orange-600">
                    {dayjs(formData.endDate).diff(dayjs(formData.startDate), 'day')}
                  </span>
                </div>
                <h3 className="text-sm font-medium text-gray-600 mb-1">Süre (Gün)</h3>
                <div className="text-xs text-gray-500">
                  {dayjs(formData.startDate).format('DD.MM.YYYY')} -{' '}
                  {dayjs(formData.endDate).format('DD.MM.YYYY')}
                </div>
              </div>

              {/* Priority Card */}
              <div className="bg-white rounded-xl shadow-sm border border-gray-200 p-3">
                <div className="flex items-center justify-between mb-2">
                  <div className="w-7 h-7 bg-red-100 rounded-lg flex items-center justify-center">
                    <FaFlag className="w-5 h-5 text-red-600" />
                  </div>
                  <span
                    className={classNames('text-lg font-bold', getPriorityColor(formData.priority))}
                  >
                    {getPriorityText(formData.priority)}
                  </span>
                </div>
                <h3 className="text-sm font-medium text-gray-600 mb-1">Öncelik</h3>
                <span
                  className={classNames(
                    'inline-flex items-center px-2 py-1 rounded-full text-xs font-medium border',
                    getProjectTypeColor(formData.projectType),
                  )}
                >
                  {getProjectTypeText(formData.projectType)}
                </span>
              </div>
            </div>
          )}

          {/* Tabs */}
          <div className="bg-white rounded-xl shadow-sm border border-gray-200 overflow-hidden">
            <div className="border-b border-gray-200">
              <nav className="flex space-x-2 px-3" aria-label="Tabs">
                {tabs.map((tab) => {
                  const Icon = tab.icon
                  return (
                    <button
                      key={tab.id}
                      onClick={() => setActiveTab(tab.id)}
                      className={classNames(
                        'py-2 px-1 border-b-2 font-medium text-sm flex items-center space-x-2 transition-colors',
                        activeTab === tab.id
                          ? 'border-blue-500 text-blue-600'
                          : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300',
                      )}
                    >
                      <Icon className="w-4 h-4" />
                      <span>{tab.name}</span>
                    </button>
                  )
                })}
              </nav>
            </div>

            {/* Tab Content */}
            <div className="p-3">
              {activeTab === 'overview' && (
                <div className="space-y-3">
                  {/* Project Info Grid */}
                  <div className="grid grid-cols-1 lg:grid-cols-2 gap-3">
                    {/* Project Details */}
                    <div className="space-y-3">
                      <div>
                        <h3 className="text-base font-semibold text-gray-900 mb-2">
                          Proje Detayları
                        </h3>
                        <div className="bg-gray-50 rounded-lg p-2.5 space-y-2.5">
                          <div className="grid grid-cols-1 md:grid-cols-2 gap-2.5">
                            <div>
                              <label className="block text-sm font-medium text-gray-700 mb-1">
                                Proje Kodu *
                              </label>
                              <input
                                autoFocus
                                type="text"
                                value={formData.code}
                                onChange={(e) => handleInputChange('code', e.target.value)}
                                className={`block w-full px-2.5 py-1.5 text-sm border rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${
                                  errors.code
                                    ? 'border-red-300 focus:border-red-500'
                                    : 'border-gray-300 focus:border-blue-500'
                                }`}
                                placeholder="Örn: PRJ001"
                              />
                              {errors.projectCode && (
                                <p className="mt-1 text-sm text-red-600">{errors.projectCode}</p>
                              )}
                            </div>

                            <div>
                              <label className="block text-sm font-medium text-gray-700 mb-1">
                                Proje Tipi *
                              </label>
                              <select
                                value={formData.projectType}
                                onChange={(e) => handleInputChange('projectType', e.target.value)}
                                className={`block w-full px-2.5 py-1.5 text-sm border rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${
                                  errors.projectType
                                    ? 'border-red-300 focus:border-red-500'
                                    : 'border-gray-300 focus:border-blue-500'
                                }`}
                              >
                                <option value="">Tip seçin</option>
                                {Object.values(ProjectTypeEnum).map((type) => (
                                  <option key={type} value={type}>
                                    {getProjectTypeText(type)}
                                  </option>
                                ))}
                              </select>
                              {errors.projectType && (
                                <p className="mt-1 text-sm text-red-600">{errors.projectType}</p>
                              )}
                            </div>
                          </div>

                          <div>
                            <label className="block text-sm font-medium text-gray-700 mb-1">
                              Proje Adı *
                            </label>
                            <input
                              type="text"
                              value={formData.name}
                              onChange={(e) => handleInputChange('name', e.target.value)}
                              className={`block w-full px-2.5 py-1.5 text-sm border rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${
                                errors.name
                                  ? 'border-red-300 focus:border-red-500'
                                  : 'border-gray-300 focus:border-blue-500'
                              }`}
                              placeholder="Proje adı"
                            />
                            {errors.name && (
                              <p className="mt-1 text-sm text-red-600">{errors.name}</p>
                            )}
                          </div>

                          <div className="grid grid-cols-1 md:grid-cols-3 gap-2.5">
                            <div>
                              <label className="block text-sm font-medium text-gray-700 mb-1">
                                Durum
                              </label>
                              <select
                                value={formData.status}
                                onChange={(e) => handleInputChange('status', e.target.value)}
                                className="block w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                              >
                                {Object.values(ProjectStatusEnum).map((status) => (
                                  <option key={status} value={status}>
                                    {getProjectStatusText(status)}
                                  </option>
                                ))}
                              </select>
                            </div>

                            <div>
                              <label className="block text-sm font-medium text-gray-700 mb-1">
                                Öncelik
                              </label>
                              <select
                                value={formData.priority}
                                onChange={(e) => handleInputChange('priority', e.target.value)}
                                className="block w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                              >
                                {Object.values(PriorityEnum).map((priority) => (
                                  <option key={priority} value={priority}>
                                    {priority}
                                  </option>
                                ))}
                              </select>
                            </div>

                            <div>
                              <label className="block text-sm font-medium text-gray-700 mb-1">
                                Para Birimi
                              </label>
                              <select
                                value={formData.currency}
                                onChange={(e) => handleInputChange('currency', e.target.value)}
                                className="block w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                              >
                                {mockCurrencies.map((currency) => (
                                  <option key={currency.value} value={currency.value}>
                                    {currency.value} - {currency.label}
                                  </option>
                                ))}
                              </select>
                            </div>
                          </div>

                          <div>
                            <label className="block text-sm font-medium text-gray-700 mb-1">
                              Açıklama
                            </label>
                            <textarea
                              value={formData.description}
                              onChange={(e) => handleInputChange('description', e.target.value)}
                              rows={3}
                              className="block w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                              placeholder="Proje açıklaması"
                            />
                          </div>
                        </div>
                      </div>

                      {/* Timeline */}
                      <div>
                        <h3 className="text-base font-semibold text-gray-900 mb-2">
                          Zaman Çizelgesi
                        </h3>
                        <div className="bg-gray-50 rounded-lg p-2.5 space-y-2.5">
                          <div className="grid grid-cols-1 md:grid-cols-2 gap-2.5">
                            <div>
                              <label className="block text-sm font-medium text-gray-700 mb-1">
                                Başlangıç Tarihi *
                              </label>
                              <input
                                type="date"
                                value={dayjs(formData.startDate).format('YYYY-MM-DD')}
                                onChange={(e) => handleDateChange('startDate', e.target.value)}
                                className={`block w-full px-2.5 py-1.5 text-sm border rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${
                                  errors.startDate
                                    ? 'border-red-300 focus:border-red-500'
                                    : 'border-gray-300 focus:border-blue-500'
                                }`}
                              />
                              {errors.startDate && (
                                <p className="mt-1 text-sm text-red-600">{errors.startDate}</p>
                              )}
                            </div>

                            <div>
                              <label className="block text-sm font-medium text-gray-700 mb-1">
                                Bitiş Tarihi *
                              </label>
                              <input
                                type="date"
                                value={dayjs(formData.endDate).format('YYYY-MM-DD')}
                                onChange={(e) => handleDateChange('endDate', e.target.value)}
                                className={`block w-full px-2.5 py-1.5 text-sm border rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${
                                  errors.endDate
                                    ? 'border-red-300 focus:border-red-500'
                                    : 'border-gray-300 focus:border-blue-500'
                                }`}
                              />
                              {errors.endDate && (
                                <p className="mt-1 text-sm text-red-600">{errors.endDate}</p>
                              )}
                            </div>
                          </div>

                          {isEdit && (
                            <div className="grid grid-cols-1 md:grid-cols-2 gap-2.5">
                              <div>
                                <label className="block text-sm font-medium text-gray-700 mb-1">
                                  Gerçek Başlangıç Tarihi
                                </label>
                                <input
                                  type="date"
                                  value={
                                    formData.actualStartDate
                                      ? dayjs(formData.actualStartDate).format('YYYY-MM-DD')
                                      : ''
                                  }
                                  onChange={(e) =>
                                    handleDateChange('actualStartDate', e.target.value)
                                  }
                                  className="block w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                                />
                              </div>

                              <div>
                                <label className="block text-sm font-medium text-gray-700 mb-1">
                                  Gerçek Bitiş Tarihi
                                </label>
                                <input
                                  type="date"
                                  value={
                                    formData.actualEndDate
                                      ? dayjs(formData.actualEndDate).format('YYYY-MM-DD')
                                      : ''
                                  }
                                  onChange={(e) =>
                                    handleDateChange('actualEndDate', e.target.value)
                                  }
                                  className="block w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                                />
                              </div>
                            </div>
                          )}
                        </div>
                      </div>

                      {/* Progress Section */}
                      {isEdit && (
                        <div>
                          <h3 className="text-base font-semibold text-gray-900 mb-2">
                            İlerleme Durumu
                          </h3>
                          <div className="bg-gray-50 rounded-lg p-2.5">
                            <label className="block text-sm font-medium text-gray-700 mb-2">
                              Proje İlerleme: {formData.progress}%
                            </label>
                            <div className="relative">
                              <input
                                type="range"
                                min="0"
                                max="100"
                                value={formData.progress}
                                onChange={(e) =>
                                  handleInputChange('progress', parseFloat(e.target.value) || 0)
                                }
                                className="w-full h-2 bg-gray-200 rounded-lg appearance-none cursor-pointer"
                                style={{
                                  background: `linear-gradient(to right, #3b82f6 0%, #3b82f6 ${formData.progress}%, #e5e7eb ${formData.progress}%, #e5e7eb 100%)`,
                                }}
                              />
                              <div className="flex justify-between text-xs text-gray-500 mt-1.5">
                                <span>0%</span>
                                <span>25%</span>
                                <span>50%</span>
                                <span>75%</span>
                                <span>100%</span>
                              </div>
                            </div>
                            <div className="mt-3 w-full bg-gray-200 rounded-full h-2.5">
                              <div
                                className={classNames(
                                  'h-3 rounded-full transition-all duration-300',
                                  getProgressColor(formData.progress),
                                )}
                                style={{ width: `${formData.progress}%` }}
                              />
                            </div>
                          </div>
                        </div>
                      )}

                      {/* Active Status */}
                      <div>
                        <h3 className="text-base font-semibold text-gray-900 mb-2">
                          Durum Ayarları
                        </h3>
                        <div className="bg-gray-50 rounded-lg p-2.5">
                          <div className="flex items-center">
                            <input
                              type="checkbox"
                              id="isActive"
                              checked={formData.isActive}
                              onChange={(e) => handleInputChange('isActive', e.target.checked)}
                              className="h-4 w-4 text-blue-600 focus:ring-blue-500 border-gray-300 rounded"
                            />
                            <label htmlFor="isActive" className="ml-2 block text-sm text-gray-900">
                              Proje Aktif
                            </label>
                          </div>
                        </div>
                      </div>
                    </div>

                    {/* Stakeholders */}
                    <div className="space-y-3">
                      {/* Project Manager */}
                      <div>
                        <h3 className="text-base font-semibold text-gray-900 mb-2">
                          Proje Yöneticisi
                        </h3>
                        <div className="bg-gray-50 rounded-lg p-2.5">
                          <label className="block text-sm font-medium text-gray-700 mb-1">
                            Proje Yöneticisi *
                          </label>
                          <select
                            value={formData.projectManagerId}
                            onChange={(e) => handleInputChange('projectManagerId', e.target.value)}
                            className={`block w-full px-2.5 py-1.5 text-sm border rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${
                              errors.projectManagerId
                                ? 'border-red-300 focus:border-red-500'
                                : 'border-gray-300 focus:border-blue-500'
                            }`}
                          >
                            <option value="">Proje yöneticisi seçin</option>
                            {projectManagers.map((manager) => (
                              <option key={manager.id} value={manager.id}>
                                {manager.fullName}
                              </option>
                            ))}
                          </select>
                          {errors.projectManagerId && (
                            <p className="mt-1 text-sm text-red-600">{errors.projectManagerId}</p>
                          )}

                          {formData.projectManagerId && (
                            <div className="mt-1.5 p-2 bg-white rounded-lg border">
                              {(() => {
                                const manager = projectManagers.find(
                                  (m) => m.id === formData.projectManagerId,
                                )
                                return manager ? (
                                  <div className="flex items-center space-x-3">
                                    <div className="w-10 h-10 bg-blue-100 rounded-full flex items-center justify-center">
                                      <FaUser className="w-5 h-5 text-blue-600" />
                                    </div>
                                    <div>
                                      <h4 className="font-medium text-gray-900">
                                        {manager.fullName}
                                      </h4>
                                      <p className="text-sm text-gray-600">
                                        {manager.jobPosition?.name || 'Proje Yöneticisi'}
                                      </p>
                                      <div className="flex items-center mt-1 text-sm text-gray-500">
                                        <FaEnvelope className="w-3 h-3 mr-1" />
                                        {manager.email}
                                      </div>
                                      {manager.phone && (
                                        <div className="flex items-center mt-1 text-sm text-gray-500">
                                          <FaPhone className="w-3 h-3 mr-1" />
                                          {manager.phone}
                                        </div>
                                      )}
                                    </div>
                                  </div>
                                ) : null
                              })()}
                            </div>
                          )}
                        </div>
                      </div>

                      {/* Customer */}
                      <div>
                        <h3 className="text-base font-semibold text-gray-900 mb-2">Müşteri</h3>
                        <div className="bg-gray-50 rounded-lg p-2.5">
                          <label className="block text-sm font-medium text-gray-700 mb-1">
                            Müşteri
                          </label>
                          <select
                            value={formData.customerId}
                            onChange={(e) => handleInputChange('customerId', e.target.value)}
                            className="block w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                          >
                            <option value="">Müşteri seçin</option>
                            {customers.map((customer) => (
                              <option key={customer.id} value={customer.id}>
                                {customer.name}
                              </option>
                            ))}
                          </select>

                          {formData.customerId && (
                            <div className="mt-1.5 p-2 bg-white rounded-lg border">
                              {(() => {
                                const customer = customers.find((c) => c.id === formData.customerId)
                                return customer ? (
                                  <div className="flex items-center space-x-3">
                                    <div className="w-10 h-10 bg-green-100 rounded-full flex items-center justify-center">
                                      <FaBuilding className="w-5 h-5 text-green-600" />
                                    </div>
                                    <div>
                                      <h4 className="font-medium text-gray-900">{customer.name}</h4>
                                      <p className="text-sm text-gray-600">
                                        {customer.primaryContact?.firstName}{' '}
                                        {customer.primaryContact?.lastName}
                                      </p>
                                      {customer.primaryContact?.email && (
                                        <div className="flex items-center mt-1 text-sm text-gray-500">
                                          <FaEnvelope className="w-3 h-3 mr-1" />
                                          {customer.primaryContact.email}
                                        </div>
                                      )}
                                      {customer.primaryContact?.phone && (
                                        <div className="flex items-center mt-1 text-sm text-gray-500">
                                          <FaPhone className="w-3 h-3 mr-1" />
                                          {customer.primaryContact.phone}
                                        </div>
                                      )}
                                    </div>
                                  </div>
                                ) : null
                              })()}
                            </div>
                          )}
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              )}

              {/* Budget Tab */}
              {activeTab === 'budget' && (
                <div className="space-y-3">
                  <div className="grid grid-cols-1 lg:grid-cols-2 gap-3">
                    {/* Budget Information */}
                    <div className="space-y-3">
                      <div>
                        <h3 className="text-base font-semibold text-gray-900 mb-3">
                          Temel Bütçe Bilgileri
                        </h3>
                        <div className="bg-gray-50 rounded-lg p-3 space-y-3">
                          <div>
                            <label className="block text-sm font-medium text-gray-700 mb-1">
                              Toplam Bütçe *
                            </label>
                            <div className="relative">
                              <input
                                type="number"
                                min="0"
                                step="0.01"
                                value={formData.budget}
                                onChange={(e) =>
                                  handleInputChange('budget', parseFloat(e.target.value) || 0)
                                }
                                className={`block w-full px-2.5 py-1.5 text-sm border rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${
                                  errors.budget
                                    ? 'border-red-300 focus:border-red-500'
                                    : 'border-gray-300 focus:border-blue-500'
                                }`}
                                placeholder="0.00"
                              />
                              <span className="absolute right-3 top-2 text-gray-500 text-sm">
                                {formData.currency}
                              </span>
                            </div>
                            {errors.budget && (
                              <p className="mt-1 text-sm text-red-600">{errors.budget}</p>
                            )}
                          </div>

                          <div>
                            <label className="block text-sm font-medium text-gray-700 mb-1">
                              Para Birimi
                            </label>
                            <select
                              value={formData.currency}
                              onChange={(e) => handleInputChange('currency', e.target.value)}
                              className="block w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                            >
                              {mockCurrencies.map((currency) => (
                                <option key={currency.value} value={currency.value}>
                                  {currency.value} - {currency.label}
                                </option>
                              ))}
                            </select>
                          </div>

                          {isEdit && (
                            <div>
                              <label className="block text-sm font-medium text-gray-700 mb-1">
                                Gerçekleşen Maliyet
                              </label>
                              <div className="relative">
                                <input
                                  type="number"
                                  min="0"
                                  step="0.01"
                                  value={formData.actualCost}
                                  onChange={(e) =>
                                    handleInputChange('actualCost', parseFloat(e.target.value) || 0)
                                  }
                                  className="block w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                                  placeholder="0.00"
                                />
                                <span className="absolute right-3 top-2 text-gray-500 text-sm">
                                  {formData.currency}
                                </span>
                              </div>
                            </div>
                          )}
                        </div>
                      </div>
                    </div>

                    {/* Budget Analysis */}
                    {isEdit && (
                      <div className="space-y-3">
                        <div>
                          <h3 className="text-base font-semibold text-gray-900 mb-3">
                            Bütçe Analizi
                          </h3>
                          <div className="bg-white rounded-lg border border-gray-200 p-3 space-y-3">
                            {/* Budget Usage Chart */}
                            <div>
                              <div className="flex items-center justify-between mb-3">
                                <h4 className="text-sm font-medium text-gray-700">
                                  Bütçe Kullanımı
                                </h4>
                                <span className="text-xl font-bold text-green-600">
                                  {budgetUsagePercentage.toFixed(1)}%
                                </span>
                              </div>
                              <div className="w-full bg-gray-200 rounded-full h-3 mb-1.5">
                                <div
                                  className={classNames(
                                    'h-3 rounded-full transition-all duration-300',
                                    budgetUsagePercentage > 100
                                      ? 'bg-red-500'
                                      : budgetUsagePercentage > 80
                                        ? 'bg-orange-500'
                                        : budgetUsagePercentage > 60
                                          ? 'bg-yellow-500'
                                          : 'bg-green-500',
                                  )}
                                  style={{
                                    width: `${Math.min(budgetUsagePercentage, 100)}%`,
                                  }}
                                />
                              </div>
                              <div className="flex justify-between text-xs text-gray-500">
                                <span>₺{formData.actualCost.toLocaleString()}</span>
                                <span>₺{formData.budget.toLocaleString()}</span>
                              </div>
                            </div>

                            {/* Budget Statistics */}
                            <div className="grid grid-cols-1 gap-2">
                              <div className="bg-gray-50 rounded-lg p-2.5">
                                <div className="flex items-center justify-between">
                                  <span className="text-sm text-gray-600">Kalan Bütçe</span>
                                  <span
                                    className={classNames(
                                      'font-semibold',
                                      formData.budget - formData.actualCost >= 0
                                        ? 'text-green-600'
                                        : 'text-red-600',
                                    )}
                                  >
                                    ₺{(formData.budget - formData.actualCost).toLocaleString()}
                                  </span>
                                </div>
                              </div>

                              <div className="bg-gray-50 rounded-lg p-2.5">
                                <div className="flex items-center justify-between">
                                  <span className="text-sm text-gray-600">Aşılan Tutar</span>
                                  <span
                                    className={classNames(
                                      'font-semibold',
                                      formData.actualCost > formData.budget
                                        ? 'text-red-600'
                                        : 'text-gray-400',
                                    )}
                                  >
                                    {formData.actualCost > formData.budget
                                      ? `₺${(
                                          formData.actualCost - formData.budget
                                        ).toLocaleString()}`
                                      : '₺0'}
                                  </span>
                                </div>
                              </div>

                              {budgetUsagePercentage > 80 && (
                                <div className="bg-orange-50 border border-orange-200 rounded-lg p-2.5">
                                  <div className="flex items-center">
                                    <FaExclamationCircle className="w-4 h-4 text-orange-600 mr-2" />
                                    <span className="text-sm text-orange-800">
                                      {budgetUsagePercentage > 100
                                        ? 'Bütçe aşıldı!'
                                        : "Bütçe %80'in üzerinde kullanıldı!"}
                                    </span>
                                  </div>
                                </div>
                              )}
                            </div>
                          </div>
                        </div>
                      </div>
                    )}
                  </div>
                </div>
              )}

              {/* Phases Tab */}
              {activeTab === 'phases' && (
                <div className="space-y-3">
                  <div className="flex items-center justify-between">
                    <h2 className="text-lg font-semibold text-gray-900">Proje Fazları</h2>
                    <button
                      type="button"
                      onClick={openPhaseModal}
                      className="px-2.5 py-1.5 text-sm bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors flex items-center"
                    >
                      <FaPlus className="w-4 h-4 mr-2" />
                      Faz Ekle
                    </button>
                  </div>

                  <div className="bg-white rounded-lg border border-gray-200 overflow-hidden">
                    <div className="px-3 py-2 border-b border-gray-200">
                      <h3 className="text-base font-medium text-gray-900">
                        Faz Listesi ({phases.length})
                      </h3>
                    </div>
                    <div className="divide-y divide-gray-200">
                      {phases.length > 0 ? (
                        phases.map((phase, index) => (
                          <div key={phase.id || index} className="px-3 py-2 hover:bg-gray-50">
                            <div className="flex items-start justify-between">
                              <div className="flex-1">
                                <div className="flex items-center space-x-2 mb-1.5">
                                  <h4 className="text-sm font-medium text-gray-900">
                                    {phase.name}
                                  </h4>
                                  <span className="inline-flex items-center px-1.5 py-0.5 rounded-full text-xs font-medium bg-blue-100 text-blue-800">
                                    {phase.code}
                                  </span>
                                  <span className="inline-flex items-center px-1.5 py-0.5 rounded-full text-xs font-medium bg-green-100 text-green-800">
                                    {phase.status}
                                  </span>
                                </div>
                                <p className="text-sm text-gray-600 mb-1.5">{phase.description}</p>
                                <div className="flex items-center space-x-4 text-xs text-gray-500">
                                  <span>
                                    Başlangıç: {dayjs(phase.startDate).format('DD.MM.YYYY')}
                                  </span>
                                  <span>Bitiş: {dayjs(phase.endDate).format('DD.MM.YYYY')}</span>
                                  <span>Bütçe: ₺{phase.budget.toLocaleString()}</span>
                                  <span>İlerleme: %{phase.progress}</span>
                                </div>
                              </div>
                              <div className="flex items-center space-x-1 ml-3">
                                <button
                                  onClick={() => openEditPhaseModal(phase)}
                                  className="p-1 text-gray-400 hover:text-blue-600 hover:bg-blue-50 rounded-lg"
                                >
                                  <FaEdit className="w-4 h-4" />
                                </button>
                                <button
                                  onClick={() => handleDeletePhase(phase.id)}
                                  className="p-1 text-gray-400 hover:text-red-600 hover:bg-red-50 rounded-lg"
                                >
                                  <FaTrash className="w-4 h-4" />
                                </button>
                              </div>
                            </div>
                          </div>
                        ))
                      ) : (
                        <div className="px-4 py-6 text-center">
                          <FaFlag className="mx-auto h-10 w-10 text-gray-400" />
                          <h3 className="mt-2 text-sm font-medium text-gray-900">Faz bulunamadı</h3>
                          <p className="mt-1 text-sm text-gray-500">
                            Bu proje için henüz faz tanımlanmamış.
                          </p>
                          <button
                            onClick={openPhaseModal}
                            className="mt-2 px-2.5 py-1.5 text-sm bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors flex items-center mx-auto"
                          >
                            <FaPlus className="w-4 h-4 mr-2" />
                            İlk Fazı Ekle
                          </button>
                        </div>
                      )}
                    </div>
                  </div>
                </div>
              )}

              {/* Tasks Tab */}
              {activeTab === 'tasks' && (
                <div className="space-y-3">
                  <div className="bg-white rounded-lg border border-gray-200 overflow-hidden">
                    <div className="flex items-center justify-between px-2.5 py-2 border-b border-gray-200">
                      <h3 className="text-lg font-semibold text-gray-900">
                        Görev Listesi ({tasks.length})
                      </h3>
                      <button
                        type="button"
                        onClick={openTaskModal}
                        className="px-2.5 py-1.5 text-sm bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors flex items-center"
                      >
                        <FaPlus className="w-4 h-4 mr-2" />
                        Görev Ekle
                      </button>
                    </div>
                    <div className="divide-y divide-gray-200">
                      {tasks.length > 0 ? (
                        tasks.map((task, index) => (
                          <div key={index} className="px-3 py-2 hover:bg-gray-50">
                            <div className="flex items-start justify-between">
                              <div className="flex-1">
                                <div className="flex items-center space-x-2 mb-1.5">
                                  <h4 className="text-sm font-medium text-gray-900">{task.name}</h4>
                                  <span className="inline-flex items-center px-1.5 py-0.5 rounded-full text-xs font-medium bg-blue-100 text-blue-800">
                                    {task.taskCode}
                                  </span>
                                  <span
                                    className={`inline-flex items-center px-1.5 py-0.5 rounded-full text-xs font-medium ${
                                      task.status === TaskStatusEnum.Completed
                                        ? 'bg-green-100 text-green-800'
                                        : task.status === TaskStatusEnum.InProgress
                                          ? 'bg-yellow-100 text-yellow-800'
                                          : task.status === TaskStatusEnum.NotStarted
                                            ? 'bg-gray-100 text-gray-800'
                                            : 'bg-red-100 text-red-800'
                                    }`}
                                  >
                                    {task.status === TaskStatusEnum.Completed
                                      ? 'Tamamlandı'
                                      : task.status === TaskStatusEnum.InProgress
                                        ? 'Devam Ediyor'
                                        : task.status === TaskStatusEnum.NotStarted
                                          ? 'Başlamadı'
                                          : task.status}
                                  </span>
                                </div>
                                <p className="text-sm text-gray-600 mb-1.5">{task.description}</p>
                              </div>
                              <div className="flex items-center space-x-1 ml-3">
                                <button
                                  onClick={() => openEditTaskModal(task)}
                                  className="p-1 text-gray-400 hover:text-blue-600 hover:bg-blue-50 rounded-lg"
                                >
                                  <FaEdit className="w-4 h-4" />
                                </button>
                                <button
                                  onClick={() => handleDeleteTask(task.id)}
                                  className="p-1 text-gray-400 hover:text-red-600 hover:bg-red-50 rounded-lg"
                                >
                                  <FaTrash className="w-4 h-4" />
                                </button>
                              </div>
                            </div>
                          </div>
                        ))
                      ) : (
                        <div className="px-3 py-6 text-center">
                          <FaTasks className="mx-auto h-10 w-10 text-gray-400" />
                          <h3 className="mt-2 text-sm font-medium text-gray-900">
                            Görev bulunamadı
                          </h3>
                          <p className="mt-1 text-sm text-gray-500">
                            Bu proje için henüz görev tanımlanmamış.
                          </p>
                        </div>
                      )}
                    </div>
                  </div>
                </div>
              )}

              {/* Documents Tab */}
              {activeTab === 'documents' && (
                <div className="space-y-3">
                  <div className="bg-white rounded-lg border border-gray-200 overflow-hidden">
                    <div className="flex items-center justify-between px-2.5 py-2 border-b border-gray-200">
                      <h3 className="text-base font-medium text-gray-900">
                        Belge Listesi ({documents.length})
                      </h3>

                      <button
                        type="button"
                        onClick={openDocumentUploadModal}
                        className="px-2.5 py-1.5 text-sm bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors flex items-center"
                      >
                        <FaPlus className="w-4 h-4 mr-2" />
                        Belge Yükle
                      </button>
                    </div>
                    <div className="divide-y divide-gray-200">
                      {documents.length > 0 ? (
                        documents.map((doc, index) => (
                          <div key={index} className="px-3 py-2 hover:bg-gray-50">
                            <div className="flex items-center justify-between">
                              <div className="flex items-center space-x-2">
                                <div className="w-7 h-7 bg-blue-100 rounded-lg flex items-center justify-center">
                                  <FaFileAlt className="w-4 h-4 text-blue-600" />
                                </div>
                                <div>
                                  <h4 className="text-sm font-medium text-gray-900">
                                    {doc.documentName}
                                  </h4>
                                  <div className="flex items-center space-x-3 text-xs text-gray-500 mt-1">
                                    <span>{doc.documentType}</span>
                                    <span>{doc.fileSize} MB</span>
                                    <span>{dayjs(doc.uploadedAt).format('DD.MM.YYYY')}</span>
                                    <span>Yükleyen: {doc.uploadedBy}</span>
                                  </div>
                                </div>
                              </div>
                              <div className="flex items-center space-x-1">
                                <button
                                  onClick={() => openDocumentViewer(doc)}
                                  className="p-1 text-gray-400 hover:text-blue-600 hover:bg-blue-50 rounded-lg"
                                  title="Belgeyi Görüntüle"
                                >
                                  <FaEye className="w-4 h-4" />
                                </button>
                                <button
                                  onClick={() => handleDocumentDownload(doc)}
                                  className="p-1 text-gray-400 hover:text-green-600 hover:bg-green-50 rounded-lg"
                                  title="Belgeyi İndir"
                                >
                                  <FaDownload className="w-4 h-4" />
                                </button>
                                <button
                                  onClick={() => handleDeleteDocument(doc.id)}
                                  className="p-1 text-gray-400 hover:text-red-600 hover:bg-red-50 rounded-lg"
                                  title="Belgeyi Sil"
                                >
                                  <FaTrash className="w-4 h-4" />
                                </button>
                              </div>
                            </div>
                          </div>
                        ))
                      ) : (
                        <div className="px-3 py-6 text-center">
                          <FaFileAlt className="mx-auto h-10 w-10 text-gray-400" />
                          <h3 className="mt-2 text-sm font-medium text-gray-900">
                            Belge bulunamadı
                          </h3>
                          <p className="mt-1 text-sm text-gray-500">
                            Bu proje için henüz belge yüklenmemiş.
                          </p>
                        </div>
                      )}
                    </div>
                  </div>
                </div>
              )}

              {/* Risks Tab */}
              {activeTab === 'risks' && (
                <div className="space-y-3">
                  <div className="bg-white rounded-lg border border-gray-200 overflow-hidden">
                    <div className="flex items-center justify-between px-2.5 py-2 border-b border-gray-200">
                      <h3 className="text-base font-medium text-gray-900">
                        Risk Listesi ({risks.length})
                      </h3>
                      <button
                        type="button"
                        onClick={openRiskModal}
                        className="px-2.5 py-1.5 text-sm bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors flex items-center"
                      >
                        <FaPlus className="w-4 h-4 mr-2" />
                        Risk Ekle
                      </button>
                    </div>
                    <div className="divide-y divide-gray-200">
                      {risks.length > 0 ? (
                        risks.map((risk, index) => (
                          <div key={index} className="px-3 py-2 hover:bg-gray-50">
                            <div className="flex items-start justify-between">
                              <div className="flex-1">
                                <div className="flex items-center space-x-2 mb-1.5">
                                  <h4 className="text-sm font-medium text-gray-900">
                                    {risk.title}
                                  </h4>
                                  <span className="inline-flex items-center px-1.5 py-0.5 rounded-full text-xs font-medium bg-red-100 text-red-800">
                                    {risk.riskLevel}
                                  </span>
                                  <span className="inline-flex items-center px-1.5 py-0.5 rounded-full text-xs font-medium bg-blue-100 text-blue-800">
                                    {risk.status}
                                  </span>
                                </div>
                                <p className="text-sm text-gray-600 mb-1.5">{risk.description}</p>
                                {risk.mitigationPlan && (
                                  <div className="bg-gray-50 rounded-lg p-2 mb-2">
                                    <p className="text-xs font-medium text-gray-700 mb-1">
                                      Önlem Planı:
                                    </p>
                                    <p className="text-xs text-gray-600">{risk.mitigationPlan}</p>
                                  </div>
                                )}
                              </div>
                              <div className="flex items-center space-x-1 ml-3">
                                <button
                                  onClick={() => openEditRiskModal(risk)}
                                  className="p-1 text-gray-400 hover:text-blue-600 hover:bg-blue-50 rounded-lg"
                                  title="Risk Düzenle"
                                >
                                  <FaEdit className="w-4 h-4" />
                                </button>
                                <button
                                  onClick={() => handleDeleteRisk(risk.id)}
                                  className="p-1 text-gray-400 hover:text-red-600 hover:bg-red-50 rounded-lg"
                                  title="Risk Sil"
                                >
                                  <FaTrash className="w-4 h-4" />
                                </button>
                              </div>
                            </div>
                          </div>
                        ))
                      ) : (
                        <div className="px-3 py-6 text-center">
                          <FaExclamationCircle className="mx-auto h-10 w-10 text-gray-400" />
                          <h3 className="mt-2 text-sm font-medium text-gray-900">
                            Risk bulunamadı
                          </h3>
                          <p className="mt-1 text-sm text-gray-500">
                            Bu proje için henüz risk tanımlanmamış.
                          </p>
                        </div>
                      )}
                    </div>
                  </div>
                </div>
              )}
            </div>
          </div>

          {/* Form Actions */}
          <div className="flex items-center justify-end space-x-2 bg-white px-3 py-2 rounded-lg shadow-sm mt-3">
            <button
              type="button"
              onClick={handleCancel}
              className="inline-flex items-center px-3 py-1.5 border border-gray-300 shadow-sm text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50"
            >
              <FaTimes className="w-4 h-4 mr-2" />
              İptal
            </button>
            <button
              type="submit"
              disabled={saving}
              onClick={handleSubmit}
              className="inline-flex items-center px-3 py-1.5 border border-transparent text-sm font-medium rounded-md shadow-sm text-white bg-blue-600 hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed"
            >
              {saving ? (
                <>
                  <div className="animate-spin rounded-full h-4 w-4 border-b-2 border-white mr-2"></div>
                  Kaydediliyor...
                </>
              ) : (
                <>
                  <FaSave className="w-4 h-4 mr-2" />
                  {isEdit ? 'Güncelle' : 'Kaydet'}
                </>
              )}
            </button>
          </div>
        </div>
      </div>

      {/* Phase Modal */}
      <PhaseEditModal
        isOpen={isPhaseModalOpen}
        onClose={closePhaseModal}
        phase={editingPhase}
        onSubmit={handlePhaseSubmit}
        defaultProjectId={formData.id}
      />

      {/* Task Modal */}
      <TaskModal
        isOpen={isTaskModalOpen}
        onClose={closeTaskModal}
        task={editingTask}
        onSubmit={handleTaskSubmit}
        mode={editingTask ? 'edit' : 'create'}
        defaultProjectId={formData.id}
      />

      {/* Document Upload Modal */}
      <DocumentUploadModal
        isOpen={isDocumentUploadModalOpen}
        onClose={closeDocumentUploadModal}
        onSubmit={handleDocumentUpload}
      />

      {/* Document Viewer Modal */}
      <DocumentViewerModal
        isOpen={isDocumentViewerModalOpen}
        onClose={closeDocumentViewer}
        document={selectedDocument}
        onDownload={handleDocumentDownload}
      />

      {/* Risk Modal */}
      <RiskModal
        isOpen={isRiskModalOpen}
        onClose={closeRiskModal}
        risk={editingRisk}
        onSubmit={handleRiskSubmit}
        mode={editingRisk ? 'edit' : 'create'}
      />
    </Container>
  )
}

export default ProjectForm