import React, { useState, useEffect } from 'react'
import { FaTimes, FaSave, FaCalendar, FaClock } from 'react-icons/fa'
import { PmCalendarEvent, WorkOrderStatusEnum } from '../../../types/pm'
import { mockWorkCenters } from '../../../mocks/mockWorkCenters'
import { mockEmployees } from '../../../mocks/mockEmployees'
import { PriorityEnum } from '../../../types/common'
import { getPriorityText, getWorkOrderStatusText } from '@/utils/erp'

interface NewCalendarEventModalProps {
  isOpen: boolean
  onClose: () => void
  onSave: (event: Partial<PmCalendarEvent>) => void
  selectedDate?: Date
}

const NewCalendarEventModal: React.FC<NewCalendarEventModalProps> = ({
  isOpen,
  onClose,
  onSave,
  selectedDate,
}) => {
  const getInitialStartTime = () => {
    if (selectedDate) {
      const hour = selectedDate.getHours()
      const minute = selectedDate.getMinutes()
      return `${hour.toString().padStart(2, '0')}:${minute.toString().padStart(2, '0')}`
    }
    return '09:00'
  }

  const getInitialEndTime = () => {
    if (selectedDate) {
      const endTime = new Date(selectedDate)
      endTime.setHours(endTime.getHours() + 1)
      const hour = endTime.getHours()
      const minute = endTime.getMinutes()
      return `${hour.toString().padStart(2, '0')}:${minute.toString().padStart(2, '0')}`
    }
    return '10:00'
  }

  const [eventData, setEventData] = useState<Partial<PmCalendarEvent>>({
    title: '',
    type: 'plan',
    date: selectedDate || new Date(),
    startTime: getInitialStartTime(),
    endTime: getInitialEndTime(),
    status: WorkOrderStatusEnum.Planned,
    priority: PriorityEnum.Normal,
    assignedTo: '',
    workCenterCode: '',
    duration: 60,
  })

  const [errors, setErrors] = useState<Record<string, string>>({})

  // Update form data when selectedDate changes
  useEffect(() => {
    if (selectedDate) {
      const getInitialStartTime = () => {
        const hour = selectedDate.getHours()
        const minute = selectedDate.getMinutes()
        return `${hour.toString().padStart(2, '0')}:${minute.toString().padStart(2, '0')}`
      }

      const getInitialEndTime = () => {
        const endTime = new Date(selectedDate)
        endTime.setHours(endTime.getHours() + 1)
        const hour = endTime.getHours()
        const minute = endTime.getMinutes()
        return `${hour.toString().padStart(2, '0')}:${minute.toString().padStart(2, '0')}`
      }

      setEventData((prev) => ({
        ...prev,
        date: selectedDate,
        startTime: getInitialStartTime(),
        endTime: getInitialEndTime(),
      }))
    }
  }, [selectedDate])

  if (!isOpen) return null

  const validateForm = () => {
    const newErrors: Record<string, string> = {}

    if (!eventData.title?.trim()) {
      newErrors.title = 'Başlık gerekli'
    }
    if (!eventData.workCenterCode?.trim()) {
      newErrors.workCenterCode = 'İş Merkezi seçimi gerekli'
    }
    if (!eventData.startTime) {
      newErrors.startTime = 'Başlangıç saati gerekli'
    }
    if (!eventData.endTime) {
      newErrors.endTime = 'Bitiş saati gerekli'
    }
    if (eventData.startTime && eventData.endTime) {
      const start = new Date(`2000-01-01 ${eventData.startTime}`)
      const end = new Date(`2000-01-01 ${eventData.endTime}`)
      if (start >= end) {
        newErrors.endTime = 'Bitiş saati başlangıç saatinden sonra olmalı'
      }
    }

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

  const handleSave = () => {
    if (validateForm()) {
      // Calculate duration
      if (eventData.startTime && eventData.endTime) {
        const start = new Date(`2000-01-01 ${eventData.startTime}`)
        const end = new Date(`2000-01-01 ${eventData.endTime}`)
        const durationMinutes = (end.getTime() - start.getTime()) / (1000 * 60)
        eventData.duration = durationMinutes
      }

      onSave({
        ...eventData,
        id: `E${Date.now()}`, // Generate a simple ID
      })
      onClose()
      // Reset form
      setEventData({
        title: '',
        type: 'plan',
        date: selectedDate || new Date(),
        startTime: getInitialStartTime(),
        endTime: getInitialEndTime(),
        status: WorkOrderStatusEnum.Planned,
        priority: PriorityEnum.Normal,
        assignedTo: '',
        workCenterCode: '',
        duration: 60,
      })
      setErrors({})
    }
  }

  const handleInputChange = (
    field: keyof PmCalendarEvent,
    value: string | Date | PriorityEnum | WorkOrderStatusEnum | 'plan' | 'workorder' | 'scheduled',
  ) => {
    setEventData((prev) => ({
      ...prev,
      [field]: value,
    }))
    // Clear error when user starts typing
    if (errors[field]) {
      setErrors((prev) => ({
        ...prev,
        [field]: '',
      }))
    }
  }

  const generateTimeOptions = () => {
    const options = []
    for (let hour = 0; hour < 24; hour++) {
      for (let minute = 0; minute < 60; minute += 30) {
        const timeString = `${hour.toString().padStart(2, '0')}:${minute
          .toString()
          .padStart(2, '0')}`
        options.push(timeString)
      }
    }
    return options
  }

  const timeOptions = generateTimeOptions()

  return (
    <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
      <div className="bg-white rounded-lg w-full max-w-lg mx-4 max-h-[90vh] overflow-y-auto">
        {/* Header */}
        <div className="flex items-center justify-between p-4 border-b border-gray-200">
          <h2 className="text-xl font-bold text-gray-900">Yeni Bakım Planlaması</h2>
          <button onClick={onClose} className="text-gray-400 hover:text-gray-600 transition-colors">
            <FaTimes className="w-5 h-5" />
          </button>
        </div>

        {/* Content */}
        <div className="p-3 space-y-3">
          {/* Basic Info */}
          <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
            <div className="md:col-span-2">
              <label className="block text-sm font-medium text-gray-700 mb-1">Başlık *</label>
              <input
                type="text"
                value={eventData.title || ''}
                onChange={(e) => handleInputChange('title', e.target.value)}
                className={`w-full px-2.5 py-1.5 text-sm border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500 ${
                  errors.title ? 'border-red-500' : 'border-gray-300'
                }`}
                placeholder="Bakım planı başlığı"
              />
              {errors.title && <p className="text-red-500 text-xs mt-1">{errors.title}</p>}
            </div>

            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">Tip</label>
              <select
                value={eventData.type || 'plan'}
                onChange={(e) => handleInputChange('type', e.target.value as 'plan' | 'workorder')}
                className="w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
              >
                <option value="plan">Bakım Planı</option>
                <option value="workorder">İş Emri</option>
              </select>
            </div>

            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">Öncelik</label>
              <select
                value={eventData.priority || PriorityEnum.Normal}
                onChange={(e) => handleInputChange('priority', e.target.value as PriorityEnum)}
                className="w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
              >
                {Object.values(PriorityEnum).map((priority) => (
                  <option key={priority} value={priority}>
                    {getPriorityText(priority)}
                  </option>
                ))}
              </select>
            </div>

            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">İş Merkezi *</label>
              <select
                value={eventData.workCenterCode || ''}
                onChange={(e) => handleInputChange('workCenterCode', e.target.value)}
                className={`w-full px-2.5 py-1.5 text-sm border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500 ${
                  errors.workCenterCode ? 'border-red-500' : 'border-gray-300'
                }`}
              >
                <option value="">İş merkezi seçin</option>
                {mockWorkCenters.map((workCenter) => (
                  <option key={workCenter.id} value={workCenter.code}>
                    {workCenter.code} - {workCenter.name}
                  </option>
                ))}
              </select>
              {errors.workCenterCode && (
                <p className="text-red-500 text-xs mt-1">{errors.workCenterCode}</p>
              )}
            </div>

            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">Atanan Kişi</label>
              <select
                value={eventData.assignedTo || ''}
                onChange={(e) => handleInputChange('assignedTo', e.target.value)}
                className="w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
              >
                <option value="">Kişi seçin</option>
                {mockEmployees.map((employee) => (
                  <option key={employee.id} value={employee.fullName}>
                    {employee.fullName} ({employee.code})
                  </option>
                ))}
              </select>
            </div>
          </div>

          {/* Date and Time */}
          <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">
                <FaCalendar className="inline w-4 h-4 mr-2" />
                Tarih
              </label>
              <input
                type="date"
                value={eventData.date?.toISOString().split('T')[0] || ''}
                onChange={(e) => handleInputChange('date', new Date(e.target.value))}
                className="w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
              />
            </div>

            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">
                <FaClock className="inline w-4 h-4 mr-2" />
                Başlangıç Saati *
              </label>
              <select
                value={eventData.startTime || '09:00'}
                onChange={(e) => handleInputChange('startTime', e.target.value)}
                className={`w-full px-2.5 py-1.5 text-sm border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500 ${
                  errors.startTime ? 'border-red-500' : 'border-gray-300'
                }`}
              >
                {timeOptions.map((time) => (
                  <option key={time} value={time}>
                    {time}
                  </option>
                ))}
              </select>
              {errors.startTime && <p className="text-red-500 text-xs mt-1">{errors.startTime}</p>}
            </div>

            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">Bitiş Saati *</label>
              <select
                value={eventData.endTime || '10:00'}
                onChange={(e) => handleInputChange('endTime', e.target.value)}
                className={`w-full px-2.5 py-1.5 text-sm border rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500 ${
                  errors.endTime ? 'border-red-500' : 'border-gray-300'
                }`}
              >
                {timeOptions.map((time) => (
                  <option key={time} value={time}>
                    {time}
                  </option>
                ))}
              </select>
              {errors.endTime && <p className="text-red-500 text-xs mt-1">{errors.endTime}</p>}
            </div>
          </div>

          {/* Status */}
          {eventData.type === 'workorder' && (
            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">Durum</label>
              <select
                value={eventData.status || 'scheduled'}
                onChange={(e) =>
                  handleInputChange('status', e.target.value as WorkOrderStatusEnum | 'scheduled')
                }
                className="w-full px-2.5 py-1.5 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
              >
                {Object.values(WorkOrderStatusEnum).map((status) => (
                  <option key={status} value={status}>
                    {getWorkOrderStatusText(status)}
                  </option>
                ))}
              </select>
            </div>
          )}
        </div>

        {/* Footer */}
        <div className="flex items-center justify-end space-x-2 p-3 border-t border-gray-200">
          <button
            onClick={onClose}
            className="px-3 py-1 text-sm text-gray-600 border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
          >
            İptal
          </button>
          <button
            onClick={handleSave}
            className="px-3 py-1 text-sm bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors flex items-center space-x-2"
          >
            <FaSave className="w-4 h-4" />
            <span>Kaydet</span>
          </button>
        </div>
      </div>
    </div>
  )
}

export default NewCalendarEventModal