import { FaChevronRight, FaChevronDown } from 'react-icons/fa'
import Container from '@/components/shared/Container'
import { Button, Checkbox, Dialog, Input, Menu, toast } from '@/components/ui'
import { useConfig } from '@/components/ui/ConfigProvider'
import Notification from '@/components/ui/Notification'
import {
  GetPermissionListResultDto,
  PermissionGrantInfoDto,
  PermissionGroupDto,
  PermissionWithGroupName,
  PermissionWithStyle,
} from '@/proxy/admin/models'
import { getPermissions, getRoles, updatePermissions } from '@/services/identity.service'
import { useStoreActions, useStoreState } from '@/store'
import { useLocalization } from '@/utils/hooks/useLocalization'
import { ChangeEvent, useEffect, useMemo, useState } from 'react'

type OpenState = Record<string, boolean>

function RolesPermission({
  open,
  onDialogClose,
  name,
}: {
  open: boolean
  onDialogClose: () => void
  name: string
}) {
  // Collapse/expand state
  const [openPermissions, setOpenPermissions] = useState<OpenState>({})

  // Parent izinleri aç/kapat
  const togglePermission = (permName: string) => {
    setOpenPermissions((prev) => ({ ...prev, [permName]: !prev[permName] }))
  }

  // Parent izin mi?
  function isParent(permission: PermissionWithStyle) {
    return selectedGroupPermissions.some((p) => p.parentName === permission.name)
  }

  // Belirli parent'ın alt izinleri
  function getChildren(parentName: string) {
    if (!parentName) return []
    return selectedGroupPermissions.filter((p) => p.parentName === parentName)
  }
  const providerName = 'R'
  const { translate } = useLocalization()
  const { getConfig } = useStoreActions((a) => a.abpConfig)

  const [isLoading, setIsLoading] = useState(false)
  const [permissionList, setPermissionList] = useState<GetPermissionListResultDto>()
  const [selectedGroup, setSelectedGroup] = useState<PermissionGroupDto | undefined>()
  const [selectedGroupPermissions, setSelectedGroupPermissions] = useState<PermissionWithStyle[]>(
    [],
  )
  const [searchTerm, setSearchTerm] = useState('')
  const mode = useStoreState((state) => state.theme.mode)
  const tenant = useStoreState((state) => state.auth.tenant)

  const { direction } = useConfig()
  const className = `m${direction[0]}-`

  const fetchDataPermissions = async () => {
    if (!name) return

    const response = await getPermissions(providerName, name)
    const data = response.data

    const tenantGroup = tenant?.menuGroup?.trim()
    if (!tenantGroup) {
      console.warn('Tenant menuGroup boş, tüm izinler gösterilecek')
      setPermissionList(data)
      return
    }

    const filteredGroups = data.groups
      .map((group: any) => {
        const filteredPermissions = group.permissions.filter((perm: any) => {
          if (!perm.menuGroup) return false
          const groups =
            typeof perm.menuGroup === 'string'
              ? perm.menuGroup.split('|').map((g: string) => g.trim())
              : perm.menuGroup
          return groups.includes(tenantGroup)
        })

        return { ...group, permissions: filteredPermissions }
      })
      .filter((group: any) => group.permissions.length > 0)

    const filteredData = { ...data, groups: filteredGroups }

    setPermissionList(filteredData)
  }

  const changeGroup = (groupName?: string) => {
    const group = permissionList?.groups.find((a: any) => a.name === groupName)

    if (!group) {
      setSelectedGroup(undefined)
      setSelectedGroupPermissions([])
      return
    }

    setSelectedGroup(group)

    const selectedGroupPerm = group.permissions.map(
      (permission: any) =>
        ({
          ...permission,
          class: className + findMargin(group.permissions, permission) * 4,
        }) as PermissionWithStyle,
    )

    setSelectedGroupPermissions(selectedGroupPerm)
  }

  const onDialogOk = async () => {
    try {
      setIsLoading(true)

      if (permissionList?.groups && name) {
        const listPermissions = await getPermissions(providerName, name)
        const unChangedPermissions = getPermissionsWithGroupName(listPermissions.data?.groups)
        const changedPermissions = getPermissionsWithGroupName(permissionList.groups)

        const updatePermList = changedPermissions
          .filter(
            (per) =>
              (unChangedPermissions.find((unChanged) => unChanged.name === per.name) || {})
                .isGranted !== per.isGranted,
          )
          .map(({ name, isGranted }) => ({ name, isGranted }))

        // 🔴 KRİTİK NOKTA
        await updatePermissions(providerName, name, {
          permissions: updatePermList,
        })

        // ✅ artık backend kesin güncel
        await getConfig(false)

        toast.push(<Notification title={'Permission updated'} type="success" />, {
          placement: 'top-end',
        })
      }

      onDialogClose()
    } catch (err) {
      console.error(err)
    } finally {
      setIsLoading(false)
    }
  }

  // --- Expand/Collapse All fonksiyonları (tüm state ve yardımcı fonksiyonlardan sonra) ---
  const handleExpandAll = () => {
    const expanded: OpenState = {}
    function expandRecursively(perms: PermissionWithStyle[]) {
      perms.forEach((perm) => {
        if (isParent(perm)) {
          expanded[perm.name || ''] = true
          // Alt parent'ları da recursive aç
          const children = getChildren(perm.name || '')
          expandRecursively(children)
        }
      })
    }
    // Tüm parent ve alt parent'ları recursive olarak aç
    expandRecursively(selectedGroupPermissions)
    setOpenPermissions(expanded)
  }

  const handleCollapseAll = () => {
    setOpenPermissions({})
  }

  function getPermissionsWithGroupName(groups: PermissionGroupDto[]): PermissionWithGroupName[] {
    return groups.reduce(
      (acc, val) => [
        ...acc,
        ...val.permissions.map<PermissionWithGroupName>((p: any) => ({
          ...p,
          groupName: val.name || '',
        })),
      ],
      [] as PermissionWithGroupName[],
    )
  }

  function findMargin(
    permissions: PermissionGrantInfoDto[],
    permission: PermissionGrantInfoDto,
    level = 0,
  ): number {
    const parentPermission = permissions.find((per) => per.name === permission.parentName)
    if (parentPermission) {
      return findMargin(permissions, parentPermission, level + 1)
    } else {
      return level
    }
  }

  const isAllSelected = useMemo(
    () =>
      permissionList?.groups.every((group: any) =>
        group.permissions.every((permission: any) => permission.isGranted),
      ),
    [permissionList],
  )

  const isAllSelectedForGroup = useMemo(
    () => selectedGroupPermissions.every((permission) => permission.isGranted),
    [selectedGroupPermissions],
  )

  // Collapse/expand için recursive düzende izinleri döndür
  const filteredPermissions = useMemo(() => {
    const lowerTerm = searchTerm.toLowerCase()

    // Filtreli veya tüm parent izinler
    const parents = selectedGroupPermissions.filter(
      (p) =>
        !p.parentName &&
        (searchTerm === '' ||
          translate('::' + p.displayName)
            .toLowerCase()
            .includes(lowerTerm)),
    )

    // Recursive children builder (her seviye için doğru level)
    function buildTree(
      parent: PermissionWithStyle,
      level: number,
    ): (PermissionWithStyle & { level: number })[] {
      const arr = [{ ...parent, level }]
      const parentKey = parent.name || ''
      if (openPermissions[parentKey] || searchTerm) {
        const children = getChildren(parentKey)
        children.forEach((child) => {
          arr.push(...buildTree(child, level + 1))
        })
      }
      return arr
    }

    // Tüm parentlar ve altlarını sırayla ekle
    let result: (PermissionWithStyle & { level: number })[] = []
    parents.forEach((parent) => {
      result = result.concat(buildTree(parent, 0))
    })
    return result
  }, [selectedGroupPermissions, searchTerm, translate, openPermissions])

  const onSelectAll = (value: boolean, e: ChangeEvent<HTMLInputElement>) => {
    if (!permissionList) {
      return
    }

    const currentGroupName = selectedGroup?.name
    setSelectedGroup(undefined)
    setSelectedGroupPermissions([])

    if (e.target.name === 'group') {
      permissionList?.groups
        .find((group: any) => group.name === selectedGroup?.name)
        ?.permissions.forEach((permission: any) => {
          permission.isGranted = value
        })
    } else {
      permissionList?.groups.forEach((group: any) => {
        group.permissions.forEach((permission: any) => {
          permission.isGranted = value
        })
      })
    }

    setPermissionList({ ...permissionList })

    changeGroup(currentGroupName)
  }

  function onClickCheckbox(clickedPermission: PermissionGrantInfoDto) {
    if (!permissionList) {
      return
    }

    const groupPerm = selectedGroupPermissions.map((per) => {
      if (clickedPermission.name === per.name) {
        return { ...per, isGranted: !per.isGranted }
      } else if (clickedPermission.name === per.parentName && clickedPermission.isGranted) {
        return { ...per, isGranted: false }
      } else if (clickedPermission.parentName === per.name && !clickedPermission.isGranted) {
        return { ...per, isGranted: true }
      }
      return per
    })

    const permGroup = permissionList?.groups.find((a: any) => a.name === selectedGroup?.name)
    if (permGroup) {
      permGroup.permissions = groupPerm
    }

    setPermissionList({ ...permissionList })
    setSelectedGroupPermissions(groupPerm)
  }

  useEffect(() => {
    fetchDataPermissions()
  }, [name])

  // --- Copy Permissions State and Logic ---
  const [roleList, setRoleList] = useState<string[]>([])

  // --- Copy Permissions Dialog State ---
  const [copyDialogOpen, setCopyDialogOpen] = useState(false)
  const [copyDialogRole, setCopyDialogRole] = useState('')

  // Fetch all roles for select (except current)
  useEffect(() => {
    async function fetchRoles() {
      try {
        const res = await getRoles()
        setRoleList(res.data.items?.map((r: any) => r.name) || [])
      } catch (e) {
        setRoleList([])
      }
    }
    fetchRoles()
  }, [copyDialogOpen])

  // Dialog üzerinden kopyalama işlemi
  const handleCopyDialogConfirm = async () => {
    if (!copyDialogRole || !permissionList) return
    setIsLoading(true)
    try {
      const res = await getPermissions(providerName, copyDialogRole)
      const sourcePerms = getPermissionsWithGroupName(res.data?.groups)
      const grantedNames = new Set(sourcePerms.filter((p) => p.isGranted).map((p) => p.name))
      permissionList.groups.forEach((group) => {
        group.permissions.forEach((perm) => {
          perm.isGranted = grantedNames.has(perm.name)
        })
      })
      setPermissionList({ ...permissionList })
      changeGroup(selectedGroup?.name)
      toast.push(<Notification title={translate('::PermissionsCopied')} type="success" />, {
        placement: 'top-end',
      })
      setCopyDialogOpen(false)
      setCopyDialogRole('')
    } catch (e) {
      toast.push(<Notification title={translate('::CopyFailed')} type="danger" />, {
        placement: 'top-end',
      })
    } finally {
      setIsLoading(false)
    }
  }

  return permissionList ? (
    <Container>
      <Dialog
        width="min(900px, 95vw)"
        isOpen={open}
        onAfterOpen={() => changeGroup(permissionList?.groups[0].name)}
        onClose={onDialogClose}
        onRequestClose={onDialogClose}
      >
        <h5 className="mb-1">
          {translate('::Permission')} - {name}
        </h5>
        <hr className="mt-1 mb-2"></hr>

        <div className="flex flex-col md:flex-row gap-4 mb-1">
          <div className="w-full md:w-1/3">
            <Checkbox name="all" checked={isAllSelected} onChange={onSelectAll}>
              {translate('AbpPermissionManagement::SelectAllInAllTabs')}
            </Checkbox>
          </div>
          <div className="w-full md:w-2/3">
            <Checkbox name="group" checked={isAllSelectedForGroup} onChange={onSelectAll}>
              {translate('AbpPermissionManagement::SelectAllInThisTab')}
            </Checkbox>

            <Button size="sm" variant="plain" onClick={handleExpandAll} icon={<FaChevronRight />}>
              {translate('::ListForms.ListFormEdit.ExpandAll')}
            </Button>
            <Button size="sm" variant="plain" onClick={handleCollapseAll} icon={<FaChevronDown />}>
              {translate('::ListForms.ListFormEdit.CollapseAll')}
            </Button>
          </div>
        </div>

        <div className="flex flex-col md:flex-row gap-4">
          <div className="w-full md:w-1/3 max-h-[450px] overflow-y-auto">
            <hr className="mb-2"></hr>
            <Menu
              className="w-full"
              variant={mode}
              defaultActiveKeys={[selectedGroup?.displayName ?? '']}
            >
              {permissionList?.groups.map((group: any) => (
                <Menu.MenuItem
                  key={group.name}
                  className="break-all whitespace-normal"
                  eventKey={group.name}
                  onSelect={changeGroup}
                >
                  {translate('::' + group.displayName)} (
                  {group.permissions.filter((a: any) => a.isGranted).length})
                </Menu.MenuItem>
              ))}
            </Menu>
          </div>
          <div className="w-full md:w-2/3 max-h-[450px] overflow-y-auto">
            <hr className="mb-2"></hr>
            <div className="flex items-center gap-2 mb-2">
              <Input
                size="sm"
                className=""
                placeholder={translate('::Search')}
                value={searchTerm}
                onChange={(e) => setSearchTerm(e.target.value)}
              />
            </div>
            <div className="my-1">
              {filteredPermissions.map((permission) => {
                const isParentPerm = isParent(permission)
                const permKey = permission.name || ''
                const children = getChildren(permKey)
                return (
                  <div key={permission.name} className={`ml-${permission.level * 4} group`}>
                    <div className="flex items-center gap-2 px-2 py-0.5 rounded-md hover:bg-gray-50 transition-all">
                      {/* Expand Icon */}
                      {isParentPerm ? (
                        <button
                          onClick={(e) => {
                            e.stopPropagation()
                            togglePermission(permKey)
                          }}
                          className="w-5 h-5 flex items-center justify-center rounded hover:bg-gray-200 transition"
                        >
                          {openPermissions[permKey] || searchTerm ? (
                            <FaChevronDown className="text-gray-500 text-xs" />
                          ) : (
                            <FaChevronRight className="text-gray-500 text-xs" />
                          )}
                        </button>
                      ) : (
                        <div className="w-5" />
                      )}

                      {/* Checkbox */}
                      <Checkbox
                        name={permission.name}
                        checked={permission.isGranted}
                        onChange={() => onClickCheckbox(permission)}
                      >
                        <span className="text-sm text-gray-700 group-hover:text-gray-900 transition">
                          {translate('::' + permission.displayName)}
                        </span>
                      </Checkbox>
                    </div>
                  </div>
                )
              })}
            </div>
          </div>
        </div>
        <div className="flex justify-between items-center mt-6">
          <div className="flex items-center">
            <Button variant="solid" color="sky-500" onClick={() => setCopyDialogOpen(true)}>
              {translate('::AbpIdentity.Roles.CopyPermissions')}
            </Button>
          </div>
          <div className="text-right">
            <Button className="ltr:mr-2 rtl:ml-2" variant="plain" onClick={onDialogClose}>
              {translate('::Cancel')}
            </Button>
            <Button variant="solid" loading={isLoading} onClick={onDialogOk}>
              {isLoading ? translate('::SavingWithThreeDot') : translate('::Save')}
            </Button>
          </div>
        </div>
      </Dialog>

      {/* Copy Permissions Dialog */}
      <Dialog
        isOpen={copyDialogOpen}
        width="min(400px, 95vw)"
        onClose={() => setCopyDialogOpen(false)}
      >
        <h5 className="mb-2">{translate('::AbpIdentity.Roles.CopyPermissions')}</h5>
        <div className="mb-4">
          <select
            className="border rounded px-2 py-1 w-full"
            value={copyDialogRole}
            onChange={(e) => setCopyDialogRole(e.target.value)}
          >
            <option value="">{translate('::App.Select')}</option>
            {roleList
              .filter((role) => role !== name)
              .map((role) => (
                <option key={role} value={role}>
                  {role}
                </option>
              ))}
          </select>
        </div>
        <div className="flex justify-end gap-2">
          <Button variant="plain" onClick={() => setCopyDialogOpen(false)}>
            {translate('::Cancel')}
          </Button>
          <Button
            variant="solid"
            onClick={handleCopyDialogConfirm}
            disabled={!copyDialogRole || isLoading}
            loading={isLoading}
          >
            {translate('::Copy')}
          </Button>
        </div>
      </Dialog>
    </Container>
  ) : (
    <></>
  )
}

export default RolesPermission