/**
 * useUserOperations Hook
 * 
 * 用户操作Hook
 * 统一管理用户相关的操作（更新、删除、切换状态等）
 * 包括：更新用户、删除用户、切换下载权限、切换激活状态、设置角色、转移最高权限
 * 
 * @created 2025-01-XX（从 page.tsx 提取）
 * @hook
 */

'use client'

import { useCallback } from 'react'
import type { User, Department, ApiSuccessResponse } from '../_components/types'
import { parseErrorResponse } from '../_utils/api'
import type { ToastFn } from '../_components/types'

interface UseUserOperationsOptions {
  users: User[]
  setUsers: React.Dispatch<React.SetStateAction<User[]>>
  showToast: ToastFn
  fetchData: () => Promise<void>
  findDepartmentManagers: (departmentName: string | null | undefined) => User[] | null
}

export function useUserOperations({
  users,
  setUsers,
  showToast,
  fetchData,
  findDepartmentManagers,
}: UseUserOperationsOptions) {
  const updateUser = useCallback(
    async (user: User, payload: { username: string; department: string }) => {
      const { username, department } = payload
      const usernameChanged = username !== user.username
      const departmentChanged = department !== (user.department || '')

      if (!usernameChanged && !departmentChanged) {
        showToast('未做任何修改', 'error')
        return false
      }

      try {
        let materialsUpdated = false
        let parentIdToSet: string | null = null

        if (departmentChanged && department) {
          const managers = findDepartmentManagers(department) || []
          if (managers.length > 0) {
            const firstManager = managers.find((manager) => manager.id !== user.id) || managers[0]
            parentIdToSet = firstManager.id
          }
        }

        if (usernameChanged || departmentChanged) {
          const response = await fetch('/api/admin/users/update', {
            method: 'POST',
            headers: {
              'Content-Type': 'application/json',
            },
            body: JSON.stringify({
              userId: user.id,
              username,
              department,
            }),
          })

          if (!response.ok) {
            const errorData = await parseErrorResponse(response)
            showToast(errorData.error || '更新失败', 'error')
            return false
          }
          const successData = (await response.json()) as ApiSuccessResponse<{ materialsUpdated?: boolean }>
          materialsUpdated = Boolean(successData.materialsUpdated)

          if (departmentChanged && parentIdToSet) {
            const hierarchyResponse = await fetch('/api/admin/users/update-hierarchy', {
              method: 'POST',
              headers: {
                'Content-Type': 'application/json',
              },
              body: JSON.stringify({
                userId: user.id,
                parentId: parentIdToSet,
              }),
            })

            if (!hierarchyResponse.ok) {
              const errorData = await parseErrorResponse(hierarchyResponse)
              showToast(errorData.error || '调整上下级失败', 'error')
              return false
            }
          }
        }

        await fetchData()
        showToast(materialsUpdated ? '用户信息已更新，素材信息已同步' : '用户信息已更新')
        return true
      } catch (error) {
        console.error('Update user error:', error)
        showToast('更新失败，请稍后重试', 'error')
        return false
      }
    },
    [showToast, fetchData, findDepartmentManagers]
  )

  const deleteUser = useCallback(
    async (id: string) => {
      try {
        const response = await fetch(`/api/admin/users?id=${id}`, {
          method: 'DELETE',
        })

        if (response.ok) {
          setUsers((prevUsers) => prevUsers.filter((u) => u.id !== id))
          showToast('删除成功')
          return true
        }
        const errorData = await parseErrorResponse(response)
        showToast(errorData.error || '删除失败', 'error')
        return false
      } catch (error) {
        console.error('Error deleting user:', error)
        showToast('删除失败', 'error')
        return false
      }
    },
    [setUsers, showToast]
  )

  const toggleDownload = useCallback(
    async (userId: string, currentCanDownload: boolean) => {
      const action = currentCanDownload ? '关闭' : '开启'

      try {
        const response = await fetch('/api/admin/users/toggle-download', {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json',
          },
          body: JSON.stringify({ userId }),
        })

        if (response.ok) {
          // 直接更新本地状态，避免重新加载整个列表
          setUsers((prevUsers) =>
            prevUsers.map((user) =>
              user.id === userId ? { ...user, canDownload: !currentCanDownload } : user
            )
          )
          showToast(`下载权限已${action}`)
        } else {
          const errorData = await parseErrorResponse(response)
          showToast(errorData.error || '操作失败', 'error')
        }
      } catch (error) {
        console.error('Error toggling download permission:', error)
        showToast('操作失败', 'error')
      }
    },
    [setUsers, showToast]
  )

  const toggleActive = useCallback(
    async (userId: string, currentStatus: boolean) => {
      const action = currentStatus ? '禁用' : '激活'

      try {
        const response = await fetch('/api/admin/users/toggle-active', {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json',
          },
          body: JSON.stringify({
            userId,
            isActive: !currentStatus,
          }),
        })

        if (response.ok) {
          // 直接更新本地状态
          setUsers((prevUsers) =>
            prevUsers.map((user) => (user.id === userId ? { ...user, isActive: !currentStatus } : user))
          )
          showToast(`${action}成功`)
        } else {
          const errorData = await parseErrorResponse(response)
          showToast(errorData.error || `${action}失败`, 'error')
        }
      } catch (error) {
        console.error('Toggle active error:', error)
        showToast(`${action}失败`, 'error')
      }
    },
    [setUsers, showToast]
  )

  const setRole = useCallback(
    async (userId: string, currentRole: string) => {
      const newRole = currentRole === 'ADMIN' ? 'USER' : 'ADMIN'
      const action = newRole === 'ADMIN' ? '设置为管理员' : '取消管理员权限'

      try {
        const response = await fetch('/api/admin/users/set-role', {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json',
          },
          body: JSON.stringify({
            userId,
            role: newRole,
          }),
        })

        if (response.ok) {
          // 刷新数据，用户树会同步更新最新的管理员信息
          await fetchData()
          showToast(`${action}成功`)
        } else {
          const errorData = await parseErrorResponse(response)
          showToast(errorData.error || `${action}失败`, 'error')
        }
      } catch (error) {
        console.error('Set role error:', error)
        showToast(`${action}失败`, 'error')
      }
    },
    [showToast, fetchData]
  )

  const transferSuperAdmin = useCallback(
    async (targetEmail: string, password: string) => {
      try {
        const res = await fetch('/api/admin/transfer-superadmin', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ targetEmail, password }),
        })
        if (res.ok) {
          showToast('最高权限已转移')
          await fetchData()
          return true
        }
        const errorData = await parseErrorResponse(res)
        showToast(errorData.error || '操作失败', 'error')
        return false
      } catch (err) {
        console.error('transfer super admin error:', err)
        showToast('操作失败，请稍后重试', 'error')
        return false
      }
    },
    [showToast, fetchData]
  )

  return {
    updateUser,
    deleteUser,
    toggleDownload,
    toggleActive,
    setRole,
    transferSuperAdmin,
  }
}

export type UseUserOperationsReturn = ReturnType<typeof useUserOperations>