import type { ColumnDef } from '@tanstack/vue-table'
import { h, ref } from 'vue'
import { Camera, MoreHorizontal, Edit, ListTodo, Trash2, ArrowUpDown, ArrowUp, ArrowDown, ChevronDown } from 'lucide-vue-next'
import { Badge } from '@/components/ui/badge'
import { Button } from '@/components/ui/button'
import { Checkbox } from '@/components/ui/checkbox'
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from '@/components/ui/dropdown-menu'
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from '@/components/ui/popover'

import EditableTaskStatus from './EditableTaskStatus.vue'
import TaskStatusBadge from '@/components/task/TaskStatusBadge.vue'
import { type Shot, ShotStatus, TaskStatus } from '@/services/shot'

// Helper function to get the appropriate sort icon
const getSortIcon = (sortDirection: false | 'asc' | 'desc') => {
  if (sortDirection === 'asc') {
    return h(ArrowDown, { class: 'ml-2 h-4 w-4' })
  } else if (sortDirection === 'desc') {
    return h(ArrowUp, { class: 'ml-2 h-4 w-4' })
  } else {
    return h(ArrowUpDown, { class: 'ml-2 h-4 w-4' })
  }
}

export interface ShotColumnMeta {
  projectId: number
  episodes: Array<{ id: number; name: string }>
  onEdit: (shot: Shot) => void
  onDelete: (shot: Shot) => void
  onViewTasks: (shot: Shot) => void
  onTaskStatusUpdated: (shotId: number, taskType: string, newStatus: TaskStatus) => void
  onTaskAssignmentUpdated?: (shotId: number, taskType: string, userId: number | null) => void
  onBulkTaskStatusChange?: (taskType: string, status: TaskStatus) => void
  getSelectedCount?: () => number
  getAllStatusOptions?: () => Array<{ id: string; name: string; color?: string; is_system?: boolean }>
}

export const createShotColumns = (
  allTaskTypes: string[],
  meta: ShotColumnMeta
): ColumnDef<Shot>[] => {
  const columns: ColumnDef<Shot>[] = [
    // Select column
    {
      id: 'select',
      header: ({ table }) =>
        h(Checkbox, {
          modelValue: table.getIsAllPageRowsSelected(),
          'onUpdate:modelValue': (value: boolean | 'indeterminate') => table.toggleAllPageRowsSelected(value === true),
          ariaLabel: 'Select all',
        }),
      cell: ({ row }) =>
        h(Checkbox, {
          modelValue: row.getIsSelected(),
          'onUpdate:modelValue': (value: boolean | 'indeterminate') => row.toggleSelected(value === true),
          ariaLabel: 'Select row',
          onClick: (e: Event) => e.stopPropagation(),
        }),
      enableSorting: false,
      enableHiding: false,
    },
    // Thumbnail column
    {
      id: 'thumbnail',
      header: 'Thumbnail',
      cell: () => {
        return h('div', { class: 'w-20 h-11 bg-gray-500/20 flex items-center justify-center' }, [
          h(Camera, { class: 'h-6 w-6 text-muted-foreground text-gray-900' }),
        ])
      },
      enableSorting: false,
    },
    // Shot Name column
    {
      accessorKey: 'name',
      header: ({ column }) => {
        return h(
          // Button,
          // {
          //   variant: 'ghost',
          //   onClick: () => column.toggleSorting(column.getIsSorted() === 'desc'),
          // },
          // () => ['Shot Name', getSortIcon(column.getIsSorted())]
          'div', {class:'flex items-center justify-center'}, ['Shot Name', getSortIcon(column.getIsSorted())]
        )
      },
      cell: ({ row }) => {
        const shot = row.original
        return h('div', { class: 'flex items-center gap-2' }, [
          // h(Camera, { class: 'h-4 w-4 text-muted-foreground flex-shrink-0' }),
          h('span', { class: 'font-medium' }, shot.name),
        ])
      },
    },
    // Episode column
    {
      id: 'episode',
      accessorFn: (row) => {
        const episode = meta.episodes.find((e) => e.id === row.episode_id)
        return episode ? episode.name : `Episode ${row.episode_id}`
      },
      header: ({ column }) => {
        return h(
          'div', {class:'flex items-center justify-center'}, ['Episode', getSortIcon(column.getIsSorted())]
        )
      },
      cell: ({ row }) => {
        const shot = row.original
        const episode = meta.episodes.find((e) => e.id === shot.episode_id)
        const episodeName = episode ? episode.name : `Episode ${shot.episode_id}`
        return h(Badge, { variant: 'outline', class: 'text-xs' }, () => episodeName)
      },
    },
    // Frames column (frame count)
    {
      id: 'frames',
      accessorFn: (row) => row.frame_end - row.frame_start + 1,
      header: ({ column }) => {
        return h(
          'div', {class:'flex items-center justify-center'}, ['Frames', getSortIcon(column.getIsSorted())]
        )
      },
      cell: ({ row }) => {
        const shot = row.original
        const frameCount = shot.frame_end - shot.frame_start + 1
        return h('span', { class: 'text-sm font-medium' }, frameCount.toString())
      },
    },
    // Status column
    {
      accessorKey: 'status',
      header: ({ column }) => {
        return h(
          'div', {class:'flex items-center justify-center'}, ['Status', getSortIcon(column.getIsSorted())]
        )
      },
      cell: ({ row }) => {
        const shot = row.original
        const variant = getStatusVariant(shot.status)
        const label = formatStatus(shot.status)
        return h(Badge, { variant, class: 'text-xs' }, () => label)
      },
    },
  ]

  // Add task status columns dynamically
  allTaskTypes.forEach((taskType) => {
    // Create ref for popover state for each task type
    const isPopoverOpen = ref(false)
    
    columns.push({
      accessorKey: `task_status.${taskType}`,
      id: taskType,
      header: ({ column }) => {
        const selectedCount = meta.getSelectedCount?.() || 0
        
        if (selectedCount > 0) {
          return h('div', { class: 'flex items-center gap-2' }, [
            h(
              'div',
              { class: 'flex items-center justify-center' },
              [formatTaskType(taskType), getSortIcon(column.getIsSorted())]
            ),
            h('div', { onClick: (e: Event) => e.stopPropagation() }, [
              h(Popover, {
                open: isPopoverOpen.value,
                'onUpdate:open': (value: boolean) => { isPopoverOpen.value = value }
              }, {
                default: () => [
                  h(PopoverTrigger, {}, {
                    default: () => h(
                      Button,
                      {
                        variant: 'outline',
                        size: 'sm',
                        class: 'h-6 w-6 p-0',
                      },
                      () => h(ChevronDown, { class: 'h-3 w-3' })
                    ),
                  }),
                  h(PopoverContent, { class: 'w-48 p-2', align: 'start' }, {
                    default: () => {
                      // Get task statuses from meta
                      const allStatusOptions = meta.getAllStatusOptions?.() || []
                      
                      return h('div', { class: 'flex flex-col gap-1' }, [
                        h('div', { class: 'px-2 py-1.5 text-sm font-semibold' }, `Change ${formatTaskType(taskType)} Status`),
                        ...allStatusOptions.map((statusOption) =>
                          h(
                            Button,
                            {
                              variant: 'ghost',
                              size: 'sm',
                              class: 'justify-start',
                              onClick: () => {
                                meta.onBulkTaskStatusChange?.(taskType, statusOption.id as TaskStatus)
                                isPopoverOpen.value = false
                              },
                            },
                            () => h(TaskStatusBadge, { status: statusOption, compact: true })
                          )
                        ),
                      ])
                    },
                  }),
                ],
              }),
            ]),
          ])
        }
        
        return h(
          'div', 
          { class: 'flex items-center justify-center' }, 
          [formatTaskType(taskType), getSortIcon(column.getIsSorted())]
        )
      },
      cell: ({ row }) => {
        const shot = row.original
        const status = shot.task_status?.[taskType] || TaskStatus.NOT_STARTED
        const taskId = shot.task_ids?.[taskType]
        
        // Get assigned user ID from task_details
        const taskDetail = shot.task_details?.find(detail => detail.task_type === taskType)
        const assignedUserId = taskDetail?.assigned_user_id || null
        
        return h(EditableTaskStatus, {
          key: `${shot.id}-${taskType}`, // Add stable key to prevent unnecessary re-renders
          shotId: shot.id,
          taskType,
          status,
          taskId,
          projectId: meta.projectId,
          assignedUserId,
          onStatusUpdated: (shotId: number, taskType: string, newStatus: TaskStatus) => {
            meta.onTaskStatusUpdated(shotId, taskType, newStatus)
          },
          onAssignmentUpdated: (shotId: number, taskType: string, userId: number | null) => {
            meta.onTaskAssignmentUpdated?.(shotId, taskType, userId)
          },
        })
      },
      enableSorting: true,
    })
  })



  // Actions column
  columns.push({
    id: 'actions',
    cell: ({ row }) => {
      const shot = row.original
      return h(
        DropdownMenu,
        {},
        {
          default: () => [
            h(
              DropdownMenuTrigger,
              { 
                asChild: true
              },
              {
                default: () =>
                  h(
                    Button,
                    {
                      variant: 'ghost',
                      size: 'icon-sm',
                      onMouseDown: (e: Event) => {
                        e.stopPropagation()
                      },
                      onClick: (e: Event) => {
                        e.stopPropagation()
                        e.preventDefault()
                      }
                    },
                    {
                      default: () => h(MoreHorizontal, { class: 'h-4 w-4' }),
                    }
                  ),
              }
            ),
            h(
              DropdownMenuContent,
              { 
                align: 'end'
              },
              {
                default: () => [
                  h(
                    DropdownMenuItem,
                    { 
                      onClick: (e: Event) => { 
                        e.stopPropagation()
                        e.preventDefault()
                        meta.onEdit(shot) 
                      } 
                    },
                    {
                      default: () => [
                        h(Edit, { class: 'h-4 w-4 mr-2' }),
                        'Edit Shot',
                      ],
                    }
                  ),
                  h(
                    DropdownMenuItem,
                    { 
                      onClick: (e: Event) => { 
                        e.stopPropagation()
                        e.preventDefault()
                        meta.onViewTasks(shot) 
                      } 
                    },
                    {
                      default: () => [
                        h(ListTodo, { class: 'h-4 w-4 mr-2' }),
                        'View Tasks',
                      ],
                    }
                  ),
                  h(DropdownMenuSeparator),
                  h(
                    DropdownMenuItem,
                    {
                      onClick: (e: Event) => { 
                        e.stopPropagation()
                        e.preventDefault()
                        meta.onDelete(shot) 
                      },
                      class: 'text-destructive focus:text-destructive',
                    },
                    {
                      default: () => [
                        h(Trash2, { class: 'h-4 w-4 mr-2' }),
                        'Delete Shot',
                      ],
                    }
                  ),
                ],
              }
            ),
          ],
        }
      )
    },
    enableSorting: false,
    enableHiding: false,
  })

  return columns
}

// Helper functions
function formatTaskType(taskType: string): string {
  return taskType.charAt(0).toUpperCase() + taskType.slice(1)
}

function formatStatus(status: ShotStatus): string {
  return status
    .split('_')
    .map((word) => word.charAt(0).toUpperCase() + word.slice(1))
    .join(' ')
}

function getStatusVariant(status: ShotStatus): 'default' | 'secondary' | 'outline' {
  switch (status) {
    case ShotStatus.NOT_STARTED:
      return 'secondary'
    case ShotStatus.IN_PROGRESS:
      return 'default'
    case ShotStatus.ON_HOLD:
      return 'outline'
    case ShotStatus.COMPLETED:
      return 'default'
    case ShotStatus.APPROVED:
      return 'default'
    default:
      return 'secondary'
  }
}