"use client"

import * as React from "react"
import type { ColumnDef } from "@tanstack/react-table"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"
import { DataTableColumnHeaderSimple } from "@/components/data-table/data-table-column-simple-header"
import type { DataTableRowAction } from "@/types/table"
import type { PageInformation } from "@/db/schema/information"
import { formatDate } from "@/lib/utils"
import { Ellipsis, FileText, Download } from "lucide-react"
import { informationColumnsConfig } from "@/config/informationColumnsConfig"

interface GetColumnsProps {
  setRowAction: React.Dispatch<React.SetStateAction<DataTableRowAction<PageInformation> | null>>
}

/**
 * tanstack table 컬럼 정의 (중첩 헤더 버전)
 */
export function getInformationColumns({ setRowAction }: GetColumnsProps): ColumnDef<PageInformation>[] {
  // // ----------------------------------------------------------------
  // // 1) Select 컬럼 (체크박스)
  // // ----------------------------------------------------------------
  // const selectColumn: ColumnDef<PageInformation> = {
  //   id: "select",
  //   header: ({ table }) => (
  //     <Checkbox
  //       checked={
  //         table.getIsAllPageRowsSelected() ||
  //         (table.getIsSomePageRowsSelected() && "indeterminate")
  //       }
  //       onCheckedChange={(value) => table.toggleAllPageRowsSelected(!!value)}
  //       aria-label="Select all"
  //       className="translate-y-0.5"
  //     />
  //   ),
  //   cell: ({ row }) => (
  //     <Checkbox
  //       checked={row.getIsSelected()}
  //       onCheckedChange={(value) => row.toggleSelected(!!value)}
  //       aria-label="Select row"
  //       className="translate-y-0.5"
  //     />
  //   ),
  //   enableSorting: false,
  //   enableHiding: false,
  // }

  // ----------------------------------------------------------------
  // 2) 일반 컬럼들을 "그룹"별로 묶어 중첩 columns 생성
  // ----------------------------------------------------------------
  const groupMap: Record<string, ColumnDef<PageInformation>[]> = {}

  informationColumnsConfig.forEach((cfg) => {
    // 만약 group가 없으면 "_noGroup" 처리
    const groupName = cfg.group || "_noGroup"

    if (!groupMap[groupName]) {
      groupMap[groupName] = []
    }

    // child column 정의
    const childCol: ColumnDef<PageInformation> = {
      accessorKey: cfg.id,
      enableResizing: cfg.id === "description" || cfg.id === "noticeContent" ? false : true,
      size: cfg.id === "description" || cfg.id === "noticeContent" ? 200 : undefined,
      minSize: cfg.id === "description" || cfg.id === "noticeContent" ? 200 : undefined,
      maxSize: cfg.id === "description" || cfg.id === "noticeContent" ? 200 : undefined,
      header: ({ column }) => (
        <DataTableColumnHeaderSimple column={column} title={cfg.label} />
      ),
      meta: {
        excelHeader: cfg.excelHeader,
        group: cfg.group,
        type: cfg.type,
      },
      cell: ({ row }) => {
        const value = row.getValue(cfg.id)
        
        if (cfg.id === "pageCode") {
          return <div className=" text-sm">{value as string}</div>
        }
        
        if (cfg.id === "pageName") {
          return <div className="max-w-4 truncate font-medium">{value as string}</div>
        }
        
        if (cfg.id === "title") {
          return <div className="max-w-4 truncate">{value as string}</div>
        }
        
        if (cfg.id === "description") {
          return (
            <div className="truncate text-muted-foreground" style={{ width: '200px', maxWidth: '200px' }}>
              {value as string}
            </div>
          )
        }
        
        if (cfg.id === "noticeTitle") {
          const noticeTitle = value as string
          if (!noticeTitle) {
            return <span className="text-muted-foreground">-</span>
          }
          return <div className="max-w-xs truncate">{noticeTitle}</div>
        }
        
        if (cfg.id === "noticeContent") {
          const noticeContent = value as string
          if (!noticeContent) {
            return <span className="text-muted-foreground">-</span>
          }
          return (
            <div className="truncate text-muted-foreground" style={{ width: '200px', maxWidth: '200px' }}>
              {noticeContent}
            </div>
          )
        }
        
        if (cfg.id === "attachmentFileName") {
          const fileName = value as string
          if (!fileName) {
            return <span className="text-muted-foreground">-</span>
          }
          return (
            <div className="flex items-center gap-1">
              <FileText className="h-3 w-3" />
              <span className="text-sm truncate max-w-32" title={fileName}>
                {fileName}
              </span>
            </div>
          )
        }
        
        if (cfg.id === "isActive") {
          return (
            <Badge variant={value ? "default" : "secondary"}>
              {value ? "활성" : "비활성"}
            </Badge>
          )
        }
        
        if (cfg.id === "createdAt" || cfg.id === "updatedAt") {
          const dateVal = value as Date
          return formatDate(dateVal)
        }

        return value ?? ""
      },
    }

    groupMap[groupName].push(childCol)
  })

  // ----------------------------------------------------------------
  // 3) groupMap에서 실제 상위 컬럼(그룹)을 만들기
  // ----------------------------------------------------------------
  const nestedColumns: ColumnDef<PageInformation>[] = []

  // 순서를 고정하고 싶다면 group 순서를 미리 정의하거나 sort해야 함
  // 여기서는 그냥 Object.entries 순서
  Object.entries(groupMap).forEach(([groupName, colDefs]) => {
    if (groupName === "_noGroup") {
      // 그룹 없음 → 그냥 최상위 레벨 컬럼
      nestedColumns.push(...colDefs)
    } else {
      // 상위 컬럼
      nestedColumns.push({
        id: groupName,
        header: groupName, // "기본 정보", "공지사항" 등
        columns: colDefs,
      })
    }
  })

  // ----------------------------------------------------------------
  // 4) Actions 컬럼
  // ----------------------------------------------------------------
  const actionsColumn: ColumnDef<PageInformation> = {
    id: "actions",
    cell: ({ row }) => (
      <DropdownMenu>
        <DropdownMenuTrigger asChild>
          <Button
            aria-label="Open menu"
            variant="ghost"
            className="flex size-8 p-0 data-[state=open]:bg-muted"
          >
            <Ellipsis className="size-4" aria-hidden="true" />
          </Button>
        </DropdownMenuTrigger>
        <DropdownMenuContent align="end" className="w-40">
          <DropdownMenuItem
            onSelect={() => setRowAction({ row, type: "update" })}
          >
            수정
          </DropdownMenuItem>
          {row.original.attachmentFileName && (
            <>
              <DropdownMenuSeparator />
              <DropdownMenuItem
                onSelect={() => {
                  if (row.original.attachmentFilePath) {
                    const link = document.createElement('a')
                    link.href = row.original.attachmentFilePath
                    link.download = row.original.attachmentFileName || ''
                    document.body.appendChild(link)
                    link.click()
                    document.body.removeChild(link)
                  }
                }}
              >
                <Download className="mr-2 h-4 w-4" />
                다운로드
              </DropdownMenuItem>
            </>
          )}
          <DropdownMenuSeparator />
          <DropdownMenuItem
            onSelect={() => setRowAction({ row, type: "delete" })}
            className="text-destructive"
          >
            삭제
          </DropdownMenuItem>
        </DropdownMenuContent>
      </DropdownMenu>
    ),
    enableSorting: false,
    enableHiding: false,
  }

  // ----------------------------------------------------------------
  // 5) 최종 컬럼 배열: select, nestedColumns, actions
  // ----------------------------------------------------------------
  return [
    // selectColumn,
    ...nestedColumns,
    actionsColumn,
  ]
}