"use client"

import * as React from "react"
import { type DataTableRowAction } from "@/types/table"
import { type ColumnDef } from "@tanstack/react-table"
import { Ellipsis, MessageSquare } from "lucide-react"
import { toast } from "sonner"

import { getErrorMessage } from "@/lib/handle-error"
import { formatDate } from "@/lib/utils"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"
import { Checkbox } from "@/components/ui/checkbox"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuRadioGroup,
  DropdownMenuRadioItem,
  DropdownMenuSeparator,
  DropdownMenuShortcut,
  DropdownMenuSub,
  DropdownMenuSubContent,
  DropdownMenuSubTrigger,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"
import { DataTableColumnHeader } from "@/components/data-table/data-table-column-header"
import { useRouter } from "next/navigation"

import { vendors } from "@/db/schema/vendors"
import { DataTableColumnHeaderSimple } from "@/components/data-table/data-table-column-simple-header"
import { vendorColumnsConfig } from "@/config/vendorColumnsConfig"
import { Separator } from "@/components/ui/separator"
import { MatchedVendorRow, vendorRfqColumnsConfig } from "@/config/vendorRfbColumnsConfig"


type NextRouter = ReturnType<typeof useRouter>;


interface GetColumnsProps {
  setRowAction: React.Dispatch<React.SetStateAction<DataTableRowAction<MatchedVendorRow> | null>>;
  router: NextRouter;
  openCommentSheet: (rfqId: number) => void;

}

/**
 * tanstack table 컬럼 정의 (중첩 헤더 버전)
 */
export function getColumns({ setRowAction, router, openCommentSheet }: GetColumnsProps): ColumnDef<MatchedVendorRow>[] {
  // ----------------------------------------------------------------
  // 1) select 컬럼 (체크박스)
  // ----------------------------------------------------------------
  const selectColumn: ColumnDef<MatchedVendorRow> = {
    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"
      />
    ),
    size: 40,
    enableSorting: false,
    enableHiding: false,
  }

  // ----------------------------------------------------------------
  // 3) 일반 컬럼들을 "그룹"별로 묶어 중첩 columns 생성
  // ----------------------------------------------------------------
  // 3-1) groupMap: { [groupName]: ColumnDef<MatchedVendorRow>[] }
  const groupMap: Record<string, ColumnDef<MatchedVendorRow>[]> = {}

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

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

    // child column 정의
    const childCol: ColumnDef<MatchedVendorRow> = {
      accessorKey: cfg.id,
      enableResizing: true,
      header: ({ column }) => (
        <DataTableColumnHeaderSimple column={column} title={cfg.label} />
      ),
      meta: {
        excelHeader: cfg.excelHeader,
        group: cfg.group,
        type: cfg.type,
      },
      cell: ({ row, cell }) => {


        if (cfg.id === "vendorStatus") {
          const statusVal = row.original.vendorStatus
          if (!statusVal) return null
          // const Icon = getStatusIcon(statusVal)
          return (
            <Badge variant="outline">
              {statusVal}
            </Badge>
          )
        }

        if (cfg.id === "rfqVendorStatus") {
          const statusVal = row.original.rfqVendorStatus
          if (!statusVal) return null
          // const Icon = getStatusIcon(statusVal)
          const variant = statusVal === "INVITED" ? "default" : statusVal === "REJECTED" ? "destructive" : statusVal === "ACCEPTED" ? "secondary" : "outline"
          return (
            <Badge variant={variant}>
              {statusVal}
            </Badge>
          )
        }


        if (cfg.id === "rfqVendorUpdated") {
          const dateVal = cell.getValue() as Date
          if (!dateVal) return null
          return formatDate(dateVal)
        }


        // code etc...
        return row.getValue(cfg.id) ?? ""
      },
    }

    groupMap[groupName].push(childCol)
  })

  const commentsColumn: ColumnDef<MatchedVendorRow> = {
    id: "comments",
    header: ({ column }) => (
      <DataTableColumnHeaderSimple column={column} title="Comments" />
    ),
    cell: ({ row }) => {
      const vendor = row.original
      const commCount = vendor.comments?.length ?? 0
      
      function handleClick() {
        // rowAction + openCommentSheet
        setRowAction({ row, type: "comments" })
        openCommentSheet(Number(vendor.id) ?? 0)
      }
      
      return (
        <Button
          variant="ghost"
          size="sm"
          className="relative h-8 w-8 p-0 group"
          onClick={handleClick}
          aria-label={
            commCount > 0 ? `View ${commCount} comments` : "No comments"
          }
        >
          <MessageSquare className="h-4 w-4 text-muted-foreground group-hover:text-primary transition-colors" />
          {commCount > 0 && (
            <Badge
              variant="secondary"
              className="pointer-events-none absolute -top-1 -right-1 h-4 min-w-[1rem] p-0 text-[0.625rem] leading-none flex items-center justify-center"
            >
              {commCount}
            </Badge>
          )}
          <span className="sr-only">
            {commCount > 0 ? `${commCount} Comments` : "No Comments"}
          </span>
        </Button>
      )
    },
    enableSorting: false,
    maxSize: 80
  }
  
  const actionsColumn: ColumnDef<MatchedVendorRow> = {
    id: "actions",
    cell: ({ row }) => {
      const rfq = row.original
      const status = row.original.rfqVendorStatus
      const isDisabled = !status || status === 'INVITED' || status === 'ACCEPTED'

      if (isDisabled) {
        return (
          <div className="relative group">
            <Button
              aria-label="Actions disabled"
              variant="ghost"
              className="flex size-8 p-0 opacity-50 cursor-not-allowed"
              disabled
            >
              <Ellipsis className="size-4" aria-hidden="true" />
            </Button>
            {/* Tooltip explaining why it's disabled */}
            <div className="absolute hidden group-hover:block right-0 -bottom-8 bg-popover text-popover-foreground text-xs p-2 rounded shadow-md whitespace-nowrap z-50">
              초대 상태에서는 사용할 수 없습니다
            </div>
          </div>
        )
      }
      

      return (
        <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">
            {/* 기존 기능: status가 INVITED일 때만 표시 */}
            {(!status || status === 'INVITED') && (
              <DropdownMenuItem onSelect={() => setRowAction({ row, type: "invite" })}>
                발행하기
              </DropdownMenuItem>
            )}
          </DropdownMenuContent>
        </DropdownMenu>
      )
    },
    size: 40,
    enableSorting: false,
    enableHiding: false,
  }

  // ----------------------------------------------------------------
  // 3-2) groupMap에서 실제 상위 컬럼(그룹)을 만들기
  // ----------------------------------------------------------------
  const nestedColumns: ColumnDef<MatchedVendorRow>[] = []

  // 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, // "Basic Info", "Metadata" 등
        columns: colDefs,
      })
    }
  })

  // ----------------------------------------------------------------
  // 4) 최종 컬럼 배열: select, nestedColumns, comments, actions
  // ----------------------------------------------------------------
  return [
    selectColumn,
    ...nestedColumns,
    commentsColumn,
    actionsColumn
  ]
}