"use client"

import * as React from "react"
import { type DataTableRowAction } from "@/types/table"
import { type ColumnDef } from "@tanstack/react-table"
import { Download, MessageSquare, Upload } 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 { DataTableColumnHeaderSimple } from "@/components/data-table/data-table-column-simple-header"
import { useRouter } from "next/navigation"

import {
  tbeVendorColumnsConfig,
  VendorTbeColumnConfig,
  vendorTbeColumnsConfig,
  TbeVendorFields,
} from "@/config/vendorTbeColumnsConfig"

type NextRouter = ReturnType<typeof useRouter>

interface GetColumnsProps {
  setRowAction: React.Dispatch<
    React.SetStateAction<DataTableRowAction<TbeVendorFields> | null>
  >
  router: NextRouter
  openCommentSheet: (vendorId: number) => void
  handleDownloadTbeTemplate: (tbeId: number, vendorId: number, rfqId: number) => void
  handleUploadTbeResponse: (tbeId: number, vendorId: number, rfqId: number, vendorResponseId:number) => void
}

/**
 * tanstack table 컬럼 정의 (중첩 헤더 버전)
 */
export function getColumns({
  setRowAction,
  router,
  openCommentSheet,
  handleDownloadTbeTemplate,
  handleUploadTbeResponse,
}: GetColumnsProps): ColumnDef<TbeVendorFields>[] {
  // ----------------------------------------------------------------
  // 1) Select 컬럼 (체크박스)
  // ----------------------------------------------------------------
  const selectColumn: ColumnDef<TbeVendorFields> = {
    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,
  }

  // ----------------------------------------------------------------
  // 2) 그룹화(Nested) 컬럼 구성
  // ----------------------------------------------------------------
  const groupMap: Record<string, ColumnDef<TbeVendorFields>[]> = {}

  tbeVendorColumnsConfig.forEach((cfg) => {
    const groupName = cfg.group || "_noGroup"
    if (!groupMap[groupName]) {
      groupMap[groupName] = []
    }

    // childCol: ColumnDef<TbeVendorFields>
    const childCol: ColumnDef<TbeVendorFields> = {
      accessorKey: cfg.id,
      enableResizing: true,
      header: ({ column }) => (
        <DataTableColumnHeaderSimple column={column} title={cfg.label} />
      ),
      meta: {
        excelHeader: cfg.excelHeader,
        group: cfg.group,
        type: cfg.type,
      },
      maxSize: 120,
      // 셀 렌더링
      cell: ({ row, getValue }) => {
        // 1) 필드값 가져오기
        const val = getValue()

        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>
          )
        }

        // 예) TBE Updated (날짜)
        if (cfg.id === "tbeUpdated") {
          const dateVal = val as Date | undefined
          if (!dateVal) return null
          return formatDate(dateVal)
        }

        // 그 외 필드는 기본 값 표시
        return val ?? ""
      },
    }

    groupMap[groupName].push(childCol)
  })

  // groupMap → nestedColumns
  const nestedColumns: ColumnDef<TbeVendorFields>[] = []
  Object.entries(groupMap).forEach(([groupName, colDefs]) => {
    if (groupName === "_noGroup") {
      nestedColumns.push(...colDefs)
    } else {
      nestedColumns.push({
        id: groupName,
        header: groupName,
        columns: colDefs,
      })
    }
  })

  // ----------------------------------------------------------------
  // 3) Comments 컬럼
  // ----------------------------------------------------------------
  const commentsColumn: ColumnDef<TbeVendorFields> = {
    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(vendor.tbeId ?? 0)
      }

      return (
        <div>
          <Button
            variant="ghost"
            size="sm"
            className="h-8 w-8 p-0 group relative"
            onClick={handleClick}
            aria-label={commCount > 0 ? `View ${commCount} comments` : "Add comment"}
          >
            <div className="flex items-center justify-center relative">
              <MessageSquare className="h-4 w-4 text-muted-foreground group-hover:text-primary transition-colors" />
            </div>
            {commCount > 0 && <span className="absolute -top-1 -right-1 inline-flex h-2 w-2 rounded-full bg-red-500"></span>}
            <span className="sr-only">{commCount > 0 ? `${commCount} Comments` : "Add Comment"}</span>
          </Button>
        </div>
      )
    },
    enableSorting: false,
    maxSize: 80
  }

  // ----------------------------------------------------------------
  // 4) TBE 다운로드 컬럼 - 템플릿 다운로드 기능
  // ----------------------------------------------------------------
  const tbeDownloadColumn: ColumnDef<TbeVendorFields> = {
    id: "tbeDownload",
    header: ({ column }) => (
      <DataTableColumnHeaderSimple column={column} title="TBE Sheets" />
    ),
    cell: ({ row }) => {
      const vendor = row.original
      const tbeId = vendor.tbeId
      const vendorId = vendor.vendorId
      const rfqId = vendor.rfqId
      const templateFileCount = vendor.templateFileCount || 0

      if (!tbeId || !vendorId || !rfqId) {
        return <div className="text-center text-muted-foreground">-</div>
      }

      // 템플릿 파일이 없으면 다운로드 버튼 비활성화
      const isDisabled = templateFileCount <= 0

      return (
        <Button
          variant="ghost"
          size="sm"
          className="relative h-8 w-8 p-0 group"
          onClick={
            isDisabled
              ? undefined
              : () => handleDownloadTbeTemplate(tbeId, vendorId, rfqId)
          }
          aria-label={
            templateFileCount > 0
              ? `TBE 템플릿 다운로드 (${templateFileCount}개)`
              : "다운로드할 파일 없음"
          }
          disabled={isDisabled}
        >
          <Download className="h-4 w-4 text-muted-foreground group-hover:text-primary transition-colors" />

          {/* 파일이 1개 이상인 경우 뱃지로 개수 표시 */}
          {templateFileCount > 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"
            >
              {templateFileCount}
            </Badge>
          )}

          <span className="sr-only">
            {templateFileCount > 0
              ? `TBE 템플릿 다운로드 (${templateFileCount}개)`
              : "다운로드할 파일 없음"}
          </span>
        </Button>
      )
    },
    enableSorting: false,
    maxSize: 80,
  }
  // ----------------------------------------------------------------
  // 5) TBE 업로드 컬럼 - 응답 업로드 기능
  // ----------------------------------------------------------------
  const tbeUploadColumn: ColumnDef<TbeVendorFields> = {
    id: "tbeUpload",
    header: ({ column }) => (
      <DataTableColumnHeaderSimple column={column} title="Upload Response" />
    ),
    cell: ({ row }) => {
      const vendor = row.original
      const tbeId = vendor.tbeId
      const vendorId = vendor.vendorId
      const rfqId = vendor.rfqId
      const vendorResponseId = vendor.vendorResponseId || 0
      const status = vendor.rfqVendorStatus
      const hasResponse = vendor.hasResponse || false


      if (!tbeId || !vendorId || !rfqId || status === "REJECTED") {
        return <div className="text-center text-muted-foreground">-</div>
      }

      return (
        <div >
          <Button
            variant="ghost"
            size="sm"
            className="h-8 w-8 p-0 group relative"
            onClick={() => handleUploadTbeResponse(tbeId, vendorId, rfqId, vendorResponseId)}
            aria-label={hasResponse ? "TBE 응답 확인" : "TBE 응답 업로드"}
          >
            <div className="flex items-center justify-center relative">
              <Upload className="h-4 w-4 text-muted-foreground group-hover:text-primary transition-colors" />
            </div>
            {hasResponse && (
              <span className="absolute -top-1 -right-1 inline-flex h-2 w-2 rounded-full" style={{ backgroundColor: '#10B981' }}></span>
            )}
            <span className="sr-only">
              {"TBE 응답 업로드"}
            </span>
          </Button>
        </div>
      )
    },
    enableSorting: false,
    maxSize: 80
  }

  // ----------------------------------------------------------------
  // 6) 최종 컬럼 배열
  // ----------------------------------------------------------------
  return [
    selectColumn,
    ...nestedColumns,
    commentsColumn,
    tbeDownloadColumn,
    tbeUploadColumn,
  ]
}