"use client"

import * as React from "react"
import { type DataTableRowAction } from "@/types/table"
import { type ColumnDef } from "@tanstack/react-table"
import { Ellipsis, PaperclipIcon } 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 { Vendor, vendors, VendorWithAttachments } from "@/db/schema/vendors"
import { modifyVendor } from "../service"
import { DataTableColumnHeaderSimple } from "@/components/data-table/data-table-column-simple-header"
import { vendorColumnsConfig } from "@/config/vendorColumnsConfig"
import { Separator } from "@/components/ui/separator"
import { AttachmentsButton } from "./attachmentButton"


type NextRouter = ReturnType<typeof useRouter>;


interface GetColumnsProps {
  setRowAction: React.Dispatch<React.SetStateAction<DataTableRowAction<Vendor> | null>>;
  router: NextRouter;
}

/**
 * tanstack table 컬럼 정의 (중첩 헤더 버전)
 */
export function getColumns({ setRowAction, router }: GetColumnsProps): ColumnDef<Vendor>[] {
  // ----------------------------------------------------------------
  // 1) select 컬럼 (체크박스)
  // ----------------------------------------------------------------
  const selectColumn: ColumnDef<Vendor> = {
    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) actions 컬럼 (Dropdown 메뉴)
  // ----------------------------------------------------------------
  const actionsColumn: ColumnDef<Vendor> = {
    id: "actions",
    enableHiding: false,
    cell: function Cell({ row }) {
      const [isUpdatePending, startUpdateTransition] = React.useTransition()

      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">
            <DropdownMenuItem
              onSelect={() => setRowAction({ row, type: "update" })}
            >
              Edit
            </DropdownMenuItem>
            <DropdownMenuItem
              onSelect={() => {
                // 1) 만약 rowAction을 열고 싶다면
                // setRowAction({ row, type: "update" })

                // 2) 자세히 보기 페이지로 클라이언트 라우팅
                router.push(`/evcp/vendors/${row.original.id}/info`);
              }}
            >
              Details
            </DropdownMenuItem>
            <Separator />
            <DropdownMenuSub>
              <DropdownMenuSubTrigger>Status</DropdownMenuSubTrigger>
              <DropdownMenuSubContent>
                <DropdownMenuRadioGroup
                  value={row.original.status}
                  onValueChange={(value) => {
                    startUpdateTransition(() => {
                      toast.promise(
                        modifyVendor({
                          id: String(row.original.id),
                          status: value as Vendor["status"],
                        }),
                        {
                          loading: "Updating...",
                          success: "Label updated",
                          error: (err) => getErrorMessage(err),
                        }
                      )
                    })
                  }}
                >
                  {vendors.status.enumValues.map((status) => (
                    <DropdownMenuRadioItem
                      key={status}
                      value={status}
                      className="capitalize"
                      disabled={isUpdatePending}
                    >
                      {status}
                    </DropdownMenuRadioItem>
                  ))}
                </DropdownMenuRadioGroup>
              </DropdownMenuSubContent>
            </DropdownMenuSub>

          </DropdownMenuContent>
        </DropdownMenu>
      )
    },
    size: 40,
  }

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

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

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

    // child column 정의
    const childCol: ColumnDef<Vendor> = {
      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 === "status") {
          const statusVal = row.original.status
          if (!statusVal) return null
          // const Icon = getStatusIcon(statusVal)
          return (
            <div className="flex w-[6.25rem] items-center">
              {/* <Icon className="mr-2 size-4 text-muted-foreground" aria-hidden="true" /> */}
              <span className="capitalize">{statusVal}</span>
            </div>
          )
        }


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

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


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

    groupMap[groupName].push(childCol)
  })

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

  // 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,
      })
    }
  })

  const attachmentsColumn: ColumnDef<VendorWithAttachments> = {
    id: "attachments",
    header: ({ column }) => (
      <DataTableColumnHeaderSimple column={column} title="" />
    ),
    cell: ({ row }) => {
      // hasAttachments 및 attachmentsList 속성이 추가되었다고 가정
      const hasAttachments = row.original.hasAttachments;
      const attachmentsList = row.original.attachmentsList || [];
      
      if(hasAttachments){

      // 서버 액션을 사용하는 컴포넌트로 교체
      return (
        <AttachmentsButton
          vendorId={row.original.id}
          hasAttachments={hasAttachments}
          attachmentsList={attachmentsList}
        />
      );}{
        return null
      }
    },
    enableSorting: false,
    enableHiding: false,
    minSize: 45,
  };
  

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