"use client"

import * as React from "react"
import { useRouter } from "next/navigation"
import { type Table } from "@tanstack/react-table"
import { Download, FileDown, Plus } from "lucide-react"
import * as ExcelJS from 'exceljs'
import { saveAs } from "file-saver"
import { toast } from "sonner"

import { Button } from "@/components/ui/button"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"

import { ProcurementItem } from "@/db/schema/items"
import { DeleteProcurementItemsDialog } from "./delete-procurement-items-dialog"
import { AddProcurementItemDialog } from "./add-procurement-items-dialog"
import { exportProcurementItemTemplate } from "./procurement-items-excel-template"
import { ImportProcurementItemButton } from "./import-procurement-items-excel-button"

interface ProcurementItemsTableToolbarActionsProps {
  table: Table<ProcurementItem>
}

export function ProcurementItemsTableToolbarActions({
  table
}: ProcurementItemsTableToolbarActionsProps) {
  const [isAddDialogOpen, setIsAddDialogOpen] = React.useState(false)
  const router = useRouter()

  // 가져오기 성공 후 테이블 갱신
  const handleImportSuccess = () => {
    router.refresh()
  }

  // Excel 내보내기 함수
  const exportTableToExcel = async (
    table: Table<ProcurementItem>,
    options: {
      filename: string;
      excludeColumns?: string[];
      sheetName?: string;
    }
  ) => {
    const { filename, excludeColumns = [], sheetName = "품목 목록" } = options;

    // 워크북 생성
    const workbook = new ExcelJS.Workbook();
    workbook.creator = 'Procurement Item Management System';
    workbook.created = new Date();

    // 워크시트 생성
    const worksheet = workbook.addWorksheet(sheetName);

    // 테이블 데이터 가져오기
    const data = table.getFilteredRowModel().rows.map(row => row.original);

    // 테이블 헤더 가져오기
    const headers = table.getAllColumns()
      .filter(column => !excludeColumns.includes(column.id))
      .map(column => ({
        key: column.id,
        header: column.columnDef.meta?.excelHeader || column.id,
      }));

    // 헤더 행 추가
    worksheet.addRow(headers.map(h => h.header));

    // 데이터 행 추가
    data.forEach((item) => {
      const rowData = headers.map(header => {
        const value = item[header.key];

        // 날짜 처리
        if (header.key === 'createdAt' || header.key === 'updatedAt') {
          return value instanceof Date ? value.toLocaleDateString('ko-KR') : value;
        }

        // 활성화 여부 처리
        if (header.key === 'isActive') {
          return value === 'Y' ? '활성' : '비활성';
        }

        return value || '';
      });
      worksheet.addRow(rowData);
    });

    // 컬럼 너비 설정
    worksheet.columns = headers.map(header => ({
      key: header.key,
      width: header.key === 'itemName' || header.key === 'specification' ? 30 : 15
    }));

    // 파일 저장
    const buffer = await workbook.xlsx.writeBuffer();
    const blob = new Blob([buffer], {
      type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
    });
    saveAs(blob, `${filename}_${new Date().toISOString().split('T')[0]}.xlsx`);
  };

  // 테이블 내보내기
  const handleExportToExcel = () => {
    exportTableToExcel(table, {
      filename: 'procurement_items',
      excludeColumns: ['select', 'actions'],
      sheetName: '품목 목록'
    });
    toast.success('엑셀 파일이 다운로드되었습니다.');
  };

  // 템플릿 다운로드
  const handleDownloadTemplate = () => {
    exportProcurementItemTemplate();
    toast.success('엑셀 템플릿이 다운로드되었습니다.');
  };

  return (
    <>
      <div className="flex items-center gap-2">
        {/* 추가 버튼 */}
        <Button
          variant="default"
          size="sm"
          onClick={() => setIsAddDialogOpen(true)}
        >
          <Plus className="mr-2 h-4 w-4" />
          품목 추가
        </Button>

        {/* 엑셀 내보내기 메뉴 */}
        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <Button variant="outline" size="sm">
              <Download className="mr-2 h-4 w-4" />
              내보내기
            </Button>
          </DropdownMenuTrigger>
          <DropdownMenuContent align="end">
            <DropdownMenuItem onClick={handleExportToExcel}>
              <FileDown className="mr-2 h-4 w-4" />
              현재 목록 내보내기
            </DropdownMenuItem>
            <DropdownMenuItem onClick={handleDownloadTemplate}>
              <FileDown className="mr-2 h-4 w-4" />
              템플릿 다운로드
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>

        {/* 엑셀 가져오기 버튼 */}
        <ImportProcurementItemButton onImportSuccess={handleImportSuccess} />

        {/* 선택된 항목들 삭제 버튼 */}
        {table.getFilteredSelectedRowModel().rows.length > 0 && (
          <DeleteProcurementItemsDialog
            procurementItems={table.getFilteredSelectedRowModel().rows.map(row => row.original)}
            showTrigger={true}
            onSuccess={() => {
              table.toggleAllRowsSelected(false)
              router.refresh()
            }}
          />
        )}
      </div>

      <AddProcurementItemDialog
        open={isAddDialogOpen}
        onOpenChange={setIsAddDialogOpen}
        onSuccess={() => {
          setIsAddDialogOpen(false)
          router.refresh()
        }}
      />
    </>
  )
}