import { type Table } from "@tanstack/react-table";
import ExcelJS from "exceljs";
import { type RegEvalCriteriaView } from "@/db/schema";
import {
  REG_EVAL_CRITERIA_CATEGORY,
  REG_EVAL_CRITERIA_CATEGORY2,
  REG_EVAL_CRITERIA_ITEM,
} from "@/db/schema";

/**
 * 평가 기준 데이터를 Excel로 내보내기
 */
export async function exportRegEvalCriteriaToExcel<TData extends RegEvalCriteriaView>(
  table: Table<TData>,
  {
    filename = "Regular_Evaluation_Criteria",
    excludeColumns = ["select", "actions"],
    sheetName = "평가 기준",
  }: {
    filename?: string;
    excludeColumns?: string[];
    sheetName?: string;
  } = {}
): Promise<void> {
  // 워크북 생성
  const workbook = new ExcelJS.Workbook();
  workbook.creator = "EVCP System";
  workbook.created = new Date();
  
  // 메인 워크시트 생성
  const worksheet = workbook.addWorksheet(sheetName);

  // 한글 헤더 매핑
  const columnHeaders = [
    { key: "category", header: "평가부문", width: 15 },
    { key: "category2", header: "점수구분", width: 15 },
    { key: "item", header: "항목", width: 15 },
    { key: "classification", header: "구분", width: 20 },
    { key: "range", header: "범위", width: 20 },
    { key: "detail", header: "평가내용", width: 30 },
    { key: "scoreEquipShip", header: "장비-조선 점수", width: 18 },
    { key: "scoreEquipMarine", header: "장비-해양 점수", width: 18 },
    { key: "scoreBulkShip", header: "벌크-조선 점수", width: 18 },
    { key: "scoreBulkMarine", header: "벌크-해양 점수", width: 18 },
    { key: "remarks", header: "비고", width: 20 },
    { key: "id", header: "ID", width: 10 },
    { key: "criteriaId", header: "기준 ID", width: 12 },
    { key: "orderIndex", header: "정렬 순서", width: 12 },
  ].filter(col => !excludeColumns.includes(col.key));

  // 컬럼 설정
  worksheet.columns = columnHeaders;

  // 헤더 스타일 적용
  const headerRow = worksheet.getRow(1);
  headerRow.font = { bold: true };
  headerRow.fill = {
    type: "pattern",
    pattern: "solid",
    fgColor: { argb: "FFCCCCCC" },
  };
  headerRow.alignment = { horizontal: "center", vertical: "middle" };

  // 데이터 행 추가
  const rowModel = table.getRowModel();
  rowModel.rows.forEach((row) => {
    const rowData: Record<string, any> = {};
    columnHeaders.forEach((col) => {
      let value = row.original[col.key as keyof RegEvalCriteriaView];
      
      // 특정 컬럼들에 대해 한글 라벨로 변환
      if (col.key === "category") {
        value = REG_EVAL_CRITERIA_CATEGORY.find(item => item.value === value)?.label || value;
      } else if (col.key === "category2") {
        value = REG_EVAL_CRITERIA_CATEGORY2.find(item => item.value === value)?.label || value;
      } else if (col.key === "item") {
        value = REG_EVAL_CRITERIA_ITEM.find(item => item.value === value)?.label || value;
      }
      
      rowData[col.key] = value || "";
    });
    worksheet.addRow(rowData);
  });

  // 셀 스타일 적용
  worksheet.eachRow((row, rowNumber) => {
    row.eachCell((cell) => {
      cell.border = {
        top: { style: "thin" },
        left: { style: "thin" },
        bottom: { style: "thin" },
        right: { style: "thin" },
      };
      
      // 데이터 행 가운데 정렬
      if (rowNumber > 1) {
        cell.alignment = { horizontal: "center", vertical: "middle" };
      }
    });
  });

  // 유효성 검사 시트 생성 (풀다운용)
  const validationSheet = workbook.addWorksheet("ValidationData");
  validationSheet.state = "hidden";

  // 풀다운 옵션 데이터 추가
  const categoryOptions = REG_EVAL_CRITERIA_CATEGORY.map(item => item.label);
  const category2Options = REG_EVAL_CRITERIA_CATEGORY2.map(item => item.label);
  const itemOptions = REG_EVAL_CRITERIA_ITEM.map(item => item.label);

  validationSheet.getColumn(1).values = ["평가부문", ...categoryOptions];
  validationSheet.getColumn(2).values = ["점수구분", ...category2Options];
  validationSheet.getColumn(3).values = ["항목", ...itemOptions];

  // 메인 시트에 데이터 유효성 검사 적용
  const categoryColIndex = columnHeaders.findIndex(col => col.key === "category") + 1;
  const category2ColIndex = columnHeaders.findIndex(col => col.key === "category2") + 1;
  const itemColIndex = columnHeaders.findIndex(col => col.key === "item") + 1;

  if (categoryColIndex > 0) {
    (worksheet as any).dataValidations.add(`${worksheet.getColumn(categoryColIndex).letter}2:${worksheet.getColumn(categoryColIndex).letter}1000`, {
      type: "list",
      allowBlank: false,
      formulae: [`ValidationData!$A$2:$A$${categoryOptions.length + 1}`],
    });
  }

  if (category2ColIndex > 0) {
    (worksheet as any).dataValidations.add(`${worksheet.getColumn(category2ColIndex).letter}2:${worksheet.getColumn(category2ColIndex).letter}1000`, {
      type: "list",
      allowBlank: false,
      formulae: [`ValidationData!$B$2:$B$${category2Options.length + 1}`],
    });
  }

  if (itemColIndex > 0) {
    (worksheet as any).dataValidations.add(`${worksheet.getColumn(itemColIndex).letter}2:${worksheet.getColumn(itemColIndex).letter}1000`, {
      type: "list",
      allowBlank: false,
      formulae: [`ValidationData!$C$2:$C$${itemOptions.length + 1}`],
    });
  }

  // 파일 다운로드
  const buffer = await workbook.xlsx.writeBuffer();
  const blob = new Blob([buffer], {
    type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
  });
  const url = URL.createObjectURL(blob);
  const link = document.createElement("a");
  link.href = url;
  link.download = `${filename}.xlsx`;
  link.click();
  URL.revokeObjectURL(url);
}

/**
 * 평가 기준 템플릿 다운로드
 */
export async function exportRegEvalCriteriaTemplate(): Promise<void> {
  // 워크북 생성
  const workbook = new ExcelJS.Workbook();
  workbook.creator = "EVCP System";
  workbook.created = new Date();
  
  // 템플릿 워크시트 생성
  const worksheet = workbook.addWorksheet("평가 기준 템플릿");

  // 한글 헤더 설정
  const templateHeaders = [
    { key: "category", header: "평가부문", width: 15 },
    { key: "category2", header: "점수구분", width: 15 },
    { key: "item", header: "항목", width: 15 },
    { key: "classification", header: "구분", width: 20 },
    { key: "range", header: "범위", width: 20 },
    { key: "detail", header: "평가내용", width: 30 },
    { key: "scoreEquipShip", header: "장비-조선 점수", width: 18 },
    { key: "scoreEquipMarine", header: "장비-해양 점수", width: 18 },
    { key: "scoreBulkShip", header: "벌크-조선 점수", width: 18 },
    { key: "scoreBulkMarine", header: "벌크-해양 점수", width: 18 },
    { key: "remarks", header: "비고", width: 20 },
    { key: "orderIndex", header: "정렬 순서", width: 12 },
  ];

  // 컬럼 설정
  worksheet.columns = templateHeaders;

  // 헤더 스타일 적용
  const headerRow = worksheet.getRow(1);
  headerRow.font = { bold: true };
  headerRow.fill = {
    type: "pattern",
    pattern: "solid",
    fgColor: { argb: "FFCCCCCC" },
  };
  headerRow.alignment = { horizontal: "center", vertical: "middle" };

  // 유효성 검사 시트 생성
  const validationSheet = workbook.addWorksheet("ValidationData");
  validationSheet.state = "hidden";

  // 풀다운 옵션 데이터 추가
  const categoryOptions = REG_EVAL_CRITERIA_CATEGORY.map(item => item.label);
  const category2Options = REG_EVAL_CRITERIA_CATEGORY2.map(item => item.label);
  const itemOptions = REG_EVAL_CRITERIA_ITEM.map(item => item.label);

  validationSheet.getColumn(1).values = ["평가부문", ...categoryOptions];
  validationSheet.getColumn(2).values = ["점수구분", ...category2Options];
  validationSheet.getColumn(3).values = ["항목", ...itemOptions];

  // 데이터 유효성 검사 적용
  (worksheet as any).dataValidations.add("A2:A1000", {
    type: "list",
    allowBlank: false,
    formulae: [`ValidationData!$A$2:$A$${categoryOptions.length + 1}`],
  });

  (worksheet as any).dataValidations.add("B2:B1000", {
    type: "list",
    allowBlank: false,
    formulae: [`ValidationData!$B$2:$B$${category2Options.length + 1}`],
  });

  (worksheet as any).dataValidations.add("C2:C1000", {
    type: "list",
    allowBlank: false,
    formulae: [`ValidationData!$C$2:$C$${itemOptions.length + 1}`],
  });

  // 테두리 스타일 적용
  headerRow.eachCell((cell) => {
    cell.border = {
      top: { style: "thin" },
      left: { style: "thin" },
      bottom: { style: "thin" },
      right: { style: "thin" },
    };
  });

  // 샘플 데이터 추가 (2-3줄)
  worksheet.addRow([
    "품질",
    "공정",
    "품질",
    "품질시스템",
    "ISO 9001 인증",
    "품질경영시스템 운영 현황",
    "10",
    "10",
    "10",
    "10",
    "품질시스템 운영",
    "1"
  ]);

  worksheet.addRow([
    "관리자",
    "가격",
    "납기",
    "납기준수",
    "최근 3년",
    "납기준수율 90% 이상",
    "5",
    "5",
    "5",
    "5",
    "납기준수 실적",
    "2"
  ]);

  // 샘플 데이터 행에 테두리 적용
  worksheet.getRow(2).eachCell((cell) => {
    cell.border = {
      top: { style: "thin" },
      left: { style: "thin" },
      bottom: { style: "thin" },
      right: { style: "thin" },
    };
    cell.alignment = { horizontal: "center", vertical: "middle" };
  });

  worksheet.getRow(3).eachCell((cell) => {
    cell.border = {
      top: { style: "thin" },
      left: { style: "thin" },
      bottom: { style: "thin" },
      right: { style: "thin" },
    };
    cell.alignment = { horizontal: "center", vertical: "middle" };
  });

  // 파일 다운로드
  const buffer = await workbook.xlsx.writeBuffer();
  const blob = new Blob([buffer], {
    type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
  });
  const url = URL.createObjectURL(blob);
  const link = document.createElement("a");
  link.href = url;
  link.download = "평가기준_템플릿.xlsx";
  link.click();
  URL.revokeObjectURL(url);
}