import ExcelJS from "exceljs";

interface TrainReportData {
  train_id: string;
  arrive_at: string;
  leave_at: string | null;
  train_data: { carriage_number: string }[];
  appearance_data: {
    carriage_number: string;
    carriage_type: string;
    occurrence_time: string;
    warning_type: string;
    fault_type: string;
    defect_image: string;
  }[];
}

const formatDateTime = (dateTimeStr: string) => {
  const date = new Date(dateTimeStr);
  return date.toLocaleString("zh-CN", {
    year: "numeric",
    month: "2-digit",
    day: "2-digit",
    hour: "2-digit",
    minute: "2-digit",
    second: "2-digit",
    hour12: false,
  });
};

// 使用您指定的图片URL
const DEFAULT_IMAGE_URL =
  "https://img1.baidu.com/it/u=967792105,51180745&fm=253&fmt=auto?w=1200&h=800";
const convertImageToBase64 = async (url: string) => {
  try {
    const response = await fetch(url);
    const blob = await response.blob();
    return new Promise<string>((resolve, reject) => {
      const reader = new FileReader();
      reader.onloadend = () => resolve(reader.result as string);
      reader.onerror = reject;
      reader.readAsDataURL(blob);
    });
  } catch (error) {
    console.error("Error loading image:", error);
    return null;
  }
};
const getImageDimensions = (
  url: string
): Promise<{ width: number; height: number }> => {
  return new Promise((resolve) => {
    const img = new Image();
    const timer = setTimeout(() => {
      resolve({ width: 80, height: 60 }); // 默认尺寸
    }, 3000);

    img.crossOrigin = "Anonymous";
    img.onload = () => {
      clearTimeout(timer);
      resolve({ width: img.width, height: img.height });
    };

    img.onerror = () => {
      clearTimeout(timer);
      resolve({ width: 80, height: 60 });
    };

    img.src = url;
  });
};

// 下载图片并转换为ArrayBuffer
const downloadImage = async (url: string): Promise<ExcelJS.Image | null> => {
  try {
    const finalUrl = url || DEFAULT_IMAGE_URL;
    let response: Response;

    try {
      response = await fetch(finalUrl);
      if (!response.ok) throw new Error("直接下载失败");
    } catch (directError) {
      // 尝试使用CORS代理
      try {
        const proxyUrl = `https://corsproxy.io/?${encodeURIComponent(
          finalUrl
        )}`;
        response = await fetch(proxyUrl);
        if (!response.ok) throw new Error("代理下载失败");
      } catch (proxyError) {
        console.error("图片下载失败:", proxyError);
        return null;
      }
    }

    const arrayBuffer = await response.arrayBuffer();
    const extension = finalUrl.split(".").pop()?.toLowerCase() || "jpeg";
    const { width, height } = await getImageDimensions(finalUrl);

    // 计算缩放比例（保持宽高比）
    const maxWidth = 80;
    const maxHeight = 60;
    const scale = Math.min(maxWidth / width, maxHeight / height, 1);

    return {
      buffer: arrayBuffer, // 直接使用ArrayBuffer
      extension: extension === "png" ? "png" : "jpeg",
      width: width * scale,
      height: height * scale,
    };
  } catch (error) {
    console.error("图片处理失败:", error);
    return null;
  }
};

// 像素转换为Excel的EMU单位 (Excel使用EMU作为度量单位)
const pixelsToEMU = (pixels: number) => Math.round(pixels * 9525);

export const exportTrainReport = async (data: TrainReportData) => {
  const workbook = new ExcelJS.Workbook();
  workbook.creator = "Railway Inspection System";
  workbook.created = new Date();

  // 1. 创建"整车信息"工作表 (无表头行)
  const trainSheet = workbook.addWorksheet("整车信息");
  trainSheet.getColumn(1).width = 20;
  trainSheet.getColumn(2).width = 30;

  // 直接添加数据行
  const trainInfoData = [
    { key: "车头编号", value: data.train_id },
    { key: "进场时间", value: formatDateTime(data.arrive_at) },
    {
      key: "出场时间",
      value: data.leave_at ? formatDateTime(data.leave_at) : "未出场",
    },
    { key: "车厢列表", value: "" },
  ];

  trainInfoData.forEach((info, index) => {
    const row = index + 1;
    trainSheet.getCell(`A${row}`).value = info.key;
    trainSheet.getCell(`B${row}`).value = info.value;

    // 设置第一列加粗
    trainSheet.getCell(`A${row}`).font = { bold: true };

    // 设置第二列加粗（除车厢列表行）
    if (row < 4) {
      trainSheet.getCell(`B${row}`).font = { bold: true };
    }
  });

  // 添加车厢列表
  const startRow = trainInfoData.length + 1;
  data.train_data.forEach((carriage, index) => {
    const row = startRow + index;
    trainSheet.getCell(`A${row}`).value = `车厢 ${index + 1}`;
    trainSheet.getCell(`B${row}`).value = carriage.carriage_number;
  });

  // 2. 创建"车身缺陷记录"工作表
  const defectSheet = workbook.addWorksheet("车身缺陷记录");

  // 修改列定义
  defectSheet.columns = [
    { header: "车厢号", key: "carriage_number", width: 15 },
    // { header: "车型", key: "carriage_type", width: 20 },
    { header: "发生时间", key: "occurrence_time", width: 20 },
    { header: "告警类型", key: "warning_type", width: 15 },
    { header: "缺陷类型", key: "fault_type", width: 15 },
    { header: "缺陷图片", key: "thumbnail", width: 15 }, // 缩略图列
    // { header: "查看原图", key: "defect_image", width: 15 }, // 原图链接列
  ];

  // 设置表头样式
  defectSheet.getRow(1).eachCell((cell) => {
    cell.font = { bold: true };
    cell.fill = {
      type: "pattern",
      pattern: "solid",
      fgColor: { argb: "FFDDEBF7" }, // 浅蓝色背景
    };
    cell.border = {
      top: { style: "thin" },
      left: { style: "thin" },
      bottom: { style: "thin" },
      right: { style: "thin" },
    };
  });

  // 设置所有行高（60像素≈45磅）
  defectSheet.properties.defaultRowHeight = 45;

  // 添加所有缺陷记录
  for (let i = 0; i < data.appearance_data.length; i++) {
    const item = data.appearance_data[i];
    const rowIndex = i + 2; // 从第二行开始（第一行是表头）

    // 添加文本数据
    defectSheet.addRow({
      carriage_number: item.carriage_number,
      carriage_type: item.carriage_type,
      occurrence_time: formatDateTime(item.occurrence_time),
      warning_type: item.warning_type,
      fault_type: item.fault_type,
    });

    // 使用指定图片URL
    const imageUrl = item.defect_image || DEFAULT_IMAGE_URL;

    try {
      // 下载图片
      // const image = await downloadImage(imageUrl);
      // console.log("图片下载成功", image);
      const base64Image = await convertImageToBase64(imageUrl);
      if (base64Image) {
        const imageId = workbook.addImage({
          base64: base64Image,
          extension: "png", // Adjust extension if needed (jpeg, etc.)
        });

        // TODO : 调整图片大小和位置 (根据需要调整)
        // // 计算缩放比例和显示尺寸
        // const maxSize = 30; // 最大边长30像素
        // const scale = Math.min(maxSize / image.width, maxSize / image.height);
        // const displayWidth = image.width * scale;
        // const displayHeight = image.height * scale;

        // // 列宽（像素）和行高（像素）
        // const colWidthPixels = 105; //   15字符 * 7
        // const rowHeightPixels = 60; //   45磅 * (96/72) = 60像素

        // // 计算偏移量（居中）
        // const offsetXPixels = (colWidthPixels - displayWidth) / 2;
        // const offsetYPixels = (rowHeightPixels - displayHeight) / 2;

        // // 转换为EMU
        // const offsetXEMU = pixelsToEMU(offsetXPixels);
        // const offsetYEMU = pixelsToEMU(offsetYPixels);
        // const widthEMU = pixelsToEMU(displayWidth);
        // const heightEMU = pixelsToEMU(displayHeight);
        defectSheet.addImage(imageId, {
          tl: { col: defectSheet.columns.length - 1, row: rowIndex - 1 }, // F列是第5列（0-based）
          // br: { col: 6, row: rowIndex },
          ext: {
            width: 80,
            height: 45,
          },
          editAs: "oneCell",
        });

       
      }
    } catch (error) {
      console.error(`图片添加失败 (行 ${rowIndex}):`, error);
      const errorCell = defectSheet.getCell(`E${rowIndex}`);
      errorCell.value = "图片加载失败";
      errorCell.font = {
        color: { argb: "FFFF0000" }, // 红色
        italic: true,
      };
    }
  }

  // 3. 生成Excel文件
  const buffer = await workbook.xlsx.writeBuffer();
  try {
    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 = "车辆信息.xlsx";
    link.click();
    URL.revokeObjectURL(url);
  } catch (error) {
    console.error("导出 Excel 文件时出错:", error);
  }
};
// ... formatDateTime 函数保持不变 ...

export const useTrainSaveToExcel = (data) => {
  // 模拟数据 (实际应用中应通过API获取)
  const reportData = {
    train_id: "DF4-1234",
    arrive_at: "2023-06-15 08:30:00",
    leave_at: "2023-06-15 16:45:22",
    train_data: [
      { carriage_number: "CK-1001" },
      { carriage_number: "CK-1002" },
      { carriage_number: "CK-1003" },
    ],
    appearance_data: [
      {
        carriage_number: "CK-1001",
        carriage_type: "C80型运煤敞车",
        occurrence_time: "2023-06-15 09:15:34",
        warning_type: "AI智能识别告警",
        fault_type: "车体变形",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
      {
        carriage_number: "CK-1002",
        carriage_type: "P70型棚车",
        occurrence_time: "2023-06-15 10:22:18",
        warning_type: "人工巡检报告",
        fault_type: "油漆剥落",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
       {
        carriage_number: "CK-1001",
        carriage_type: "C80型运煤敞车",
        occurrence_time: "2023-06-15 09:15:34",
        warning_type: "AI智能识别告警",
        fault_type: "车体变形",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
      {
        carriage_number: "CK-1002",
        carriage_type: "P70型棚车",
        occurrence_time: "2023-06-15 10:22:18",
        warning_type: "人工巡检报告",
        fault_type: "油漆剥落",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
       {
        carriage_number: "CK-1001",
        carriage_type: "C80型运煤敞车",
        occurrence_time: "2023-06-15 09:15:34",
        warning_type: "AI智能识别告警",
        fault_type: "车体变形",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
      {
        carriage_number: "CK-1002",
        carriage_type: "P70型棚车",
        occurrence_time: "2023-06-15 10:22:18",
        warning_type: "人工巡检报告",
        fault_type: "油漆剥落",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
       {
        carriage_number: "CK-1001",
        carriage_type: "C80型运煤敞车",
        occurrence_time: "2023-06-15 09:15:34",
        warning_type: "AI智能识别告警",
        fault_type: "车体变形",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
      {
        carriage_number: "CK-1002",
        carriage_type: "P70型棚车",
        occurrence_time: "2023-06-15 10:22:18",
        warning_type: "人工巡检报告",
        fault_type: "油漆剥落",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
       {
        carriage_number: "CK-1001",
        carriage_type: "C80型运煤敞车",
        occurrence_time: "2023-06-15 09:15:34",
        warning_type: "AI智能识别告警",
        fault_type: "车体变形",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
      {
        carriage_number: "CK-1002",
        carriage_type: "P70型棚车",
        occurrence_time: "2023-06-15 10:22:18",
        warning_type: "人工巡检报告",
        fault_type: "油漆剥落",
        defect_image:
          "http://192.168.10.14:8123/sftp/2025-07-01/20250701_131010.jpg",
      },
    ],
  };
  return {
    saveToExcel: () => exportTrainReport(reportData),
  };
};