import { ElMessage } from "element-plus";
import dayjs from "dayjs";
import {getFileUrl} from "../../utils/index.js";

/**
 * @param {string} url - 请求的 API 地址（GET）
 * @param {Object} [option] - 配置项（可选）
 * @param {string} [option.name] - 下载文件的自定义文件名（不含后缀），默认为当前时间戳
 * @param {string} [option.type] - Blob 对象的 MIME 类型，默认为 Excel 类型
 * @param {Object} [option.params] - 请求时携带的查询参数对象
 * @returns {Promise<any>} 如果下载成功则 resolve 响应数据，失败则 reject 错误信息
 */
export default function useDownloadBlob(
  url,
  option = { name: "", type: "", params: {} }
) {
  const FILE_URL = getFileUrl();
  return new Promise((resolve, reject) => {
    const finalUrl = url.indexOf(FILE_URL) === -1 ? FILE_URL + url : url;
    Object.entries(option.params).forEach(([key, value]) => {
      finalUrl.searchParams.append(key, value);
    });
    fetch(finalUrl, {
      method: "GET",
      mode: "cors",
      headers: {
        "Content-Type": "application/json",
      },
    })
      .then((response) => {
        if (!response.ok) {
          throw new Error("Network response was not ok");
        }
        return response.blob();
      })
      .then((blob) => {
        // 保持原有下载逻辑
        const finalBlob = new Blob([blob], {
          type: option.type || "application/vnd.ms-excel",
        });
        const downloadElement = document.createElement("a");
        const href = window.URL.createObjectURL(finalBlob);
        downloadElement.style.display = "none";
        downloadElement.href = href;
        downloadElement.download =
          option.name || dayjs().format("YYYY-MM-DD HH:mm:ss");
        document.body.appendChild(downloadElement);
        downloadElement.click();
        document.body.removeChild(downloadElement);
        window.URL.revokeObjectURL(href);
        resolve({ data: finalBlob });
      })
      .catch((err) => {
        ElMessage.error("导出失败");
        reject(err);
      });
  });
}