import request from "@/utils/request";
import { Message, MessageBox } from "element-ui";

/**
 *
 * @param {*} result 结果数组
 * @param {*} predicate 断言函数
 * @param {*} operationName 操作名称
 */
export const multiResultShow = (allItems, predicate, operationName) => {
  const successItems = allItems.filter(predicate);
  if (successItems.length == allItems.length) {
    Message.success(`${operationName}成功`);
  } else {
    Message.error(
      `${operationName}成功${successItems.length}个, 失败${
        allItems.length - successItems.length
      }个!`
    );
  }
};

export function toDecimal(x){
  var f = parseFloat(x)
  if(isNaN(f)){
    return 0;
  }
  f = Math.round(x*100)/100;
  return f;
}

export function delay(ms = 240) {
  return new Promise((resolve) => setTimeout(() => resolve(void 0), ms));
}

/**
 *
 * @param {{ method?: string; url: string; data?: string; type?: string; filename?: string; }} options
 */
export function exportImgFile({
  url,
  method = "post",
  data,
  type = "application/vnd.ms-excel",
  filename = "download",
  ext = "xlsx",
} = {}) {
  if (!url) return;
  const closeMessage = loadingMessage({ message: "文件下载中..." });

  request({
    url,
    method,
    responseType: "blob",
    data: {
      ...data,
    }
  })
    .then((result) => {
      const blob = new Blob([result], { type });
      const downloadElement = document.createElement("a");
      const href = window.URL.createObjectURL(blob);
      downloadElement.href = href;
      downloadElement.download = result.filename || `${filename}.${ext}`;
      document.body.appendChild(downloadElement);
      downloadElement.click();
      document.body.removeChild(downloadElement);
      window.URL.revokeObjectURL(href);

      Message.success("文件下载成功");
    })
    .catch((err) => {
      Message.error("文件下载失败");
    })
    .finally(() => closeMessage());
}
/**
 *
 * @param {{ method?: string; url: string; data?: string; type?: string; filename?: string; }} options
 */
export function exportFile({
  url,
  method = "post",
  data,
  type = "application/vnd.ms-excel",
  filename = "download",
  ext = "xlsx",
} = {}) {
  if (!url) return;
  const closeMessage = loadingMessage({ message: "文件下载中..." });

  request({
    url,
    method,
    responseType: "blob",
    data: {
      ...data,
    },
    params: {
      ...data,
    },
  })
    .then((result) => {
      const blob = new Blob([result], { type });
      const downloadElement = document.createElement("a");
      const href = window.URL.createObjectURL(blob);
      downloadElement.href = href;
      downloadElement.download = result.filename || `${filename}.${ext}`;
      document.body.appendChild(downloadElement);
      downloadElement.click();
      document.body.removeChild(downloadElement);
      window.URL.revokeObjectURL(href);

      Message.success("文件下载成功");
    })
    .catch((err) => {
      Message.error("文件下载失败");
    })
    .finally(() => closeMessage());
}
/**
 *
 * @param {{ method?: string; url: string; data?: string; type?: string; filename?: string; }} options
 */
export function exportFile2({
  url,
  method = "post",
  data,
  type = "application/vnd.ms-excel",
  filename = "download",
  ext = "xlsx",
} = {}) {
  if (!url) return;
  const closeMessage = loadingMessage({ message: "文件下载中..." });
  const formData = new FormData();
  for(let i in data){
    formData.append(i, data[i]);
  }
  request({
    url,
    method,
    responseType: "blob",
    data: formData,
  })
    .then((result) => {
      const blob = new Blob([result], { type });
      const downloadElement = document.createElement("a");
      const href = window.URL.createObjectURL(blob);
      downloadElement.href = href;
      downloadElement.download = result.filename || `${filename}.${ext}`;
      document.body.appendChild(downloadElement);
      downloadElement.click();
      document.body.removeChild(downloadElement);
      window.URL.revokeObjectURL(href);

      Message.success("文件下载成功");
    })
    .catch((err) => {
      Message.error("文件下载失败");
    })
    .finally(() => closeMessage());
}
/**
 * Loading 状态的消息
 * @param {ElMessageOptions} options
 * @returns
 */
export function loadingMessage({ message, ...args } = {}) {
  if (!message) return;

  const loadingMessage = Message.info({
    message,
    duration: 0,
    customClass: "loading-message",
    iconClass: "el-icon-loading",
    ...args,
  });

  return () => loadingMessage.close();
}

/**
 *
 * @param {{ message: string, title: string; [x: string]: any }} param0
 * @returns
 */
export function confirm({
  title = "提示",
  message = "确定要执行该操作吗?",
  ...args
} = {}) {
  return new Promise((resolve, reject) => {
    MessageBox.confirm(message, title, {
      confirmButtonText: "确定",
      cancelButtonText: "取消",
      type: "warning",
      ...args,
    })
      .then(() => {
        resolve(true);
      })
      .catch(() => {
        reject("取消 Confirm");
      });
  });
}

export function uploadFile(
  { url, method = "POST", data } = {},
  {
    // 接受的文件类型
    accept = ".xls,.xlsx",
    // 是否多选
    multiple,
    // 最大文件大小 (单位: MB)
    maxSize = 15,
  } = {}
) {
  return new Promise((resolve, reject) => {
    if (!url) return reject("未配置上传地址");

    const fileDom = document.createElement("input");

    fileDom.type = "file";
    fileDom.setAttribute("type", "file");
    accept && fileDom.setAttribute("accept", accept);
    multiple && fileDom.setAttribute("multiple", "");

    fileDom.click();

    fileDom.oncancel = function () {
      reject("取消 Upload");
    };

    fileDom.onchange = function () {
      const [file] = fileDom.files;

      if (!file) return reject("未选择文件");

      if (file.size > 1024 * 1024 * maxSize) {
        Message.error(`文件大小不能超过${maxSize}MB`);
        reject(`文件大小不能超过${maxSize}MB`);
        return;
      }

      const close = loadingMessage({ message: "文件上传中..." });

      const formData = new FormData();

      formData.append("file", file);

      for (const key in data) {
        formData.append(key, data[key]);
      }

      request({
        url,
        method,
        headers: {
          "Content-Type": "multipart/form-data",
        },
        data: formData,
      })
        .then((res) => {
          if (res.code !== 200) {
            Message.error("上传失败");
            reject(res.msg);
            return;
          }

          Message.success("上传成功");

          resolve(res,file);
        })
        .catch((err) => {
          reject(err);
        })
        .finally(() => {
          close();
        });
    };
  });
}

/**
 *
 * @param {*} number
 * @returns
 */
export function returnFileSize(number) {
  if (number < 1024) {
    return `${number} bytes`;
  } else if (number >= 1024 && number < 1048576) {
    return `${(number / 1024).toFixed(1)} KB`;
  } else if (number >= 1048576) {
    return `${(number / 1048576).toFixed(1)} MB`;
  }
}