import apiConfig from '@/utils/baseurl'
import {
  Message
} from 'element-ui'

// 生成4位随机验证码
export function generateVerificationCode() {
  const characters = '123456789abcdefghijkmnpqrstuvwxyABCDEFGHJKLMNPQRSTUVWXY';
  let code = '';
  for (let i = 0; i < 4; i++) {
    code += characters.charAt(Math.floor(Math.random() * characters.length));
  }
  return code;
}
// 生成随机字符串
export function generateRandomString(length) {
  const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  const str = [];
  for (let i = 0; i < length; i++) {
    const randomIndex = Math.floor(Math.random() * chars.length);
    str.push(chars[randomIndex]);
  }
  return str.join('');
};

// 导出
export const exportExcell = (name, params, url) => {
  const query = new URLSearchParams(params).toString();
  fetch(`${apiConfig.baseURL}${url}?${query}`, {
    method: 'get',
    headers: {
      Authorization: localStorage.getItem('token'),
      'Content-Type': 'application/json;charset=UTF-8',
      timestamp: new Date().getTime(),
      client: localStorage.getItem('client')
    },
    responseType: 'blob',
  })
    .then((res) => res.blob())
    .then((res) => {
      const link = document.createElement('a');
      link.style.display = 'none';
      link.href = URL.createObjectURL(res);
      link.download = name;
      document.body.appendChild(link);
      link.click();
      // 释放的 URL 对象以及移除 a 标签
      URL.revokeObjectURL(link.href);
      document.body.removeChild(link);
      Message({
        message: '导出成功',
        type: 'success',
        duration: 2000
      })
    });
};