import { notification } from 'antd';
import HttpRequest from './kim-request';
import config from '@/config';

const {
  baseUrl,
  apiPrefix,
  headers,
  resCodeKey,
  resMessageKey,
  successCode,
  isThrowError = true,
} = config;

/**
 * 异常处理程序
 */
const errorHandler = error => {
  const { response } = error;
  if (response && response.status) {
    const errorText = response.statusText;
    const { status, url, code } = response;
    notification.error({
      key: `notification_${code}`,
      message: `请求错误 ${status}: ${url}`,
      description: errorText,
    });
  }
};

/**
 * 组装url
 * @param {url} url
 * @param {配置参数} more
 */
const mergeApi = (url, more) => {
  if (more && more.apiPrefix && typeof more.apiPrefix === 'string') {
    return `${config.apiPrefix}${url}`;
  }
  if (apiPrefix && typeof apiPrefix === 'string') {
    return `${config.apiPrefix}${url}`;
  }
  return url;
};

const axios = new HttpRequest({
  baseUrl,
  headers: headers() || {},
  errorHandler,
});

/**
 * 正常返回结果处理
 * @param {返回请求数据} response
 * @param {配置项} more
 */
const checkCode = (response, more) => {
  const { data } = response;
  //
  if (`${data[resCodeKey]}` !== `${successCode}`) {
    if (isThrowError) {
      const errorMessage = data[resMessageKey] || '后端接口返回异常';
      const error = new Error(data[resCodeKey]);
      error.code = response[resCodeKey];
      error.message = errorMessage;
      throw error;
    }
  }
  return data;
};

export default function request(url, options = {}, more = {}) {
  let newOptions = options;
  newOptions.url = url;
  if (more.headers) {
    newOptions = { ...options, headers: more.headers };
  }
  return axios.request(newOptions).then(response => checkCode(response, more));
}

const get = (url, data, more = {}) =>
  request(
    `${mergeApi(url, more)}`,
    {
      method: 'get', // default
      params: data,
    },
    more,
  );

const post = (url, data, more = {}) =>
  request(
    `${mergeApi(url, more)}`,
    {
      method: 'post', // default
      data,
    },
    more,
  );

const put = (url, data, more = {}) =>
  request(
    `${mergeApi(url, more)}`,
    {
      method: 'put', // default
      data,
    },
    more,
  );

const del = (url, data, more = {}) =>
  request(
    `${mergeApi(url, more)}`,
    {
      method: 'delete', // default
      data,
    },
    more,
  );

const patch = (url, data, more = {}) =>
  request(
    `${mergeApi(url, more)}`,
    {
      method: 'patch', // default
      data,
      ...more,
    },
    more,
  );

const formDataUpload = (url, data, more = {}) => {
  const formData = new FormData();
  if (data) {
    Object.keys(data).forEach(key => {
      formData.append(key, data[key]);
    });
  }
  post(`${mergeApi(url, more)}`, formData, {
    headers: {
      'Content-Type': 'multipart/form-data',
    },
    ...more,
  });
};

const uploadFile = (url, data, type = 'formData', more = {}) => {
  if (type === 'formData') {
    formDataUpload(url, data, more);
  }
};

export { request, get, post, put, del, patch, uploadFile };