import Axios, { AxiosInstance, AxiosRequestConfig } from "axios";
import qs from "qs";
import NProgress from "../progress";
import { getToken, getRelaComNo } from "/@/utils/auth";

import { store } from "/@/store";
import { trigger } from "/@/plugins/errorHooks/trigger";

import {
  PureHttpError,
  RequestMethods,
  PureHttpResponse,
  PureHttpRequestConfig
} from "./types.d";

// 相关配置请参考：www.axios-js.com/zh-cn/docs/#axios-request-config-1
const defaultConfig: AxiosRequestConfig = {
  baseURL: "",
  timeout: 10000,
  headers: {
    Accept: "application/json, text/plain, */*",
    "Content-Type": "application/json",
    "X-Requested-With": "XMLHttpRequest"
  },
  // 数组格式参数序列化
  paramsSerializer: params => qs.stringify(params, { indices: false })
};

class PureHttp {
  constructor() {
    this.httpInterceptorsRequest();
    this.httpInterceptorsResponse();
  }
  // 初始化配置对象
  private static initConfig: PureHttpRequestConfig = {};

  // 保存当前Axios实例对象
  private static axiosInstance: AxiosInstance = Axios.create(defaultConfig);

  // 请求拦截
  private httpInterceptorsRequest(): void {
    PureHttp.axiosInstance.interceptors.response.use(response => {
      // const { data } = response;
      return response;
    });

    PureHttp.axiosInstance.interceptors.request.use(
      (config: PureHttpRequestConfig) => {
        const $config = config;
        // 开启进度条动画
        NProgress.start();
        // 优先判断post/get等方法是否传入回掉，否则执行初始化设置等回掉
        if (typeof config.beforeRequestCallback === "function") {
          config.beforeRequestCallback($config);
          return $config;
        }
        if (PureHttp.initConfig.beforeRequestCallback) {
          PureHttp.initConfig.beforeRequestCallback($config);
          return $config;
        }
        const token = getToken();
        const relaComNo = getRelaComNo();

        const isSuper = store.state.value["pure-user"].isSuperUser;

        if (token && config && config.data) {
          config.data["token"] = token;

          config.data["relaComNo"] = config.data["relaComNo"] ? config.data["relaComNo"] : relaComNo;

          if (config.data["noRela"] || isSuper) {
            config.data["relaComNo"] = "";
            delete config.data["noRela"];
          }

          if (config.data["emptyRela"] || isSuper) {
            delete config.data["relaComNo"];
            delete config.data["emptyRela"];
          }
          
          return $config;
        } else {
          return $config;
        }
      },
      error => {
        return Promise.reject(error);
      }
    );
  }

  // 响应拦截
  private httpInterceptorsResponse(): void {
    const instance = PureHttp.axiosInstance;
    instance.interceptors.response.use(
      (response: PureHttpResponse) => {
        const $config = response.config;
        // 关闭进度条动画
        NProgress.done();
        // 优先判断post/get等方法是否传入回掉，否则执行初始化设置等回掉
        if (typeof $config.beforeResponseCallback === "function") {
          $config.beforeResponseCallback(response);
          return response.data;
        }
        if (PureHttp.initConfig.beforeResponseCallback) {
          PureHttp.initConfig.beforeResponseCallback(response);
          return response.data;
        }
        return response.data;
      },
      (error: PureHttpError) => {
        const $error = error;
        $error.isCancelRequest = Axios.isCancel($error);
        // 关闭进度条动画
        NProgress.done();
        // 所有的响应异常 区分来源为取消请求/非取消请求
        return Promise.reject($error);
      }
    );
  }

  // 通用请求工具函数
  public request<T>(
    method: RequestMethods,
    url: string,
    param?: AxiosRequestConfig,
    axiosConfig?: PureHttpRequestConfig
  ): Promise<T> {
    const config = {
      method,
      url,
      ...param,
      ...axiosConfig
    } as PureHttpRequestConfig;

    // 单独处理自定义请求/响应回掉
    return new Promise((resolve, reject) => {
      PureHttp.axiosInstance
        .request(config)
        .then((response: undefined) => {
          resolve(response);
        })
        .catch(error => {
          reject(error);
        });
    });
  }

  // 单独抽离的post工具函数
  public post<T, P>(
    url: string,
    params?: T,
    config?: PureHttpRequestConfig
  ): Promise<P> {
    return this.request<P>("post", url, params, config);
  }

  // 单独抽离的get工具函数
  public get<T, P>(
    url: string,
    params?: T,
    config?: PureHttpRequestConfig
  ): Promise<P> {
    return this.request<P>("get", url, params, config);
  }
}

export const http = new PureHttp();
