import type { AxiosRequestConfig, AxiosInstance, AxiosResponse, AxiosError } from 'axios';
import type { RequestOptions, Result, UploadFileParams } from '../../../../types/axios';
import type { CreateAxiosOptions } from './axiosTransform';
import axios from 'axios';
import qs from 'qs';
import { AxiosCanceler } from './axiosCancel';
import { isFunction } from '/@/utils/is';
import { cloneDeep, omit } from 'lodash-es';
import { ContentTypeEnum } from '/@/enums/httpEnum';
import { RequestEnum } from '/@/enums/httpEnum';
import { useUserStore } from '/@/store/modules/user';
import { JwtModel } from '/@/api/sys/jwtModel';
import jwt_decode from 'jwt-decode';

export * from './axiosTransform';

/**
 * @description:  axios module
 */
export class VAxios {
  private axiosInstance: AxiosInstance;
  private readonly options: CreateAxiosOptions;
  private waitingQueue: any[];
  private refreshing = false;

  constructor(options: CreateAxiosOptions) {
    this.options = options;
    this.axiosInstance = axios.create(options);
    this.setupInterceptors();
    this.waitingQueue = [];
  }

  /**
   * @description:  Create axios instance
   */
  private createAxios(config: CreateAxiosOptions): void {
    this.axiosInstance = axios.create(config);
  }

  private getTransform() {
    const { transform } = this.options;
    return transform;
  }

  getAxios(): AxiosInstance {
    return this.axiosInstance;
  }

  /**
   * @description: Reconfigure axios
   */
  configAxios(config: CreateAxiosOptions) {
    if (!this.axiosInstance) {
      return;
    }
    this.createAxios(config);
  }

  /**
   * @description: Set general header
   */
  setHeader(headers: any): void {
    if (!this.axiosInstance) {
      return;
    }
    Object.assign(this.axiosInstance.defaults.headers, headers);
  }
  /**
   * JWT 自动刷新
   * @description: 自动刷新token
   */
  private isNeedTokenURL(url, arr = ['/auth/login', '/auth/token']) {
    return !arr.some((val) => url.indexOf(val) > -1);
  }

  /**
   *
   * @returns
   */
  private refreshTokenBeforeReq(doRefreshTokenApi: () => Promise<unknown>): Promise<unknown> {
    // 创建一个未完成的promise，把改变状态的resolve方法交给请求token结束后执行
    const promise = new Promise((resolve) => {
      console.log('等待新token');
      // 等待队列放的是一个回调函数，来延迟resolve的执行，以此控制promise状态的改变
      this.waitingQueue.push(() => resolve(null));
    });
    if (!this.refreshing) {
      this.refreshing = true;
      // 模拟请求刷新Token接口，当接口返回数据时执行then方法 TODO 添加catch捕获异常
      doRefreshTokenApi().then(() => {
        console.log('刷新token成功，放行队列中的请求', this.waitingQueue.length);
        this.refreshing = false;
        this.waitingQueue.forEach((cb) => cb());
        this.waitingQueue.length = 0;
      });
    }
    return promise;
  }
  /**
   * @description: Interceptor configuration
   */
  private setupInterceptors() {
    const transform = this.getTransform();
    if (!transform) {
      return;
    }
    const {
      requestInterceptors,
      requestInterceptorsCatch,
      responseInterceptors,
      responseInterceptorsCatch,
    } = transform;

    const axiosCanceler = new AxiosCanceler();

    // Request interceptor configuration processing
    this.axiosInstance.interceptors.request.use(async (config: AxiosRequestConfig) => {
      // If cancel repeat request is turned on, then cancel repeat request is prohibited
      const userStore = useUserStore();
      if (userStore && userStore.jwtToken) {
        try {
          const res = jwt_decode(userStore.jwtToken) as JwtModel;
          const currentTime = (new Date().getTime() + (config.timeout || 0)) / 1000;
          if (currentTime >= res.exp && this.isNeedTokenURL(config.url)) {
            await this.refreshTokenBeforeReq(userStore.doRefresh);
          }
        } catch (error) {
          userStore.logout();
        }
      }
      const {
        headers: { ignoreCancelToken },
      } = config;

      const ignoreCancel =
        ignoreCancelToken !== undefined
          ? ignoreCancelToken
          : this.options.requestOptions?.ignoreCancelToken;

      !ignoreCancel && axiosCanceler.addPending(config);
      if (requestInterceptors && isFunction(requestInterceptors)) {
        config = requestInterceptors(config, this.options);
      }
      return config;
    }, undefined);

    // Request interceptor error capture
    requestInterceptorsCatch &&
      isFunction(requestInterceptorsCatch) &&
      this.axiosInstance.interceptors.request.use(undefined, requestInterceptorsCatch);

    // Response result interceptor processing
    this.axiosInstance.interceptors.response.use((res: AxiosResponse<any>) => {
      res && axiosCanceler.removePending(res.config);
      if (responseInterceptors && isFunction(responseInterceptors)) {
        res = responseInterceptors(res);
      }
      return res;
    }, undefined);

    // Response result interceptor error capture
    responseInterceptorsCatch &&
      isFunction(responseInterceptorsCatch) &&
      this.axiosInstance.interceptors.response.use(undefined, responseInterceptorsCatch);
  }

  /**
   * @description:  File Upload
   */
  uploadFile<T = any>(config: AxiosRequestConfig, params: UploadFileParams) {
    const formData = new window.FormData();

    if (params.data) {
      Object.keys(params.data).forEach((key) => {
        if (!params.data) return;
        const value = params.data[key];
        if (Array.isArray(value)) {
          value.forEach((item) => {
            formData.append(`${key}[]`, item);
          });
          return;
        }

        formData.append(key, params.data[key]);
      });
    }
    formData.append(params.name || 'file', params.file, params.filename);
    const customParams = omit(params, 'file', 'filename', 'file');

    Object.keys(customParams).forEach((key) => {
      formData.append(key, customParams[key]);
    });

    return this.axiosInstance.request<T>({
      ...config,
      method: 'POST',
      data: formData,
      headers: {
        'Content-type': ContentTypeEnum.FORM_DATA,
        ignoreCancelToken: true,
      },
    });
  }

  // support form-data
  supportFormData(config: AxiosRequestConfig) {
    const headers = config.headers || this.options.headers;
    const contentType = headers?.['Content-Type'] || headers?.['content-type'];

    if (
      contentType !== ContentTypeEnum.FORM_URLENCODED ||
      !Reflect.has(config, 'data') ||
      config.method?.toUpperCase() === RequestEnum.GET
    ) {
      return config;
    }

    return {
      ...config,
      data: qs.stringify(config.data, { arrayFormat: 'brackets' }),
    };
  }

  get<T = any>(config: AxiosRequestConfig, options?: RequestOptions): Promise<T> {
    return this.request({ ...config, method: 'GET' }, options);
  }

  post<T = any>(config: AxiosRequestConfig, options?: RequestOptions): Promise<T> {
    return this.request({ ...config, method: 'POST' }, options);
  }

  put<T = any>(config: AxiosRequestConfig, options?: RequestOptions): Promise<T> {
    return this.request({ ...config, method: 'PUT' }, options);
  }

  delete<T = any>(config: AxiosRequestConfig, options?: RequestOptions): Promise<T> {
    return this.request({ ...config, method: 'DELETE' }, options);
  }

  request<T = any>(config: AxiosRequestConfig, options?: RequestOptions): Promise<T> {
    let conf: CreateAxiosOptions = cloneDeep(config);
    const transform = this.getTransform();

    const { requestOptions } = this.options;

    const opt: RequestOptions = Object.assign({}, requestOptions, options);

    const { beforeRequestHook, requestCatchHook, transformRequestHook } = transform || {};
    if (beforeRequestHook && isFunction(beforeRequestHook)) {
      conf = beforeRequestHook(conf, opt);
    }
    conf.requestOptions = opt;

    conf = this.supportFormData(conf);

    return new Promise((resolve, reject) => {
      this.axiosInstance
        .request<any, AxiosResponse<Result>>(conf)
        .then((res: AxiosResponse<Result>) => {
          if (transformRequestHook && isFunction(transformRequestHook)) {
            try {
              const ret = transformRequestHook(res, opt);
              resolve(ret);
            } catch (err) {
              reject(err || new Error('request error!'));
            }
            return;
          }
          resolve(res as unknown as Promise<T>);
        })
        .catch((e: Error | AxiosError) => {
          if (requestCatchHook && isFunction(requestCatchHook)) {
            reject(requestCatchHook(e, opt));
            return;
          }
          if (axios.isAxiosError(e)) {
            // rewrite error message from axios in here
          }
          reject(e);
        });
    });
  }
}