import { ArrayList, HashMap } from '@kit.ArkTS';
import http from '@ohos.net.http';
import { LogHelper } from '../../../../Index';
import { SZYXLocalStorageHelper } from '../utils/SZYXLocalStorageHelper';
import { SZYXLocalStorageKeys } from '../utils/SZYXLocalStorageKeys';
import { HttpHelperX, HttpParamsForm, HttpParamsGet, HttpParamsPost } from './HttpHelperX';


export class HttpHelper {
  private static instance: HttpHelper | null = null

  // 单例模式
  static get() {
    // 判断系统是否已经有单例了
    if (HttpHelper.instance === null) {
      HttpHelper.instance = new HttpHelper()
    }
    return HttpHelper.instance
  }

  //请求中队列
  private httpHandlerList = new HashMap<string, http.HttpRequest>();
  // 并发白名单，这个名单里面的api，重复请求不会取消
  private concurrentList = new ArrayList<string>();

  constructor() {
    this.httpHandlerList = new HashMap<string, http.HttpRequest>();
    SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
    SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength, this.httpHandlerList.length)
    this.concurrentList.clear()
  }

  /**
   * 添加并发白名单
   * @param apiNo
   */
  public addConcurrent(apiNo?: string) {
    if (!apiNo) {
      return
    }
    if (this.concurrentList.getIndexOf(apiNo) === -1) {
      this.concurrentList.add(apiNo)
    }
  }

  public removeConcurrent(apiNo: string) {
    if (this.concurrentList.getIndexOf(apiNo) !== -1) {
      this.concurrentList.remove(apiNo)
    }
  }

  /**
   * postJson请求
   * @param url url地址
   * @param headers
   * @param apiNo 请求标识，取消请求或者去重使用|考虑做自动重试使用
   * @returns
   */
  public postJson<T>(params: HttpParamsPost, apiNo?: string, showLog?: boolean): Promise<T> {

    return new Promise<T>((resolve, reject) => {

      if (this.concurrentList.getIndexOf(apiNo ?? params.url) === -1 &&
      this.httpHandlerList.hasKey(apiNo ?? params.url)) {
        this.httpHandlerList.get(apiNo ?? params.url).destroy()
        this.httpHandlerList.remove(apiNo ?? params.url)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
          this.httpHandlerList.length)
      }
      let httpRequest = http.createHttp();

      if (this.concurrentList.getIndexOf(apiNo ?? params.url) === -1) {
        this.httpHandlerList.set(apiNo ?? params.url, httpRequest)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
          this.httpHandlerList.length)
      }

      const header = HttpHelperX.getHeaders("application/json;charset=UTF-8", params.headers)

      if (showLog) {
        LogHelper.debug(`postJson：${apiNo}\n`, JSON.stringify(params))
      }

      httpRequest.request(HttpHelperX.getUrl(params.url, params.query), {
        method: http.RequestMethod.POST,
        connectTimeout: 20000,
        readTimeout: 20000,
        header: header,
        extraData: params.data,
        usingCache: false,
      })
        .then((data: http.HttpResponse) => {
          if (showLog) {
            LogHelper.debug(`${apiNo}:\n ${data.result as string}`)
            LogHelper.print(data)
          }

          if (this.httpHandlerList.hasKey(apiNo ?? params.url)) {
            this.httpHandlerList.remove(apiNo ?? params.url)
            SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
            SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
              this.httpHandlerList.length)
          }
          if (data.responseCode === 200) {
            resolve((typeof data.result === 'string' ? JSON.parse(data.result) : data.result) as T)
          } else {
            const err: Error = new Error()
            err.name = data.responseCode.toString()
            err.message = '服务异常'
            reject(err)
          }
        }).catch((err: Error) => {
        LogHelper.error(JSON.stringify({ err: err, url: params.url, }))
        if (this.httpHandlerList.hasKey(apiNo ?? params.url)) {
          this.httpHandlerList.remove(apiNo ?? params.url)
          SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
          SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
            this.httpHandlerList.length)
        }
        if (err.message === 'Failed writing received data to disk/application') {
          const error: Error = new Error()
          error.name = 'cancel'
          error.message = err.message
          reject(error)
        } else {
          reject(err)
        }
      });
    });

  }

  /**
   * postForm请求
   * @param url url地址
   * @param headers
   * @param apiNo 请求标识，取消请求或者去重使用|考虑做自动重试使用
   * @returns
   */
  public postForm<T>(params: HttpParamsForm, apiNo?: string, showLog?: boolean): Promise<T> {

    return new Promise<T>((resolve, reject) => {

      if (this.concurrentList.getIndexOf(apiNo ?? params.url) === -1 &&
      this.httpHandlerList.hasKey(apiNo ?? params.url)) {
        this.httpHandlerList.get(apiNo ?? params.url).destroy()
        this.httpHandlerList.remove(apiNo ?? params.url)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
          this.httpHandlerList.length)
      }
      let httpRequest = http.createHttp();

      if (this.concurrentList.getIndexOf(apiNo ?? params.url) === -1) {
        this.httpHandlerList.set(apiNo ?? params.url, httpRequest)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
          this.httpHandlerList.length)
      }

      const header = HttpHelperX.getHeaders("application/x-www-form-urlencoded;charset=UTF-8", params.headers)
      let data = HttpHelperX.getContent(params.data)

      if (showLog) {
        LogHelper.debug(`postForm：${apiNo}\n`, JSON.stringify(params))
      }

      httpRequest.request(HttpHelperX.getUrl(params.url, params.query), {
        method: http.RequestMethod.POST,
        connectTimeout: 20000,
        readTimeout: 20000,
        header: header,
        usingCache: false,
        extraData: data ? encodeURI(data) : undefined
      })
        .then((data: http.HttpResponse) => {
          if (showLog) {
            LogHelper.debug(`${apiNo}:\n ${data.result as string}`)
            LogHelper.print(data)
          }

          if (this.httpHandlerList.hasKey(apiNo ?? params.url)) {
            this.httpHandlerList.remove(apiNo ?? params.url)
            SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
            SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
              this.httpHandlerList.length)
          }
          if (data.responseCode === 200) {
            resolve((typeof data.result === 'string' ? JSON.parse(data.result) : data.result) as T)
          } else {
            const err: Error = new Error()
            err.name = data.responseCode.toString()
            err.message = '服务异常'
            reject(err)
          }
        }).catch((err: Error) => {
        LogHelper.error(JSON.stringify({ err: err, url: params.url, }))
        if (this.httpHandlerList.hasKey(apiNo ?? params.url)) {
          this.httpHandlerList.remove(apiNo ?? params.url)
          SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
          SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
            this.httpHandlerList.length)
        }
        if (err.message === 'Failed writing received data to disk/application') {
          const error: Error = new Error()
          error.name = 'cancel'
          error.message = err.message
          reject(error)
        } else {
          reject(err)
        }
      });
    });

  }


  /**
   * get请求
   * @param url url地址
   * @param data 请求参数
   * @param headers
   * @param apiNo 请求标识，取消请求或者去重使用|考虑做自动重试使用
   * @returns
   */
  public get<T>(params: HttpParamsGet, apiNo?: string, showLog?: boolean): Promise<T> {

    return new Promise<T>((resolve, reject) => {

      if (this.concurrentList.getIndexOf(apiNo ?? params.url) === -1 &&
      this.httpHandlerList.hasKey(apiNo ?? params.url)) {
        this.httpHandlerList.get(apiNo ?? params.url).destroy()
        this.httpHandlerList.remove(apiNo ?? params.url)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
          this.httpHandlerList.length)
      }
      let httpRequest = http.createHttp();

      if (this.concurrentList.getIndexOf(apiNo ?? params.url) === -1) {
        this.httpHandlerList.set(apiNo ?? params.url, httpRequest)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
        SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
          this.httpHandlerList.length)
      }

      if (showLog) {
        LogHelper.debug(`GET：${apiNo}\n`, HttpHelperX.getUrl(params.url, params.query) + '\n',
          JSON.stringify(params.headers))
      }

      httpRequest.request(HttpHelperX.getUrl(params.url, params.query), {
        method: http.RequestMethod.GET,
        connectTimeout: 20000,
        readTimeout: 20000,
        header: params.headers,
        usingCache: false,
        // extraData: params.data
      })
        .then((data: http.HttpResponse) => {
          if (showLog) {
            LogHelper.debug(`${apiNo}:\n${data.result as string}`)
            LogHelper.print(data)
          }

          if (this.httpHandlerList.hasKey(apiNo ?? params.url)) {
            this.httpHandlerList.remove(apiNo ?? params.url)
            SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
            SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
              this.httpHandlerList.length)
          }
          if (data.responseCode === 200) {
            resolve((typeof data.result === 'string' ? JSON.parse(data.result) : data.result) as T)
          } else {
            const err: Error = new Error()
            err.name = data.responseCode.toString()
            err.message = '服务异常'
            reject(err)
          }
        }).catch((err: Error) => {
        LogHelper.error(JSON.stringify({ err: err, url: params.url, }))
        if (this.httpHandlerList.hasKey(apiNo ?? params.url)) {
          this.httpHandlerList.remove(apiNo ?? params.url)
          SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
          SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
            this.httpHandlerList.length)
        }
        if (err.message === 'Failed writing received data to disk/application') {
          const error: Error = new Error()
          error.name = 'cancel'
          error.message = err.message
          reject(error)
        } else {
          reject(err)
        }
      });
    });

  }

  clearHttp() {
    for (let handler of this.httpHandlerList.keys()) {
      this.cancel(handler)
    }

  }

  cancel(apiNo: string) {
    if (this.httpHandlerList.hasKey(apiNo)) {
      this.httpHandlerList.get(apiNo).destroy()
      this.httpHandlerList.remove(apiNo)
      SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerList, this.httpHandlerList)
      SZYXLocalStorageHelper.storage.setOrCreate(SZYXLocalStorageKeys.HttpHandlerListLength,
        this.httpHandlerList.length)
    }
  }
}