import type { AxiosInstance, AxiosResponse, AxiosError, InternalAxiosRequestConfig, AxiosRequestConfig } 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 } from 'lodash-es'
import { ContentTypeEnum } from '@/enums/httpEnum'
import { RequestEnum } from '@/enums/httpEnum'
import { downloadByData } from '@/utils/file/download'
import { useGlobSetting } from '@/hooks/setting'
import { setAccessToken, getRefreshToken, getTenantId, getAccessToken } from '@/utils/auth'

export * from './axiosTransform'
const globSetting = useGlobSetting()
// 请求队列
let requestList: any[] = []
// 是否正在刷新中
let isRefreshToken = false

/**
 * @description:  axios 模块
 */
export class VAxios {
  private axiosInstance: AxiosInstance
  private readonly options: CreateAxiosOptions

  constructor(options: CreateAxiosOptions) {
    this.options = options
    this.axiosInstance = axios.create(options)
    this.setupInterceptors()
  }

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

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

  getAxios(): AxiosInstance {
    return this.axiosInstance
  }
  refreshToken() {
    axios.defaults.headers.common['tenant-id'] = getTenantId() as number
    return axios.post(globSetting.apiUrl + '/system/auth/refresh-token?refreshToken=' + getRefreshToken())
  }

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

  /**
   * @description: 设置通用标题
   */
  setHeader(headers: any): void {
    if (!this.axiosInstance) {
      return
    }
    Object.assign(this.axiosInstance.defaults.headers, headers)
  }

  /**
   * @description: Interceptor configuration 拦截器配置
   */
  private setupInterceptors() {
    const transform = this.getTransform()
    if (!transform) {
      return
    }
    const { requestInterceptors, requestInterceptorsCatch, responseInterceptors, responseInterceptorsCatch } = transform

    const axiosCanceler = new AxiosCanceler()

    // 请求拦截器配置处理
    this.axiosInstance.interceptors.request.use((config: InternalAxiosRequestConfig) => {
      // 如果开启取消重复请求，则禁止取消重复请求
      // @ts-ignore
      const { ignoreCancelToken } = config.requestOptions
      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)

    // 请求拦截器错误捕获
    requestInterceptorsCatch &&
      isFunction(requestInterceptorsCatch) &&
      this.axiosInstance.interceptors.request.use(undefined, requestInterceptorsCatch)

    // 响应结果拦截器处理
    this.axiosInstance.interceptors.response.use(async (res: AxiosResponse<any>) => {
      const config = res.config
      if (res.data.code === 401) {
        // 如果未认证，并且未进行刷新令牌，说明可能是访问令牌过期了
        if (!isRefreshToken) {
          isRefreshToken = true
          // 1. 获取到刷新token
          if (getRefreshToken()) {
            // 2. 进行刷新访问令牌
            console.info('进行刷新访问令牌')
            try {
              const refreshTokenRes = await this.refreshToken()
              // 2.1 刷新成功，则回放队列的请求 + 当前请求
              setAccessToken(refreshTokenRes.data.data)
              ;(config as Recordable).headers.Authorization = 'Bearer ' + getAccessToken()
              requestList.forEach((cb: any) => {
                cb()
              })
              requestList = []
              // TODO
              console.info('刷新令牌end', res)
              // return new Promise((resolve) => {
              //   resolve(this.axiosInstance(config))
              // })
              // res = await Promise.all([this.axiosInstance(config)])[0]
            } catch (e) {
              console.info(e)
              requestList.forEach((cb: any) => {
                cb()
              })
            } finally {
              requestList = []
              isRefreshToken = false
            }
          }
        } else {
          // 添加到队列，等待刷新获取到新的令牌
          return new Promise((resolve) => {
            requestList.push(() => {
              ;(config as Recordable).headers.Authorization = 'Bearer ' + getAccessToken() // 让每个请求携带自定义token 请根据实际情况自行修改
              resolve(this.axiosInstance(config))
            })
          })
        }
      }
      res && axiosCanceler.removePending(res.config)
      if (responseInterceptors && isFunction(responseInterceptors)) {
        res = responseInterceptors(res)
      }
      return res
    }, undefined)

    // 响应结果拦截器错误捕获
    responseInterceptorsCatch &&
      isFunction(responseInterceptorsCatch) &&
      this.axiosInstance.interceptors.response.use(undefined, (error) => {
        // @ts-ignore
        return responseInterceptorsCatch(this.axiosInstance, error)
      })
  }

  /**
   * @description:  文件上传
   */
  uploadFile<T = any>(config: AxiosRequestConfig, params: UploadFileParams) {
    const formData = new window.FormData()
    const customFilename = params.name || 'file'

    if (params.filename) {
      formData.append(customFilename, params.file, params.filename)
    } else {
      formData.append(customFilename, params.file)
    }

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

        formData.append(key, params.data![key])
      })
    }

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

  // 支持表单数据
  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)
  }

  download<T = any>(config: AxiosRequestConfig, title?: string, options?: RequestOptions): Promise<T> {
    let conf: CreateAxiosOptions = cloneDeep({
      ...config,
      method: 'GET',
      responseType: 'blob'
    })
    const transform = this.getTransform()

    const { requestOptions } = this.options

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

    const { beforeRequestHook, requestCatchHook } = 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>) => {
          resolve(res as unknown as Promise<T>)
          // download file
          if (typeof res != undefined) {
            downloadByData(res?.data as unknown as BlobPart, title || 'export')
          }
        })
        .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)
        })
    })
  }

  export<T = any>(config: AxiosRequestConfig, title: string, options?: RequestOptions): Promise<T> {
    let conf: CreateAxiosOptions = cloneDeep({
      ...config,
      method: 'POST',
      responseType: 'blob'
    })
    const transform = this.getTransform()

    const { requestOptions } = this.options

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

    const { beforeRequestHook, requestCatchHook } = 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>) => {
          resolve(res as unknown as Promise<T>)
          // download file
          if (typeof res != undefined) {
            downloadByData(res?.data as unknown as BlobPart, title)
          }
        })
        .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)
        })
    })
  }

  request<T = any>(config: AxiosRequestConfig, options?: RequestOptions): Promise<T> {
    let conf: CreateAxiosOptions = cloneDeep(config)
    // cancelToken 如果被深拷贝，会导致最外层无法使用cancel方法来取消请求
    if (config.cancelToken) {
      conf.cancelToken = config.cancelToken
    }
    const transform = this.getTransform()

    const { requestOptions } = this.options

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

    const { beforeRequestHook, requestCatchHook, transformResponseHook } = 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 (transformResponseHook && isFunction(transformResponseHook)) {
            try {
              const ret = transformResponseHook(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)) {
            // 在此处重写来自 axios 的错误消息
          }
          reject(e)
        })
    })
  }
}