import type { CreateAxiosOptions } from './axiosTransform'
import type {
  AxiosRequestConfig,
  AxiosInstance,
  AxiosResponse,
  AxiosError,
} from 'axios'
import type { RequestOptions, RequestResult } from '@vben/types'
import axios from 'axios'
import qs from 'qs'
import { isFunction, cloneDeep } from '@vben/utils'
import { AxiosCanceler } from './axiosCancel'
import { ContentTypeEnum, RequestEnum } from './constants'
export * from './axiosTransform'

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

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

  /**
   * @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(options: CreateAxiosOptions) {
    if (!this.axiosInstance) {
      return
    }
    const opt: CreateAxiosOptions = Object.assign({}, this.options, options)
    this.createAxios(opt)
    this.options = opt
    this.setupInterceptors()
  }

  /**
   * @description: Set general header
   */
  setHeader(headers: any): void {
    if (!this.axiosInstance) {
      return
    }
    Object.assign(this.axiosInstance.defaults.headers, headers)
  }

  /**
   * @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(
      (config: AxiosRequestConfig) => {
        // If cancel repeat request is turned on, then cancel repeat request is prohibited
        // @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,
    )

    // 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,
      )
  }

  // 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<RequestResult>>(conf)
        .then((res: AxiosResponse<RequestResult>) => {
          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)
        })
    })
  }
}