import { AxiosInstance, AxiosRequestConfig, AxiosError, CancelTokenStatic } from 'axios'

export type HEADERS = { [key: string]: string }
export const DEFAULT_HEADERS: {
  Accept: 'application/json'
  'Content-Type': 'application/json'
}

export const NONE: null
export const CLIENT_ERROR: 'CLIENT_ERROR'
export const SERVER_ERROR: 'SERVER_ERROR'
export const TIMEOUT_ERROR: 'TIMEOUT_ERROR'
export const CONNECTION_ERROR: 'CONNECTION_ERROR'
export const NETWORK_ERROR: 'NETWORK_ERROR'
export const UNKNOWN_ERROR: 'UNKNOWN_ERROR'
export const CANCEL_ERROR: 'CANCEL_ERROR'
export type PROBLEM_CODE =
  | 'CLIENT_ERROR'
  | 'SERVER_ERROR'
  | 'TIMEOUT_ERROR'
  | 'CONNECTION_ERROR'
  | 'NETWORK_ERROR'
  | 'UNKNOWN_ERROR'
  | 'CANCEL_ERROR'

export interface ApisauceConfig extends AxiosRequestConfig {
  baseURL: string | undefined
  axiosInstance?: AxiosInstance
}

/**
 * Creates a instance of our API using the configuration
 * @param config a configuration object which must have a non-empty 'baseURL' property.
 */
export function create(config: ApisauceConfig): ApisauceInstance

export interface ApiErrorResponse<T> {
  ok: false
  problem: PROBLEM_CODE
  originalError: AxiosError

  data?: T
  status?: number
  headers?: {}
  config?: AxiosRequestConfig
  duration?: number
}
export interface ApiOkResponse<T> {
  ok: true
  problem: null
  originalError: null

  data?: T
  status?: number
  headers?: {}
  config?: AxiosRequestConfig
  duration?: number
}
export type ApiResponse<T, U = T> = ApiErrorResponse<U> | ApiOkResponse<T>

export type Monitor = (response: ApiResponse<any>) => void
export type RequestTransform = (request: AxiosRequestConfig) => void
export type AsyncRequestTransform = (
  request: AxiosRequestConfig,
) => Promise<void> | ((request: AxiosRequestConfig) => Promise<void>)
export type ResponseTransform = (response: ApiResponse<any>) => void
export type AsyncResponseTransform = (
  response: ApiResponse<any>,
) => Promise<void> | ((response: ApiResponse<any>) => Promise<void>)

export interface ApisauceInstance {
  axiosInstance: AxiosInstance

  monitors: Monitor
  addMonitor: (monitor: Monitor) => void

  requestTransforms: RequestTransform[]
  asyncRequestTransforms: AsyncRequestTransform[]
  responseTransforms: ResponseTransform[]
  asyncResponseTransforms: AsyncResponseTransform[]
  addRequestTransform: (transform: RequestTransform) => void
  addAsyncRequestTransform: (transform: AsyncRequestTransform) => void
  addResponseTransform: (transform: ResponseTransform) => void
  addAsyncResponseTransform: (transform: AsyncResponseTransform) => void

  headers: HEADERS
  setHeader: (key: string, value: string) => AxiosInstance
  setHeaders: (headers: HEADERS) => AxiosInstance
  deleteHeader: (name: string) => AxiosInstance

  /** Sets a new base URL */
  setBaseURL: (baseUrl: string) => AxiosInstance
  /** Gets the current base URL used by axios */
  getBaseURL: () => string

  get: <T, U = T>(url: string, params?: {}, axiosConfig?: AxiosRequestConfig) => Promise<ApiResponse<T, U>>
  delete: <T, U = T>(url: string, params?: {}, axiosConfig?: AxiosRequestConfig) => Promise<ApiResponse<T, U>>
  head: <T, U = T>(url: string, params?: {}, axiosConfig?: AxiosRequestConfig) => Promise<ApiResponse<T, U>>
  post: <T, U = T>(url: string, data?: any, axiosConfig?: AxiosRequestConfig) => Promise<ApiResponse<T, U>>
  put: <T, U = T>(url: string, data?: any, axiosConfig?: AxiosRequestConfig) => Promise<ApiResponse<T, U>>
  patch: <T, U = T>(url: string, data?: any, axiosConfig?: AxiosRequestConfig) => Promise<ApiResponse<T, U>>
  link: <T, U = T>(url: string, params?: {}, axiosConfig?: AxiosRequestConfig) => Promise<ApiResponse<T, U>>
  unlink: <T, U = T>(url: string, params?: {}, axiosConfig?: AxiosRequestConfig) => Promise<ApiResponse<T, U>>
}

export function isCancel(value: any): boolean

export const CancelToken: CancelTokenStatic

declare const _default: {
  DEFAULT_HEADERS: typeof DEFAULT_HEADERS
  NONE: typeof NONE
  CLIENT_ERROR: typeof CLIENT_ERROR
  SERVER_ERROR: typeof SERVER_ERROR
  TIMEOUT_ERROR: typeof TIMEOUT_ERROR
  CONNECTION_ERROR: typeof CONNECTION_ERROR
  NETWORK_ERROR: typeof NETWORK_ERROR
  UNKNOWN_ERROR: typeof UNKNOWN_ERROR
  create: typeof create
  isCancel: typeof isCancel
  CancelToken: typeof CancelToken
}

export default _default