// plugins/nuxt/axios.ts

import type { AxiosInstance, AxiosError } from 'axios';
import type { Context } from '@nuxt/types';
// @ts-ignore
import isAbsoluteURL from 'axios/lib/helpers/isAbsoluteURL';
import { axios, axiosStatic, withCredentials } from '@monq/core/src/lib/axios';

// source: https://github.com/nuxt-community/axios-module/blob/85840c6b087c1b250e9d930f3db44c5fd5f41d59/lib/plugin.js#L116
const setupNuxtProgress = (axiosInstance: AxiosInstance) => {
  if (typeof window === 'undefined') {
    return;
  }

  // A noop loading inteterface for when $nuxt is not yet ready
  const noopLoading = {
    finish: () => { },
    start: () => { },
    fail: () => { },
    set: () => { },
  };

  const $loading = () => {
    const $nuxt = typeof window !== 'undefined' && window.$nuxt;
    return ($nuxt && $nuxt.$loading && $nuxt.$loading.hasOwnProperty('set')) ? $nuxt.$loading : noopLoading;
  };

  let currentRequests = 0;

  axiosInstance.interceptors.request.use((config) => {
    currentRequests++;
    return config;
  });

  axiosInstance.interceptors.response.use((response) => {
    currentRequests--;

    if (currentRequests <= 0) {
      currentRequests = 0;
      $loading().finish();
    }

    return response;
  });

  const onError = (error: AxiosError) => {
    currentRequests--;

    if (axiosStatic.isCancel(error)) {
      if (currentRequests <= 0) {
        currentRequests = 0;
        $loading().finish();
      }
      return Promise.reject(error);
    }

    // @ts-ignore
    $loading().fail();
    $loading().finish();

    return Promise.reject(error);
  };

  axiosInstance.interceptors.request.use(undefined, onError);
  axiosInstance.interceptors.response.use(undefined, onError);

  const onProgress = (e: { loaded: number, total: number }) => {
    if (!currentRequests) {
      return;
    }
    const progress = ((e.loaded * 100) / (e.total * currentRequests));
    // @ts-ignore
    $loading().set(Math.min(100, progress));
  };

  axiosInstance.defaults.onUploadProgress = onProgress;
  axiosInstance.defaults.onDownloadProgress = onProgress;
};

export default function({ $config }: Context) {
  // apply interceptors on response
  axios.interceptors.request.use(withCredentials);

  setupNuxtProgress(axios);

  const defaults = axios.defaults;
  defaults.baseURL = $config.BASE_API_URL;
}