import axios, { AxiosRequestHeaders } from 'axios';
import Config                         from '../config/Config';
import FormData                       from 'form-data';
import logger                         from '../shared/logging/WinstonLogger';


class HttpManager {
    public handleCommandErrors: boolean = true;

    private static _instance: HttpManager;

    public static get instance(): HttpManager {
        if ( !HttpManager._instance ) {
            HttpManager._instance = new HttpManager();
        }

        return HttpManager._instance;
    }

    private constructor() { }

    registerAxiosInterceptor() {
        this.registerRequestInterceptor();
        this.registerResponseInterceptor();
    }

    private registerRequestInterceptor() {
        axios.interceptors.request.use((config) => {
            if ( config.data instanceof FormData ) {
                config.headers = { ...config.headers, ...(config.data as FormData).getHeaders() } as AxiosRequestHeaders;
            }

            if ( config.url && config.url.indexOf(Config.gitlab.apiURL) !== -1 ) {
                config.headers['PRIVATE-TOKEN'] = Config.gitlab.account.token;
            }

            return config;
        });
    }

    private registerResponseInterceptor() {
        axios.interceptors.response.use((response) => {
            return response;
        }, (error) => {
            logger.error(`${ JSON.stringify(error) }`);

            return Promise.reject(error);
        });
    }
}


export default HttpManager.instance;