import axios from 'axios';

const UA      = window.navigator.userAgent;
const isIE11  = UA.indexOf('Trident/7') !== -1;
const isIE    = UA.indexOf('MSIE') !== -1 || isIE11;
const isEdge  = UA.indexOf('Edge/') !== -1;
const promise = new Promise( () => {} );
//const serverMap = {
//  nf: 'https://api.northfork.se/api/',
//  ga: 'https://www.gastrofy.se/api/',
//};

export class HttpService {
  host: string;
  customerToken: string;
  memberToken: string;

  constructor( options?:any ) {
    this.config( options );

    axios.defaults.headers.common['Content-Type'] = 'application/json';
    if( isIE || isEdge ) {
      axios.defaults.headers.common['Cache-Control'] = 'no-cache';
      axios.defaults.headers.common['Pragma'] = 'no-cache';
      axios.defaults.headers.common['Expires'] = 'Sat, 01 Jan 2000 00:00:00 GMT';
    }
    this.initMethods();
  }

  config( config:any ) {
    if( !config ) return;
    for( let attr of [ 'host', 'customerToken', 'memberToken' ] ) {
      if( config[ attr ] ) this[attr] = config[attr];
    }
  }

  // It is possible to use config.xxxToken to overwrite temperary
  private parseConfig( config:any ) {
    config = {...config||{}}
    config.headers = {...config.headers||{}};

    let customerToken = this.customerToken;
    if( config.customerToken ) {
      customerToken = config.customerToken;
      delete config.customerToken;
    }

    let memberToken = this.memberToken;
    if( config.memberToken ) {
      memberToken = config.memberToken;
      delete config.memberToken;
    }

    if( customerToken ) config.headers['X-Custom-Auth'] = customerToken;
    if( memberToken ) config.headers['token'] = memberToken;

    return config;
  }

  private initMethods() {
    for( let action of [ 'get', 'post', 'delete', 'put', 'patch' ] ) {
      this[ action ] = function() {
        let args = [].slice.call( arguments );
        let config:any = args.splice( ['post','put','patch'].indexOf( action ) === -1?1:2, 1 )[0];
        config = this.parseConfig( config );

        let host = this.host;
        if( config.host ) {
          host = config.host;
          delete config.host;
        }

        if( host ) {
          host = host.replace( /\/+$/, '' );
          args[0] = args[0].replace( /^\/+/, '' );
          args[0] = host +'/'+ args[0];
        }

        args.push( config );

        return axios[action].apply( this, args ).then( ( res:any ) => {
          return res.data;
        } );
      }
    }
  }

  get( apiPath:string, config?:any ) { return promise; }
  delete( apiPath:string, config?:any ) { return promise; }
  post( apiPath:string, data?:any, config?:any ) { return promise; }
  put( apiPath:string, data?:any, config?:any ) { return promise; }
  patch( apiPath:string, data?:any, config?:any ) { return promise; }
}