import { Injectable } from '@angular/core';
import * as io from 'socket.io-client';

const values = {
  SYST: 'systole',
  DIAS: 'diastole',
  INST_HR: 'instantaneous HR',
  AVG_HR: 'average HR',

  TYPE: 'type',
  DATA: 'data',

  PPG: 'PPG'
};

@Injectable()
export class ProcessingService {

  SYST: number;
  DIAS: number;
  INST_HR: number;
  AVG_HR: number;

  socket: SocketIOClient.Socket;

  constructor() {
    this.socket = io('http://localhost:5000');
    this.socket.connect();

    this.startPPG();

    this.socket.on('data', (data) => console.log('got data', data));
    this.socket.on('event', (event) => console.log('got event', event));

    this.socket.on(values.SYST, (data) => this.SYST = data);
    this.socket.on(values.DIAS, (data) => this.DIAS = data);
    this.socket.on(values.INST_HR, (data) => this.INST_HR = data);
    this.socket.on(values.AVG_HR, (data) => this.AVG_HR = data);
  }

  startPPG() {
    if (!this.socket.connected) {
      this.socket.on('connect', () => this.socket.emit(values.TYPE, values.PPG));
    } else {
      this.socket.emit(values.TYPE, values.PPG);
    }
  }

  giveData(data: number[]) {
    if (this.socket.connected) {
      data.map(val => this.socket.emit(values.DATA, val));
      // this.socket.emit(values.DATA, data);
    }
  }
}