import { AnomalyId, getAnomalyIdByName, loadAnomalyById } from '../services/anomalyType';
import { getAlertsAnomalies, saveAlertsAnomalies } from '../services/alerts';

import * as Router from 'koa-router';


function getAlert(ctx: Router.IRouterContext) {
  
  let anomalyId: AnomalyId = ctx.request.body.query.anomaly_id;
  let anomaly = loadAnomalyById(anomalyId)
  if (anomaly == null) {
    anomalyId = getAnomalyIdByName(anomalyId.toLowerCase());
  }

  let alertsAnomalies = getAlertsAnomalies();
  let pos = alertsAnomalies.indexOf(anomalyId);

  let enable: boolean = (pos !== -1);
  ctx.response.body = { enable };
  
}

function changeAlert(ctx: Router.IRouterContext) {
  
    let anomalyId: AnomalyId = ctx.request.body.anomaly_id;
    let enable: boolean = ctx.body.enable;

    let anomaly = loadAnomalyById(anomalyId)
    if (anomaly == null) {
      anomalyId = getAnomalyIdByName(anomalyId.toLowerCase());
    }

    let alertsAnomalies = getAlertsAnomalies();
    let pos: number = alertsAnomalies.indexOf(anomalyId);
    if(enable && pos == -1) {
      alertsAnomalies.push(anomalyId);
      saveAlertsAnomalies(alertsAnomalies);
    } else if(!enable && pos > -1) {
      alertsAnomalies.splice(pos, 1);
      saveAlertsAnomalies(alertsAnomalies);
    }
    ctx.response.body = { status: 'Ok' };
}

export const router = new Router();

router.get('/', getAlert);
router.post('/', changeAlert);