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import { System } from '@serpentity/serpentity';
import WinnerNode from '../nodes/winner';
import PointsNode from '../nodes/points';
import Config from '../config';
/**
* Handles finding the winner
*
* @extends {external:Serpentity.System}
* @class DetectWinnerSystem
* @param {object} config a configuration object to extend.
*/
export default class DetectWinnerSystem extends System {
constructor(config = {}) {
super();
/**
* The collection of points keepers
*
* @property {external:Serpentity.NodeCollection} pointsKeepers
* @instance
* @memberof DetectWinnerSystem
*/
this.pointsKeepers = null;
/**
* The collection of winner keepers
*
* @property {external:Serpentity.NodeCollection} winnerKeepers
* @instance
* @memberof DetectWinnerSystem
*/
this.winnerKeepers = null;
}
/**
* Initializes system when added. Requests points and winner keepers
*
* @function added
* @memberof DetectWinnerSystem
* @instance
* @param {external:Serpentity.Engine} engine the serpentity engine to
* which we are getting added
*/
added(engine) {
this.pointsKeepers = engine.getNodes(PointsNode);
this.winnerKeepers = engine.getNodes(WinnerNode);
}
/**
* Clears system resources when removed.
*
* @function removed
* @instance
* @memberof DetectWinnerSystem
*/
removed() {
this.pointsKeepers = null;
this.winnerKeepers = null;
}
/**
* Runs on every update of the loop. Checks if someone won
*
* @function update
* @instance
* @param {Number} currentFrameDuration the duration of the current
* frame
* @memberof DetectWinnerSystem
*/
update(currentFrameDuration) {
let winner = null;
for (const pointsKeeper of this.pointsKeepers) {
for (const pointsCandidate of Object.keys(pointsKeeper.points)) {
if (pointsKeeper.points[pointsCandidate] >= Config.maxPoints) {
winner = pointsCandidate;
break;
}
}
}
if (!winner) {
return;
}
for (const winnerKeeper of this.winnerKeepers) {
// Only one winner, another system should reset
if (!winnerKeeper.winner.winner) {
winnerKeeper.winner.winner = winner;
}
}
}
}
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