class SheepController {

	constructor() {
		this.sheep = null;
		this.proximity = 100;
		this.wanderRange = 50;
		this.wanderTimer = 5000;
	}

	init(systemObject, sheep) {
		this.system = systemObject;

		this.sheep = sheep;
		this.proximity = Math.floor(80 * Math.random() + 30);
		this.wanderRange = Math.floor(100 * Math.random() + 50);
		this.wanderTimer = Math.floor(15 * Math.random() + 5) * 1000;
	}

	reset() {

	}

	makeDecisions(player) {
		if(this.sheep.isRunningAway) {
			return;
		}
		let distance = Math.abs(this.system.distanceTo(this.sheep.position, player.position));
		if(distance < this.proximity) {
			clearTimeout(this.isIdle);
			this.isIdle = null;
			let deltaDistance = Math.floor(4 * Math.random() * (this.proximity - distance));
			let angleTo = this.system.angleTo(player.position, this.sheep.position);
			this.sheep.targetPosition.x = Math.floor(deltaDistance * Math.cos(angleTo)) + this.sheep.position.x;
			this.sheep.targetPosition.y = Math.floor(deltaDistance * Math.sin(angleTo)) + this.sheep.position.y;
			this.sheep.targetAngle = angleTo;
			this.sheep.isRunningAway = true;
		} else {
			if(distance < this.proximity * 2) {
				this.sheep.targetAngle = this.system.angleTo(this.sheep.position, player.position);
			}
			if(this.isIdle) {
				return;
			}
			this.isIdle = setTimeout(() => {this.pickNewDestination()}, this.wanderTimer);
		}
	}

	pickNewDestination() {
		this.isIdle = null;
		this.sheep.targetPosition.x = Math.floor(this.wanderRange * 2 * Math.random() - this.wanderRange) + this.sheep.position.x;
		this.sheep.targetPosition.y = Math.floor(this.wanderRange * 2 * Math.random() - this.wanderRange) + this.sheep.position.y;
	}

	contextMenu() {
	}

	debugDraw(context) {
		if(!localStorage['game.debug']) {
			return;
		}
		context.fillStyle = "red";
		context.strokeStyle = "red";
		context.lineWidth = 1;
		context.beginPath();
		context.moveTo(this.sheep.position.x, this.sheep.position.y);
		context.lineTo(this.sheep.targetPosition.x, this.sheep.targetPosition.y);
		context.stroke();

		context.beginPath();
		context.arc(this.sheep.position.x, this.sheep.position.y, this.proximity, 0, 2 * Math.PI);
		context.stroke();

		context.strokeStyle = "yellow";

		context.beginPath();
		context.arc(this.sheep.position.x, this.sheep.position.y, this.proximity  * 2, 0, 2 * Math.PI);
		context.stroke();
	}
}