class Scene {

    // boid radius
    // no of boids
    // scene width
    // scene height
    constructor(boid_radius, no_of_boids) {
        this.boid_radius = boid_radius;
        this.no_of_boids = no_of_boids;
        this.boids = [];
        this.gameArea = {};
        this.started = false;
        this.width = 600;
        this.height = 600;

        this.initGameArea();
        this.initBoids();
    }

    initBoids() {
        let boids = [];
        for (let i = 0; i < this.no_of_boids; i++) {
            boids.push(new Boid(
                this.boid_radius,
                "black",
                300, 300, Math.random() * 360,
                // Math.random() * (this.gameArea.canvas.width - 100) + 50,
                // Math.random() * (this.gameArea.canvas.height - 100) + 50,
                // Math.random() * 360,
                i,
                this.width,
                this.height
            ));
        }

        this.boids = boids;
    }

    initGameArea() {
        this.gameArea = new GameArea(this.width, this.height);
        this.gameArea.init()
    }

    start() {
        if (this.started) {
            return;
        }

        // Kinda annoying, setInterval is a piece of shite and is always run from global scope
        // Therefore "this.update" will be undefined unless we bind it
        const updateMe = this.update.bind(this);
        this.interval = setInterval(updateMe, 20);
        // updateMe();
        this.started = true;
    }

    update() {
        this.gameArea.clear();
        for (let i = 0; i < this.no_of_boids; i++) {
            this.boids[i].move(this.boids);
            this.boids[i].draw(this.gameArea.context);
        }
    }

    stop() {
        if (!this.started) {
            return;
        }

        clearInterval(this.interval);
        this.interval = null;
        this.started = false;
    }

    reset() {
        if (this.started) {
            this.stop();
        }
        this.boids = new Array;
        this.initBoids();
        this.gameArea.clear();
        this.started = false;
    }

}