"use strict";

document.addEventListener('DOMContentLoaded', init);


function init() {
    let ctx, canvas = document.createElement("canvas");
    canvas.width = window.innerWidth
    canvas.height = window.innerHeight
    ctx = canvas.getContext('2d');
    document.body.insertBefore(canvas, document.body.childNodes[0]);

    function run() {
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        refresh();
        requestAnimationFrame(run);
    }

    // -------------------------------------------------------------------
    let gstate = 0;
    let key = new Key(controls);
    let intro = new Intro(ctx);
    let gameOver = new GameOver(ctx);
    let score = new Score(ctx);
    let lives = new Lives(ctx);
    let bar = new Bar(ctx, key);
    let balls = [];
    newGame();

    function controls(e) {
        switch (gstate) {
            case 0: // Waiting to start
                if (e.code == 'Space') newGame();
                break;
            case 1: // Playing...
                if (e.code == 'Space' && balls.length>0) balls[balls.length - 1].start();
                else
                    if (e.code == 'KeyX') { balls.push(new Ball(ctx, bar)); balls[balls.length - 1].start(); }
                break;
            case 2: // Game Over
                if (e.code == 'Space') newGame();
                break;
        }
    }

    function newGame() {
        gstate = 1;
        lives.reset();
        score.reset();
        bar.reset();
        balls.push(new Ball(ctx, bar));
    }

    function refresh() {
        switch (gstate) {
            case 0: // Waiting to start
                intro.update();
                break;
            case 1: // Playing...
            case 2:

                if(gstate==2) {
                    gameOver.update();
                } else {
                    bar.update();
                    balls = balls.filter(ball => ball.update());
                    if (balls.length==0) {
                        if ( lives.lost() ) gstate=2;
                        else balls.push(new Ball(ctx, bar));
                    }
                }
                score.update();
                lives.update();
                break;
        }
    }

    run();
}