const cs = 1024;
const assets = [
    'assets/player.svg',
    'assets/head.svg',
];

function Game() {
    let assetsIn = {};

    for (let asset in assets) {
        assetsIn[asset] = new Image();
        assetsIn[asset].src = assets[asset];
    }

    let canvas = document.querySelector("#canvas");
    let player = new Player(true);
    let entities = [player];

    for (let i = 0; i < 50; i++) {
        entities.push(new Player())
    }

    canvas.width = canvas.height = cs;

    this.canvas = canvas;
    this.ctx = canvas.getContext("2d");
    this.assetsIn = assetsIn;
    this.player = player;
    this.entities = entities;
}

Game.prototype.main = function () {
    let { entities, player } = this;

    if (player.health <= 0) {
		return;
	}

    for (let ent of entities) {
        ent.handleTick(this);
    }
}

// todo: move into its own file
Game.prototype.render = function () {
    let { ctx, assetsIn, entities, player } = this;

    ctx.clearRect(0, 0, cs, cs);

    ctx.save();

    ctx.translate(player.camera.x + cs / 2, player.camera.y + cs / 2);

    for (let ent of entities) {
        ctx.save();

        ctx.translate(ent.pos.x, ent.pos.y);
        ctx.rotate(ent.rot);
        ctx.drawImage(assetsIn[1], -64 / 2, -128, 64, 128);

        ctx.restore();

        ctx.drawImage(assetsIn[0], ent.pos.x - 64 / 2, ent.pos.y - 64 / 2, 64, 64);
    }

    ctx.restore();

    if (player.health <= 0) {
		ctx.fillStyle = 'rgba(0,0,0,0.5)';
        ctx.fillRect(0,0,cs,cs);
        ctx.fillStyle = 'rgb(255,255,255)';
        ctx.textAlign = "center";
        ctx.textBaseline = "middle";
        ctx.font = "bold 48px sans-serif";
        ctx.fillText('You died! Click to respawn',cs/2,cs/2);
	}
}

Game.prototype.ui = function() {
    document.querySelector('.ui-text').textContent = `HP: ${this.player.health}`
}

Game.prototype.click = function () {
    let { player } = this;

    if (player.health <= 0) {
        game = new Game();
    } else {
        player.bump();
    }
}

var game = new Game();

setInterval(function () { game.main() }, 1000 / 60);
setInterval(function () { game.render() }, 1000 / 60);
setInterval(function () { game.ui() }, 1000 / 10);

game.canvas.onclick = () => game.click();