type Vec2 = [number, number];
type Rad = number;

interface Graphics {
	clear(): void;
	drawCar(pos: Vec2, angle: Rad): void;
}


class CanvasGraphics implements Graphics {
	private canvas = document.querySelector<HTMLCanvasElement>("#canvas")!;
	private ctx = this.canvas.getContext("2d")!;
	private alpha = 1;
	private trans: Vec2 = [100, 350];

	public setup() {
		this.canvas.width = 500;
		this.canvas.height = 500;
	}

	public clear() {
		this.setFill(100, 170, 255);
		this.fillRect([0, 0], [this.canvas.width, this.canvas.height]);

		// Draw ground
		this.setFill(50, 155, 50);
		this.fillRect([0, 350], [this.canvas.width, 150]);
	}

	public drawCar(pos: Vec2, angle: Rad) {
		const [x, y] = pos;
		this.ctx.save();
		this.ctx.translate(...this.trans);



		this.ctx.save();
		this.ctx.translate(60 + x, 0 + y);
		this.ctx.rotate(angle);

		// Draw car body
		this.setFill(200, 0, 0);
		this.fillRect([-20, -40], [80, 21]);
		this.fillRect([-20, -20], [100, 20]);

		// Draw rear wheel
		this.setFill(0, 0, 0);
		this.fillCircle([0, 0], 10);

		// Draw front wheel
		this.fillCircle([60, 0], 10);

		this.ctx.restore();


		this.ctx.restore();

	}

	private setFill(red: number, green: number, blue: number): void {
		this.ctx.fillStyle = `rgba(${red}, ${green}, ${blue}, ${this.alpha})`;
	}

	private fillRect(pos: Vec2, size: Vec2): void {
		const [x, y] = pos;
		const [width, height] = size;
		this.ctx.fillRect(x, y, width, height);
	}

	private fillCircle(pos: Vec2, radius: number) {
		const [x, y] = pos;
		this.ctx.beginPath();
		this.ctx.arc(x, y, radius, 0, Math.PI * 2);
		this.ctx.fill();
	}
}

interface Entity {
	render(graphics: Graphics): void;
	update(delta: number): void;
}

class Car implements Entity {
	private pos: Vec2 = [0, 0];
	private angle: Rad = 0;
	private speeder = 1.0;

	public render(graphics: Graphics): void {
		graphics.drawCar(this.pos, this.angle);
	}

	public update(delta: number): void {
		if (this.angle > Math.PI / -2) {
			this.angle += this.speeder * -0.005 * Math.PI;
			this.pos[0] += this.speeder * delta * 100;
		}
	}

	public setSpeeder(speeder: number): void {
		this.speeder = speeder;
	}

	public getAngle(): number {
		return this.angle;
	}
}

class Matrix { 
	private entities: Entity[] = []
	private graphics = new CanvasGraphics();

	public setup() {
		this.graphics.setup();
	}

	public start() {
		const looped = (before: number) => {
			const now = Date.now();
			const delta = (now - before) / 1000;
			for (const entity of this.entities) {
				entity.update(delta);
			}
			this.graphics.clear();
			for (const entity of this.entities) {
				entity.render(this.graphics);
			}
			requestAnimationFrame(() => looped(now));
		}
		looped(Date.now());
	}

	public addEntity(entity: Entity) {
		this.entities.push(entity);
	}
}




function main() {
	const matricen = new Matrix();
	matricen.setup();

	const car = new Car();
	matricen.addEntity(car);
	matricen.start();
}


main();