class Keyboard{
	constructor(){
		this.keysDown = new Set()
		this.dir = 0;
	}

	updateDir(){
		if(this.keysDown.has('z')){
			if(this.keysDown.has('d')){
				this.dir = 2;
			}else if(this.keysDown.has('s')){
				this.dir = 0;
			}else if(this.keysDown.has('q')){
				this.dir = 8;
			}else{
				this.dir = 1;
			}
		}else if(this.keysDown.has('d')){
			if(this.keysDown.has('s')){
				this.dir = 4;
			}else if(this.keysDown.has('q')){
				this.dir = 0;
			}else{
				this.dir = 3;
			}
		}else if(this.keysDown.has('s')){
			if(this.keysDown.has('q')){
				this.dir = 6;
			}else{
				this.dir = 5;
			}
		}else if(this.keysDown.has('q')){
			this.dir = 7;
		}
	}

	getDirection(){
		return this.dir;
	}

	init(){
		document.addEventListener("keydown", (e)=>{
			this.keysDown.add(e.key.toLowerCase())
			this.updateDir();
		})

		document.addEventListener("keyup", (e)=>{
			this.keysDown.delete(e.key.toLowerCase())
			this.updateDir();
		})
	}
}