const KEYS = 16;


// Keyboard
// 1  2  3  C
// 4  5  6  D
// 7  8  9  E
// A  0  B  F 
class Keyboard {
	keys : Uint8Array;

	userKeyboardMap: Map<number, number>;

	constructor() {
		this.keys = new Uint8Array(KEYS);

		// Used to check keys from the user event.keys
		this.userKeyboardMap = new Map<number, number>();
	}

	private setKey(key: number, pressed: boolean) {
		this.keys[key] = pressed ? 1 : 0;
	}

	public setUserKey(userKey: number, key: number) {
		this.userKeyboardMap.set(userKey, key);
	}

	public userKeyPressedDown(userKey: number) {
		let keyVal: number = this.userKeyboardMap.get(userKey) ?? -1;
		if(keyVal != -1) this.setKey(keyVal, true);
	}

	public userKeyPressedUp(userKey: number) {
		let keyVal: number = this.userKeyboardMap.get(userKey) ?? -1;
		if(keyVal != -1) this.setKey(keyVal, false);
	}
}

export default Keyboard;