class Person extends GameObject {
	constructor(config) {
		super(config);
		this.movementProgressRemaining = 0;

		this.isPlayerControlled = config.isPlayerControlled || false;

		this.directionUpdate = {
			"up": ["y", -1],
			"down": ["y", 1],
			"left": ["x", -1],
			"right": ["x", 1],
		}
	}

	update(state) {
		if (this.movementProgressRemaining > 0) {
			this.updatePosition();
		} else {

			// more cases for starting to walk come here

			// case: keyboard ready and arrow pressed
			if (this.isPlayerControlled && state.arrow) {
				this.startBehavior(state, {
					type: "walk",
					direction: state.arrow
				})
			}
			this.updateSprite(state);
		}
	}

	startBehavior(state, behavior) {
		// set character direction to behavior
		this.direction = behavior.direction;
		if (behavior.type === "walk") {
			// stop if space is not free
			if (state.map.isSpaceTaken(this.x, this.y, this.direction)) {
				return;
			}

			// ready to walk
			state.map.moveWall(this.x, this.y, this.direction);
			this.movementProgressRemaining = 16;
		}
	}

	updatePosition() {
		const [property, change] = this.directionUpdate[this.direction];
		this[property] += change;
		this.movementProgressRemaining -= 1;
	}

	updateSprite() {
		if (this.movementProgressRemaining > 0) {
			this.sprite.setAnimation("walk-" + this.direction);
			return;
		}
		this.sprite.setAnimation("idle-" + this.direction);
	}
}