class InputHandler {
    constructor(eventBus) {
        this.eventBus = eventBus;
        this.handleKeyDown = this.handleKeyDown.bind(this);
        this.keys = {
            "ArrowRight":()=>{
                this.eventBus.emit("move", {dx:1,dy:0});
            },
            "ArrowLeft":()=>{
                this.eventBus.emit("move", {dx:-1, dy:0});
            },
            "ArrowDown":()=>{
                this.eventBus.emit("move", {dx:0, dy:1});
            },
            "ArrowUp":()=>{
                this.eventBus.emit("rotate", {});
            },
            "Space":()=>{
               this.eventBus.emit("gameStart", {});
            }
        }
        document.addEventListener("keydown", this.handleKeyDown);
    }
    handleKeyDown(event) {
        if(event.code in this.keys){
            this.keys[event.code]()
        }
    }
}