import SystemBase from '../Base/SystemBase'


class InputSystem extends SystemBase {
    private downX:number = -1;
    private downY:number = -1;
    private delay: number = 300;
    private timestamp: number = 0;
    constructor() {
        super(InputSystem.name)
        this.init()
        console.log(this)
    }

    protected ctx() {
        return this;
    }

    private init() {
        document.addEventListener('mousedown', this.mousedown.bind(this));
        document.addEventListener('mouseup', this.mouseup.bind(this));
        document.addEventListener('mousemove', this.mousemove.bind(this));
    }

    private mousedown(e: MouseEvent) {
        this.downX = e.clientX
        this.downY = e.clientY
        this.dispatchEvent({ type: 'mousedown', event: e })
        this.timestamp = Date.now();
    }

    private mouseup(e: MouseEvent) {
        this.dispatchEvent({ type: 'mouseup', event: e })
        if (Date.now() - this.timestamp < this.delay) {
            // 模拟点击事件
            this.dispatchEvent({ type: 'click', event: e })
        }

        this.downX = -1
        this.downY = -1
    }

    private mousemove(e: MouseEvent) {
        this.dispatchEvent({ type: 'mousemove', event: e })
        if(this.downX>-1 || this.downY>-1){
            this.dispatchEvent({ type: 'mousedrag', event: e })
        }
    }
}

export default InputSystem