cc.Class({
    extends: cc.Component,

    editor: {
        menu: 'Debug/DebugCtrl'
    },

    properties: {
        btnNode: cc.Node,

        _prevX: 0,
        _prevY: 0,
        _didMove: false
    },

    onEnable () {
        this.btnNode.on(cc.Node.EventType.TOUCH_START, this._onTouchStart, this);
        this.btnNode.on(cc.Node.EventType.TOUCH_MOVE, this._onTouchMove, this);
        this.btnNode.on(cc.Node.EventType.TOUCH_END, this._onTouchEnd, this);
        this.btnNode.on(cc.Node.EventType.TOUCH_CANCEL, this._onTouchEnd, this);
        cc.tween(this.btnNode)
            .delay(1)
            .to(1, {opacity: 0})
            .start();
    },

    onDisable () {
        this.btnNode.off(cc.Node.EventType.TOUCH_START, this._onTouchStart, this);
        this.btnNode.off(cc.Node.EventType.TOUCH_MOVE, this._onTouchMove, this);
        this.btnNode.off(cc.Node.EventType.TOUCH_END, this._onTouchEnd, this);
        this.btnNode.off(cc.Node.EventType.TOUCH_CANCEL, this._onTouchEnd, this);
    },
    onClicked () {
        G.AppUtils.getSceneCtrl().showAlert('edt_prefab/Debug/debug_alert', undefined);
    },

    _onTouchStart (event) {
        let location = event.getLocation();

        this._didMove = false;

        this.btnNode.stopAllActions();
        this.btnNode.opacity = 255;
        this._prevX = location.x;
        this._prevY = location.y;
    },

    _onTouchMove (event) {
        let location = event.getLocation();

        let posX = this.btnNode.x;
        let posY = this.btnNode.y;
        if (!this._didMove) {
            let deltaV2 = cc.v2(posX, posY).sub(cc.v2(location.x, location.y));
            let dist = deltaV2.mag();
            if (dist > 44) {
                this._didMove = true;
            }
        }

        if (this._didMove) {
            this.btnNode.x = posX + (location.x - this._prevX);
            this.btnNode.y = posY + (location.y - this._prevY);

            this._prevX = location.x;
            this._prevY = location.y;
        }
    },

    _onTouchEnd (event) {
        if (!this._didMove) {
            this.onClicked();
        }

        this._didMove = false;

        this._prevX = 0;
        this._prevY = 0;

        cc.tween(this.btnNode)
            .delay(1)
            .to(1, {opacity: 0})
            .start();
    }
});