import { _decorator, CCInteger, Color, Component, Node, PolygonCollider2D, RigidBody2D, Sprite } from 'cc';
const { ccclass, property } = _decorator;

/** 木板脱离屏幕后销毁的 Y 阈值（本地坐标） */
const BOARD_FALL_DESTROY_Y = -1000;
/** 螺丝全部拔完后木板掉落时的整体色调 */
const BOARD_FALL_GRAY = '#646464';

/**木板子元素*/
@ccclass('Aelement')
export class Aelement extends Component {

    @property(CCInteger)
    aelementHoleNum: number = 2;

    /** 木板上尚未脱落的螺丝数量 */
    private _remainingScrews = 0;
    /** 螺丝全部脱落后，开始检测木板掉落 */
    private _fallCheckEnabled = false;

    /** 木板是否已进入掉落态（置灰），不再参与遮挡其它螺丝 */
    get isFalling(): boolean {
        return this._fallCheckEnabled;
    }

    /** 获取木板上所有孔洞节点（孔洞1、孔洞2…） */
    getHoleNodes(): Node[] {
        return this.node.children
            .filter((c) => c.name.startsWith('孔洞'))
            .sort((a, b) => a.name.localeCompare(b.name, 'zh'));
    }

    /** 生成螺丝后登记数量 */
    initScrewCount(count: number) {
        this._remainingScrews = count;
        this._fallCheckEnabled = false;
    }

    /** 螺丝从木板上脱落（弹出或消除）时由 LuosiDing 调用 */
    onScrewLeft() {
        if (this._remainingScrews <= 0) return;
        this._remainingScrews--;
        if (this._remainingScrews <= 0) {
            this._fallCheckEnabled = true;
            this._applyFallGrayColor();
        }
    }

    /** 螺丝拔完开始掉落时，将木板及子节点 Sprite 整体置灰 */
    private _applyFallGrayColor() {
        const gray = new Color().fromHEX(BOARD_FALL_GRAY);
        const visit = (n: Node) => {
            const sp = n.getComponent(Sprite);
            if (sp) sp.color = gray;
            for (const child of n.children) visit(child);
        };
        visit(this.node);
    }

    /** 开启木板刚体与多边形碰撞体（prefab 默认关闭，生成后再启用） */
    enablePhysics() {
        const rb = this.node.getComponent(RigidBody2D);
        if (rb){
            rb.enabled = true;
            //rb.gravityScale = 0.5
            rb.angularDamping = 0.8;
        }


        const poly = this.node.getComponent(PolygonCollider2D);
        if (poly) {
            poly.enabled = false;
            poly.enabled = true;
        }
    }

    update() {
        if (!this._fallCheckEnabled || !this.node?.isValid) return;
        if (this.node.position.y < BOARD_FALL_DESTROY_Y) {
            console.log('木板销毁完成');
            this.node.destroy();
        }
    }
}