import { _decorator, Component, Node, Prefab, instantiate, Vec3, UITransform, Collider2D, Contact2DType, IPhysics2DContact } from 'cc';
const { ccclass, property } = _decorator;

@ccclass('GameManager')
export class GameManager extends Component {
    @property(Prefab)
    ballPrefab: Prefab = null;

    @property(Prefab)
    bulletPrefab: Prefab = null;

    @property(Prefab)
    blockPrefab: Prefab = null;

    @property(Prefab)
    enemyPrefab: Prefab = null;

    @property(Node)
    walls: Node[] = [];

    @property
    maxEnemies: number = 5;

    private _canvasSize: { width: number, height: number } = { width: 0, height: 0 };
    private _enemies: Node[] = [];

    start() {
        // 获取画布大小
        const canvas = this.node.parent.getComponent(UITransform);
        this._canvasSize.width = canvas.width;
        this._canvasSize.height = canvas.height;

        // 创建小球
        this.createBall();
        
        // 创建方块
        this.createBlock();
        
        // 创建敌人
        this.scheduleOnce(() => {
            this.createEnemies();
        }, 1);
    }

    createBall() {
        const ball = instantiate(this.ballPrefab);
        this.node.parent.addChild(ball);
        
        // 固定位置在(80, 80)
        ball.setPosition(new Vec3(80, 80, 0));
    }

    createBlock() {
        const block = instantiate(this.blockPrefab);
        this.node.parent.addChild(block);
        block.setPosition(new Vec3(0, 0, 0));
    }

    createEnemies() {
        for (let i = 0; i < this.maxEnemies; i++) {
            this.createEnemy();
        }
    }

    createEnemy() {
        const enemy = instantiate(this.enemyPrefab);
        this.node.parent.addChild(enemy);
        
        // 随机位置（在画布边缘区域）
        const side = Math.floor(Math.random() * 4);
        let x = 0;
        let y = 0;
        
        switch (side) {
            case 0: // 上
                x = (Math.random() - 0.5) * (this._canvasSize.width - 100);
                y = this._canvasSize.height / 2 - 50;
                break;
            case 1: // 右
                x = this._canvasSize.width / 2 - 50;
                y = (Math.random() - 0.5) * (this._canvasSize.height - 100);
                break;
            case 2: // 下
                x = (Math.random() - 0.5) * (this._canvasSize.width - 100);
                y = -this._canvasSize.height / 2 + 50;
                break;
            case 3: // 左
                x = -this._canvasSize.width / 2 + 50;
                y = (Math.random() - 0.5) * (this._canvasSize.height - 100);
                break;
        }
        
        enemy.setPosition(new Vec3(x, y, 0));
        this._enemies.push(enemy);
    }

    getEnemies() {
        return this._enemies.filter(enemy => enemy.isValid);
    }

    removeEnemy(enemy: Node) {
        const index = this._enemies.indexOf(enemy);
        if (index !== -1) {
            this._enemies.splice(index, 1);
        }
        
        // 创建新敌人
        this.scheduleOnce(() => {
            this.createEnemy();
        }, 2);
    }
}