import { _decorator, Component, Node, Sprite, UITransform } from 'cc';
const { ccclass, property } = _decorator;

@ccclass('AdapSize')
export class AdapSize extends Component {

    container: UITransform;
    sprite: Sprite;

    protected onLoad(): void {
        this.container = this.node.getComponent(UITransform);
        this.sprite = this.getComponent(Sprite);
    }


    // 可以手动调用此方法进行适配
    public resize() {

        if (!this.container || !this.sprite || !this.sprite.spriteFrame) {
            console.warn("缺少组件或 SpriteFrame");
            return;
        }

        const textureSize = this.sprite.spriteFrame.originalSize;
        const containerSize = this.container.contentSize;

        if (textureSize.width === 0 || textureSize.height === 0) {
            console.warn("图片尺寸为0，请确认 SpriteFrame 是否加载完成");
            return;
        }

        // 计算缩放比例
        const scaleX = containerSize.width / textureSize.width;
        const scaleY = containerSize.height / textureSize.height;
        const scale = Math.min(scaleX, scaleY); // contain 模式

        // 设置缩放和位置
        const finalWidth = textureSize.width * scale;
        const finalHeight = textureSize.height * scale;

        const uiTransform = this.sprite.node.getComponent(UITransform);
        if (uiTransform) {
            uiTransform.setContentSize(finalWidth, finalHeight);
            uiTransform.anchorX = 0.5;
            uiTransform.anchorY = 0.5;
            this.sprite.node.setPosition(0, 0); // 居中
        }
    }



    // 生命周期钩子中自动调用
    onEnable() {
        this.resize();
    }


    // 如果容器尺寸会动态变化，可以监听窗口事件
    start() {
        // 例如监听窗口尺寸变化
        // cc.game.on(cc.EVENT_RESIZE, this.resize, this);
    }

    onDestroy() {
        // cc.game.off(cc.EVENT_RESIZE, this.resize, this);
    }
}