import { _decorator, Component, Node, UITransform, Label, tween, Vec3, find } from 'cc';
import EventBus, { GameEvents } from '../Core/EventBus';

const { ccclass, property } = _decorator;

@ccclass('ToastAni')
export class ToastAni extends Component {
    
    private originalPosition: Vec3 = new Vec3();
    private isAnimating: boolean = false;
    private currentDuration: number = 2.0; // 默认显示时长（秒）
    
    onLoad() {
        // 保存初始位置
        this.originalPosition = this.node.position.clone();
        
        // 监听Toast事件
        this.setupEventListeners();
        
        // 初始化位置到屏幕左边外侧
        this.resetToInitialPosition();
    }
    
    private setupEventListeners() {
        EventBus.getInstance().on(GameEvents.SHOW_TOAST, this.onShowToast, this);
        EventBus.getInstance().on(GameEvents.HIDE_TOAST, this.onHideToast, this);
    }
    
    private onShowToast(data: { message: string, duration?: number }) {
        if (this.isAnimating) {
            return;
        }
        
        // 设置显示时长
        this.currentDuration = data.duration || 2.0;
        
        // 设置Toast文本
        this.setToastMessage(data.message);
        
        // 播放滑入动画
        this.playSlideInAnimation();
    }
    
    private onHideToast() {
        if (!this.isAnimating) {
            this.playSlideOutAnimation();
        }
    }
    
    private setToastMessage(message: string) {
        const labelNode = this.node.getChildByName('label');
        if (labelNode) {
            const label = labelNode.getComponent(Label);
            if (label) {
                label.string = message;
            }
        }
    }
    
    private resetToInitialPosition() {
        // 重置到原始位置（屏幕外侧的起始位置）
        this.node.setPosition(this.originalPosition);
    }
    
    private playSlideInAnimation() {
        if (this.isAnimating) {
            return;
        }
        
        this.isAnimating = true;
        
        // 确保从起始位置开始
        this.resetToInitialPosition();
        
        // 滑入到屏幕中央位置显示
        const targetPosition = new Vec3(0, this.originalPosition.y, this.originalPosition.z);
        
        tween(this.node)
            .to(0.5, { position: targetPosition }, { easing: 'sineOut' })
            .delay(this.currentDuration)
            .call(() => {
                this.playSlideOutAnimation();
            })
            .start();
    }
    
    private playSlideOutAnimation() {
        if (!this.isAnimating) {
            return;
        }
        
        // 获取Canvas尺寸来计算屏幕边界
        const canvas = find('Canvas');
        if (canvas) {
            const canvasTransform = canvas.getComponent(UITransform);
            if (canvasTransform) {
                const canvasWidth = canvasTransform.contentSize.width;
                // 获取Toast节点的宽度
                const toastTransform = this.node.getComponent(UITransform);
                const toastWidth = toastTransform ? toastTransform.contentSize.width : 200;
                // 滑出到屏幕右边外侧消失
                const rightPosition = new Vec3(canvasWidth / 2 + toastWidth / 2 + 50, this.node.position.y, this.node.position.z);
                
                tween(this.node)
                    .to(0.5, { position: rightPosition }, { easing: 'sineIn' })
                    .call(() => {
                        // 动画完成后立即重置到初始位置
                        this.resetToInitialPosition();
                        this.isAnimating = false;
                    })
                    .start();
            }
        }
    }
    
    onDestroy() {
        // 移除事件监听
        EventBus.getInstance().off(GameEvents.SHOW_TOAST, this.onShowToast, this);
        EventBus.getInstance().off(GameEvents.HIDE_TOAST, this.onHideToast, this);
    }
}