import { _decorator, Component, Node, ProgressBar, tween, UITransform, Vec3, BoxCollider2D, Collider2D, CircleCollider2D } from 'cc';
const { ccclass, property } = _decorator;

/**
 * 血条动画组件
 * 使用两个重叠的血条实现黄色血皮滑动动画效果
 * 红色血条显示当前血量，黄色血条用于滑动动画
 * 血条默认隐藏，只在受伤时显示并播放动画
 */
@ccclass('HPBarAnimation')
export class HPBarAnimation extends Component {
    
    @property({
        type: Node,
        tooltip: '红色血条节点'
    })
    public redBarNode: Node = null;
    
    @property({
        type: Node,
        tooltip: '黄色血条节点'
    })
    public yellowBarNode: Node = null;
    
    @property({
        type: Node,
        tooltip: 'HPBar根节点'
    })
    public hpBarRootNode: Node = null;

    @property({ tooltip: '血条相对敌人顶部的额外偏移（像素）' })
    public offsetY: number = 18;

    @property({ tooltip: '优先使用碰撞体高度定位' })
    public useColliderForTop: boolean = true;

    @property({ tooltip: '打印调试日志' })
    public debugLogs: boolean = true;
    
    private redProgressBar: ProgressBar = null;
    private yellowProgressBar: ProgressBar = null;
    private currentProgress: number = 1.0;
    private targetProgress: number = 1.0;
    private currentTween: any = null; // 当前正在运行的动画
    private hideTimer: any = null; // 隐藏血条的定时器
    
    start() {
        this.initializeComponents();
        this.updateBarPosition(true);
        if (this.debugLogs) console.log(`[HPBarAnimation] start: node=${this.getNodePath(this.node)}`);
    }
    
    /**
     * 初始化组件
     */
    private initializeComponents() {
        // 获取组件所属的敌人节点信息
        const enemyNode = this.node;
        const enemyName = enemyNode ? enemyNode.name : 'Unknown';
        if (this.debugLogs) console.log(`[HPBarAnimation] initialize on ${this.getNodePath(this.node)} enemy=${enemyName}`);
        
        // 如果没有设置HPBar根节点，尝试自动查找或使用当前节点
        if (!this.hpBarRootNode) {
            const child = this.node.getChildByName('HPBar');
            if (child) {
                this.hpBarRootNode = child;
                if (this.debugLogs) console.log(`[HPBarAnimation] 自动设置 hpBarRootNode 为子节点: ${this.getNodePath(child)}`);
            } else {
                this.hpBarRootNode = this.node;
                if (this.debugLogs) console.log(`[HPBarAnimation] 未找到子节点 HPBar，hpBarRootNode 使用当前节点: ${this.getNodePath(this.node)}`);
            }
        }
        
        // 获取红色血条组件
        if (this.redBarNode) {
            this.redProgressBar = this.redBarNode.getComponent(ProgressBar);
            if (this.redProgressBar) {
                this.currentProgress = this.redProgressBar.progress;
                this.targetProgress = this.currentProgress;
            } else {
                console.error(`[HPBarAnimation] [${enemyName}] 红色血条节点上未找到ProgressBar组件!`);
            }
        } else {
            console.error(`[HPBarAnimation] [${enemyName}] 红色血条节点未设置!`);
        }
        
        // 获取黄色血条组件
        if (this.yellowBarNode) {
            this.yellowProgressBar = this.yellowBarNode.getComponent(ProgressBar);
            if (this.yellowProgressBar) {
                // 黄色血条初始进度与红色血条同步
                this.yellowProgressBar.progress = this.currentProgress;
            } else {
                console.error(`[HPBarAnimation] [${enemyName}] 黄色血条节点上未找到ProgressBar组件!`);
            }
        } else {
            console.error(`[HPBarAnimation] [${enemyName}] 黄色血条节点未设置!`);
        }
        
        // 初始化时隐藏血条
        this.hideHealthBar();
    }
    
    /**
     * 获取节点路径
     */
    private getNodePath(node: Node): string {
        if (!node) return 'null';
        let path = node.name;
        let current = node;
        
        while (current.parent) {
            current = current.parent;
            path = current.name + '/' + path;
        }
        
        return path;
    }
    

    
    /**
     * 更新血条显示
     */
    private updateBarDisplay() {
        if (!this.redProgressBar || !this.yellowProgressBar) {
            return;
        }
        
        // 红色血条显示当前血量
        if (this.redProgressBar && this.redProgressBar.isValid) {
            this.redProgressBar.progress = this.currentProgress;
        }
    }
    
    /**
     * 显示血条
     */
    public showHealthBar() {
        // 仅在首次显示时进行定位计算，避免每次受击重复计算
        const barNode = (this.hpBarRootNode && this.hpBarRootNode.isValid) ? this.hpBarRootNode : this.node;
        const wasActive = barNode.active;
        if (!wasActive) {
            this.updateBarPosition();
        }
        if (this.hpBarRootNode && this.hpBarRootNode.isValid) {
            this.hpBarRootNode.active = true;
            if (this.debugLogs) console.log(`[HPBarAnimation] showHealthBar: active=true path=${this.getNodePath(this.hpBarRootNode)}`);
        } else {
            if (this.debugLogs) console.warn(`[HPBarAnimation] showHealthBar: hpBarRootNode 无效，使用当前节点 path=${this.getNodePath(this.node)}`);
            this.node.active = true;
        }
        // 清除隐藏定时器
        if (this.hideTimer) {
            clearTimeout(this.hideTimer);
            this.hideTimer = null;
        }
    }
    
    /**
     * 隐藏血条
     */
    public hideHealthBar() {
        if (this.hpBarRootNode && this.hpBarRootNode.isValid) {
            this.hpBarRootNode.active = false;
            if (this.debugLogs) console.log(`[HPBarAnimation] hideHealthBar: active=false path=${this.getNodePath(this.hpBarRootNode)}`);
        } else {
            if (this.debugLogs) console.warn(`[HPBarAnimation] hideHealthBar: hpBarRootNode 无效，使用当前节点 path=${this.getNodePath(this.node)}`);
            this.node.active = false;
        }
    }
    
    /**
     * 延迟隐藏血条
     * @param delay 延迟时间（秒）
     */
    private scheduleHideHealthBar(delay: number = 3.0) {
        if (this.debugLogs) console.log(`[HPBarAnimation] scheduleHideHealthBar: delay=${delay}s path=${this.getNodePath(this.hpBarRootNode || this.node)}`);
        // 清除之前的定时器
        if (this.hideTimer) {
            clearTimeout(this.hideTimer);
        }
        // 设置新的定时器
        this.hideTimer = setTimeout(() => {
            this.hideHealthBar();
            this.hideTimer = null;
        }, delay * 1000);
    }
    
    /**
     * 更新血条进度并播放动画
     * @param newProgress 新的血量百分比 (0-1)
     * @param showBar 是否显示血条（默认为true）
     */
    public updateProgress(newProgress: number, showBar: boolean = true) {
        const enemyName = this.node ? this.node.name : 'Unknown';
        if (this.debugLogs) console.log(`[HPBarAnimation] updateProgress(showBar=${showBar}) ${this.currentProgress} -> ${newProgress}`);
        if (!this.redProgressBar || !this.yellowProgressBar) {
            console.warn(`[HPBarAnimation] [${enemyName}] 红色或黄色血条组件未初始化`);
            return;
        }
        newProgress = Math.max(0, Math.min(1, newProgress));
        if (showBar) {
            this.showHealthBar();
            // 定位仅在首次显示时执行，避免受击重复计算
        }
        
        // 如果血量增加或没有变化，直接更新
        if (newProgress >= this.currentProgress) {
            this.currentProgress = newProgress;
            this.targetProgress = newProgress;
            // 同步更新两个血条
            if (this.redProgressBar && this.redProgressBar.isValid) {
                this.redProgressBar.progress = newProgress;
            }
            if (this.yellowProgressBar && this.yellowProgressBar.isValid) {
                this.yellowProgressBar.progress = newProgress;
            }
            this.updateBarDisplay();
            
            // 如果血量满了，立即隐藏血条
            if (newProgress >= 1.0) {
                this.scheduleHideHealthBar(1.0); // 1秒后隐藏
            } else if (showBar) {
                this.scheduleHideHealthBar(3.0); // 3秒后隐藏
            }
            return;
        }
        
        // 血量减少时播放黄色血皮滑动动画
        this.playDamageAnimation(newProgress);
    }
    
    /**
     * 播放伤害动画
     * @param newProgress 新的血量百分比
     */
    private playDamageAnimation(newProgress: number) {
        console.log(`[HPBarAnimation] 开始播放伤害动画：${this.currentProgress} -> ${newProgress}`);
        
        // 停止当前正在运行的动画，避免动画冲突
        if (this.currentTween) {
            this.currentTween.stop();
            this.currentTween = null;
        }
        
        this.targetProgress = newProgress;
        
        // 保存原始血量作为黄色血条起始位置
        const originalProgress = this.currentProgress;
        
        // 1. 立即更新红色血条到新的血量值
        this.currentProgress = newProgress;
        if (this.redProgressBar && this.redProgressBar.isValid) {
            this.redProgressBar.progress = newProgress;
        }
        
        // 2. 黄色血条从原血量滑动到新血量位置        
        // 黄色血条保持在原始位置
        if (this.yellowProgressBar && this.yellowProgressBar.isValid) {
            this.yellowProgressBar.progress = originalProgress;
        }
        this.updateBarDisplay();
        
        // 创建滑动动画，先暂停0.4秒再滑动
        this.currentTween = tween({ progress: originalProgress })
            .delay(0.4) // 暂停0.4秒
            .to(0.3, { progress: newProgress }, {
                onUpdate: (target) => {
                    // 动画过程中更新黄色血条进度
                    if (this.yellowProgressBar && this.yellowProgressBar.isValid) {
                        this.yellowProgressBar.progress = target.progress;
                        this.updateBarDisplay();
                    }
                },
                onComplete: () => {
                    // 动画完成后黄色血条进度等于当前血量
                    if (this.yellowProgressBar && this.yellowProgressBar.isValid) {
                        this.yellowProgressBar.progress = newProgress;
                        this.updateBarDisplay();
                    }
                    // 清除动画引用
                    this.currentTween = null;
                    
                    // 动画完成后延迟隐藏血条
                    if (newProgress > 0) {
                        this.scheduleHideHealthBar(3.0); // 3秒后隐藏血条
                    }
                }
            })
            .start();
    }
    
    /**
     * 获取当前血量百分比
     */
    public getCurrentProgress(): number {
        return this.currentProgress;
    }
    
    /**
     * 重置血条到满血状态
     */
    public resetToFull() {
        this.updateProgress(1.0, false); // 重置时不显示血条
    }
    
    /**
     * 重置血条到满血状态并隐藏
     */
    public resetToFullAndHide() {
        this.currentProgress = 1.0;
        this.targetProgress = 1.0;
        
        // 同步更新两个血条到满血状态
        if (this.redProgressBar && this.redProgressBar.isValid) {
            this.redProgressBar.progress = 1.0;
        }
        if (this.yellowProgressBar && this.yellowProgressBar.isValid) {
            this.yellowProgressBar.progress = 1.0;
        }
        this.updateBarDisplay();
        
        // 立即隐藏血条
        this.hideHealthBar();
    }
    
    onDestroy() {
        // 清理正在运行的动画，防止内存泄漏
        if (this.currentTween) {
            this.currentTween.stop();
            this.currentTween = null;
        }
        
        // 清理隐藏血条的定时器，防止内存泄漏
        if (this.hideTimer) {
            clearTimeout(this.hideTimer);
            this.hideTimer = null;
        }
    }
    
    public updateBarPosition(force: boolean = false) {
        // 以血条节点作为基准（兼容脚本挂在 Enemy 或 HPBar 的两种情况）
        const barNode = (this.hpBarRootNode && this.hpBarRootNode.isValid) ? this.hpBarRootNode : this.node;
        const barPath = this.getNodePath(barNode);

        const enemyNode = barNode.parent;
        if (!enemyNode) {
            console.warn(`[HPBarAnimation] ${barPath} 未找到父节点(敌人根节点)，定位失败`);
            return;
        }

        // 先在同级父节点(敌人根)查找 EnemySprite，不存在则向上最多3级尝试
        let spriteNode: Node | null = enemyNode.getChildByName('EnemySprite');
        if (!spriteNode) {
            let ancestor = enemyNode.parent;
            let level = 1;
            while (!spriteNode && ancestor && level <= 3) {
                spriteNode = ancestor.getChildByName('EnemySprite');
                if (spriteNode) {
                    console.warn(`[HPBarAnimation] ${barPath} 在更高层级找到 EnemySprite: ${this.getNodePath(spriteNode)} (levelUp=${level})`);
                    break;
                }
                ancestor = ancestor.parent;
                level++;
            }
        }

        if (!spriteNode) {
            console.warn(`[HPBarAnimation] ${barPath} 未找到 EnemySprite（向上3级查找仍失败），敌人根: ${this.getNodePath(enemyNode)}`);
            return;
        }

        // 同时计算 UITransform 顶部与碰撞体顶部，最终取不低于图像顶部的值
        let colliderTopY: number | null = null;
        let uiTopY: number | null = null;
        let method = '';

        // 计算 UI 顶部
        const ui = spriteNode.getComponent(UITransform);
        if (ui) {
            const height = ui.contentSize.height * Math.abs(spriteNode.scale.y);
            uiTopY = spriteNode.position.y + (1 - ui.anchorPoint.y) * height;
        }

        // 计算碰撞体顶部（如有）
        const anyCollider = spriteNode.getComponent(Collider2D);
        if (anyCollider) {
            if (anyCollider instanceof BoxCollider2D) {
                const col = anyCollider as BoxCollider2D;
                colliderTopY = spriteNode.position.y + col.offset.y + col.size.height / 2;
            } else if (anyCollider instanceof CircleCollider2D) {
                const circle = anyCollider as CircleCollider2D;
                colliderTopY = spriteNode.position.y + circle.offset.y + circle.radius;
            }
        }

        let topY: number | null = null;
        if (this.useColliderForTop && colliderTopY !== null) {
            // 优先碰撞体，但不低于UI顶部
            topY = uiTopY !== null ? Math.max(colliderTopY, uiTopY) : colliderTopY;
            method = `ColliderPreferred(${anyCollider ? anyCollider.constructor.name : 'none'}) + clampToUI`;
        } else if (uiTopY !== null) {
            // 仅使用UITransform
            topY = uiTopY;
            method = `UITransform(height=${ui ? ui.contentSize.height : 'N/A'}, anchorY=${ui ? ui.anchorPoint.y : 'N/A'}, scaleY=${spriteNode.scale.y})`;
        } else if (colliderTopY !== null) {
            // 回退到碰撞体
            topY = colliderTopY;
            method = `ColliderOnly(${anyCollider ? anyCollider.constructor.name : 'none'})`;
        }

        if (topY === null) {
            console.warn(`[HPBarAnimation] ${barPath} EnemySprite 缺少 UITransform/Collider，无法计算顶部`);
            return;
        }

        // 将位置设置到血条节点自身（不要移动 Enemy 根节点）
        const current = barNode.position;
        const targetY = topY + this.offsetY;
        const moved = force || Math.abs(current.y - targetY) > 0.5;
        if (this.debugLogs) console.log(`[HPBarAnimation] 定位HPBar`, {
            barPath,
            enemyPath: this.getNodePath(enemyNode),
            spritePath: this.getNodePath(spriteNode),
            method,
            uiTopY,
            colliderTopY,
            topY,
            offsetY: this.offsetY,
            currentY: current.y,
            targetY,
            force,
            moved
        });
        if (moved) {
            barNode.setPosition(new Vec3(current.x, targetY, current.z));
        }
    }
}