import { _decorator, Component, Node, Label, find, JsonAsset } from 'cc';
import { SaveDataManager } from '../LevelSystem/SaveDataManager';
import EventBus, { GameEvents } from '../Core/EventBus';
import { JsonConfigLoader } from '../Core/JsonConfigLoader';

import { SkillManager } from './SkillSelection/SkillManager';
const { ccclass, property } = _decorator;

/**
 * 墙体组件
 * 负责管理墙体的血量、伤害处理、等级升级等功能
 */
@ccclass('Wall')
export class Wall extends Component {
    
    @property({
        type: Node,
        tooltip: '血量显示节点 (HeartLabel)'
    })
    public heartLabelNode: Node = null;

    // @property({
    //     type: JsonAsset,
    //     tooltip: '墙体配置文件'
    // })
    // public wallConfigAsset: JsonAsset = null;  // 已改为动态加载

    // === 私有属性 ===
    private currentHealth: number = 100;
    private heartLabel: Label = null;
    private saveDataManager: SaveDataManager = null;
    
    // 墙体配置数据
    private wallConfig: any = null;
    private wallHpMap: Record<number, number> = {};

    async start() {
        await this.initializeWall();
    }

    /**
     * 加载墙体配置
     */
    private async loadWallConfig(): Promise<void> {
        try {
            this.wallConfig = await JsonConfigLoader.getInstance().loadConfig('wall');
            if (this.wallConfig && this.wallConfig.wallConfig && this.wallConfig.wallConfig.healthByLevel) {
                // 转换字符串键为数字键
                const healthByLevel = this.wallConfig.wallConfig.healthByLevel;
                this.wallHpMap = {};
                for (const level in healthByLevel) {
                    this.wallHpMap[parseInt(level)] = healthByLevel[level];
                }
                console.log('[Wall] 墙体配置加载成功:', this.wallHpMap);
            } else {
                console.warn('[Wall] 配置文件格式错误，使用默认配置');
                this.useDefaultConfig();
            }
        } catch (error) {
            console.error('[Wall] 加载wall.json时出错:', error);
            this.useDefaultConfig();
        }
    }

    /**
     * 使用默认配置
     */
    private useDefaultConfig(): void {
        this.wallHpMap = {
            1: 100,
            2: 500,
            3: 1200,
            4: 1500,
            5: 2000
        };
    }

    /**
     * 初始化墙体
     */
    private async initializeWall() {
        // 初始化存档管理器
        this.saveDataManager = SaveDataManager.getInstance();
        if (!this.saveDataManager) {
            console.error('[Wall] SaveDataManager not found');
            return;
        }

        // 加载墙体配置
        await this.loadWallConfig();
        
        // 查找血量显示节点
        this.findHeartLabelNode();
        
        // 从存档读取墙体血量
        this.loadWallHealthFromSave();
        
        // 初始化血量显示
        this.updateHealthDisplay();
        
        // 监听治疗技能变化
        this.setupSkillListeners();
        
        // 设置事件监听器
        this.setupEventListeners();
    }

    /**
     * 查找血量显示节点
     */
    private findHeartLabelNode() {
        // 查找心血显示节点
        if (!this.heartLabelNode) {
            this.heartLabelNode = find('Canvas-001/TopArea/HeartNode/HeartLabel') || find('Canvas/GameLevelUI/HeartNode/HeartLabel');
        }
        
        if (this.heartLabelNode) {
            this.heartLabel = this.heartLabelNode.getComponent(Label);
        }
    }

    /**
     * 从存档加载墙体血量
     */
    private loadWallHealthFromSave() {
        // 直接从SaveDataManager获取当前墙体血量
        this.currentHealth = this.saveDataManager.getWallHealth();
        console.log('[Wall] 从配置加载墙体血量:', this.currentHealth);
        
        // 确保当前血量不超过最大血量（考虑技能加成）
        const maxHealth = this.getMaxHealth();
        if (this.currentHealth > maxHealth) {
            this.currentHealth = maxHealth;
        }
    }

    /**
     * 墙体受到伤害
     */
    public takeDamage(damage: number) {
        if (damage <= 0) return;

        const previousHealth = this.currentHealth;
        this.currentHealth = Math.max(0, this.currentHealth - damage);
        
        // 触发受到伤害事件
        const eventBus = EventBus.getInstance();
        eventBus.emit(GameEvents.WALL_TAKE_DAMAGE, {
            damage: damage,
            previousHealth: previousHealth,
            currentHealth: this.currentHealth
        });
        
        // 触发血量变化事件
        eventBus.emit(GameEvents.WALL_HEALTH_CHANGED, {
            previousHealth: previousHealth,
            currentHealth: this.currentHealth,
            maxHealth: this.getMaxHealth()
        });
        
        // 更新血量显示
        this.updateHealthDisplay();
        
        console.log(`[Wall] 墙体受到伤害: ${damage}, 当前血量: ${this.currentHealth}`);
        
        // 检查墙体是否被摧毁
        if (this.currentHealth <= 0) {
            this.onWallDestroyed();
        }
    }

    /**
     * 墙体被摧毁时的处理
     * 统一与菜单退出的失败处理流程，直接触发GAME_DEFEAT事件
     */
    private onWallDestroyed() {
        console.log('[Wall] 墙体被摧毁，触发游戏失败');
        
        // 通过事件系统触发墙体被摧毁事件（保留用于其他监听器）
        const eventBus = EventBus.getInstance();
        eventBus.emit(GameEvents.WALL_DESTROYED, {
            finalHealth: this.currentHealth,
            maxHealth: this.getMaxHealth()
        });
        
        // 统一失败处理：直接触发GAME_DEFEAT事件，与菜单退出处理保持一致
        console.log('[Wall] 直接触发GAME_DEFEAT事件，与菜单退出失败处理流程一致');
        eventBus.emit(GameEvents.GAME_DEFEAT);
    }

    /**
     * 更新血量显示
     */
    public updateHealthDisplay() {
        if (this.heartLabel) {
            this.heartLabel.string = Math.floor(this.currentHealth).toString();
        }
    }

    /**
     * 设置墙体血量
     */
    public setHealth(health: number) {
        const previousHealth = this.currentHealth;
        this.currentHealth = Math.max(0, health);
        
        // 如果血量发生变化，触发血量变化事件
        if (previousHealth !== this.currentHealth) {
            const eventBus = EventBus.getInstance();
            eventBus.emit(GameEvents.WALL_HEALTH_CHANGED, {
                previousHealth: previousHealth,
                currentHealth: this.currentHealth,
                maxHealth: this.getMaxHealth()
            });
        }
        
        this.updateHealthDisplay();
    }

    /**
     * 获取当前墙体血量
     */
    public getCurrentHealth(): number {
        return this.currentHealth;
    }

    /**
     * 获取最大血量（基于当前等级和技能加成）
     */
    public getMaxHealth(): number {
        const currentLevel = this.getCurrentWallLevel();
        const baseMaxHealth = this.getWallHealthByLevel(currentLevel);
        
        // 应用治疗技能的最大血量加成
        const skillManager = SkillManager.getInstance();
        if (skillManager) {
            const healSkillLevel = skillManager.getSkillLevel('heal');
            const healthBonus = SkillManager.getHealSkillHealthBonus(healSkillLevel);
            return Math.floor(baseMaxHealth * (1 + healthBonus));
        }
        
        return baseMaxHealth;
    }

    /**
     * 根据等级获取墙体血量
     */
    public getWallHealthByLevel(level: number): number {
        // 使用本地配置
        return this.wallHpMap[level] || (100 + (level - 1) * 200);
    }

    /**
     * 获取当前墙壁等级
     */
    public getCurrentWallLevel(): number {
        return this.saveDataManager?.getWallLevel() || 1;
    }



    /**
     * 恢复墙体血量
     */
    public heal(amount: number) {
        const previousHealth = this.currentHealth;
        const maxHealth = this.getMaxHealth();
        this.currentHealth = Math.min(maxHealth, this.currentHealth + amount);
        
        // 如果血量发生变化，触发血量变化事件
        if (previousHealth !== this.currentHealth) {
            const eventBus = EventBus.getInstance();
            eventBus.emit(GameEvents.WALL_HEALTH_CHANGED, {
                previousHealth: previousHealth,
                currentHealth: this.currentHealth,
                maxHealth: maxHealth,
                healAmount: this.currentHealth - previousHealth
            });
        }
        
        this.updateHealthDisplay();
    }

    /**
     * 重置墙体血量到满血
     */
    public resetToFullHealth() {
        this.currentHealth = this.getMaxHealth();
        this.updateHealthDisplay();
    }

    /**
     * 获取血量百分比
     */
    public getHealthPercentage(): number {
        const maxHealth = this.getMaxHealth();
        return maxHealth > 0 ? this.currentHealth / maxHealth : 0;
    }

    /**
     * 检查墙体是否存活
     */
    public isAlive(): boolean {
        return this.currentHealth > 0;
    }
    
    /**
     * 设置事件监听器
     */
    private setupEventListeners() {
        const eventBus = EventBus.getInstance();
        
        // 监听重置墙体血量事件
        eventBus.on(GameEvents.RESET_WALL_HEALTH, this.onResetWallHealthEvent, this);
        
        // 监听墙体血量变化事件（用于升级后更新显示）
        eventBus.on(GameEvents.WALL_HEALTH_CHANGED, this.onWallHealthChangedEvent, this);
    }
    
    /**
     * 处理重置墙体血量事件
     */
    private onResetWallHealthEvent() {
        console.log('[Wall] 接收到重置墙体血量事件，重置到满血');
        this.resetToFullHealth();
    }
    
    /**
     * 处理墙体血量变化事件（用于升级后更新）
     */
    private onWallHealthChangedEvent(eventData?: any) {
        // 只有在特定情况下才重新加载存档数据，避免覆盖受伤后的血量
        // 如果事件数据包含isUpgrade标志，说明是升级触发的，需要重新加载
        if (eventData && eventData.isUpgrade) {
            console.log('[Wall] 接收到墙体升级事件，重新加载血量数据');
            this.loadWallHealthFromSave();
            this.updateHealthDisplay();
        }
        // 其他情况（如受伤、治疗）不需要重新加载存档，血量已经在相应方法中更新
    }
    
    /**
     * 设置技能监听器
     */
    private setupSkillListeners() {
        const skillManager = SkillManager.getInstance();
        if (skillManager) {
            // 监听治疗技能变化
            skillManager.onSkillChanged('heal', this.onHealSkillChanged.bind(this));
        }
    }
    
    /**
     * 治疗技能变化回调
     */
    private onHealSkillChanged(skillId: string, level: number) {
        console.log(`[Wall] 治疗技能等级变化: ${level}`);
        
        // 技能升级时，墙体最大血量可能增加，需要更新显示
        this.updateHealthDisplay();
        
        // 如果当前血量低于新的最大血量，可以考虑给予一些额外治疗
        // 这里暂时不做额外处理，因为SkillSelectionController已经处理了即时治疗
    }
    
    /**
     * 清理技能监听器
     */
    private cleanupSkillListeners() {
        const skillManager = SkillManager.getInstance();
        if (skillManager) {
            skillManager.offSkillChanged('heal', this.onHealSkillChanged.bind(this));
        }
    }
    
    onDestroy() {
        // 清理事件监听
        const eventBus = EventBus.getInstance();
        eventBus.off(GameEvents.RESET_WALL_HEALTH, this.onResetWallHealthEvent, this);
        eventBus.off(GameEvents.WALL_HEALTH_CHANGED, this.onWallHealthChangedEvent, this);
        
        this.cleanupSkillListeners();
    }
}