import { _decorator, Component, Node, Vec3, find, instantiate, Prefab, UITransform, resources, sp, CircleCollider2D } from 'cc';
import { BulletTrajectory } from './BulletTrajectory';
const { ccclass, property } = _decorator;

/**
 * 命中效果控制器
 * 负责处理可叠加的命中效果
 */

export interface HitEffectConfig {
    type: 'normal_damage' | 'pierce_damage' | 'explosion' | 'ground_burn' | 'ricochet_damage';
    priority: number;      // 优先级，数字越小优先级越高
    params: any;          // 效果参数
}

export interface ExplosionParams {
    damage: number;
    radius: number;
    delay: number;
}

export interface PierceParams {
    damage: number;
    pierceCount: number;
}

export interface BurnParams {
    damage: number;
    duration: number;
    radius: number;
    tickInterval: number;
}

export interface RicochetParams {
    damage: number;
    ricochetCount: number;
    ricochetAngle: number;
}

export interface HitResult {
    shouldDestroy: boolean;    // 是否应该销毁子弹
    shouldContinue: boolean;   // 是否应该继续飞行
    shouldRicochet: boolean;   // 是否应该弹射
    damageDealt: number;       // 造成的伤害
}

@ccclass('BulletHitEffect')
export class BulletHitEffect extends Component {
    private hitEffects: HitEffectConfig[] = [];
    private hitCount: number = 0;
    private pierceCount: number = 0;
    private ricochetCount: number = 0;
    private activeBurnAreas: Node[] = [];
    
    // 默认特效路径（从WeaponBullet传入）
    private defaultHitEffectPath: string = '';
    private defaultTrailEffectPath: string = '';
    private defaultBurnEffectPath: string = '';

    public setDefaultEffects(hit: string | null, trail?: string | null, burn?: string | null) {
        if (hit) this.defaultHitEffectPath = hit;
        if (trail) this.defaultTrailEffectPath = trail;
        if (burn) this.defaultBurnEffectPath = burn;
    }
    
    /**
     * 初始化命中效果
     */
    public init(effects: HitEffectConfig[]) {
        // 按优先级排序
        this.hitEffects = [...effects].sort((a, b) => a.priority - b.priority);
    }
    
    /**
     * 处理命中事件
     */
    public processHit(hitNode: Node, contactPos: Vec3): HitResult {
        this.hitCount++;
        
        const result: HitResult = {
            shouldDestroy: false,
            shouldContinue: false,
            shouldRicochet: false,
            damageDealt: 0
        };
        
        // 按优先级处理所有效果
        for (const effect of this.hitEffects) {
            const effectResult = this.processEffect(effect, hitNode, contactPos);
            
            // 累积伤害
            result.damageDealt += effectResult.damageDealt;
            
            // 处理控制逻辑（OR逻辑，任何一个效果要求的行为都会执行）
            if (effectResult.shouldDestroy) result.shouldDestroy = true;
            if (effectResult.shouldContinue) result.shouldContinue = true;
            if (effectResult.shouldRicochet) result.shouldRicochet = true;
        }
        
        // 逻辑优先级：销毁 > 弹射 > 继续
        if (result.shouldDestroy) {
            result.shouldContinue = false;
            result.shouldRicochet = false;
        } else if (result.shouldRicochet) {
            result.shouldContinue = false;
        }
        
        return result;
    }
    
    /**
     * 处理单个效果
     */
    private processEffect(effect: HitEffectConfig, hitNode: Node, contactPos: Vec3): HitResult {
        const result: HitResult = {
            shouldDestroy: false,
            shouldContinue: false,
            shouldRicochet: false,
            damageDealt: 0
        };
        
        switch (effect.type) {
            case 'normal_damage':
                result.damageDealt = this.processNormalDamage(effect.params, hitNode);
                result.shouldDestroy = true;
                break;
                
            case 'pierce_damage':
                result.damageDealt = this.processPierceDamage(effect.params as PierceParams, hitNode);
                break;
                
            case 'explosion':
                result.damageDealt = this.processExplosion(effect.params as ExplosionParams, contactPos);
                result.shouldDestroy = true;
                break;
                
            case 'ground_burn':
                this.processGroundBurn(effect.params as BurnParams, contactPos);
                break;
                
            case 'ricochet_damage':
                result.damageDealt = this.processRicochetDamage(effect.params as RicochetParams, hitNode);
                result.shouldRicochet = this.ricochetCount < (effect.params as RicochetParams).ricochetCount;
                break;
        }
        
        return result;
    }
    
    /**
     * 处理普通伤害
     */
    private processNormalDamage(params: any, hitNode: Node): number {
        // 使用WeaponBullet的最终伤害值而不是配置中的基础伤害
        const weaponBullet = this.getComponent('WeaponBullet') as any;
        const damage = weaponBullet ? weaponBullet.getFinalDamage() : (params.damage || 0);
        
        console.log(`[BulletHitEffect] 普通伤害处理 - 配置伤害: ${params.damage || 0}, 最终伤害: ${damage}`);
        
        this.damageEnemy(hitNode, damage);
        this.spawnHitEffect(hitNode.worldPosition);
        return damage;
    }
    
    /**
     * 处理穿透伤害
     */
    private processPierceDamage(params: PierceParams, hitNode: Node): number {
        // 使用WeaponBullet的最终伤害值而不是配置中的基础伤害
        const weaponBullet = this.getComponent('WeaponBullet') as any;
        const damage = weaponBullet ? weaponBullet.getFinalDamage() : (params.damage || 0);
        
        console.log(`[BulletHitEffect] 穿透伤害处理 - 配置伤害: ${params.damage || 0}, 最终伤害: ${damage}`);
        
        this.damageEnemy(hitNode, damage);
        this.spawnHitEffect(hitNode.worldPosition);
        this.pierceCount++;
        return damage;
    }
    
    /**
     * 处理爆炸效果
     */
    private processExplosion(params: ExplosionParams, position: Vec3): number {
        // 使用WeaponBullet的最终伤害值而不是配置中的基础伤害
        const weaponBullet = this.getComponent('WeaponBullet') as any;
        const finalDamage = weaponBullet ? weaponBullet.getFinalDamage() : (params.damage || 0);
        
        console.log(`[BulletHitEffect] 爆炸伤害处理 - 配置伤害: ${params.damage || 0}, 最终伤害: ${finalDamage}`);
        
        const scheduleExplosion = () => {
            // 生成爆炸特效
            this.spawnExplosionEffect(position);
            
            // 对范围内敌人造成伤害
            const damage = this.damageEnemiesInRadius(position, params.radius, finalDamage);
            return damage;
        };
        
        if (params.delay > 0) {
            this.scheduleOnce(scheduleExplosion, params.delay);
            return 0; // 延迟爆炸，当前不造成伤害
        } else {
            return scheduleExplosion();
        }
    }
    
    /**
     * 处理地面灼烧效果
     */
    private processGroundBurn(params: BurnParams, position: Vec3) {
        // 创建灼烧区域节点
        const burnArea = new Node('BurnArea');
        const gameArea = find('Canvas/GameLevelUI/GameArea');
        if (gameArea) {
            gameArea.addChild(burnArea);
            
            // 设置位置
            const localPos = gameArea.getComponent(UITransform)?.convertToNodeSpaceAR(position) || new Vec3();
            burnArea.position = localPos;
            
            // 添加碰撞体用于检测范围
            const collider = burnArea.addComponent(CircleCollider2D);
            collider.radius = params.radius;
            collider.sensor = true; // 设为传感器
            
            // 生成灼烧特效
            this.spawnBurnEffect(burnArea);
            
            // 定时造成伤害
            let remainingTime = params.duration;
            const damageTimer = () => {
                if (remainingTime <= 0 || !burnArea.isValid) {
                    burnArea.destroy();
                    return;
                }
                
                // 对范围内敌人造成伤害
                this.damageEnemiesInRadius(position, params.radius, params.damage);
                
                remainingTime -= params.tickInterval;
                this.scheduleOnce(damageTimer, params.tickInterval);
            };
            
            this.scheduleOnce(damageTimer, params.tickInterval);
            this.activeBurnAreas.push(burnArea);
        }
    }
    
    /**
     * 处理弹射伤害
     */
    private processRicochetDamage(params: RicochetParams, hitNode: Node): number {
        // 使用WeaponBullet的最终伤害值而不是配置中的基础伤害
        const weaponBullet = this.getComponent('WeaponBullet') as any;
        const damage = weaponBullet ? weaponBullet.getFinalDamage() : (params.damage || 0);
        
        console.log(`[BulletHitEffect] 弹射伤害处理 - 配置伤害: ${params.damage || 0}, 最终伤害: ${damage}`);
        
        this.damageEnemy(hitNode, damage);
        
        if (this.ricochetCount < params.ricochetCount) {
            this.ricochetCount++;
            
            // 计算弹射方向
            this.calculateRicochetDirection(params.ricochetAngle);
        }
        
        return damage;
    }
    
    /**
     * 计算弹射方向
     */
    private calculateRicochetDirection(maxAngle: number) {
        const trajectory = this.getComponent(BulletTrajectory);
        if (!trajectory) return;
        
        // 获取当前速度方向
        const currentVel = trajectory.getCurrentVelocity();
        
        // 随机弹射角度
        const angleRad = (Math.random() - 0.5) * maxAngle * Math.PI / 180;
        const cos = Math.cos(angleRad);
        const sin = Math.sin(angleRad);
        
        // 应用旋转
        const newDirection = new Vec3(
            currentVel.x * cos - currentVel.y * sin,
            currentVel.x * sin + currentVel.y * cos,
            0
        ).normalize();
        
        // 使用弹道组件的changeDirection方法
        trajectory.changeDirection(newDirection);
    }
    
    /**
     * 对单个敌人造成伤害
     */
    private damageEnemy(enemyNode: Node, damage: number) {
        if (!this.isEnemyNode(enemyNode)) return;
        
        // 计算暴击伤害和暴击状态
        const damageResult = this.calculateCriticalDamage(damage);
        
        // 尝试调用敌人的受伤方法
        const enemyInstance = enemyNode.getComponent('EnemyInstance') as any;
        if (enemyInstance) {
            if (typeof enemyInstance.takeDamage === 'function') {
                enemyInstance.takeDamage(damageResult.damage, damageResult.isCritical);
                return;
            }
            if (typeof enemyInstance.health === 'number') {
                enemyInstance.health -= damageResult.damage;
                if (enemyInstance.health <= 0) {
                    enemyNode.destroy();
                }
                return;
            }
        }
        
        // 备用方案：通过EnemyController
        const enemyController = find('Canvas/GameLevelUI/EnemyController')?.getComponent('EnemyController') as any;
        if (enemyController && typeof enemyController.damageEnemy === 'function') {
            enemyController.damageEnemy(enemyNode, damageResult.damage, damageResult.isCritical);
        }
    }
    
    /**
     * 计算暴击伤害
     */
    private calculateCriticalDamage(baseDamage: number): { damage: number, isCritical: boolean } {
        // 从WeaponBullet获取暴击相关数值
        const weaponBullet = this.getComponent('WeaponBullet') as any;
        if (!weaponBullet) {
            // 如果没有WeaponBullet组件，使用基础暴击率10%
            const critChance = 0.1;
            const isCritical = Math.random() < critChance;
            
            if (isCritical) {
                const critDamage = baseDamage * 2; // 默认暴击倍数2倍
                this.showCriticalHitEffect();
                console.log(`[BulletHitEffect] 暴击！基础伤害: ${baseDamage}, 暴击伤害: ${critDamage}, 暴击率: ${(critChance * 100).toFixed(1)}%`);
                return { damage: critDamage, isCritical: true };
            }
            return { damage: baseDamage, isCritical: false };
        }
        
        // 获取暴击率和暴击伤害
        const critChance = weaponBullet.getCritChance();
        const critDamage = weaponBullet.getFinalCritDamage();
        
        // 检查是否触发暴击
        const isCritical = Math.random() < critChance;
        
        if (isCritical) {
            // 显示暴击特效
            this.showCriticalHitEffect();
            
            console.log(`[BulletHitEffect] 暴击！基础伤害: ${baseDamage}, 暴击伤害: ${critDamage}, 暴击率: ${(critChance * 100).toFixed(1)}%`);
            
            return { damage: critDamage, isCritical: true };
        }
        
        return { damage: baseDamage, isCritical: false };
    }
    
    /**
     * 显示暴击特效
     */
    private showCriticalHitEffect() {
        // 这里可以添加暴击特效，比如特殊的粒子效果或音效
        // 暂时只在控制台输出，后续可以扩展
        console.log('[BulletHitEffect] 暴击特效触发！');
    }
    
    /**
     * 对范围内敌人造成伤害
     */
    private damageEnemiesInRadius(center: Vec3, radius: number, damage: number): number {
        const enemyContainer = find('Canvas/GameLevelUI/enemyContainer');
        if (!enemyContainer) return 0;
        
        let totalDamage = 0;
        const enemies = enemyContainer.children.filter(child => 
            child.active && this.isEnemyNode(child)
        );
        
        // 获取WeaponBullet组件以使用最终伤害值
        const weaponBullet = this.getComponent('WeaponBullet') as any;
        const baseDamage = weaponBullet ? weaponBullet.getFinalDamage() : damage;
        
        for (const enemy of enemies) {
            const distance = Vec3.distance(center, enemy.worldPosition);
            if (distance <= radius) {
                // 每个敌人独立计算暴击
                const damageResult = this.calculateCriticalDamage(baseDamage);
                
                // 直接处理伤害，避免重复计算暴击
                this.applyDamageToEnemy(enemy, damageResult.damage, damageResult.isCritical);
                totalDamage += damageResult.damage;
            }
        }
        
        return totalDamage;
    }
    
    /**
     * 直接对敌人应用伤害（不进行暴击计算）
     */
    private applyDamageToEnemy(enemyNode: Node, damage: number, isCritical: boolean = false) {
        if (!this.isEnemyNode(enemyNode)) return;
        
        // 尝试调用敌人的受伤方法
        const enemyInstance = enemyNode.getComponent('EnemyInstance') as any;
        if (enemyInstance) {
            if (typeof enemyInstance.takeDamage === 'function') {
                enemyInstance.takeDamage(damage, isCritical);
                return;
            }
            if (typeof enemyInstance.health === 'number') {
                enemyInstance.health -= damage;
                if (enemyInstance.health <= 0) {
                    enemyNode.destroy();
                }
                return;
            }
        }
        
        // 备用方案：通过EnemyController
        const enemyController = find('Canvas/GameLevelUI/EnemyController')?.getComponent('EnemyController') as any;
        if (enemyController && typeof enemyController.damageEnemy === 'function') {
            enemyController.damageEnemy(enemyNode, damage, isCritical);
        }
    }
    
    /**
     * 判断是否为敌人节点
     */
    private isEnemyNode(node: Node): boolean {
        const name = node.name.toLowerCase();
        return name.includes('enemy') || 
               name.includes('敌人') ||
               node.getComponent('EnemyInstance') !== null;
    }
    
    /**
     * 生成爆炸特效
     */
    private spawnExplosionEffect(position: Vec3) {
        const path = this.defaultHitEffectPath || 'Animation/tx/tx0004';
        this.spawnEffect(path, position, false);
    }
    
    /**
     * 生成灼烧特效
     */
    private spawnBurnEffect(parent: Node) {
        const path = this.defaultBurnEffectPath || this.defaultTrailEffectPath || 'Animation/tx/tx0006';
        this.spawnEffect(path, new Vec3(), true, parent);
    }
    
    /**
     * 生成特效
     */
    private spawnEffect(path: string, worldPos: Vec3, loop = false, parent?: Node) {
        if (!path) return;

        const spawnWithData = (skData: sp.SkeletonData) => {
            const effectNode = new Node('Effect');
            const skeletonComp: sp.Skeleton = effectNode.addComponent(sp.Skeleton);
            skeletonComp.skeletonData = skData;
            skeletonComp.setAnimation(0, 'animation', loop);

            const targetParent = parent || find('Canvas/GameLevelUI/GameArea') || find('Canvas');
            if (targetParent) {
                targetParent.addChild(effectNode);
                if (parent) {
                    effectNode.setPosition(0, 0, 0);
                } else {
                    const parentTrans = targetParent.getComponent(UITransform);
                    if (parentTrans) {
                        const localPos = parentTrans.convertToNodeSpaceAR(worldPos);
                        effectNode.position = localPos;
                    }
                }
            }

            if (!loop) {
                skeletonComp.setCompleteListener(() => {
                    effectNode.destroy();
                });
            }
        };

        // 先尝试直接加载给定路径
        resources.load(path, sp.SkeletonData, (err, skData: sp.SkeletonData) => {
            if (err) {
                console.warn('加载特效失败:', path, err);
                return;
            }
            spawnWithData(skData);
        });
    }
    
    /**
     * 清理资源
     */
    onDestroy() {
        // 清理激活的灼烧区域
        for (const burnArea of this.activeBurnAreas) {
            if (burnArea && burnArea.isValid) {
                burnArea.destroy();
            }
        }
        this.activeBurnAreas = [];
    }
    
    /**
     * 获取命中统计
     */
    public getHitStats() {
        return {
            hitCount: this.hitCount,
            pierceCount: this.pierceCount,
            ricochetCount: this.ricochetCount
        };
    }
    
    /**
     * 验证配置
     */
    public static validateConfig(effects: HitEffectConfig[]): boolean {
        if (!Array.isArray(effects) || effects.length === 0) return false;
        
        for (const effect of effects) {
            if (!effect.type || effect.priority < 0) return false;
            if (!effect.params) return false;
        }
        
        return true;
    }
    
    private spawnHitEffect(worldPos: Vec3) {
        const path = this.defaultHitEffectPath;
        if (path) {
            this.spawnEffect(path, worldPos, false);
        }
    }
}