tanqiu/assets/scripts/CombatSystem/EnemyWeapon/EnemyProjectileInstance.ts

import { _decorator, Component, Node, Vec3, RigidBody2D, Collider2D, Contact2DType, IPhysics2DContact, Sprite, find, SpriteFrame } from 'cc';
import { BundleLoader } from '../../Core/BundleLoader';
import { Audio } from '../../AudioManager/AudioManager';
import EventBus, { GameEvents } from '../../Core/EventBus';

const { ccclass, property } = _decorator;

/**
 * 敌人抛掷物实例组件
 * 负责处理单个抛掷物的移动、碰撞和伤害
 * 此组件应该挂载到抛掷物预制体上
 */
@ccclass('EnemyProjectileInstance')
export class EnemyProjectileInstance extends Component {
    
    // 抛掷物属性
    private damage: number = 10;
    private speed: number = 100;
    private direction: Vec3 = new Vec3(0, -1, 0); // 默认向下
    private projectileType: string = 'arrow';
    
    // 组件引用
    private rigidBody: RigidBody2D = null;
    private collider: Collider2D = null;
    private sprite: Sprite = null;
    
    // 生命周期
    private maxLifetime: number = 5.0; // 最大存活时间
    private currentLifetime: number = 0;
    
    // 弧线弹道相关属性
    private useArcTrajectory: boolean = true; // 是否使用弧线弹道
    private arcDir: Vec3 = null; // 当前方向
    private arcTargetDir: Vec3 = null; // 目标方向
    private targetWallPosition: Vec3 = null; // 目标墙体位置
    private rotateSpeed: number = 2.0; // 转向速度
    
    onLoad() {
        console.log('[EnemyProjectileInstance] 抛掷物实例组件已加载');
        this.setupComponents();
        this.setupProjectileSprite();
    }
    
    start() {
        this.setupCollisionListener();
    }
    
    update(deltaTime: number) {
        // 如果已被标记为销毁，停止更新
        if (this.isDestroyed) {
            return;
        }
        
        // 更新生命周期
        this.currentLifetime += deltaTime;
        if (this.currentLifetime >= this.maxLifetime) {
            console.log('[EnemyProjectileInstance] 抛掷物超时，自动销毁');
            this.isDestroyed = true;
            this.destroyProjectile();
            return;
        }
        
        // 根据弹道类型移动抛掷物
        if (this.useArcTrajectory) {
            this.updateArcTrajectory(deltaTime);
        } else {
            this.moveProjectile(deltaTime);
        }
    }
    
    /**
     * 初始化抛掷物
     * @param config 抛掷物配置
     */
    public init(config: {
        damage: number;
        speed: number;
        direction: Vec3;
        projectileType: string;
        startPosition: Vec3;
    }) {
        console.log('[EnemyProjectileInstance] 初始化抛掷物配置:', config);
        
        this.damage = config.damage;
        this.speed = config.speed;
        this.direction = config.direction.clone().normalize();
        this.projectileType = config.projectileType;
        
        // 注意：不在这里设置位置，因为节点还没有添加到Canvas
        // 位置设置由EnemyProjectile.ts在添加到Canvas后处理
        
        // 初始化弧线弹道
        this.initArcTrajectory();
        
        // 根据类型刷新外观（异步加载）
        this.setupProjectileSprite();
        
        console.log(`[EnemyProjectileInstance] 初始化抛掷物完成: 类型=${this.projectileType}, 伤害=${this.damage}, 速度=${this.speed}`);
        console.log('[EnemyProjectileInstance] 起始位置:', config.startPosition);
    }
    
    /**
     * 获取预制体中已配置的组件
     */
    private setupComponents() {
        // 获取预制体中已配置的刚体组件
        this.rigidBody = this.getComponent(RigidBody2D);
        if (!this.rigidBody) {
            console.error('[EnemyProjectileInstance] 预制体中未找到RigidBody2D组件');
        } else {
            console.log('[EnemyProjectileInstance] 找到RigidBody2D组件');
        }
        
        // 获取预制体中已配置的碰撞器组件
        this.collider = this.getComponent(Collider2D);
        if (!this.collider) {
            console.error('[EnemyProjectileInstance] 预制体中未找到Collider2D组件');
        } else {
            console.log('[EnemyProjectileInstance] 找到Collider2D组件');
        }
        
        // 获取预制体中已配置的精灵组件
        this.sprite = this.getComponent(Sprite);
        if (!this.sprite) {
            console.error('[EnemyProjectileInstance] 预制体中未找到Sprite组件');
        } else {
            console.log('[EnemyProjectileInstance] 找到Sprite组件');
        }
    }
    
    /**
     * 设置抛掷物外观：
     * - 法师僵尸 (magic_bolt) 使用 Animation/EnemyAni/003/ball.png
     * - 其它类型保持预制体默认图片
     */
    private async setupProjectileSprite() {
        if (!this.sprite) return;

        try {
            if (this.projectileType === 'magic_bolt') {
                const loader = BundleLoader.getInstance();
                const framePath = 'EnemyAni/003/ball/spriteFrame';
                const spriteFrame = await loader.loadAssetFromBundle<SpriteFrame>('Animation', framePath, SpriteFrame);
                if (spriteFrame && this.sprite && this.sprite.isValid) {
                    this.sprite.spriteFrame = spriteFrame;
                    console.log('[EnemyProjectileInstance] 已应用法师抛掷物外观: ball.png');
                }
            } else {
                // 保持预制体默认图片（例如弓箭手箭矢），不做修改
                console.log(`[EnemyProjectileInstance] 使用默认抛掷物外观，类型=${this.projectileType}`);
            }
        } catch (err) {
            console.error('[EnemyProjectileInstance] 加载抛掷物SpriteFrame失败', err);
        }
    }
    
    /**
     * 设置碰撞监听
     */
    private setupCollisionListener() {
        if (this.collider) {
            this.collider.on(Contact2DType.BEGIN_CONTACT, this.onBeginContact, this);
            console.log('[EnemyProjectileInstance] 碰撞监听设置完成');
        }
    }
    
    /**
     * 移动抛掷物
     */
    private moveProjectile(deltaTime: number) {
        if (!this.rigidBody) return;
        
        // 计算移动向量
        const moveVector = this.direction.clone().multiplyScalar(this.speed * deltaTime);
        
        // 获取当前位置并添加移动向量
        const currentPos = this.node.getWorldPosition();
        const newPos = currentPos.add(moveVector);
        
        // 设置新位置
        this.node.setWorldPosition(newPos);
    }
    
    /**
     * 初始化弧线弹道
     */
    private initArcTrajectory() {
        if (!this.useArcTrajectory) return;
        
        // 寻找最近的墙体作为目标
        this.findNearestWall();
        
        // 计算带45°随机偏移的初始方向
        const baseDir = this.direction.clone().normalize();
        const sign = Math.random() < 0.5 ? 1 : -1;
        const rad = 45 * Math.PI / 180 * sign;
        const cos = Math.cos(rad);
        const sin = Math.sin(rad);
        const offsetDir = new Vec3(
            baseDir.x * cos - baseDir.y * sin,
            baseDir.x * sin + baseDir.y * cos,
            0
        ).normalize();
        
        this.arcDir = offsetDir;
        
        // 如果找到了目标墙体，设置目标方向
        if (this.targetWallPosition) {
            const currentPos = this.node.getWorldPosition();
            const dirToWall = this.targetWallPosition.clone().subtract(currentPos).normalize();
            this.arcTargetDir = dirToWall;
        } else {
            // 如果没有找到墙体，使用基础方向
            this.arcTargetDir = baseDir;
        }
        
        console.log(`[EnemyProjectileInstance] 初始化弧线弹道: 目标墙体位置=${this.targetWallPosition}`);
    }
    
    /**
     * 寻找最近的墙体
     */
    private findNearestWall() {
        const currentPos = this.node.getWorldPosition();
        let nearestWall: Node = null;
        let nearestDistance = Infinity;
        
        // 方法1：通过EnemyController获取墙体节点
        const enemyController = find('Canvas/GameLevelUI/EnemyController')?.getComponent('EnemyController') as any;
        if (enemyController) {
            const wallNodes = [];
            if (enemyController.topFenceNode) wallNodes.push(enemyController.topFenceNode);
            if (enemyController.bottomFenceNode) wallNodes.push(enemyController.bottomFenceNode);
            
            for (const wall of wallNodes) {
                if (wall && wall.active) {
                    const distance = Vec3.distance(currentPos, wall.getWorldPosition());
                    if (distance < nearestDistance) {
                        nearestDistance = distance;
                        nearestWall = wall;
                    }
                }
            }
        }
        
        // 方法2：在GameArea中搜索墙体节点
        if (!nearestWall) {
            const gameArea = find('Canvas/GameLevelUI/GameArea');
            if (gameArea) {
                for (let i = 0; i < gameArea.children.length; i++) {
                    const child = gameArea.children[i];
                    if (this.isWallNode(child) && child.active) {
                        const distance = Vec3.distance(currentPos, child.getWorldPosition());
                        if (distance < nearestDistance) {
                            nearestDistance = distance;
                            nearestWall = child;
                        }
                    }
                }
            }
        }
        
        // 方法3：直接搜索常见墙体路径
        if (!nearestWall) {
            const wallPaths = [
                'Canvas/GameLevelUI/GameArea/TopFence',
                'Canvas/GameLevelUI/GameArea/BottomFence',
                'Canvas/GameLevelUI/Wall',
                'Canvas/Wall',
                'Canvas/TopWall',
                'Canvas/BottomWall'
            ];
            
            for (const path of wallPaths) {
                const wall = find(path);
                if (wall && wall.active) {
                    const distance = Vec3.distance(currentPos, wall.getWorldPosition());
                    if (distance < nearestDistance) {
                        nearestDistance = distance;
                        nearestWall = wall;
                    }
                }
            }
        }
        
        // 设置目标墙体位置
        if (nearestWall) {
            this.targetWallPosition = nearestWall.getWorldPosition().clone();
        }
    }

    private updateArcTrajectory(deltaTime: number) {
        if (!this.arcDir || !this.arcTargetDir) {
            this.moveProjectile(deltaTime);
            return;
        }

        // 平滑转向到目标方向
        const currentDir = this.arcDir.clone();
        const targetDir = this.arcTargetDir.clone();

        // 插值计算新方向
        const lerpFactor = Math.min(1, this.rotateSpeed * deltaTime);
        const newDir = new Vec3(
            currentDir.x + (targetDir.x - currentDir.x) * lerpFactor,
            currentDir.y + (targetDir.y - currentDir.y) * lerpFactor,
            0
        ).normalize();

        this.arcDir = newDir;
        this.direction = newDir;

        // 以当前方向移动
        this.moveProjectile(deltaTime);
    }

    private isDestroyed: boolean = false;

    private onBeginContact(selfCollider: Collider2D, otherCollider: Collider2D, contact: IPhysics2DContact | null) {
        if (this.isDestroyed) return;

        const otherNode = otherCollider.node;
        const otherPath = this.getNodePath(otherNode);
        console.log(`[EnemyProjectileInstance] 碰撞到节点: ${otherNode.name} (${otherPath})`);

        if (this.isWallNode(otherNode)) {
            // 撞到墙体
            this.hitWall();
        } else if (this.isPlayerBlock(otherNode)) {
            // 撞到玩家方块
            // TODO: 造成伤害（如果有需要）
            this.playHitSound();
            this.destroyProjectile();
        }
    }

    private getNodePath(node: Node): string {
        const names: string[] = [];
        let current: Node | null = node;
        while (current) {
            names.unshift(current.name);
            current = current.parent;
        }
        return names.join('/');
    }

    private isWallNode(node: Node): boolean {
        const name = node.name.toLowerCase();
        return name.includes('fence') || name.includes('wall');
    }

    private isPlayerBlock(node: Node): boolean {
        const path = this.getNodePath(node);
        return path.includes('WeaponBlock') || path.includes('Block');
    }

    private hitWall() {
        this.playHitSound();
        this.destroyProjectile();
        EventBus.getInstance().emit(GameEvents.ENEMY_DAMAGE_WALL, { damage: this.damage, source: this.node });
    }

    private playHitSound() {
        Audio.playEnemySound('data/弹球音效/MagicianAttack.mp3');
    }

    private destroyProjectile() {
        this.isDestroyed = true;
        if (this.node && this.node.isValid) {
            this.node.destroy();
        }
    }

    onDestroy() {
        // 清理逻辑，如有需要
    }
}