@ecs.registerSystem()
export class SkillEffectSystem extends ecs.System {
    filter(): ecs.IMatcher {
        return ecs.allOf(SkillEffectComp, CollisionResultComp);
    }

    update(skills: ecs.Entity[]) {
        skills.forEach(skill => {
            const effect = skill.get(SkillEffectComp);
            const targets = skill.get(CollisionResultComp).targets;

            targets.forEach(hero => {
                // 应用即时伤害
                if (effect.effectType === 'instant') {
                    this.applyInstantDamage(hero, effect.damage);
                }
                // 应用持续效果
                else if (effect.effectType === 'dot') {
                    this.applyDOT(hero, effect);
                }
            });

            // 清除碰撞结果
            skill.remove(CollisionResultComp);
        });
    }

    private applyInstantDamage(hero: ecs.Entity, damage: number) {
        const model = hero.get(HeroModelComp);
        model.hp -= damage;
        
        // 触发受击事件
        oops.message.dispatch('HeroDamaged', {
            hero,
            damage,
            currentHp: model.hp
        });
    }

    private applyDOT(hero: ecs.Entity, effect: SkillEffectComp) {
        // 添加持续伤害组件
        hero.add(DOTComp, {
            damagePerSec: effect.damage,
            duration: effect.duration
        });
    }
}