@ecs.registerSystem()
export class CombatSystem extends ecs.System {
    filter(): ecs.IMatcher {
        return ecs.allOf(Combat, HeroModel);
    }

    update(entities: ecs.Entity[]) {
        entities.forEach(attacker => {
            if (attacker.has(HeroModel)) {
                this.processHeroAttack(attacker);
            }
        });
    }
    
    private processHeroAttack(attacker: ecs.Entity) {
        const combat = attacker.get(Combat);
        const model = attacker.get(HeroModel);
        
        if (combat.target && model.hp > 0) {
            // 攻击逻辑
            combat.attackTimer += this.dt;
            if (combat.attackTimer >= combat.attackInterval) {
                this.executeAttack(attacker, combat.target);
                combat.attackTimer = 0;
            }
        }
    }
    
    private executeAttack(attacker: ecs.Entity, target: ecs.Entity) {
        // 伤害计算逻辑
        const attack = attacker.get(HeroModel).attack;
        const defense = target.get(HeroModel).defense;
        const damage = Math.max(attack - defense, 1);
        
        oops.message.dispatch('CombatEvent', {
            attacker,
            target,
            damage
        });
    }
}