export class CombatEvent {
    static readonly type = 'CombatEvent';
    constructor(
        public readonly attacker: ecs.Entity,
        public readonly target: ecs.Entity,
        public readonly damage: number
    ) {}
}

// 事件监听示例
oops.message.on(CombatEvent.type, (event: CombatEvent) => {
    const targetModel = event.target.get(HeroModel);
    targetModel.hp = Math.max(targetModel.hp - event.damage, 0);
    
    if (targetModel.hp <= 0) {
        event.target.add(Status).setDead();
    }
});