namespace BaseGames.Enemies.States
{
    /// <summary>
    /// 击飞腾空状态：施加击飞冲量，播放 KnockUp 动画直至落地/动画结束后恢复 Controlled。
    ///
    /// 触发条件：TakeDamage 检测到 DamageFlags.Launch + 伤害 &gt;= launchThreshold。
    /// 来袭方向由 <see cref="EnemyBase.PendingLaunchDir"/> 提供。
    /// 若 AnimConfig 无 KnockUp Clip，则通过 <see cref="EnemyBase.ScheduleStateRecovery"/> 按时长兜底恢复。
    /// </summary>
    public sealed class EnemyKnockUpState : IEnemyState
    {
        public EnemyStateType StateType => EnemyStateType.KnockUp;

        public void Enter(EnemyBase owner)
        {
            var cfg = owner.StatsSO?.HitTiers ?? default;

            // 施加击飞冲量
            owner.Movement?.LaunchKnockup(owner.PendingLaunchDir, cfg.launchHorzForce, cfg.launchUpForce);

            if (owner.Animancer != null && owner.AnimConfig?.KnockUp != null)
            {
                var animState = owner.Animancer.Play(owner.AnimConfig.KnockUp);
                animState.Events(owner).OnEnd = () =>
                {
                    if (owner.CurrentState == EnemyStateType.KnockUp)
                        owner.ForceState(EnemyStateType.Controlled);
                };
            }
            else
            {
                // 无 KnockUp 动画：按配置时长自动恢复
                float duration = cfg.knockUpDuration > 0f ? cfg.knockUpDuration : 0.5f;
                owner.ScheduleStateRecovery(EnemyStateType.KnockUp, duration);
            }
        }

        public void Exit(EnemyBase owner) { }
    }
}