using UnityEngine;
using BaseGames.Combat;

namespace BaseGames.Player.States
{
    /// <summary>
    /// 受击硬直状态（架构 05_PlayerModule §2）。
    /// 由 PlayerController.TakeDamage 在玩家非无敌时触发；
    /// 播放 Hurt 动画，施加击退，结束后回到 Idle 或 Fall。
    /// </summary>
    public class HurtState : PlayerStateBase
    {
        private float _timer;
        private bool  _ended;

        public HurtState(PlayerController owner) : base(owner) { }

        public void Initialize(BaseGames.Combat.DamageInfo info)
        {
            // 由 PlayerController.TakeDamage 传入伤害信息
            if (info.KnockbackForce > 0.01f)
                Move?.ApplyKnockback(info.KnockbackDirection, info.KnockbackForce);
        }

        public override void OnStateEnter()
        {
            // 持续时长从 PlayerAnimationConfigSO 读取，不同攻击可设置不同硬直
            _timer = Owner.AnimConfig?.HurtDuration ?? 0.4f;
            _ended = false;
            Stats?.BeginInvincibility();
            Feedback.PlayTakeHit();

            if (AnimCfg?.Hurt != null)
            {
                var state = Anim?.Play(AnimCfg.Hurt);
                if (state != null)
                    state.Events(this).OnEnd = OnHurtEnd;
            }
        }

        public override void OnStateUpdate()
        {
            _timer -= Time.deltaTime;
            if (_timer <= 0f)
                OnHurtEnd();
        }

        private void OnHurtEnd()
        {
            if (_ended) return;
            _ended = true;
            if (Stats != null && !Stats.IsAlive)
            {
                Owner.TransitionTo(Owner.GetState<DeadState>());
                return;
            }

            if (Move.IsGrounded)
                Owner.TransitionTo(Owner.GetState<IdleState>());
            else
                Owner.TransitionTo(Owner.GetState<FallState>());
        }
    }
}