using UnityEngine;

namespace BaseGames.Player.States
{
    /// <summary>
    /// 蹬墙跳状态（架构 05_PlayerModule §2）。
    /// 从 WallSlideState 进入；施加背墙方向的水平 + 垂直速度；
    /// 短暂锁定水平输入后转为 FallState。
    /// </summary>
    public class WallJumpState : PlayerStateBase
    {
        private float _inputLockTimer;
        private int   _wallDir;

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

        public override void OnStateEnter()
        {
            // 记录墙壁方向（跳跃反向）
            _wallDir = Owner.WallDetector != null ? Owner.WallDetector.WallDirection : 0;
            if (_wallDir == 0) _wallDir = -Owner.FacingDirection;

            // 施加蹬墙跳速度
            Move?.WallJump(_wallDir);

            // 锁定水平输入
            _inputLockTimer = Cfg.WallJumpInputLockDuration;

            // 播放跳跃动画（复用跳跃动画）
            if (AnimCfg?.Jump != null) Anim?.Play(AnimCfg.Jump);

            Input.JumpCancelledEvent += OnJumpCancelled;
        }

        public override void OnStateExit()
        {
            Input.JumpCancelledEvent -= OnJumpCancelled;
        }

        public override void OnStateUpdate()
        {
            // 上升结束 → 下落
            if (!Move.IsRising)
            {
                Owner.TransitionTo(Owner.GetState<FallState>());
                return;
            }
        }

        public override void OnStateFixedUpdate()
        {
            _inputLockTimer -= Time.fixedDeltaTime;

            // 输入锁结束后允许水平控制
            if (_inputLockTimer <= 0f && Mathf.Abs(Input.MoveInput.x) > 0.01f)
                Move?.Move(Input.MoveInput.x * Cfg.RunSpeed);
        }

        private void OnJumpCancelled() => Move?.CutJump();
    }
}