using System;
using Core;
using Script.Gameplay.Input;
using UnityEngine;

namespace Script.Gameplay.Player
{
    public class PlayerMoveController : MonoBehaviour
    {
        [Header("Movement Settings")] [Tooltip("移动速度（米/秒）")]
        public float speed = 5f;

        [Tooltip("跳跃高度（米）")] public float jumpHeight = 2f;
        [Tooltip("重力加速度（米/秒²）")] public float gravity = -9.81f;

        [Header("Ground Check")] [Tooltip("检测地面的位置（通常为角色脚下）")]
        public Transform groundCheck;

        [Tooltip("地面检测半径")] public float groundDistance = 0.4f;
        [Tooltip("地面层（LayerMask）")] public LayerMask groundMask;

        [Header("Sound Effects")]
        [SerializeField] private AudioSource playerSound;
        [SerializeField] private AudioClip jumpSound;
        [SerializeField] private AudioClip walkSound;
        private float initSpeed;

        private CharacterController characterController;
        private Vector3 velocity;
        private bool isGrounded;
        private InputManager inputManager;

        private float lastGroundY;
        private bool wasGroundedLastFrame;

        [Tooltip("从高处落下时的伤害阈值（米）")] [SerializeField]
        private float fallDamageThreshold = 3f; //伤害阈值

        [Tooltip("推动物体的力量")] [SerializeField]
        private float pushPower = 2f;

        [Header("Footstep Settings")]
        [Tooltip("判定为走路的最小输入强度")] [SerializeField]
        private float walkThreshold = 0.1f;

        private void Awake()
        {
            characterController = GetComponent<CharacterController>();
            if (characterController == null)
                Debug.LogError("PlayerMoveController 需要 CharacterController 组件！");

            initSpeed = speed;
            playerSound = playerSound != null ? playerSound : GetComponent<AudioSource>();
            if (playerSound == null)
                Debug.LogWarning("PlayerMoveController: AudioSource 未设置，音效将不会播放。");
        }

        private void Start()
        {
            inputManager = InputManager.Instance;
        }

        private void Update()
        {
            // 地面检测
            bool isCurrentlyGrounded = groundCheck != null
                ? Physics.CheckSphere(groundCheck.position, groundDistance, groundMask)
                : characterController.isGrounded;

            // 记录离开地面时的高度
            if (wasGroundedLastFrame && !isCurrentlyGrounded)
            {
                lastGroundY = transform.position.y;
            }

            // 落地检测
            if (!wasGroundedLastFrame && isCurrentlyGrounded)
            {
                float fallHeight = lastGroundY - transform.position.y;
                if (fallHeight > fallDamageThreshold) // 3米为伤害阈值，可调整
                {
                    int damage = Mathf.RoundToInt((fallHeight - 3f) * 10); // 每超出1米伤害10点
                    var playerController = GetComponent<PlayerController>();
                    if (playerController != null)
                        playerController.TakeDamage(damage);
                }
            }

            wasGroundedLastFrame = isCurrentlyGrounded;

            // 地面检测
            if (groundCheck != null)
                isGrounded = Physics.CheckSphere(groundCheck.position, groundDistance, groundMask);
            else
                isGrounded = characterController.isGrounded;

            if (isGrounded && velocity.y < 0)
                velocity.y = -2f; // 保持贴地

            Vector2 inputMove = inputManager.Move;
            // 获取输入
            float x = inputMove.x;
            float z = inputMove.y;

            // 按玩家朝向移动
            Vector3 move = transform.right * x + transform.forward * z;
            characterController.Move(move * speed * Time.deltaTime);

            // 走路音效逻辑：在地面且移动输入较大时播放循环走路音效
            HandleFootstepAudio(x, z);

            // 跳跃
            if (isGrounded && inputManager.JumpPressed)
            {
                // 跳跃时停止走路循环声并播放跳跃音效（一次性）
                StopWalkAudioIfPlaying();
                if (playerSound != null && jumpSound != null)
                    playerSound.PlayOneShot(jumpSound);

                velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
            }

            // 重力
            velocity.y += gravity * Time.deltaTime;
            characterController.Move(velocity * Time.deltaTime);
        }

        private void HandleFootstepAudio(float x, float z)
        {
            if (playerSound == null || walkSound == null) return;

            float inputMag = new Vector2(x, z).magnitude;
            bool shouldPlayWalk = isGrounded && inputMag > walkThreshold;

            if (shouldPlayWalk)
            {
                if (playerSound.clip != walkSound || !playerSound.isPlaying)
                {
                    playerSound.clip = walkSound;
                    playerSound.loop = true;
                    playerSound.Play();
                }
            }
            else
            {
                // 如果当前正在播放走路音效则停止
                if (playerSound.clip == walkSound && playerSound.isPlaying)
                {
                    playerSound.Stop();
                    playerSound.loop = false;
                    playerSound.clip = null;
                }
            }
        }

        private void StopWalkAudioIfPlaying()
        {
            if (playerSound == null) return;
            if (playerSound.clip == walkSound && playerSound.isPlaying)
            {
                playerSound.Stop();
                playerSound.loop = false;
                playerSound.clip = null;
            }
        }

        private void OnControllerColliderHit(ControllerColliderHit hit)
        {
            Rigidbody body = hit.collider.attachedRigidbody;
            // 只推动带有刚体且非静态的物体
            if (body != null && !body.isKinematic)
            {
                // 忽略从下方碰撞
                if (hit.moveDirection.y < -0.3f) return;

                Vector3 pushDir = new Vector3(hit.moveDirection.x, 0, hit.moveDirection.z);
                body.AddForce(pushDir * pushPower, ForceMode.Impulse);
            }
        }

        public void SetSpeed(float newSpeed)
        {
            speed = newSpeed;
        }

        public void ResetSpeed()
        {
            speed = initSpeed;
        }
    }
}