using UnityEngine;
using UnityEngine.InputSystem;
using Unity.Netcode;
using Unity.Netcode.Components;
using Unity.Cinemachine;

[RequireComponent(typeof(NetworkObject))]
public class PlayerNetworkController : NetworkBehaviour
{
    // ... 기존 변수들 유지 ...
    [Header("Movement Settings")]
    public float moveSpeed = 5f;
    public float rotationSpeed = 10f;
    public float jumpHeight = 1.5f;
    public float gravity = -19.62f;

    [Header("Interaction Settings")]
    [SerializeField] private float interactRange = 3f;
    [SerializeField] private LayerMask interactableLayer;
    [SerializeField] private LayerMask constructionLayer;
    [SerializeField] private float buildSpeedMultiplier = 2f;

    [Header("Mining Settings")]
    [SerializeField] private float attackRange = 1.5f;
    [SerializeField] private int miningDamage = 25;
    [SerializeField] private LayerMask mineableLayer;

    private CharacterController _controller;
    private PlayerInputActions _inputActions;
    private Animator _animator;
    private TunnelTraveler _traveler;

    private Vector2 _moveInput;
    private Vector3 _velocity;
    private Vector3 _currentMoveDir;
    private bool _isGrounded;
    private bool _isHoldingInteract = false;

    // NGO 초기화
    public override void OnNetworkSpawn()
    {
        if (!IsOwner) return;

        // 1. 씬에 있는 가상 카메라를 찾습니다.
        // Unity 6에서는 CinemachineVirtualCamera 대신 CinemachineCamera를 주로 사용합니다.
        var vcam = GameObject.FindAnyObjectByType<CinemachineCamera>();

        if (vcam != null)
        {
            // 2. 카메라의 Follow와 LookAt 대상을 '나'로 설정합니다.
            vcam.Follow = transform;
            vcam.LookAt = transform;
            Debug.Log("<color=green>[Camera] 로컬 플레이어에게 카메라가 연결되었습니다.</color>");
        }

        _inputActions = new PlayerInputActions();
        _inputActions.Player.Jump.performed += ctx => OnJump();
        _inputActions.Player.Attack.performed += ctx => OnAttackServerRpc();
        _inputActions.Player.Interact.performed += ctx => OnInteractTap(); // 탭 상호작용

        _inputActions.Player.Interact.started += ctx => _isHoldingInteract = true;
        _inputActions.Player.Interact.canceled += ctx => _isHoldingInteract = false;

        _inputActions.Enable();
    }

    void Awake()
    {
        _controller = GetComponent<CharacterController>();
        _animator = GetComponent<Animator>();
        _traveler = GetComponent<TunnelTraveler>();
    }

    void Update()
    {
        if (!IsOwner) return;
        if (_traveler != null && _traveler.IsTraveling) return;

        HandleGravity();
        HandleMovement();

        if (_isHoldingInteract) PerformConstructionSupport();
    }

    // --- 이동 관련 로직 (기존 유지) ---
    private void HandleMovement()
    {
        _isGrounded = _controller.isGrounded;
        _animator.SetBool("isGrounded", _isGrounded);

        bool isAttacking = _animator.GetCurrentAnimatorStateInfo(0).IsTag("Attack");
        _moveInput = _inputActions.Player.Move.ReadValue<Vector2>();
        Vector3 move = new Vector3(_moveInput.x, 0, _moveInput.y).normalized;

        if (isAttacking) move = _isGrounded ? Vector3.zero : _currentMoveDir;
        else if (move.magnitude > 0.1f) _currentMoveDir = move;

        if (move.magnitude >= 0.1f)
        {
            if (!isAttacking)
            {
                Quaternion targetRotation = Quaternion.LookRotation(move);
                transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, rotationSpeed * Time.deltaTime);
            }
            _controller.Move(move * moveSpeed * Time.deltaTime);
        }
        _animator.SetFloat("MoveSpeed", isAttacking && _isGrounded ? 0 : move.magnitude);
    }

    private void HandleGravity()
    {
        if (_isGrounded && _velocity.y < 0) _velocity.y = -2f;
        _velocity.y += gravity * Time.deltaTime;
        _controller.Move(_velocity * Time.deltaTime);
    }

    private void OnJump()
    {
        if (_isGrounded) _velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
    }

    // --- 채광 로직 (기존 유지) ---
    [Rpc(SendTo.Server, InvokePermission = RpcInvokePermission.Owner)]
    private void OnAttackServerRpc()
    {
        OnAttackClientRpc();
        Collider[] hitBlocks = Physics.OverlapSphere(transform.position + transform.forward, attackRange, mineableLayer);
        foreach (var col in hitBlocks)
        {
            MineableBlock block = col.GetComponentInParent<MineableBlock>();
            if (block != null) block.TakeDamageRpc(miningDamage);
        }
    }

    [ClientRpc]
    private void OnAttackClientRpc() => _animator.SetTrigger("Attack");

    private void OnInteractTap()
    {
        if (!IsOwner) return;
        _animator.SetTrigger("Interact");

        // 1. 캐릭터 주변 반경 내의 모든 콜라이더 감지
        Collider[] colliders = Physics.OverlapSphere(transform.position, interactRange, interactableLayer);

        IInteractable closestTarget = null;
        float minDistance = float.MaxValue;

        foreach (var col in colliders)
        {
            // 2. 방향 조건 없이 거리만 체크하여 가장 가까운 것 선택
            float dist = Vector3.Distance(transform.position, col.transform.position);
            if (dist < minDistance)
            {
                IInteractable interactable = col.GetComponentInParent<IInteractable>();
                if (interactable != null)
                {
                    minDistance = dist;
                    closestTarget = interactable;
                }
            }
        }

        // 3. 가장 가까운 대상이 있다면 상호작용 실행
        if (closestTarget != null)
        {
            closestTarget.Interact(gameObject);
        }
    }

    // 건설 지원 로직 (범위 내 지속 작업이므로 OverlapSphere 유지 또는 Raycast로 변경 가능)
    private void PerformConstructionSupport()
    {
        Collider[] targets = Physics.OverlapSphere(transform.position, interactRange, constructionLayer);
        foreach (var col in targets)
        {
            ConstructionSite site = col.GetComponentInParent<ConstructionSite>();
            if (site != null)
            {
                site.AdvanceConstruction(Time.deltaTime * buildSpeedMultiplier);
            }
        }
    }

    public override void OnNetworkDespawn()
    {
        if (IsOwner && _inputActions != null) _inputActions.Disable();
    }
}