using Unity.Netcode;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Northbound
{
    /// <summary>
    /// 플레이어가 월드의 오브젝트와 상호작용하는 시스템
    /// </summary>
    public class PlayerInteraction : NetworkBehaviour
    {
        [Header("Interaction Settings")]
        public float interactionRange = 3f;
        public LayerMask interactableLayer = ~0;
        
        [Header("Detection")]
        public Transform rayOrigin;
        public bool useForwardDirection = true;
        
        [Header("Animation")]
        public bool playAnimations = true;
        public bool useAnimationEvents = true;
        public bool blockDuringAnimation = true;
        
        [Header("Equipment")]
        public bool useEquipment = true;
        
        [Header("Debug")]
        public bool showDebugRay = true;
        
        private PlayerInputActions _inputActions;
        private IInteractable _currentInteractable;
        private Camera _mainCamera;
        private Animator _animator;
        private EquipmentSocket _equipmentSocket;
        private bool _isInteracting;
        private float _interactionStartTime;
        private const float INTERACTION_TIMEOUT = 3f;

        public bool IsInteracting => _isInteracting;
        
        private void Awake()
        {
            _animator = GetComponent<Animator>();
            _equipmentSocket = GetComponent<EquipmentSocket>();
        }
        
        public override void OnNetworkSpawn()
        {
            base.OnNetworkSpawn();
            
            if (rayOrigin == null)
                rayOrigin = transform;
            
            _inputActions = new PlayerInputActions();
            _inputActions.Player.Interact.performed += OnInteract;
            _inputActions.Enable();
        }
        
        public override void OnNetworkDespawn()
        {
            if (_inputActions != null)
            {
                _inputActions.Player.Interact.performed -= OnInteract;
                _inputActions.Disable();
                _inputActions.Dispose();
            }
            
            base.OnNetworkDespawn();
        }
        
        private void Update()
        {
            if (!IsOwner) return;

            if (_isInteracting && Time.time - _interactionStartTime > INTERACTION_TIMEOUT)
            {
                _isInteracting = false;
            }

            DetectInteractable();
        }
        
        private void DetectInteractable()
        {
            Vector3 origin = rayOrigin.position;
            Vector3 direction = useForwardDirection ? transform.forward : _mainCamera.transform.forward;
            
            Ray ray = new Ray(origin, direction);
            
            if (showDebugRay)
            {
                Debug.DrawRay(ray.origin, ray.direction * interactionRange, 
                    _currentInteractable != null ? Color.green : Color.yellow);
            }
            
            if (Physics.Raycast(ray, out RaycastHit hit, interactionRange, interactableLayer))
            {
                IInteractable interactable = hit.collider.GetComponent<IInteractable>();
                
                if (interactable == null)
                {
                    interactable = hit.collider.GetComponentInParent<IInteractable>();
                }
                
                if (interactable != null && interactable.CanInteract(OwnerClientId))
                {
                    _currentInteractable = interactable;
                    return;
                }
            }
            
            _currentInteractable = null;
        }
        
        private void OnInteract(InputAction.CallbackContext context)
        {
            if (blockDuringAnimation && IsInteracting)
                return;
            
            if (_currentInteractable == null)
                return;

            var equipmentData = _currentInteractable.GetEquipmentData();
            string animTrigger = _currentInteractable.GetInteractionAnimation();
            bool hasAnimation = !string.IsNullOrEmpty(animTrigger);
            
            if (playAnimations && _animator != null && hasAnimation)
            {
                _isInteracting = true;
                _interactionStartTime = Time.time;
                
                if (useAnimationEvents)
                {
                    _animator.SetTrigger(animTrigger);
                }
                else
                {
                    _animator.SetTrigger(animTrigger);
                    _currentInteractable.Interact(OwnerClientId);
                    _isInteracting = false;
                }
            }
            else
            {
                _currentInteractable.Interact(OwnerClientId);
            }
        }
        
        public void AttachEquipment()
        {
            if (!IsOwner) return;
            if (_currentInteractable == null || !useEquipment) return;

            var equipmentData = _currentInteractable.GetEquipmentData();
            if (equipmentData == null || !equipmentData.attachOnStart) return;

            if (_equipmentSocket == null)
            {
                Debug.LogWarning("[PlayerInteraction] EquipmentSocket component not found on player");
                return;
            }

            if (equipmentData.equipmentPrefab == null)
            {
                Debug.LogWarning("[PlayerInteraction] Equipment prefab is null. Assign a prefab in the Resource's EquipmentData in Inspector");
                return;
            }

            _equipmentSocket.AttachToSocket(equipmentData.socketName, equipmentData.equipmentPrefab);
        }
        
        public void DetachEquipment()
        {
            if (!IsOwner) return;
            if (_currentInteractable == null || !useEquipment) return;

            var equipmentData = _currentInteractable.GetEquipmentData();
            if (equipmentData == null || !equipmentData.detachOnEnd) return;

            if (_equipmentSocket == null) return;

            _equipmentSocket.DetachFromSocket(equipmentData.socketName);
        }
        
        public void OnInteractionComplete()
        {
            _isInteracting = false;

            if (_currentInteractable != null)
            {
                _currentInteractable.Interact(OwnerClientId);
            }
        }
    }
}