using UnityEngine;
using UnityEngine.InputSystem;

namespace OnlyScove.Scripts
{
    public class PlayerDebugProvider : MonoBehaviour
    {
        [Header("References")]
        [SerializeField] private PlayerStateMachine stateMachine;
        [Tooltip("Kéo cái Canvas (World Space) bạn đã thiết kế vào đây")]
        [SerializeField] private GameObject debugCanvas;

        [Header("Follow Settings")]
        [SerializeField] private Vector3 followOffset = new Vector3(1.5f, 2f, 0f);
        [SerializeField] private float smoothTime = 0.15f;
        [SerializeField] private bool lookAtCamera = true;

        // Các thuộc tính Public để bạn truy cập từ Script UI của bạn
        public string CurrentState => stateMachine != null ? stateMachine.CurrentStateName : "N/A";
        public string GroundedStatus => (stateMachine != null && stateMachine.IsGrounded) ? "YES" : "NO";
        public float HorizontalSpeed => stateMachine != null ? new Vector3(stateMachine.Controller.velocity.x, 0, stateMachine.Controller.velocity.z).magnitude : 0f;
        public float VerticalSpeed => stateMachine != null ? stateMachine.VelocityY : 0f;
        
        // Sửa lỗi truy cập InputReader từ StateMachine
        public Vector2 MoveInput => (stateMachine != null && stateMachine.Input != null) ? stateMachine.Input.MoveInput : Vector2.zero;
        public bool IsSprinting => (stateMachine != null && stateMachine.Input != null) ? stateMachine.Input.IsSprintHeld : false;
        
        public string TargetInteractable => stateMachine != null ? (stateMachine.GetInteractable()?.InteractionPrompt ?? "None") : "N/A";

        public IInteractable GetActiveInteractable() => stateMachine?.GetInteractable();
        
        public Vector3 GetInteractionPoint() 
        {
            if (stateMachine == null || stateMachine.Scanner == null) return Vector3.zero;
            return stateMachine.Scanner.GetLastInteractionPoint(stateMachine.InteractionRange, stateMachine.InteractionMask);
        }

        private Vector3 currentVelocity;
        private Transform cameraTransform;
        private bool isVisible = true;

        private void Awake()
        {
            if (stateMachine == null) stateMachine = GetComponent<PlayerStateMachine>();
            cameraTransform = Camera.main?.transform;
            
            if (debugCanvas != null) debugCanvas.SetActive(isVisible);
        }

        private void Update()
        {
            // Toggle Visibility (Ctrl + Shift + B) sử dụng New Input System
            if (Keyboard.current != null)
            {
                bool ctrl = Keyboard.current.leftCtrlKey.isPressed || Keyboard.current.rightCtrlKey.isPressed;
                bool shift = Keyboard.current.leftShiftKey.isPressed || Keyboard.current.rightShiftKey.isPressed;
                bool bDown = Keyboard.current.bKey.wasPressedThisFrame;

                if (ctrl && shift && bDown)
                {
                    isVisible = !isVisible;
                    if (debugCanvas != null) debugCanvas.SetActive(isVisible);
                }
            }
        }

        private void LateUpdate()
        {
            if (!isVisible || debugCanvas == null) return;

            // 1. Damping Follow: UI đuổi theo Player
            Vector3 targetPos = transform.position + followOffset;
            debugCanvas.transform.position = Vector3.SmoothDamp(
                debugCanvas.transform.position, 
                targetPos, 
                ref currentVelocity, 
                smoothTime
            );

            // 2. Billboard: Luôn nhìn về Camera
            if (lookAtCamera && cameraTransform != null)
            {
                debugCanvas.transform.LookAt(debugCanvas.transform.position + cameraTransform.forward);
            }
        }
    }
}