using UnityEngine;
using System.Collections;

namespace MedievalShopkeeper
{
    public class ShopDoor : Interactable
    {
        public static ShopDoor Instance { get; private set; }

        [Header("Door Settings")]
        [Tooltip("The child object containing the physical door mesh.")]
        public Transform doorModel;
        
        [Tooltip("Rotation when the shop is OPEN.")]
        public Vector3 openEulerAngles = new Vector3(0, 90, 0);
        
        [Tooltip("Rotation when the shop is CLOSED.")]
        public Vector3 closedEulerAngles = new Vector3(0, 0, 0);
        
        public float swingSpeed = 2f;

        public override string InteractionPrompt 
        {
            get 
            {
                if (GameManager.Instance != null && GameManager.Instance.IsShopOpen)
                {
                    return "Close Shop";
                }
                else if (GameManager.Instance != null && GameManager.Instance.IsNightTime)
                {
                    return "Open Shop (Risk Robbery!)";
                }
                return "Open Shop";
            }
        }

        private void Start()
        {
            if (Instance != null && Instance != this) Destroy(this);
            else Instance = this;

            if (GameManager.Instance != null)
            {
                GameManager.Instance.OnShopStateChanged += UpdateDoorPhysicalState;
                // Snap to current state immediately
                UpdateDoorPhysicalState(GameManager.Instance.IsShopOpen, true);
            }
        }
        
        private void OnDestroy()
        {
            if (GameManager.Instance != null)
            {
                GameManager.Instance.OnShopStateChanged -= UpdateDoorPhysicalState;
            }
        }

        public override void Interact(PlayerController player)
        {
            base.Interact(player);

            if (GameManager.Instance == null) return;

            if (GameManager.Instance.IsShopOpen)
            {
                GameManager.Instance.CloseShop();
            }
            else
            {
                GameManager.Instance.OpenShop();
            }
        }

        private void UpdateDoorPhysicalState(bool isOpen)
        {
            UpdateDoorPhysicalState(isOpen, false);
        }

        private void UpdateDoorPhysicalState(bool isOpen, bool instant)
        {
            StopAllCoroutines();
            
            Vector3 targetEuler = isOpen ? openEulerAngles : closedEulerAngles;

            if (instant)
            {
                if (doorModel != null) doorModel.localRotation = Quaternion.Euler(targetEuler);
            }
            else
            {
                StartCoroutine(SwingDoor(targetEuler));
            }
        }

        private IEnumerator SwingDoor(Vector3 targetEuler)
        {
            if (doorModel == null) yield break;

            Quaternion startRot = doorModel.localRotation;
            Quaternion endRot = Quaternion.Euler(targetEuler);
            float t = 0;

            while (t < 1f)
            {
                t += Time.deltaTime * swingSpeed;
                doorModel.localRotation = Quaternion.Slerp(startRot, endRot, t);
                yield return null;
            }
            doorModel.localRotation = endRot;
        }
    }
}