using TMPro;
using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(Button))]
public class RoomButtonUI : MonoBehaviour
{
    [Header("Data")]
    [SerializeField] private RoomData roomData;

    [Header("References")]
    [SerializeField] private Button button;
    [SerializeField] private Image backgroundImage;
    [SerializeField] private Image roomIconImage;
    [SerializeField] private TMP_Text roomNameText;
    [SerializeField] private GameObject lockIcon;
    [SerializeField] private GameObject clearIcon;

    [Header("Sprites")]
    [SerializeField] private Sprite normalSprite;
    [SerializeField] private Sprite selectedSprite;
    [SerializeField] private Sprite lockedSprite;
    [SerializeField] private Sprite clearedSprite;

    [Header("Colors When Sprite Is Missing")]
    [SerializeField] private Color normalColor = new Color(0.05f, 0.55f, 0.65f, 0.85f);
    [SerializeField] private Color selectedColor = new Color(0.75f, 1f, 1f, 0.95f);
    [SerializeField] private Color lockedColor = new Color(0.15f, 0.18f, 0.22f, 0.75f);
    [SerializeField] private Color clearedColor = new Color(0.2f, 0.8f, 0.65f, 0.9f);

    private RoomSelectManager manager;
    private RoomState currentState = RoomState.Unlocked;
    private bool isSelected;

    public RoomData RoomData => roomData;
    public RoomState CurrentState => currentState;

    private void Reset()
    {
        button = GetComponent<Button>();
        backgroundImage = GetComponent<Image>();
    }

    private void Awake()
    {
        if (button == null)
        {
            button = GetComponent<Button>();
        }

        if (backgroundImage == null)
        {
            backgroundImage = GetComponent<Image>();
        }

        if (button != null)
        {
            button.onClick.AddListener(HandleClick);
        }
    }

    private void OnDestroy()
    {
        if (button != null)
        {
            button.onClick.RemoveListener(HandleClick);
        }
    }

    public void Setup(RoomData newRoomData, RoomSelectManager newManager)
    {
        roomData = newRoomData;
        manager = newManager;
        Refresh(currentState, isSelected);
    }

    public void SetManager(RoomSelectManager newManager)
    {
        manager = newManager;
    }

    public void Refresh(RoomState state, bool selected)
    {
        currentState = state;
        isSelected = selected;

        if (roomNameText != null)
        {
            roomNameText.text = roomData != null ? roomData.RoomName : "방 없음";
            roomNameText.color = selected ? Color.black : Color.white;
        }

        if (roomIconImage != null)
        {
            bool hasIcon = roomData != null && roomData.RoomIcon != null;
            roomIconImage.gameObject.SetActive(hasIcon);
            if (hasIcon)
            {
                roomIconImage.sprite = roomData.RoomIcon;
            }
        }

        if (lockIcon != null)
        {
            lockIcon.SetActive(state == RoomState.Locked);
        }

        if (clearIcon != null)
        {
            clearIcon.SetActive(state == RoomState.Cleared || state == RoomState.MemoryGot);
        }

        if (button != null)
        {
            // 잠긴 방도 클릭 가능하게 둔다. 클릭하면 오른쪽 설명창에서 잠긴 이유를 보여줄 수 있다.
            button.interactable = true;
        }

        ApplyVisualState();
    }

    public void SetSelected(bool selected)
    {
        Refresh(currentState, selected);
    }

    private void HandleClick()
    {
        if (manager != null)
        {
            manager.SelectRoom(this);
        }
        else
        {
            Debug.LogWarning($"[{nameof(RoomButtonUI)}] Manager가 연결되지 않았습니다: {gameObject.name}");
        }
    }

    private void ApplyVisualState()
    {
        if (backgroundImage == null)
        {
            return;
        }

        Sprite targetSprite = null;
        Color targetColor = normalColor;

        if (isSelected)
        {
            targetSprite = selectedSprite;
            targetColor = selectedColor;
        }
        else
        {
            switch (currentState)
            {
                case RoomState.Locked:
                    targetSprite = lockedSprite;
                    targetColor = lockedColor;
                    break;
                case RoomState.Cleared:
                case RoomState.MemoryGot:
                    targetSprite = clearedSprite;
                    targetColor = clearedColor;
                    break;
                default:
                    targetSprite = normalSprite;
                    targetColor = normalColor;
                    break;
            }
        }

        backgroundImage.sprite = targetSprite;
        backgroundImage.color = targetSprite != null ? Color.white : targetColor;
    }
}