using UnityEngine;

public class RoomSelectManager : MonoBehaviour
{
    [Header("References")]
    [SerializeField] private RoomButtonUI[] roomButtons;
    [SerializeField] private RoomDetailUI detailUI;
    [SerializeField] private RoomEnterHandler roomEnterHandler;
    [SerializeField] private RoomProgressManager roomProgressManager;

    [Header("Options")]
    [SerializeField] private bool autoFindButtonsInChildren = true;
    [SerializeField] private bool selectFirstUnlockedOnEnable = true;
    [Min(0)]
    [SerializeField] private int fallbackCurrentMemoryPieces = 0;

    private RoomButtonUI selectedButton;
    private RoomData selectedRoomData;

    public RoomData SelectedRoomData => selectedRoomData;

    private void Reset()
    {
        detailUI = GetComponentInChildren<RoomDetailUI>(true);
    }

    private void Awake()
    {
        if (detailUI == null)
        {
            detailUI = GetComponentInChildren<RoomDetailUI>(true);
        }

        if (autoFindButtonsInChildren && (roomButtons == null || roomButtons.Length == 0))
        {
            roomButtons = GetComponentsInChildren<RoomButtonUI>(true);
        }
    }

    private void OnEnable()
    {
        RefreshAll();

        if (selectFirstUnlockedOnEnable)
        {
            SelectFirstUnlockedRoom();
        }
        else if (detailUI != null)
        {
            detailUI.ShowEmpty();
        }
    }

    public void RefreshAll()
    {
        if (roomButtons == null)
        {
            return;
        }

        foreach (RoomButtonUI button in roomButtons)
        {
            if (button == null)
            {
                continue;
            }

            button.SetManager(this);
            RoomState state = GetRoomState(button.RoomData);
            button.Refresh(state, button == selectedButton);
        }

        if (selectedButton != null)
        {
            ShowSelectedRoomDetail();
        }
    }

    public void SelectRoom(RoomButtonUI button)
    {
        if (button == null)
        {
            return;
        }

        selectedButton = button;
        selectedRoomData = button.RoomData;

        foreach (RoomButtonUI roomButton in roomButtons)
        {
            if (roomButton == null)
            {
                continue;
            }

            roomButton.Refresh(GetRoomState(roomButton.RoomData), roomButton == selectedButton);
        }

        ShowSelectedRoomDetail();
    }

    public void SelectRoomByIndex(int index)
    {
        if (roomButtons == null || index < 0 || index >= roomButtons.Length)
        {
            Debug.LogWarning($"[{nameof(RoomSelectManager)}] 잘못된 방 인덱스입니다: {index}");
            return;
        }

        SelectRoom(roomButtons[index]);
    }

    public void EnterSelectedRoom()
    {
        if (selectedRoomData == null)
        {
            Debug.LogWarning($"[{nameof(RoomSelectManager)}] 선택된 방이 없습니다.");
            return;
        }

        RoomState state = GetRoomState(selectedRoomData);
        if (state == RoomState.Locked)
        {
            Debug.Log($"[{nameof(RoomSelectManager)}] 잠긴 방입니다: {selectedRoomData.RoomName}");
            return;
        }

        if (roomEnterHandler != null)
        {
            roomEnterHandler.EnterRoom(selectedRoomData);
        }
        else
        {
            Debug.Log($"[{nameof(RoomSelectManager)}] 방 입장 테스트: {selectedRoomData.RoomName}");
        }
    }

    public void SetCurrentMemoryPieces(int current)
    {
        fallbackCurrentMemoryPieces = Mathf.Max(0, current);

        if (roomProgressManager != null)
        {
            roomProgressManager.SetMemoryPieceCount(current);
        }

        RefreshAll();
    }

    // MemoryProgressManager의 OnProgressChanged(int current, int max) 이벤트와 연결하기 위한 오버로드입니다.
    public void SetCurrentMemoryPieces(int current, int max)
    {
        SetCurrentMemoryPieces(current);
    }

    public RoomState GetRoomState(RoomData roomData)
    {
        if (roomData == null)
        {
            return RoomState.Locked;
        }

        if (roomProgressManager != null)
        {
            return roomProgressManager.GetRoomState(roomData);
        }

        int currentPieces = GetCurrentMemoryPieces();
        if (currentPieces < roomData.RequiredMemoryPieces)
        {
            return RoomState.Locked;
        }

        if (roomData.DefaultState == RoomState.Locked && currentPieces >= roomData.RequiredMemoryPieces)
        {
            return RoomState.Unlocked;
        }

        return roomData.DefaultState;
    }

    public int GetCurrentMemoryPieces()
    {
        return roomProgressManager != null ? roomProgressManager.CurrentMemoryPieces : fallbackCurrentMemoryPieces;
    }

    private void ShowSelectedRoomDetail()
    {
        if (detailUI == null)
        {
            return;
        }

        RoomState state = GetRoomState(selectedRoomData);
        detailUI.ShowRoom(selectedRoomData, state, GetCurrentMemoryPieces(), EnterSelectedRoom);
    }

    private void SelectFirstUnlockedRoom()
    {
        if (roomButtons == null || roomButtons.Length == 0)
        {
            if (detailUI != null)
            {
                detailUI.ShowEmpty();
            }
            return;
        }

        foreach (RoomButtonUI button in roomButtons)
        {
            if (button == null || button.RoomData == null)
            {
                continue;
            }

            if (GetRoomState(button.RoomData) != RoomState.Locked)
            {
                SelectRoom(button);
                return;
            }
        }

        SelectRoom(roomButtons[0]);
    }
}