using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class RandomSceneRouteManager : MonoBehaviour
{
    public static RandomSceneRouteManager Instance;

    [Header("·£´ýÀ¸·Î À̵¿ÇÒ ¹æ Scene À̸§µé")]
    [SerializeField] private string[] roomSceneNames;

    [Header("¸ðµç ¹æ ¹æ¹® ÈÄ À̵¿ÇÒ ¸¶Áö¸· Scene À̸§")]
    [SerializeField] private string finalSceneName;

    private readonly HashSet<string> visitedScenes = new HashSet<string>();
    private bool finalSceneUsed = false;

    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject);
        }
        else
        {
            Destroy(gameObject);
        }
    }

    public string GetNextSceneName()
    {
        string currentSceneName = SceneManager.GetActiveScene().name;

        Debug.Log("ÇöÀç ¾À À̸§: " + currentSceneName);

        if (IsRoomScene(currentSceneName))
        {
            visitedScenes.Add(currentSceneName);
        }

        List<string> candidates = new List<string>();

        foreach (string sceneName in roomSceneNames)
        {
            if (string.IsNullOrWhiteSpace(sceneName))
            {
                continue;
            }

            string cleanSceneName = sceneName.Trim();

            if (cleanSceneName == currentSceneName)
            {
                continue;
            }

            if (visitedScenes.Contains(cleanSceneName))
            {
                continue;
            }

            candidates.Add(cleanSceneName);
        }

        if (candidates.Count > 0)
        {
            int randomIndex = Random.Range(0, candidates.Count);
            string selectedSceneName = candidates[randomIndex];

            visitedScenes.Add(selectedSceneName);

            Debug.Log("·£´ýÀ¸·Î ¼±ÅÃµÈ ´ÙÀ½ ¾À: " + selectedSceneName);
            return selectedSceneName;
        }

        if (!finalSceneUsed && !string.IsNullOrWhiteSpace(finalSceneName))
        {
            finalSceneUsed = true;

            string cleanFinalSceneName = finalSceneName.Trim();
            Debug.Log("¸ðµç ¹æ ¹æ¹® ¿Ï·á. ¸¶Áö¸· ¾ÀÀ¸·Î À̵¿: " + cleanFinalSceneName);
            return cleanFinalSceneName;
        }

        Debug.LogWarning("À̵¿ °¡´ÉÇÑ ´ÙÀ½ ¾ÀÀÌ ¾ø½À´Ï´Ù.");
        return string.Empty;
    }

    private bool IsRoomScene(string sceneName)
    {
        foreach (string roomSceneName in roomSceneNames)
        {
            if (string.IsNullOrWhiteSpace(roomSceneName))
            {
                continue;
            }

            if (roomSceneName.Trim() == sceneName)
            {
                return true;
            }
        }

        return false;
    }

    public void RequestRandomSceneChange()
    {
        if (SceneLoadManager.Instance == null)
        {
            Debug.LogError("SceneLoadManager°¡ ¾ø½À´Ï´Ù.");
            return;
        }

        string nextSceneName = GetNextSceneName();

        if (string.IsNullOrEmpty(nextSceneName))
        {
            Debug.LogWarning("À̵¿ÇÒ ´ÙÀ½ ¾À À̸§ÀÌ ºñ¾îÀÖ½À´Ï´Ù.");
            return;
        }

        Debug.Log("·£´ý ¾À À̵¿ ¿äû: " + nextSceneName);
        SceneLoadManager.Instance.RequestSceneChange(nextSceneName);
    }

    public void ResetRoute()
    {
        visitedScenes.Clear();
        finalSceneUsed = false;
        Debug.Log("·£´ý ¹æ ¹æ¹® ±â·Ï ÃʱâÈ­");
    }
}