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 string nextSceneCode1 = "";
    private string nextSceneCode2 = "";
    private string nextSceneName1 = "";
    private string nextSceneName2 = "";

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

    public void PrepareNextSceneChoices()
    {
        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);
        }

        Shuffle(candidates);

        nextSceneCode1 = "";
        nextSceneCode2 = "";
        nextSceneName1 = "";
        nextSceneName2 = "";

        if (candidates.Count >= 1)
        {
            nextSceneCode1 = candidates[0];
            nextSceneName1 = GetDisplayName(nextSceneCode1);
        }

        if (candidates.Count >= 2)
        {
            nextSceneCode2 = candidates[1];
            nextSceneName2 = GetDisplayName(nextSceneCode2);
        }
        else if (candidates.Count == 1 && !finalSceneUsed && !string.IsNullOrWhiteSpace(finalSceneName))
        {
            nextSceneCode2 = finalSceneName.Trim();
            nextSceneName2 = GetDisplayName(nextSceneCode2);
        }

        if (candidates.Count == 0)
        {
            if (!finalSceneUsed && !string.IsNullOrWhiteSpace(finalSceneName))
            {
                nextSceneCode1 = finalSceneName.Trim();
                nextSceneName1 = GetDisplayName(nextSceneCode1);
            }
            else
            {
                Debug.LogWarning("À̵¿ °¡´ÉÇÑ ´ÙÀ½ ¾ÀÀÌ ¾ø½À´Ï´Ù.");
            }
        }

        Debug.Log("¼±ÅÃÁö 1: " + nextSceneName1 + " / " + nextSceneCode1);
        Debug.Log("¼±ÅÃÁö 2: " + nextSceneName2 + " / " + nextSceneCode2);
    }

    public string GetNextSceneName1()
    {
        return nextSceneName1;
    }

    public string GetNextSceneCode1()
    {
        return nextSceneCode1;
    }

    public string GetNextSceneName2()
    {
        return nextSceneName2;
    }

    public string GetNextSceneCode2()
    {
        return nextSceneCode2;
    }

    public string GetNextSceneName()
    {
        PrepareNextSceneChoices();

        if (!string.IsNullOrEmpty(nextSceneCode1))
        {
            return nextSceneCode1;
        }

        return string.Empty;
    }

    public void MarkSceneVisited(string sceneName)
    {
        if (string.IsNullOrWhiteSpace(sceneName))
        {
            return;
        }

        string cleanSceneName = sceneName.Trim();

        if (cleanSceneName == finalSceneName)
        {
            finalSceneUsed = true;
        }

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

        Debug.Log("¹æ¹® ó¸®µÈ ¾À: " + cleanSceneName);
    }

    private void Shuffle(List<string> list)
    {
        for (int i = 0; i < list.Count; i++)
        {
            int randomIndex = Random.Range(i, list.Count);
            string temp = list[i];
            list[i] = list[randomIndex];
            list[randomIndex] = temp;
        }
    }

    private string GetDisplayName(string sceneName)
    {
        switch (sceneName)
        {
            case "blackjack":
                return "ºí·¢Àè";

            case "CatsRoom":
                return "Ĺ·ë";

            case "MazeRoom":
                return "¹Ì·Î¹æ";

            case "Cave_Test_2":
                return "µ¿±¼¹æ";

            default:
                return sceneName;
        }
    }

    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;

        nextSceneCode1 = "";
        nextSceneCode2 = "";
        nextSceneName1 = "";
        nextSceneName2 = "";

        Debug.Log("·£´ý ¹æ ¹æ¹® ±â·Ï ÃʱâÈ­");
    }
}