using UnityEngine;
using UnityEngine.UI;
using TMPro;

public class GameManager : MonoBehaviour
{
    public static GameManager instance;

    [Header("Game Settings")]
    public int width = 5;
    public int height = 5;

    [Header("Prefabs and UI")]
    public GameObject[] tilePrefabs;
    public TMP_InputField seedInput;
    public TMP_Dropdown sizeDropdown;

    [Header("Buttons")]
    public Button newGameButton;
    public Button restartGameButton;
    public Button solveButton;

    private int currentSeed;
    private Tile[,] tiles;

    void Awake()
    {
        instance = this;

        newGameButton.onClick.AddListener(NewGame);
        restartGameButton.onClick.AddListener(RestartGame);
        solveButton.onClick.AddListener(SolveGame);
    }

    void Start()
    {
        NewGame();
    }

    public void NewGame()
    {
        UpdateMapSizeFromDropdown(); // Get map size from dropdown
        currentSeed = Random.Range(0, int.MaxValue);
        seedInput.text = currentSeed.ToString();
        GenerateMap();
    }

    public void RestartGame()
    {
        UpdateMapSizeFromDropdown(); // Ensure regeneration based on current difficulty
        int.TryParse(seedInput.text, out currentSeed);
        GenerateMap();
    }

    public void GenerateMap()
    {
        ClearExistingTiles();
        tiles = new Tile[width, height];
        MapGenerator.Generate(tiles, tilePrefabs, width, height, currentSeed);
        CheckConnections();
    }

    private void ClearExistingTiles()
    {
        if (tiles != null)
        {
            foreach (Tile tile in tiles)
            {
                if (tile != null)
                    Destroy(tile.gameObject);
            }
        }
        tiles = null;
    }

    public void CheckConnections()
    {
        bool solved = Solver.CheckSolved(tiles, width, height);
        if (solved)
            Debug.Log("Puzzle Solved!");
    }

    public void SolveGame()
    {
        RestoreSolution();
        CheckConnections();
    }

    public void RestoreSolution()
    {
        foreach (var tile in tiles)
        {
            tile.ApplyRotation(tile.SolutionRotation);
            tile.SetConnectionState(true); // Update texture when restoring
        }
        CheckConnections();
    }


    void Update()
    {
        if (Input.GetKeyDown(KeyCode.J))
            JumbleTiles();
    }

    public void JumbleTiles()
    {
        foreach (var tile in tiles)
        {
            if (!tile.locked)
                tile.RandomRotate();
        }
        CheckConnections();
    }

    private void UpdateMapSizeFromDropdown()
    {
        switch (sizeDropdown.value)
        {
            case 0: // Easy
                width = height = 5;
                break;
            case 1: // Medium
                width = height = 8;
                break;
            case 2: // Hard
                width = height = 11;
                break;
            default:
                width = height = 5;
                break;
        }
    }
}