using UnityEngine;
using TMPro;
using UnityEngine.SceneManagement;

public class GameManager : MonoBehaviour
{
    public static GameManager Instance;

    [Header("Game Settings")]
    public int totalOrbsToWin = 20;
    public float timeRemaining = 300f;

    [Header("UI References")]
    public TextMeshProUGUI orbText;
    public TextMeshProUGUI timerText;

    [Header("Game Over UI")]
    public GameObject gameOverPanel;
    public TextMeshProUGUI gameOverTitleText;

    private int currentOrbs = 0;
    private bool isGameOver = false;

    public int GetOrbsInternal() { return currentOrbs; }

    public void SetDataInternal(int orbs, float time)
    {
        currentOrbs = orbs;
        timeRemaining = time;
        UpdateOrbUI();
        UpdateTimerUI();
    }

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

    void Start()
    {
        // Check if the static flag from MainMenu is set to true
        if (MainMenu.shouldLoadSave)
        {
            Debug.Log("GameManager: Continue detected. Finding SaveSystem to load data...");
            SaveSystem saveSys = FindFirstObjectByType<SaveSystem>();
            if (saveSys != null)
            {
                saveSys.LoadGame();
            }
            // Reset the flag so future restarts are "fresh" unless clicked from Menu again
            MainMenu.shouldLoadSave = false;
        }
        else
        {
            Debug.Log("GameManager: Starting Fresh Game.");
            UpdateOrbUI();
            UpdateTimerUI();
        }
    }

    void Update()
    {
        if (isGameOver) return;

        if (timeRemaining > 0)
        {
            timeRemaining -= Time.deltaTime;
            UpdateTimerUI();
        }
        else
        {
            GameOver(false);
        }
    }

    public void AddOrb()
    {
        currentOrbs++;
        UpdateOrbUI();

        if (currentOrbs >= totalOrbsToWin)
        {
            GameOver(true);
        }
    }

    // Cleaned up to use the SaveSystem instead of PlayerPrefs
    public void SaveProgress()
    {
        SaveSystem saveSys = FindFirstObjectByType<SaveSystem>();
        if (saveSys != null) saveSys.SaveGame();
    }

    public void LoadProgress()
    {
        SaveSystem saveSys = FindFirstObjectByType<SaveSystem>();
        if (saveSys != null) saveSys.LoadGame();
    }

    public void ClearSave()
    {
        string path = Application.persistentDataPath + "/savegame.json";
        if (System.IO.File.Exists(path)) System.IO.File.Delete(path);
        SceneManager.LoadScene(SceneManager.GetActiveScene().name);
    }

    void UpdateOrbUI()
    {
        if (orbText != null)
            orbText.text = "Orbs: " + currentOrbs + " / " + totalOrbsToWin;
    }

    void UpdateTimerUI()
    {
        if (timerText != null)
        {
            float minutes = Mathf.FloorToInt(timeRemaining / 60);
            float seconds = Mathf.FloorToInt(timeRemaining % 60);
            timerText.text = string.Format("Time: {0:00}:{1:00}", minutes, seconds);
        }
    }

    public void GameOver(bool won)
    {
        isGameOver = true;
        Time.timeScale = 0f;
        gameOverPanel.SetActive(true);

        if (won)
        {
            gameOverTitleText.text = "VICTORY!";
            gameOverTitleText.color = Color.green;
        }
        else
        {
            gameOverTitleText.text = "NIGHT HAS FALLEN...";
            gameOverTitleText.color = Color.red;
        }

        Cursor.lockState = CursorLockMode.None;
        Cursor.visible = true;
    }

    public void RestartGame()
    {
        Time.timeScale = 1f;
        SceneManager.LoadScene(SceneManager.GetActiveScene().name);
    }

    public void LoadMainMenu()
    {
        Time.timeScale = 1f;
        SceneManager.LoadScene("MainMenu");
    }
}