using UnityEngine;
using UnityEngine.SceneManagement;

public class GameManager : MonoBehaviour
{
    public goalScript blue, green, red, orange;
    private bool isGameOver = false;
    private GUIStyle gameOverStyle;
    private GUIStyle buttonStyle;
    private float elapsedTime = 0f;

    void Start()
    {
        blue.OnSolve += CheckGameOver;
        green.OnSolve += CheckGameOver;
        red.OnSolve += CheckGameOver;
        orange.OnSolve += CheckGameOver;
    }

    void Update()
    {
        if (!isGameOver)
        {
            elapsedTime += Time.deltaTime;
        }
    }

    GUIStyle GetGameOverStyle()
    {
        if (gameOverStyle == null)
        {
            gameOverStyle = new GUIStyle(GUI.skin.box)
            {
                fontSize = 24,
                alignment = TextAnchor.MiddleCenter
            };
        }
        return gameOverStyle;
    }

    GUIStyle GetButtonStyle()
    {
        if (buttonStyle == null)
        {
            buttonStyle = new GUIStyle(GUI.skin.button)
            {
                fontSize = 20,
                normal = { textColor = Color.white, background = MakeTex(2, 2, new Color(0.5f, 0.5f, 0.5f, 1.0f)) },
                hover = { background = MakeTex(2, 2, new Color(0.7f, 0.7f, 0.7f, 1.0f)) },
                active = { background = MakeTex(2, 2, new Color(0.3f, 0.3f, 0.3f, 1.0f)) }
            };
        }
        return buttonStyle;
    }

    void CheckGameOver()
    {
        isGameOver = blue.isSolved && green.isSolved && red.isSolved && orange.isSolved;
    }

    void OnGUI()
    {
        if (isGameOver)
        {
            Rect rect = new Rect(Screen.width / 2 - 100, Screen.height / 2 - 50, 200, 100);
            GUI.Box(rect, "Game Over", GetGameOverStyle());
            Rect rect2 = new Rect(Screen.width / 2 - 50, Screen.height / 2 + 55, 100, 50);
            if (GUI.Button(rect2, "Restart", GetButtonStyle()))
            {
                SceneManager.LoadScene(SceneManager.GetActiveScene().name);
            }

            Rect rect3 = new Rect(Screen.width / 2 - 100, Screen.height / 2 + 110, 200, 50);
            GUI.Box(rect3, "Time: " + elapsedTime.ToString("F2") + " seconds", GetGameOverStyle());
        }
        else
        {
            Rect rect4 = new Rect(10, 10, 300, 50);
            GUI.Box(rect4, "Time: " + elapsedTime.ToString("F2") + " seconds", GetGameOverStyle());
        }
    }

    void OnDestroy()
    {
        blue.OnSolve -= CheckGameOver;
        green.OnSolve -= CheckGameOver;
        red.OnSolve -= CheckGameOver;
        orange.OnSolve -= CheckGameOver;
    }

    Texture2D MakeTex(int width, int height, Color col)
    {
        Color[] pix = new Color[width * height];
        for (int i = 0; i < pix.Length; ++i)
        {
            pix[i] = col;
        }
        Texture2D result = new Texture2D(width, height);
        result.SetPixels(pix);
        result.Apply();
        return result;
    }
}