using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Audio;

public class MainMenuManager : MonoBehaviour
{
    [Header("Panels")]
    public GameObject mainPanel;
    public GameObject optionsPanel;

    [Header("Credits")]
    public GameObject creditsPanel;

    public CreditsScroller creditsScroller;

    [Header("Audio")]
    public AudioSource musicSource;
    public Slider volumeSlider;
    public AudioSource mainMenuMusic;
    public AudioSource creditsMusic;

    [Header("Brightness")]
    public Slider brightnessSlider;
    public Light directionalLight;

    [Header("Canvas Brightness")]
    public Image brightnessOverlay;

    private void Start()
    {
        // ===== VOLUMEN =====
        float savedVolume = PlayerPrefs.GetFloat("Volume", 1f);

        volumeSlider.value = savedVolume;
        musicSource.volume = savedVolume;

        // ===== BRILLO =====
        float savedBrightness = PlayerPrefs.GetFloat("Brightness", 1f);

        brightnessSlider.value = savedBrightness;

        // Aplicar TODO el sistema de brillo
        ChangeBrightness();

        // ===== MENUS =====
        mainPanel.SetActive(true);
        optionsPanel.SetActive(false);
    }

    // ===== OPCIONES =====

    public void OpenOptions()
    {
        mainPanel.SetActive(false);
        optionsPanel.SetActive(true);
    }

    public void CloseOptions()
    {
        mainPanel.SetActive(true);
        optionsPanel.SetActive(false);
    }

    // ===== VOLUMEN =====

    public void ChangeVolume()
    {
        musicSource.volume = volumeSlider.value;

        PlayerPrefs.SetFloat("Volume", volumeSlider.value);
        PlayerPrefs.Save();
    }

    // ===== BRILLO =====

    public void ChangeBrightness()
    {
        float brightness = brightnessSlider.value;

        // Luz del mundo
        directionalLight.intensity = brightness;

        // Overlay UI
        float darkness = 1 - (brightness / 2f);

        darkness = Mathf.Clamp01(darkness);

        Color overlayColor = brightnessOverlay.color;
        overlayColor.a = darkness;

        brightnessOverlay.color = overlayColor;

        PlayerPrefs.SetFloat("Brightness", brightness);
        PlayerPrefs.Save();
    }

    // ===== CREDITOS =====
    public void OpenCredits()
    {
        mainPanel.SetActive(false);
        creditsPanel.SetActive(true);

        // CAMBIO DE MUSICA
        mainMenuMusic.Stop();

        creditsMusic.Play();
    }

    public void CloseCredits()
    {
        creditsPanel.SetActive(false);
        mainPanel.SetActive(true);

        creditsMusic.Stop();

        mainMenuMusic.Play();
    }

    // ===== SALIR =====

    public void ExitGame()
    {
        Debug.Log("Juego Cerrado");

#if UNITY_EDITOR
        UnityEditor.EditorApplication.isPlaying = false;
#else
        Application.Quit();
#endif
    }
}