using UnityEngine;
using UnityEngine.Playables;
using UnityEngine.UI;

public class SettingsScreen : MonoBehaviour
{
    /// <summary>
    /// Reference to the scene playable director
    /// </summary>
    public PlayableDirector directorEnterFromMainMenu;

    /// <summary>
    /// Reference to the 'hardware acceleration' toggle option
    /// </summary>
    public Toggle useGPUOption;

    /// <summary>
    /// Start is called before the first frame update
    /// </summary>
    void Start()
    {
        useGPUOption.onValueChanged.AddListener(ToggleGPU);
        UpdateSettings();
        directorEnterFromMainMenu.Play();
    }

    /// <summary>
    /// Update the display of the user preferences
    /// </summary>
    private void UpdateSettings()
    {
        var pdc = PersistentDataController.GetInstance();
        useGPUOption.isOn = pdc.IsUsingGPU();
    }

    /// <summary>
    /// Toggle 'hardware acceleration' option
    /// </summary>
    private void ToggleGPU(bool state)
    {
        PersistentDataController.GetInstance().SetGPUUsage(state);
    }

    /// <summary>
    /// Restore the user preferences to their default values
    /// </summary>
    public void RestoreSettings()
    {
        PersistentDataController.GetInstance().RestoreSettings();
        UpdateSettings();
    }
}