using System.IO;
using UnityEngine;
using UnityEngine.Playables;

/// <summary>
/// StartScreen scene manager 
/// </summary>
public class MainMenuScreen : MonoBehaviour
{
    /// <summary>
    /// Reference to the enter animation scene playable director
    /// </summary>
    public PlayableDirector directorEnterFromBoot;

    /// <summary>
    /// Reference to the enter animation scene playable director
    /// </summary>
    public PlayableDirector directorEnterFromCourseMenu;

    /// <summary>
    /// Reference to the enter animation scene playable director
    /// </summary>
    public PlayableDirector directorEnterFromListMinigames;

    /// <summary>
    /// Reference to the enter animation scene playable director
    /// </summary>
    public PlayableDirector directorEnterFromSettings;

    /// <summary>
    /// Check on load whether a user is already present, 
    /// if not load the UserCreationScreen scene so the user can create a new account
    /// </summary>
    void Awake()
    {
        if (!File.Exists(PersistentDataController.PATH) || UserList.GetUsers().Count <= 0)
        {
            UserCreationScreen.canGoBack = false;
            SystemController.GetInstance().LoadNextScene("Accounts/Scenes/UserCreationScreen");
        }
    }

    /// <summary>
    /// Start is called before the first frame update
    /// </summary>
    void Start()
    {
        var sys = SystemController.GetInstance();
        if (sys.previousScene == SystemController.GetSceneIndex("Common/Scenes/Boot"))
            directorEnterFromBoot.Play();
        else if (sys.previousScene == SystemController.GetSceneIndex("Common/Scenes/CoursesMenuScreen"))
            directorEnterFromCourseMenu.Play();
        else if (sys.previousScene == SystemController.GetSceneIndex("Common/Scenes/ListMinigamesScreen"))
            directorEnterFromListMinigames.Play();
        else if (sys.previousScene == SystemController.GetSceneIndex("Common/Scenes/SettingsScreen"))
            directorEnterFromSettings.Play();
    }

    /// <summary>
    /// Quit the application
    /// </summary>
    public void QuitApplication()
    {
        Application.Quit();
    }

    /// <summary>
    /// Load the `CoursesMenuScreen` scene
    /// </summary>
    public void GotoCourses()
    {
        SystemController.GetInstance().LoadNextScene("Common/Scenes/CoursesMenuScreen");
    }

    /// <summary>
    /// Load the `ListMinigamesScreen` scene
    /// </summary>
    public void GotoMinigames()
    {
        SystemController.GetInstance().LoadNextScene("Common/Scenes/ListMinigamesScreen");
    }

    /// <summary>
    /// Load the `SettingsScreen` scene
    /// </summary>
    public void GotoSettings()
    {
        SystemController.GetInstance().LoadNextScene("Common/Scenes/SettingsScreen");
    }
}