gold_sprint_lpr/Assets/Scripts/GameScene/GameManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public enum States {
	Menu = 0,
	LoadingScene = 5,
	LoadingVideo = 10,
	RaceSetup = 15,
	Race = 20
}

public class GameManager : MonoBehaviour {
    private static GameManager _instance;

    //public static GameManager Instance {get {return _instance; } }
    public static GameManager Instance {get {return _instance ?? (_instance =
            new GameObject("GameManager").AddComponent<GameManager>()); } }

    private HUDManager hm;
    private BikeManager bm1;
    private BikeManager bm2;

	private States _status;
	public States Status {get {return _status;} }

    // Skins of the two players
    private int[] _skins = new int[2];

    private ConfigurationLoader conf;

    private void Awake(){
        // Singleton
        if (_instance != null && _instance != this) {
            Debug.Log("WARNING: Other instance of GameManager found.");
            Destroy(gameObject);
			return;
		}

		_instance = this;

        // Don't destroy when loading new scene
        DontDestroyOnLoad(transform.gameObject);

        conf = new ConfigurationLoader();

		_status = States.Menu;	

		// TODO: Load Menu
    }

    private void Start() {
        // Quick Check
        if (hm == null)
            Debug.Log("ERROR: HUDManager not registered.");
        if (bm1 == null)
            Debug.Log("ERROR: BikeManager P1 not registered.");
        if (bm2 == null)
            Debug.Log("ERROR: BikeManager P2 not registered.");
    }

    public void RegisterBike(BikeManager bike, int bikeID) {
        if (bikeID == 0)
            bm1 = bike;
        if (bikeID == 1)
            bm2 = bike;
    }

    public void RegisterHUD(HUDManager hud) {
        hm = hud;
    }

    public BikeManager GetBikeManager(int bikeID) {
        if (bikeID == 0)
            return bm1;
        if (bikeID == 1)
            return bm2;
        return null;
    }

    public void Hello() {
        Debug.Log("Hello!");
    }

    public float GetRaceDistance() {
        return conf.distance;
    }

    public float GetRaceNormalTime() {
        return conf.normalTime;
    }

    public float GetBikeWheelDiameter(int bikeID) {
        return conf.diameters[bikeID];
    }

    public int GetSensorsCount(int bikeID) {
        return conf.sensors[bikeID];
    }

	public float GetVideoEnd(int videoID) {
		return conf.videoEnds[videoID];
	}

    public void SetSkins(int player1, int player2) {
        _skins[0] = player1;
        _skins[1] = player2;
    }

    public int GetSkins(int playerID) {
        return _skins[playerID];
    }

	// TODO: Remove once menus are ok
    void Update() {
	    if (Input.GetButtonDown("SubmitP1")) {
            SetSkins(0, 1);
			LaunchRace();
        }

		if (_status == States.LoadingVideo) {
			Debug.Log(bm1.LoadingComplete() + " " + bm2.LoadingComplete());
			if (bm1.LoadingComplete() && bm2.LoadingComplete()) {
				Debug.Log("Videos are set up and ready to go!");
				_status = States.RaceSetup;
				StartCoroutine(SetupRace());
			}
		}
    }

	public void LaunchRace() {
		_status = States.LoadingScene;
		StartCoroutine(LoadGameScene());
	}

	void OnLevelFinishedLoading(Scene scene, LoadSceneMode mode) {
		if (_status == States.LoadingScene) {
			Debug.Log("Loading videos");
			_status = States.LoadingVideo;
		}
	}

	void OnEnable() {
		SceneManager.sceneLoaded += OnLevelFinishedLoading;
	}

	void OnDisable() {
		SceneManager.sceneLoaded -= OnLevelFinishedLoading;
	}

	IEnumerator SetupRace() {
		hm.SetMessageActive(false);
		// Timer
		//yield return new WaitForSeconds(3f);
		hm.SetMessageActive(true);
		hm.SetMessage("Prêts ?");
		// Timer
		yield return new WaitForSeconds(2f);
		hm.SetMessage("Pédalez !");
		_status = States.Race;
		// Timer
		yield return new WaitForSeconds(1f);
		hm.SetMessageActive(false);
	}


    IEnumerator LoadGameScene() {
        AsyncOperation asyncLoad = SceneManager.LoadSceneAsync("GameScene");
        while (!asyncLoad.isDone)
            yield return null;
    }
}