using System.Collections;
using Cysharp.Threading.Tasks;
using game;
using UnityEngine;
using UnityEngine.SceneManagement;

public class G : Singleton<G>
{
#if UNITY_EDITOR
    public static bool DebugFreezeLevel;
#endif

    public Configs Configs { get; private set; }
    public Session Session { get; private set; }
    public TimeRewards TimeRewards { get; } = new TimeRewards();
    public Level Level => Session != null ? Session.Level : null;

    private GameData _gameData = null;
    private readonly SDK _sdk = new SDK();

    private void Awake()
    {
        StartCoroutine(SafeInit());
    }

    private IEnumerator SafeInit()
    {
        yield return new WaitUntil(() => SceneManager.GetActiveScene().name == "game");
        yield return Init();
    }

    private IEnumerator Init()
        => UniTask.ToCoroutine( async () =>
    {
        LoadConfigs();
        LoadGameSettings();
        LoadGameState();

        CameraManager.Init();
        TimeRewards.Init();
        Sound.Init();
        Ads.Init();
        UI.Init();

        ILoader loader = (ILoader)Loader.Instance ?? new NullLoader();
        await loader.Load(_sdk, 0.5f);

        Session = Session.Create();
        Session.CreateLevel();

        loader.Load(null, 1f);
        loader.Close();
    });

    private void LoadConfigs()
    {
        var asset = Resources.Load<TextAsset>("ext_config/configs/packed_bundle");
        (Configs = new Configs()).Load(new System.IO.MemoryStream(asset.bytes));
    }

    private void LoadGameSettings()
    {
        var levels = Configs.Get<ConfGameLevels>("@game_levels");
        var buffs = Configs.Get<ConfGameBuffs>("@game_buffs");
        GameSettings.Load(levels, buffs);
    }

    private void LoadGameState()
    {
        _gameData = new GameData(Settings.VERSION);
        _gameData.UnregisterPersistentStructures();

        _gameData.RegisterPersistentStructures(

            TimeRewards.Daily,
            TimeRewards.Offline,
            Save.Progress,
            Save.Inventory,
            Save.Buffs
        );

        _gameData.TryLoadOrCreateNew();
    }

    private void OnApplicationQuit()
    {
        SaveGameState();
    }

    private bool SaveGameState()
    {
        if (_gameData.SaveLocal().IsOk() == false)
        {
            Log.Error("G.SaveGameState: Save game state ended with error.");
            return false;
        }

        Log.Debug("G.SaveGameState: Save game state loaded successful.");
        _gameData.RememberSuccessfulSave();
        return true;
    }

    private void OnApplicationPause(bool isPaused)
    {
        if (isPaused)
        {
            SaveGameState();
            return;
        }

        SDK.Reconnect();
    }
}