using System;
using System.Threading.Tasks;
using UnityEngine;
using VContainer;
using Vanguard.Api;
using Vanguard.Auth;
using Vanguard.Meta;
using Vanguard.State;
using Vanguard.UI;

namespace Vanguard.App
{
    /// <summary>
    /// Composition root клиента. Создаётся из runtime-инициализатора, поэтому
    /// не зависит от содержимого сцены; сцены появятся позже.
    /// </summary>
    public sealed class VanguardApp : MonoBehaviour
    {
        public static string LastInitializationError { get; private set; }

        private IObjectResolver _container;
        private AppRootView _root;

        private void Awake()
        {
            try
            {
                DontDestroyOnLoad(gameObject);
                Application.targetFrameRate = 60;

                var config = new AppConfig();
                config.Load();

                var builder = new ContainerBuilder();
                builder.RegisterInstance(config);
                builder.Register<TokenStore>(Lifetime.Singleton);
                builder.Register<PlayerState>(Lifetime.Singleton);
                builder.Register<ApiClient>(Lifetime.Singleton);
                builder.Register<AuthService>(Lifetime.Singleton);
                builder.Register<MetaService>(Lifetime.Singleton);
                builder.Register<AppRootView>(Lifetime.Singleton);

                _container = builder.Build();
                _root = _container.Resolve<AppRootView>();
                _root.Initialize();

                _ = RestoreSessionAsync();
            }
            catch (Exception exception)
            {
                LastInitializationError = exception.ToString();
                Debug.LogException(exception);
            }
        }

        private async Task RestoreSessionAsync()
        {
            var auth = _container.Resolve<AuthService>();

            try
            {
                if (await auth.TryRestoreAsync())
                {
                    _root.ShowAfterLogin();
                    return;
                }
            }
            catch (Exception exception)
            {
                Debug.LogException(exception);
            }

            _root.ShowLogin("Введите данные игрока.");
        }

        private void Update()
        {
            _root?.Tick();
        }

        private void OnDestroy()
        {
            if (_container is IDisposable disposable)
                disposable.Dispose();
        }
    }
}