using Microsoft.Extensions.DependencyInjection;
using System;
using System.Globalization;
using System.IO;
using System.Reflection;
using System.Text.Json;
using System.Threading;
using Telegram.Bot;
using ZaoBot.Config;
using ZaoBot.OpenHab;
using ZaoBot.Problems;

namespace ZaoBot
{
	class Program
	{
		static BotService bot;
		static JsonDocument config;

		static ServiceCollection services;

		static void Main(string[] args)
		{
			CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
			config = LoadConfig();
			services = new ServiceCollection();
			services.AddSingleton<IConfig, Config.Config>(CreateConfig);
			services.AddSingleton<OpenHabClient, OpenHabClient>();
			services.AddSingleton<NotificationReceiver, NotificationReceiver>();
			services.AddSingleton<StatusManager, StatusManager>();

			services.AddScoped<BotService, BotService>();
			services.AddScoped<IServiceProvider, IServiceProvider>(p => p);
			services.AddScoped<ITelegramBotClient, TelegramBotClient>(CreateTelegramBot);
			
			services.AddTransient<MainMenuUserState, MainMenuUserState>();
			services.AddTransient<StatusMenuUserState, StatusMenuUserState>();
			services.AddTransient<CamerasMenuUserState, CamerasMenuUserState>();
			using (var provider = services.BuildServiceProvider())
			{
				var receiver = provider.GetRequiredService<NotificationReceiver>();
				var notificationThread = new Thread(new ThreadStart(receiver.Run));
				notificationThread.Start();
				while (true)
				{
					try
					{
						using (var scope = provider.CreateScope())
						{
							bot = scope.ServiceProvider.GetRequiredService<BotService>();
							bot.Run();
						}
					}
					catch (Exception e)
					{
						// Тут ловим всё, при ошибках просто заново поднимаем бота
						Console.WriteLine("Exception: " + e.Message);
						Console.WriteLine(e.StackTrace);
						Console.WriteLine("Restarting bot");
					}
				}
			}
		}

		private static TelegramBotClient CreateTelegramBot(IServiceProvider arg)
		{
			var token = config.RootElement.GetProperty("token").GetString();
			return new TelegramBotClient(token);
		}

		private static Config.Config CreateConfig(IServiceProvider arg)
		{
			return new Config.Config(config);
		}

		private static JsonDocument LoadConfig()
		{
			string assemblyFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
			var config = Path.Combine(assemblyFolder, "zaobot.json");
			string configStr = File.ReadAllText(config);
			return JsonDocument.Parse(configStr);
		}
	}
}