using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;
using Telegram.Bot;
using Telegram.Bot.Args;
using Telegram.Bot.Types.ReplyMarkups;

namespace ZaoBot
{
	class BotService
	{
		private JsonDocument config;
		static ITelegramBotClient botClient;
		Dictionary<long, IUserState> userStates = new Dictionary<long, IUserState>();
		private OpenHab.OpenHabClient openhab;

		bool shouldRestart = false;

		public BotService(JsonDocument config)
		{
			this.config = config;
		}

		public void Run()
		{
			var token = config.RootElement.GetProperty("token").GetString();
			shouldRestart = false;
			botClient = new TelegramBotClient(token);
			openhab = new OpenHab.OpenHabClient(config.RootElement.GetProperty("openhab_url").GetString());
			var me = botClient.GetMeAsync().Result;
			Console.WriteLine($"Hello, World! I am user {me.Id} and my name is {me.FirstName}.");
			botClient.OnMessage += OnBotMessage;
			botClient.StartReceiving();
			while (!shouldRestart)
			{
				Thread.Sleep(1000);
			}
		}

		private async void OnBotMessage(object sender, MessageEventArgs e)
		{
			try
			{
				if (e.Message.Text != null)
				{
					var id = e.Message.Chat.Id;
					IUserState state = null;
					if (userStates.ContainsKey(id))
					{
						state = userStates[id];
					}
					if (state == null)
					{
						state = new MainMenuUserState(botClient, config, openhab);
					}
					state = await state.ProcessMessage(state, e);
					if (state == null)
					{
						await botClient.SendTextMessageAsync(
							chatId: e.Message.Chat,
							text: "Я запутался, давайте сначала"
						);
						state = new MainMenuUserState(botClient, config, openhab);
						state = await state.ProcessMessage(state, e);
					}
					userStates[id] = state;
				}
			}
			catch (Exception ex)
			{
				Console.WriteLine("Exception: " + ex.Message);
				Console.WriteLine(ex.StackTrace);
				Console.WriteLine("Restarting bot");
				shouldRestart = true;
			}
		}
	}
}