using System;
using System.Threading;
using System.Threading.Tasks;
using Telegram.Bot;
using Telegram.Bot.Extensions.Polling;
using Telegram.Bot.Types;
using Telegram.Bot.Exceptions;
using Telegram.Bot.Types.ReplyMarkups;
using System.Text.RegularExpressions;
using System.Net;
namespace TelegramBotExperiments
{
    class Program
    {
        static ITelegramBotClient bot = new TelegramBotClient("Мій токен");
        public static async Task HandleUpdateAsync(ITelegramBotClient botClient, Update update, CancellationToken cancellationToken)
        {
            Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(update));
            if (update.Type == Telegram.Bot.Types.Enums.UpdateType.Message)
            {
                var message = update.Message;
                if (message.Text.ToLower() == "/start")
                {
                    await botClient.SendTextMessageAsync(message.Chat, "Привіт!");
                    return;
                }
                if(message.Text.ToLower().Contains("/api"))
                {
                    try
                    {
                        Match latitude;
                        Match longitude;
                        string information;
                        Match match = Regex.Match(message.Text, "/api (.*?)");
                        using (WebClient wc = new WebClient())
                            information = wc.DownloadString($"http://free.ipwhois.io/xml/{match.Groups[1].Value}");
                        latitude = Regex.Match(information, "<latitude>(.*?)</latitude>");
                        longitude = Regex.Match(information, "<longitude>(.*?)</longitude>");
                        await botClient.SendLocationAsync(
                            chatId: message.Chat.Id,
                            longitude: Convert.ToDouble(longitude.Groups[1].Value),
                            latitude: Convert.ToDouble(latitude.Groups[1].Value),
                            cancellationToken: cancellationToken);
                    }
                    catch(Exception e)
                    {
                        await botClient.SendTextMessageAsync(message.Chat, e.Message);
                    }
                }
                
            }
        }
        public static async Task HandleErrorAsync(ITelegramBotClient botClient, Exception exception, CancellationToken cancellationToken)
        {
            Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(exception));
        }
        static void Main(string[] args)
        {
            var cts = new CancellationTokenSource();
            var cancellationToken = cts.Token;
            var receiverOptions = new ReceiverOptions
            {
                AllowedUpdates = { },
            };
            bot.StartReceiving(
                HandleUpdateAsync,
                HandleErrorAsync,
                receiverOptions,
                cancellationToken
            );
            Console.ReadLine();
        }
    }
}