using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace _04_Roli_The_Coder
{
    public class RoliTheCoder
    {
        public static void Main()
        {
            var eventAndIdRegex = new Regex(@"^(?<id>\d+)\s+(?<event>#\w+)");
            var participantsRegex = new Regex(@"@(?<participant>[A-Za-z\d\-\']*)");

            List<Event> events = new List<Event>();
            while (true)
            {
                string line = Console.ReadLine();
                if (line == "Time for Code")
                    break;

                var eventAndIdMatch = eventAndIdRegex.Match(line);
                if (!eventAndIdMatch.Success)
                    continue;

                var eventId = int.Parse(eventAndIdMatch.Groups["id"].Value);
                var eventName = eventAndIdMatch.Groups["event"].Value;

                var participants = participantsRegex.Matches(line).Cast<Match>().Select(p => p.Value.Trim()).ToList();

                if (events.Any(e => e.Id == eventId))
                {
                    var alreadyExistingEvent = events.First(e => e.Id == eventId);

                    if (alreadyExistingEvent.EventName == eventName)
                        alreadyExistingEvent.Participants.AddRange(participants);

                }
                else
                {
                    var @event = new Event(eventId, eventName, new List<string>());
                    @event.Participants.AddRange(participants);
                    events.Add(@event);
                }
            }

            foreach (var @event in events)
            {
                @event.Participants = @event.Participants.Distinct().ToList();
            }

            //PRINT
            foreach (var @event in events.OrderByDescending(e => e.Participants.Count).ThenBy(e => e.EventName))
            {
                Console.WriteLine($"{@event.EventName.TrimStart('#')} - {@event.Participants.Count}");
                var participants = @event.Participants;
                foreach (var participant in participants.OrderBy(p => p))
                {
                    Console.WriteLine($"{participant}");
                }
            }
        }

        public class Event
        {
            public Event(int id, string eventName, List<string> participants)
            {
                Id = id;
                EventName = eventName;
                Participants = participants;
            }

            public int Id { get; set; }

            public string EventName { get; set; }

            public List<string> Participants { get; set; }
        }
    }
}