using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace P09_TeamworkProjects
{
    class P09_TeamworkProjects
    {
        static void Main(string[] args)
        {
            var usersList = new List<User>();
            List<Team> teams = CreateTeams(ref usersList);
            teams = AddMembersToTeams(teams, usersList);
            var sortedTeams = teams
                .OrderByDescending(c => c.MembersCount)
                .ThenBy(n => n.Name)
                .ToList();

            PrintTeams(sortedTeams);
        }

        static void PrintTeams(List<Team> sortedTeams)
        {
            var teamsToPrint = sortedTeams
                .Where(m => m.IsHavingMembers)
                .OrderByDescending(c => c.Members.Count)
                .ThenBy(n => n.Name)
                .ToList();

            foreach (var team in teamsToPrint)
            {
                Console.WriteLine(team.Name);
                Console.WriteLine($"- {team.Creator}");
                foreach (var member in team.Members)
                {
                    Console.WriteLine($"-- {member}");
                }
            }


            var teamsToDisband = sortedTeams
                .Where(m => !m.IsHavingMembers)
                .OrderBy(n => n.Name)
                .ToList();

            Console.WriteLine("Teams to disband:");
            foreach (var team in teamsToDisband)
            {
                Console.WriteLine(team.Name);
            }

        }

        static List<Team> AddMembersToTeams(List<Team> teams, List<User> usersList)
        {
            var command = Console.ReadLine();

            while (command != "end of assignment")
            {
                var nameAndTeam = command.Split(new string[] { "->" }, StringSplitOptions.None).ToList();
                var userName = nameAndTeam[0];
                var teamName = nameAndTeam[1];

                var existingUser = AddUserIfNew(usersList, userName);

                var existingTeam = teams.FirstOrDefault(t => t.Name == teamName);
                if (existingTeam == null)
                {
                    Console.WriteLine($"Team {teamName} does not exist!");
                    command = Console.ReadLine();
                    continue;
                }

                if (existingUser.IsMemberOfTeam)
                {
                    Console.WriteLine($"Member {userName} cannot join team {teamName}!");
                    command = Console.ReadLine();
                    continue;
                }
                if (existingTeam.Members == null)
                {
                    existingTeam.Members = new List<string>();
                }
                existingTeam.Members.Add(userName);
                existingTeam.IsHavingMembers = true;
                existingUser.IsMemberOfTeam = true;


                command = Console.ReadLine();
            }

            return teams;
        }

        static List<Team> CreateTeams(ref List<User> usersList)
        {
            var teamsCount = int.Parse(Console.ReadLine());
            var teams = new List<Team>(teamsCount);
            //var usersList = userList;
            for (int i = 0; i < teamsCount; i++)
            {
                var userAndTeam = Console.ReadLine().Split('-').ToList();
                var userName = userAndTeam[0];
                var teamName = userAndTeam[1];

                var existingUser = AddUserIfNew(usersList, userName);

                var existingTeam = teams.FirstOrDefault(t => t.Name == teamName);
                if (existingTeam != null)
                {
                    Console.WriteLine($"Team {teamName} was already created!");
                    //usersList = usersList.Where(u => u.Name != userName).ToList();////
                    continue;
                }
                if (existingUser.IsMemberOfTeam)
                {
                    Console.WriteLine($"{userName} cannot create another team!");
                    continue;
                }

                AddNewTeam(teams, userName, teamName);
                existingUser.IsMemberOfTeam = true;

            }

            return teams;
        }

        static void AddNewTeam(List<Team> teams, string userName, string teamName)
        {
            Team newTeam = new Team
            {
                Name = teamName,
                Creator = userName,
                IsHavingMembers = false
            };

            Console.WriteLine($"Team {teamName} has been created by {userName}!");
            teams.Add(newTeam);
        }

        static User AddUserIfNew(List<User> usersList, string userName)
        {
            var existingUser = usersList.FirstOrDefault(u => u.Name == userName);
            if (existingUser == null)
            {
                var newUser = new User
                {
                    Name = userName,
                    IsMemberOfTeam = false
                };

                usersList.Add(newUser);
                return newUser;
            }
            return existingUser;

        }
    }

    class Team
    {
        public string Name { get; set; }
        public string Creator { get; set; }
        public List<string> Members { get; set; }
        public bool IsHavingMembers { get; set; }
        public int MembersCount
        {
            get
            {
                return IsHavingMembers ? Members.Count : 0;
            }
        }
    }

    class User
    {
        public string Name { get; set; }
        public bool IsMemberOfTeam { get; set; }
    }
}