05. Teamwork Projects

using System;
using System.Collections.Generic;
using System.Linq;

namespace _05._TeamworkProjects
{
    class Program
    {
        static void Main(string[] args)
        {
            // 1. Read Input
            int teamsCount = int.Parse(Console.ReadLine());

            // 2. Create [teamsCount] teams
            List<string> teamsMembers = new List<string>();
            List<Team> teams = CreateTeams(teamsCount, teamsMembers);
            List<string> teamsToDisban = new List<string>();

            // 3. Add Members to teams
            AddMembers(teams, teamsMembers);

            // 4. Sort Teams
            teams = teams.OrderBy(order => order.Members.Count).ToList();
            teams.Reverse();

            // 5. print valid teams
            foreach (Team team in teams)
            {
                if (team.Members.Count > 0)
                {
                    team.Print();
                }
                else
                {
                    teamsToDisban.Add(team.TeamName);
                }
            }

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

        private static void AddMembers(List<Team> teams, List<string> teamsMembers)
        {
            string input = Console.ReadLine();
            while (input != "end of assignment")
            {
                string[] memberInfo = input.Split("->", StringSplitOptions.RemoveEmptyEntries);
                string user = memberInfo[0];
                string team = memberInfo[1];

                bool isTeamContains = IsTeamExists(teams, team);
                if (!isTeamContains)
                {
                    Console.WriteLine($"Team {team} does not exist!");
                }
                else
                {
                    if (teamsMembers.Contains(user))
                    {
                        Console.WriteLine($"Member {user} cannot join team {team}!");
                    }
                    else
                    {
                        teamsMembers.Add(user);
                        teams = AddMember(teams, user, team);
                    }
                }

                input = Console.ReadLine();
            }
        }

        private static List<Team> AddMember(List<Team> teams, string user, string team)
        {
            for (int i = 0; i < teams.Count; i++)
            {
                if (teams[i].TeamName == team)
                {
                    teams[i].Members.Add(user);
                }
            }

            return teams;
        }

        private static List<Team> CreateTeams(int teamsCount, List<string> TeamsMembers)
        {
            List<Team> teams = new List<Team>(teamsCount);

            for (int i = 0; i < teamsCount; i++)
            {
                // 2.1 Read input
                string[] input = Console.ReadLine()
                .Split("-", StringSplitOptions.RemoveEmptyEntries);
                string creator = input[0];
                string teamName = input[1];

                // 2.2 Create Team
                bool isTeamContains = IsTeamExists(teams, teamName);
                if (isTeamContains)
                {
                    Console.WriteLine($"Team {teamName} was already created!");
                }
                else
                {
                    bool isCreatorContains = IsCreatorExists(teams, creator);
                    if (isCreatorContains)
                    {
                        Console.WriteLine($"{creator} cannot create another team!");
                    }
                    else
                    {
                        Team newTeam = new Team(creator, teamName);
                        // 2.3 Add Team to list
                        teams.Add(newTeam);
                        TeamsMembers.Add(creator);

                        // 2.4 Print "Team {teamName} has been created by {user}!".
                        Console.WriteLine($"Team {newTeam.TeamName} has been created by {input[0]}!");
                    }
                }
            }

            return teams;
        }

        private static bool IsCreatorExists(List<Team> teams, string creator)
        {
            bool isContains = false;
            for (int i = 0; i < teams.Count; i++)
            {
                if (creator == teams[i].Creator)
                {
                    isContains = true;
                    break;
                }
            }

            return isContains;
        }

        private static bool IsTeamExists(List<Team> teams, string teamName)
        {
            bool isContains = false;
            for (int i = 0; i < teams.Count; i++)
            {
                if (teamName == teams[i].TeamName)
                {
                    isContains = true;
                    break;
                }
            }

            return isContains;
        }
    }

    class Team
    {
        public Team(string creator, string name)
        {
            Creator = creator;
            TeamName = name;
            Members = new List<string>();
        }
        public string TeamName { get; set; }
        public string Creator { get; set; }
        public List<string> Members { get; set; }

        public void Print()
        {
            Console.WriteLine($"{TeamName}");
            Console.WriteLine($"- {Creator}");
            Members.Sort();
            foreach (var member in Members)
            {
                Console.WriteLine($"-- {member}");
            }
        }
    }
}