namespace WebEMSim
{
    public class Storage
    {
        public static Storage Shared = new Storage();

        private Dictionary<string, Tournament> tournamentStore = new Dictionary<string, Tournament>();

        public Tournament? CreateTournament()
        {
            Tournament tournament = new();

            string id = tournament.ID;

            bool success = tournamentStore.TryAdd(id, tournament);

            if (!success) return null;

            return tournament;
        }

        public Tournament? GetTournament(string id)
        {
            Tournament? tournament = null;
            bool success = tournamentStore.TryGetValue(id, out tournament);

            if(!success)
                return null;

            return tournament;
        }

        public List<string> ListTournaments()
        {
            return [.. tournamentStore.Keys];
        }

        public bool? DeleteTournament(string id)
        {
            Tournament? tournament = null;
            bool found = tournamentStore.TryGetValue(id, out tournament);

            if (!found)
                return null;

            return tournamentStore.Remove(id);
        }
    }
}