using Gameboard.ShogiUI.Sockets.Models;
using Gameboard.ShogiUI.Sockets.Repositories;
using System;
using System.Threading.Tasks;

namespace Gameboard.ShogiUI.Sockets.Managers
{
  public interface IGameboardManager
  {
    Task<string> CreateGuestUser();
    Task<bool> IsPlayer1(string sessionName, string playerName);
    bool IsGuest(string playerName);
    Task<bool> CreateSession(SessionMetadata session);
    Task<Session?> ReadSession(string gameName);
    Task<bool> UpdateSession(Session session);
    Task<bool> AssignPlayer2ToSession(string sessionName, string userName);
  }

  public class GameboardManager : IGameboardManager
  {
    private const int MaxTries = 3;
    private const string GuestPrefix = "Guest-";
    private readonly IGameboardRepository repository;

    public GameboardManager(IGameboardRepository repository)
    {
      this.repository = repository;
    }

    public async Task<string> CreateGuestUser()
    {
      var count = 0;
      while (count < MaxTries)
      {
        count++;
        var clientId = $"Guest-{Guid.NewGuid()}";
        var isCreated = await repository.CreateGuestUser(clientId);
        if (isCreated)
        {
          return clientId;
        }
      }
      throw new OperationCanceledException($"Failed to create guest user after {MaxTries} tries.");
    }

    public async Task<bool> IsPlayer1(string sessionName, string playerName)
    {
      //var session = await repository.GetGame(sessionName);
      //return session?.Player1 == playerName;
      return true;
    }

    public async Task<string> CreateJoinCode(string sessionName, string playerName)
    {
      //var session = await repository.GetGame(sessionName);
      //if (playerName == session?.Player1)
      //{
      //  return await repository.PostJoinCode(sessionName, playerName);
      //}
      return string.Empty;
    }

    public Task<bool> CreateSession(SessionMetadata session)
    {
      return repository.CreateSession(session);
    }

    public bool IsGuest(string playerName) => playerName.StartsWith(GuestPrefix);

    public Task<Session?> ReadSession(string sessionName)
    {
      return repository.ReadSession(sessionName);
    }

    /// <summary>
    /// Saves the session to storage.
    /// </summary>
    /// <param name="session">The session to save.</param>
    /// <returns>True if the session was saved successfully.</returns>
    public Task<bool> UpdateSession(Session session)
    {
      return repository.UpdateSession(session);
    }

    public async Task<bool> AssignPlayer2ToSession(string sessionName, string userName)
    {
      var isSuccess = false;
      var session = await repository.ReadSession(sessionName);
      if (session != null && !session.IsPrivate && string.IsNullOrEmpty(session.Player2))
      {
        session.SetPlayer2(userName);
        if (await repository.UpdateSession(session))
        {
          isSuccess = true;
        }
      }
      return isSuccess;
    }
  }
}