public async Task <int> RecordMultiPlayerGame(MultiPlayerMatchRequest payload)
{
var winningTeam = new List <Rating>();
var losingTeam = new List <Rating>();
float winningTeamScore = 0;
float losingTeamScore = 0;
//create the match because we need the match id for later use
var match = new Match()
{
GameId = payload.GameId,
Date = DateTime.Now
};
_dbContext.Matches.Add(match);
_dbContext.SaveChanges();
var multiPlayerTable = new List <MultiPlayerMatch>();
foreach (var player in payload.Players)
{
var currentPlayer = _dbContext.Ratings.FirstOrDefault(p => p.PlayerId == player.PlayerId && p.GameId == payload.GameId);
//Player never played this game before
if (currentPlayer == null)
{
currentPlayer = new Rating {
PlayerId = player.PlayerId, Score = 2400, GameId = payload.GameId, LastUpdateDate = DateTime.Now
};
_dbContext.Ratings.Add(currentPlayer);
_dbContext.SaveChanges();
}
if (player.IsWinner)
{
winningTeam.Add(currentPlayer);
winningTeamScore += currentPlayer.Score;
}
else
{
losingTeam.Add(currentPlayer);
losingTeamScore += currentPlayer.Score;
}
var multiPlayObject = new MultiPlayerMatch()
{
MatchId = match.Id,
PlayerId = player.PlayerId,
IsWinner = player.IsWinner
};
multiPlayObject.LastUpdateDate = DateTime.Now;
multiPlayerTable.Add(multiPlayObject);
}
//Average team score
if (winningTeam.Any())
{
winningTeamScore = winningTeamScore / winningTeam.Count;
}
else
{
winningTeamScore = 0;
}
if (losingTeam.Any())
{
losingTeamScore = losingTeamScore / losingTeam.Count;
}
else
{
losingTeamScore = 0;
}
float playerScoreImpact = 0;
var kFactor = _dbContext.Games.First(g => g.Id == payload.GameId).KFactor;
var newScores = _matchService.CalculateNewEloScore(Convert.ToDecimal(winningTeamScore), Convert.ToDecimal(losingTeamScore), payload.GameId, kFactor);
float newWinningEloScore = float.Parse(newScores.WinningNewEloScore.ToString(),
CultureInfo.InvariantCulture.NumberFormat);
playerScoreImpact = newWinningEloScore - winningTeamScore;
foreach (var player in winningTeam)
{
//var pointsDifference = Math.Abs(float.Parse(newScores.WinningNewEloScore.ToString(), CultureInfo.InvariantCulture.NumberFormat) - player.Score);
player.Score += playerScoreImpact;
player.LastUpdateDate = DateTime.Now;
}
foreach (var player in losingTeam)
{
//var pointsDifference = Math.Abs(player.Score - float.Parse(newScores.LosingNewEloScore.ToString(), CultureInfo.InvariantCulture.NumberFormat));
player.Score -= playerScoreImpact;
player.LastUpdateDate = DateTime.Now;
}
_dbContext.Ratings.UpdateRange(winningTeam);
_dbContext.Ratings.UpdateRange(losingTeam);
await _dbContext.MultiPlayerMatches.AddRangeAsync(multiPlayerTable);
await _dbContext.SaveChangesAsync();
return((int)Math.Round(playerScoreImpact));
}