private static BetRatesEntity GetGameRates(TeamStatisticsModel homeTeam, TeamStatisticsModel awayTeam, int leagueSize)
{
var positionDifference = GetPositionDifference(homeTeam, awayTeam);
var probabilityInitialFactor = CalculateInitialProbabilityFactor(positionDifference);
var initialProbability = GetInitialProbability(homeTeam, awayTeam, probabilityInitialFactor);
var randomExtraProbability = GetRandomExtraProbability(positionDifference, leagueSize);
var homeTeamWinProbability =
initialProbability.HomeTeamWinFactor + randomExtraProbability.HomeTeamWinFactor;
var awayTeamWinProbability =
initialProbability.AwayTeamWinFactor + randomExtraProbability.AwayTeamWinFactor;
var tieProbability =
initialProbability.TieFactor + randomExtraProbability.TieFactor;
homeTeamWinProbability = InverseNumber(homeTeamWinProbability);
awayTeamWinProbability = InverseNumber(awayTeamWinProbability);
tieProbability = InverseNumber(tieProbability);
homeTeamWinProbability = SubtractGamblingCompanyFactor(homeTeamWinProbability);
awayTeamWinProbability = SubtractGamblingCompanyFactor(awayTeamWinProbability);
tieProbability = SubtractGamblingCompanyFactor(tieProbability);
return(new BetRatesEntity
{
HomeTeamWinRate = (float)Math.Round(homeTeamWinProbability, 2),
AwayTeamWinRate = (float)Math.Round(awayTeamWinProbability, 2),
TieRate = (float)Math.Round(tieProbability, 2)
});
}
private static ProbabilityFactorsModel GetInitialProbability(TeamStatisticsModel homeTeam, TeamStatisticsModel awayTeam, float probabilityInitialFactor)
{
var homeTeamWinInitialProbability = RatesConstants.WinInitialProbability + (homeTeam.Position < awayTeam.Position ? probabilityInitialFactor : -probabilityInitialFactor);
var awayTeamWinInitialProbability = RatesConstants.WinInitialProbability + (homeTeam.Position > awayTeam.Position ? probabilityInitialFactor : -probabilityInitialFactor);
var tieInitialProbability = RatesConstants.CertainEventProbability - (homeTeamWinInitialProbability + awayTeamWinInitialProbability);
return(new ProbabilityFactorsModel
{
HomeTeamWinFactor = homeTeamWinInitialProbability,
AwayTeamWinFactor = awayTeamWinInitialProbability,
TieFactor = tieInitialProbability
});
}
/// <summary>
///
/// </summary>
/// <param name="groupsToRetrieve">Groups sent in request</param>
/// <returns></returns>
public IList <ChampionsLeagueModel> CalculateStatistics(string groupsToRetrieve)
{
IList <ChampionsLeagueModel> championsLeagueScore = new List <ChampionsLeagueModel>();
IList <string> groups = FilterGroups(groupsToRetrieve);
foreach (var group in groups)
{
IList <ScoreModel> teamsForGroup = RetrieveTeamsForGroup(group);
IDictionary <string, int> teamScores = GetScoreForTeamsInGroup(teamsForGroup);
string leagueName = teamsForGroup.Select(x => x.LeagueTitle).FirstOrDefault();
IList <TeamStatisticsModel> statisticsOfTeams = new List <TeamStatisticsModel>();
foreach (var team in teamScores.Keys)
{
int goalsSum = CountGoalsStatistics(team, EGoalsStatistics.Achieved);
TeamStatisticsModel teamModel = new TeamStatisticsModel
{
Team = team,
PlayedGames = CountPlayedGames(team),
Points = teamScores.Where(x => x.Key.Equals(team)).Select(x => x.Value).First(),
Goals = goalsSum,
GoalsAgainst = CountGoalsStatistics(team, EGoalsStatistics.Against),
GoalDifference = goalsSum - CountGoalsStatistics(team, EGoalsStatistics.Received),
Win = CountGamesOutcomes(team, EGameOutcome.Win),
Lose = CountGamesOutcomes(team, EGameOutcome.Lose),
Draw = CountGamesOutcomes(team, EGameOutcome.Draw),
};
statisticsOfTeams.Add(teamModel);
}
UpdateRanks(statisticsOfTeams);
var sortedList = statisticsOfTeams.OrderBy(x => x.Rank).ToList();
ChampionsLeagueModel championsLeague = new ChampionsLeagueModel
{
LeagueTitle = leagueName,
MatchDay = sortedList.Select(x => x.PlayedGames).FirstOrDefault(),
Group = group,
Standing = sortedList
};
championsLeagueScore.Add(championsLeague);
}
return(championsLeagueScore);
}
private static int GetPositionDifference(TeamStatisticsModel homeTeamStatistics, TeamStatisticsModel awayTeamStatistics) => Math.Abs(homeTeamStatistics.Position - awayTeamStatistics.Position);