public ViewModel(RoundTeamMatchup Parent)
{
_Parent = Parent;
}
public ActionResult GenerateConfirmed()
{
if (Session["SelectedEventId"] == null) return Redirect("Events");
if (Session["SelectedRoundId"] == null) return Redirect("Rounds");
int RoundID = 0;
int.TryParse(Session["SelectedRoundId"].ToString(), out RoundID);
int EventID = 0;
int.TryParse(Session["SelectedEventId"].ToString(), out EventID);
int RoundNumber = (from p in db.Rounds where p.RoundId == RoundID && p.EventId == EventID select p.Sequence).First ();
//Ensure the Bye team exists and remove all existing player and team matchups for the round
PerformPreGenerateDataCleanup(EventID, RoundID);
//Hold a list of Teams and the number of Wins they have
Dictionary<Team, int> TeamWins = GenerateTeamWins(EventID);
// remove drops
foreach (var team in (from p in TeamWins where p.Key.DropRound >= RoundNumber select p).ToList())
TeamWins.Remove(team.Key );
var UnPairedTeams = (from p in TeamWins select p.Key).ToList();
var rand = new Random();
var RetryCount = 0;
// this loop will continue until all teams have been successfully paired.
// If something prevents a full pairing (crap random # generator, or invalid data, or a bug) it will try to run the pairings engine 5 times before failing.
while (UnPairedTeams.Count > 0 )
{
//clear bye/pairdown for this round
var q = (from p in UnPairedTeams where p.ByeRound == RoundNumber select p);
foreach (var p in q)
p.ByeRound = null;
q = (from p in UnPairedTeams where p.PairedDownRound == RoundNumber select p);
foreach (var p in q)
p.PairedDownRound = null;
//check for multiple/max attempts
RetryCount += 1;
if (RetryCount>0)
{
TeamWins = GenerateTeamWins(EventID);
// remove drops
foreach (var team in (from p in TeamWins where p.Key.DropRound >= RoundNumber select p).ToList())
TeamWins.Remove(team.Key);
}
if (RetryCount > 5)
{
//Something is preventing all pairings
throw new Exception("Unable to complete pairings! Please use manual Round Team Matchups.");
}
try
{
var Wins = (from p in TeamWins orderby p.Value descending select p.Value).FirstOrDefault();
while (Wins >= -1)
{
// Pre pairing cleanup, identify pairdown and byes
var AvailableTeams = (from p in TeamWins where p.Value == Wins select p).ToList();
// If we're in the 0 wins group and there are an odd number of teams, drop the BYE team
if (Wins == 0 && AvailableTeams.Count() % 2 == 1)
{
var ByeTeam = (from p in AvailableTeams where p.Key.Name == "BYE" select p).First ();
AvailableTeams.Remove(ByeTeam);
TeamWins.Remove(ByeTeam.Key );
UnPairedTeams.Remove(ByeTeam.Key );
}
if (AvailableTeams.Count() % 2 != 0)
{
//Pairdown Logic
var PairdownCandidates = from p in AvailableTeams where p.Key.PairedDownRound == null select p.Key;
var Pairdown = PairdownCandidates.ElementAt(rand.Next(PairdownCandidates.Count()));
Pairdown.PairedDownRound = RoundNumber;
TeamWins[Pairdown] -= 1; //force the team into the next lower wins bucket
AvailableTeams = (from p in TeamWins where p.Value == Wins select p).ToList();
}
// Find pairings for all available teams (in this win bucket)
while (AvailableTeams.Count > 0)
{
// get a random team from this wins bucket (or Bye if it's available)
var Team1 = AvailableTeams.ElementAt(rand.Next(AvailableTeams.Count()));
if ((from p in AvailableTeams where p.Key.Name == "BYE" select p).Count () > 0)
{
Team1 = (from p in AvailableTeams where p.Key.Name == "BYE" select p).First();
}
// build a list of previous opponents
var PreviousOpponents = (from p in db.RoundTeamMatchups where p.Team1.TeamId == Team1.Key.TeamId select p.Team2).ToList();
PreviousOpponents.AddRange((from p in db.RoundTeamMatchups where p.Team2.TeamId == Team1.Key.TeamId select p.Team1).ToList());
// pull a list of possible opponents (teams in this win bucket excluding previous opponents)
var AvailableOpponents = (from p in AvailableTeams where !PreviousOpponents.Contains(p.Key) && p.Key != Team1.Key select p).ToList();
if (AvailableOpponents.Count() == 0)
{
// something really bad just happened.
throw new Exception("No valid opponents.");
}
// get a random team from the available opponents bucket
var Team2 = AvailableOpponents.ElementAt(rand.Next(AvailableOpponents.Count()));
// get a list of all tablezones played on by either team
var PreviousTables = (from p in db.RoundTeamMatchups where p.Team1Id == Team1.Key.TeamId || p.Team2Id == Team1.Key.TeamId || p.Team1Id == Team2.Key.TeamId || p.Team2Id == Team2.Key.TeamId select p.TableZone).ToList();
// get a list of all tablezones in use thie round
var UsedTables = (from p in db.RoundTeamMatchups where p.RoundId == RoundID select p.TableZone).ToList();
// get the max tablezone #
var MaxTableZoneNumber = ((from p in db.Teams where p.EventId == EventID select p).Count() / 2 +1);
// get a list of ALL tables
var AvailableTables = Enumerable.Range(1, MaxTableZoneNumber).ToList();
// Get all tables not currently in use
AvailableTables = (from p in AvailableTables where !UsedTables.Contains(p) select p).ToList();
var FreshTables = (from p in AvailableTables where !PreviousTables.Contains(p) select p).ToList();
if (FreshTables.Count() == 0)
{
// No fresh tables available, someone is getting a repeat
FreshTables = AvailableTables;
}
if (FreshTables.Count() == 0)
{
// Something really bad just happened.
throw new Exception("No valid tables.");
}
var Table = FreshTables.ElementAt(rand.Next(FreshTables.Count()));
// save the pairing
var RoundTeamMatchup = new RoundTeamMatchup();
RoundTeamMatchup.RoundId = RoundID;
RoundTeamMatchup.Team1Id = Team1.Key.TeamId;
RoundTeamMatchup.Team2Id = Team2.Key.TeamId;
RoundTeamMatchup.TableZone = Table;
db.RoundTeamMatchups.Add(RoundTeamMatchup);
if (Team1.Key.Name=="BYE")
{
Team2.Key.ByeRound = RoundNumber;
var ByePlayer = (from p in db.Players where p.Team.Name == "BYE" && p.Team.EventId == EventID select p).First();
var Players = (from p in db.Players where p.TeamId == Team2.Key.TeamId select p);
foreach (var player in Players )
{
var matchup = new Matchup();
matchup.Player1Id = ByePlayer.PlayerId;
matchup.Player2Id = player.PlayerId;
matchup.WinnerId = player.PlayerId;
matchup.Player2APD = 50;
matchup.Player2CP = 3;
db.Matchups.Add(matchup);
}
}
db.SaveChanges();
//Cleanup for next pass
AvailableTeams.Remove(Team1);
AvailableTeams.Remove(Team2);
UnPairedTeams.Remove(Team1.Key);
UnPairedTeams.Remove(Team2.Key);
}
Wins -= 1;
}
}
catch { }
}
return RedirectToAction("Index", "RoundTeamMatchups");
}