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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace BCDD
{
class ParContract
{
public int Level = 0;
public char Denomination;
public char Declarer;
public bool Doubled = false;
public int Score = 0;
public ParContract() { }
public ParContract(int level, char denom, char declarer, bool doubled, int score)
{
this.Level = level;
this.Denomination = denom;
this.Declarer = declarer;
this.Doubled = doubled;
this.Score = score;
}
public ParContract Validate()
{
if (this.Score == 0)
{
return this;
}
if (this.Level < 1 || this.Level > 7)
{
throw new ParScoreInvalidException("Invalid par contract level: " + this.Level.ToString());
}
if (!"CDHSN".Contains(this.Denomination))
{
throw new ParScoreInvalidException("Invalid par contract denomination: " + this.Denomination);
}
if (!"NESW".Contains(this.Declarer))
{
throw new ParScoreInvalidException("Invalid par contract declarer: " + this.Declarer);
}
return this;
}
override public String ToString()
{
if (this.Score == 0)
{
return "PASS";
}
String contract = this.Level.ToString() + this.Denomination;
String risk = this.Doubled ? "x" : "";
String declarer = " " + this.Declarer;
String result = " " + this.Score.ToString("+#;-#;0");
return contract + risk + declarer + result;
}
public override bool Equals(object other)
{
ParContract obj = (ParContract)(other);
return this.Level == obj.Level && this.Denomination == obj.Denomination && this.Score == obj.Score;
}
public override int GetHashCode()
{
return this.Score + this.Level + 10000 * this.Denomination;
}
public int CalculateScore(int tricks, bool vulnerable = false)
{
if (this.Level == 0)
{
return 0;
}
int score = 0;
if (this.Level + 6 > tricks)
{
int undertricks = this.Level + 6 - tricks;
if (this.Doubled)
{
do
{
if (undertricks == 1) // first undertrick: 100 non-vul, 200 vul
{
score -= vulnerable ? 200 : 100;
}
else
{
if (undertricks <= 3 && !vulnerable) // second non-vul undertrick: 200
{
score -= 200;
}
else // further undertricks: 300
{
score -= 300;
}
}
undertricks--;
}
while (undertricks > 0);
}
else
{
score = vulnerable ? -100 : -50;
score *= undertricks;
}
}
else
{
int parTricks = this.Level;
do
{
if (this.Denomination == 'N' && parTricks == 1) // first non-trump trick: 40
{
score += 40;
}
else // other tricks
{
switch (this.Denomination)
{
case 'N':
case 'S':
case 'H':
score += 30;
break;
case 'D':
case 'C':
score += 20;
break;
}
}
parTricks--;
}
while (parTricks > 0);
if (this.Doubled)
{
score *= 2;
}
score += (score >= 100) ? (vulnerable ? 500 : 300) : 50; // game premium
if (this.Level == 7) // grand slam premium
{
score += vulnerable ? 1500 : 1000;
}
else if (this.Level == 6) // small slam premium
{
score += vulnerable ? 750 : 500;
}
if (this.Doubled)
{
score += 50;
}
int overtricks = tricks - this.Level - 6;
score += this.Doubled
? (vulnerable ? 200 : 100) * overtricks // (re-)double overtricks: 100/200/200/400
: overtricks * ((this.Denomination == 'C' || this.Denomination == 'D') ? 20 : 30); // undoubled overtricks
}
if (this.Declarer == 'E' || this.Declarer == 'W')
{
score = -score;
}
return score;
}
public bool Higher(ParContract obj)
{
return (this.Level > obj.Level
|| (this.Level == obj.Level
&& Array.IndexOf(BCalcWrapper.DENOMINATIONS, this.Denomination) > Array.IndexOf(BCalcWrapper.DENOMINATIONS, obj.Denomination)));
}
public ParContract GetDefense(int[,] ddTable, bool vulnerable)
{
if (this.Level != 0)
{
int declarerIndex = Array.IndexOf(BCalcWrapper.PLAYERS, this.Declarer);
List<int> defendersIndexes = new List<int>();
defendersIndexes.Add((declarerIndex + 1) & 3);
defendersIndexes.Add((declarerIndex + 3) & 3);
List<ParContract> possibleDefense = new List<ParContract>();
int scoreSquared = this.Score * this.Score;
int denominationIndex = Array.IndexOf(BCalcWrapper.DENOMINATIONS, this.Denomination);
for (int i = 0; i < 5; i++)
{
int level = this.Level;
if (i <= denominationIndex)
{
level++;
}
foreach (int defender in defendersIndexes)
{
if (level + 6 > ddTable[defender, i])
{
ParContract defense = new ParContract(level, BCalcWrapper.DENOMINATIONS[i], BCalcWrapper.PLAYERS[defender], true, 0);
defense.Score = defense.CalculateScore(ddTable[defender, i], vulnerable);
if (scoreSquared > this.Score * defense.Score)
{
possibleDefense.Add(defense);
}
}
}
}
if (possibleDefense.Count > 0)
{
possibleDefense.Sort((x, y) => Math.Abs(x.Score - this.Score).CompareTo(Math.Abs(y.Score - this.Score)));
ParContract optimumDefense = possibleDefense.Last();
possibleDefense = possibleDefense.FindAll(x => x.Score == optimumDefense.Score);
foreach (ParContract defense in possibleDefense)
{
if (defense.Higher(optimumDefense))
{
optimumDefense = defense;
}
}
return optimumDefense;
}
}
return null;
}
}
}
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