public static bool AttackIsSafe(Region fromRegion, int attackingArmies, Region toRegion, int defendingArmies, string myName, float confidence)
{
var nonAttackingArmies = fromRegion.Armies - attackingArmies;
BattleResult attackResult = AnalyzeBattle(confidence, defendingArmies, attackingArmies);
List <Region> unconqueredNeighbors;
int expectedArmiesLeftToDefend;
if (attackResult.AttackerExpectedToWinForSure())
{
unconqueredNeighbors = fromRegion.Neighbors.Where(x => x.Id != toRegion.Id).ToList();
expectedArmiesLeftToDefend = nonAttackingArmies;
}
else if (attackResult.AttackerExpectedToWin())
{
unconqueredNeighbors = fromRegion.Neighbors;
expectedArmiesLeftToDefend = nonAttackingArmies;
}
else
{
unconqueredNeighbors = fromRegion.Neighbors;
expectedArmiesLeftToDefend = nonAttackingArmies + attackResult.AttackerRemainingArmiesLow;
}
var toRegionActualArmies = toRegion.Armies;
toRegion.Armies = attackResult.DefenderRemainingArmies;
bool attackIsSafe = (DefensiveArmiesNeeded.For(unconqueredNeighbors, expectedArmiesLeftToDefend, Constants.SafeNumberOfArmiesNeeded) <= Constants.SafeNumberOfArmiesNeeded &&
DefensiveArmiesNeeded.For(toRegion.Neighbors, attackResult.AttackerRemainingArmiesLow, Constants.SafeNumberOfArmiesNeeded) <= Constants.SafeNumberOfArmiesNeeded);
toRegion.Armies = toRegionActualArmies;
return(attackIsSafe);
}
public static int MaximumArmiesNecessaryToConquer(float confidenceForDefiniteWin, float confidenceForPossibleWin, int defenderArmies, int maxAttackerArmiesAvailable)
{
int armiesNeeded = 0;
bool defeated;
do
{
armiesNeeded = System.Math.Min(armiesNeeded + 2, maxAttackerArmiesAvailable);
BattleResult result = AnalyzeBattle(confidenceForDefiniteWin, defenderArmies, armiesNeeded);
defeated = result.AttackerExpectedToWinForSure();
} while (!defeated && armiesNeeded < maxAttackerArmiesAvailable);
// Putting this here so that we don't throw armies away on battles we absolutely cannot win
if (!defeated)
{
BattleResult result = AnalyzeBattle(confidenceForPossibleWin, defenderArmies, maxAttackerArmiesAvailable);
armiesNeeded = (result.AttackerExpectedToWinAtAll()) ? maxAttackerArmiesAvailable : int.MaxValue;
}
return(armiesNeeded);
}