/// <summary>
/// Performs a fight between two army compositions.
/// Updates the experience of the winner army.
/// </summary>
/// <param name="winnerArmyComposition"></param>
/// <param name="loserArmyComposition"></param>
/// <returns></returns>
public static ArmyComposition Fight(ArmyComposition winnerArmyComposition,
ArmyComposition loserArmyComposition)
{
var powerDifference = winnerArmyComposition.ArmyPower() - loserArmyComposition.ArmyPower();
//The losses have the square root dependency.
var mortalityRate = Math.Sqrt(powerDifference / winnerArmyComposition.ArmyPower());
//The experience increased quadratically, based on the relative power of armies.
//Quadratic dependency mainly to decrease the huge role of the experience at the final part of the game.
var experienceIncrease = 1 + Math.Pow(loserArmyComposition.ArmyPower() / winnerArmyComposition.ArmyPower(), 2);
return(winnerArmyComposition.ArmyCompositionAfterFight(mortalityRate,
winnerArmyComposition.Experience * experienceIncrease));
}
/// <summary>
/// Checks that first army is more powerful than second.
/// </summary>
public static bool IsFirstWinner(ArmyComposition firstArmyComposition,
ArmyComposition secondArmyComposition)
{
var firstArmyPower = firstArmyComposition.ArmyPower();
var secondArmyPower = secondArmyComposition.ArmyPower();
return(firstArmyPower >= secondArmyPower);
}