private int CalculateLifelossScore(EvaluationParameters p)
{
var attackerParameters = GetAttackerParamers(p.Attacker, p.Blockers);
return(ScoreCalculator.CalculateLifelossScore(p.DefendersLife,
QuickCombat.CalculateDefendingPlayerLifeloss(attackerParameters)));
}
private void AssignInitialBlockers(Card attacker, IEnumerable <Card> blockers, int defendersLife)
{
_canAllInitialBlockersBeKilled = true;
var attackerAbilities = attacker.GetCombatAbilities();
var attackerEvaluationParameters = new AttackerEvaluationParameters(attacker,
attackerAbilities.PowerIncrease, attackerAbilities.ToughnessIncrease);
foreach (var blocker in blockers)
{
var blockerAbilities = blocker.GetCombatAbilities();
_blockers.Add(blocker);
attackerEvaluationParameters.AddBlocker(blocker, blockerAbilities.PowerIncrease,
blockerAbilities.ToughnessIncrease);
var canBlockerBeDealtLeathalCombatDamage =
QuickCombat.CanBlockerBeDealtLeathalCombatDamage(new BlockerEvaluationParameters
{
Attacker = attacker,
Blocker = blocker,
BlockerPowerIncrease = blockerAbilities.PowerIncrease,
BlockerToughnessIncrease = blockerAbilities.ToughnessIncrease,
AttackerPowerIncrease = attackerAbilities.PowerIncrease,
AttackerToughnessIncrease = attackerAbilities.ToughnessIncrease
});
var blockerScore = canBlockerBeDealtLeathalCombatDamage && !blockerAbilities.CanRegenerate
? blocker.Score
: 0;
var lifelossScore = ScoreCalculator.CalculateLifelossScore(
defendersLife,
attacker.CalculateCombatDamageAmount(singleDamageStep: false));
var trampleScore = ScoreCalculator.CalculateLifelossScore(
defendersLife, QuickCombat.CalculateTrampleDamage(Attacker, blocker));
Gain = lifelossScore - blockerScore - trampleScore;
_canAllInitialBlockersBeKilled = _canAllInitialBlockersBeKilled && canBlockerBeDealtLeathalCombatDamage;
}
IsAttackerKilled = QuickCombat.CanAttackerBeDealtLeathalDamage(attackerEvaluationParameters);
var attackerScore = IsAttackerKilled && !attackerAbilities.CanRegenerate
? attacker.Score
: 0;
Gain += attackerScore;
}
public Results Evaluate()
{
var results = new Results();
if (!_p.Attacker.Is().Creature || !_p.Attacker.CanBeDestroyed)
{
return(results);
}
var blockers = _p.Blockers;
if (_p.Attacker.HasFirstStrike)
{
blockers = GetOnlyBlockersThatWontBeKilledBeforeTheyDealDamage().ToList();
}
var maxDamageDealtByAnyBlocker = 0;
Card blockerThatDealsMaxDamage = null;
foreach (var blocker in blockers)
{
var amount = QuickCombat.GetAmountOfDamageCreature1WillDealToCreature2(
creature1: blocker.Card,
creature2: _p.Attacker,
powerIncrease: blocker.PowerIncrease);
if (amount > 0 && blocker.Card.Has().Deathtouch)
{
results.ReceivesLeathalDamage = true;
results.DeathTouchDamage += amount;
results.LeathalBlocker = blocker.Card;
}
results.TotalDamage += amount;
if (amount > maxDamageDealtByAnyBlocker)
{
blockerThatDealsMaxDamage = blocker.Card;
maxDamageDealtByAnyBlocker = amount;
}
}
results.ReceivesLeathalDamage = results.ReceivesLeathalDamage ||
results.TotalDamage >= _p.Attacker.Life + _p.AttackerToughnessIncrease;
results.LeathalBlocker = results.LeathalBlocker ?? blockerThatDealsMaxDamage;
return(results);
}
private int CalculateAttackerScore(EvaluationParameters p)
{
if (p.Attacker.Card.Has().Deathtouch)
{
return(0);
}
var attackerParamers = GetAttackerParamers(p.Attacker, p.Blockers);
if (QuickCombat.CanAttackerBeDealtLeathalDamage(attackerParamers) && !p.Attacker.Abilities.CanRegenerate)
{
return(p.Attacker.Card.Score);
}
return(0);
}
private IEnumerable <AttackerEvaluationParameters.Blocker> GetOnlyBlockersThatWontBeKilledBeforeTheyDealDamage()
{
return(_p.Blockers.Where(blocker =>
{
if (blocker.Card.HasFirstStrike || blocker.Card.Has().Indestructible)
{
return true;
}
var attackersDamage = QuickCombat.GetAmountOfDamageCreature1WillDealToCreature2(
creature1: _p.Attacker,
creature2: blocker.Card,
powerIncrease: _p.AttackerPowerIncrease);
return blocker.Card.Life + blocker.ToughnessIncrease > attackersDamage;
}));
}
private bool IncreasesGain(Card additionalBlocker)
{
// attacker was not killed, but blocker was
// check if additional blocker changes things
if (_canAllInitialBlockersBeKilled == false)
{
return(false);
}
if (additionalBlocker.Score > Attacker.Score)
{
return(false);
}
return(QuickCombat.CanAttackerBeDealtLeathalDamage(
Attacker,
_blockers.Concat(additionalBlocker.ToEnumerable())));
}
private int CalculateBlockersScore(EvaluationParameters p)
{
if (p.Blockers.Count == 0)
{
return(0);
}
var blockersRanks = p.Blockers.Select(blocker =>
{
var blockerParameters = GetBlockerParameters(p.Attacker, blocker);
var attackerParameters = GetAttackerParamers(p.Attacker, new[] { blocker });
return(new
{
Blocker = blocker,
CanBeKilled = QuickCombat.CanBlockerBeDealtLeathalCombatDamage(blockerParameters),
CanKill = QuickCombat.CanAttackerBeDealtLeathalDamage(attackerParameters)
});
})
.ToList();
if (blockersRanks.Any(x => !x.CanBeKilled))
{
return(0);
}
var leastValuedBlockerWhoCanKill = blockersRanks.Where(x => x.CanKill)
.OrderBy(x => x.Blocker.Card.Score)
.FirstOrDefault();
if (leastValuedBlockerWhoCanKill != null)
{
return(leastValuedBlockerWhoCanKill.Blocker.Card.Score);
}
return(blockersRanks.OrderBy(x => x.Blocker.Card.Score).First().Blocker.Card.Score);
}
private bool IsSafeBlock(Card additionalBlocker)
{
return(!QuickCombat.CanBlockerBeDealtLeathalCombatDamage(Attacker, additionalBlocker));
}