public static card[] leftovers(card[] hand)
{
var rv = new card[52-hand.Length];
int idx =0;
for (int i = 0; i < 52; i++)
{
if(!hand.Any<card>(x => i == x.id))
rv[idx++] = new card(i);
}
return rv;
}
public hand(card[] cards)
{
this.cards = cards;
}
public static int[][] discardDist(card[] hand)
{
var cntA = new int[15][];
int cnti = 0;
var cards = new card[4];
var rem = leftovers(hand);
for (int i = 0; i < hand.Length; i++) // first discard
for (int j = i+1; j < hand.Length; j++, cnti++) // second discard
{
cntA[cnti] = new int[30];
int l = 0;
for (int k = 0; k < hand.Length; k++)
{
if (k == i || k == j) continue;
cards[l++] = hand[k];
}
var h = new hand(cards);
for (int k = 0; k < rem.Length; k++)
{
int score = CribbageHand.score(h, rem[k], false);
cntA[cnti][score]++;
}
}
return cntA;
}
public static int score(hand h, card turn, bool crib)
{
int score = 0;
h.cards.CopyTo(cA, 0);
cA[4] = turn;
Array.Sort<card>(cA, (x, y) => { if (x.face != y.face)
return x.face-y.face;
return x.suit-y.suit;
} );
for (int i = 0; i < h.Count; i++)
{
bool flush = (i == 0);
if (h[i].face == 11 && h[i].suit == turn.suit) score++; // his nibs
if (h[i].face == turn.face) score += 2; // pair
for (int j = i+1; j < h.Count; j++)
{
if (h[i].face == h[j].face)
score += 2; // pair
// flushes
if (flush && h[i].suit != h[j].suit)
flush = false;
}
if (flush)
if (h[i].suit == turn.suit)
score += 5;
else if (!crib)
score += 4;
}
// Straights - count the runs&repeats at the same time.
int last = cA[0].face;
int repeats = 1;
int combos = 1;
int run = 1;
for (int i = 1; i < cA.Length; i++)
{
if (cA[i].face == last)
{
repeats++;
}
else if (cA[i].face == last+1)
{
combos *= repeats;
repeats=1;
run++;
}
else if (run >= 3)
{
break;
}
else
{
repeats = 1;
combos = 1;
run = 1;
}
last = cA[i].face;
}
if (run >= 3)
score += run*combos;
// 15 counts - use the bits of an int to generate all the combos
for (int i = 1; i <= 0x1F; i++)
{
int sum = 0;
int tmp = i;
int j = 0;
while (tmp > 0)
{
if ((tmp & 0x1) == 0x1)
sum += cA[j].value;
tmp >>= 1;
j++;
}
if (sum == 15)
score += 2;
}
return score;
}