func (ht *HandTracker) populate(playerid int, hand sdz.Hand) {
for _, suit := range sdz.Suits() {
for _, face := range sdz.Faces() {
card := sdz.CreateCard(suit, face)
ht.cards[playerid][card] = 0
}
}
for _, card := range hand {
ht.cards[playerid][card]++
}
ht.calculate()
}
// Returns a new HandTracker with the initial population and calculation done
func NewHandTracker(playerid int, hand sdz.Hand) *HandTracker {
ht := new(HandTracker)
for x := 0; x < 4; x++ {
ht.cards[x] = make(map[sdz.Card]int)
}
ht.playedCards = make(map[sdz.Card]int)
for _, suit := range sdz.Suits() {
for _, face := range sdz.Faces() {
card := sdz.CreateCard(suit, face)
ht.playedCards[card] = 0
}
}
ht.populate(playerid, hand)
return ht
}
func (ai AI) calculateBid() (amount int, trump sdz.Suit, show sdz.Hand) {
bids := make(map[sdz.Suit]int)
for _, suit := range sdz.Suits() {
bids[suit], show = ai.hand.Meld(suit)
bids[suit] = bids[suit] + ai.powerBid(suit)
// Log("Could bid %d in %s", bids[suit], suit)
if bids[trump] < bids[suit] {
trump = suit
} else if bids[trump] == bids[suit] {
rand.Seed(time.Now().UnixNano())
if rand.Intn(2) == 0 { // returns one in the set of [0,2)
trump = suit
} // else - stay with trump as it was
}
}
rand.Seed(time.Now().UnixNano())
bids[trump] += rand.Intn(3) // adds 0, 1, or 2 for a little spontanaeity
return bids[trump], trump, show
}
func (ht *HandTracker) calculate() {
for _, suit := range sdz.Suits() {
for _, face := range sdz.Faces() {
card := sdz.CreateCard(suit, face)
sum := ht.playedCards[card]
for x := 0; x < 4; x++ {
if val, ok := ht.cards[x][card]; ok {
sum += val
}
}
if sum == 2 {
for x := 0; x < 4; x++ {
if _, ok := ht.cards[x][card]; !ok {
ht.cards[x][card] = 0
}
}
} else {
unknown := -1
for x := 0; x < 4; x++ {
if _, ok := ht.cards[x][card]; !ok {
if unknown == -1 {
unknown = x
} else {
// at least two unknowns
unknown = -1
break
}
}
}
if unknown != -1 {
ht.cards[unknown][card] = 2 - sum
}
}
}
}
}
func (ai AI) powerBid(suit sdz.Suit) (count int) {
count = 5 // your partner's good for at least this right?!?
suitMap := make(map[sdz.Suit]int)
for _, card := range *ai.hand {
suitMap[card.Suit()]++
if card.Suit() == suit {
switch card.Face() {
case ace:
count += 3
case ten:
count += 2
case king:
fallthrough
case queen:
fallthrough
case jack:
fallthrough
case nine:
count += 1
}
} else if card.Face() == ace {
count += 2
} else if card.Face() == jack || card.Face() == nine {
count -= 1
}
}
for _, x := range sdz.Suits() {
if x == suit {
continue
}
if suitMap[x] == 0 {
count++
}
}
return
}