initial commit

internal/game/game.go

@@ -0,0 +1,81 @@
+package game
+
+type GameState int
+
+const (
+	StateWaiting GameState = iota
+	StatePlaying
+)
+
+type Game struct {
+	ID       string
+	Player1  *Player
+	Player2  *Player
+	Current  int // 1 or 2, whose turn it is
+	State    GameState
+	Deck     []Card
+	BookPile [][]Card
+}
+
+func NewGame(p1, p2 *Player) *Game {
+	deck := Shuffle(NewDeck())
+	return &Game{
+		ID:       "",
+		Player1:  p1,
+		Player2:  p2,
+		Current:  1,
+		State:    StatePlaying,
+		Deck:     deck,
+		BookPile: [][]Card{},
+	}
+}
+
+func (g *Game) DrawCard() Card {
+	if len(g.Deck) == 0 {
+		// Reshuffle book pile
+		var all []Card
+		for _, book := range g.BookPile {
+			all = append(all, book...)
+		}
+		if len(all) > 0 {
+			g.Deck = Shuffle(all)
+			g.BookPile = [][]Card{}
+		}
+	}
+	card := g.Deck[0]
+	g.Deck = g.Deck[1:]
+	return card
+}
+
+func (g *Game) Ask(target *Player, rank Rank) bool {
+	if !target.HasCard(rank) {
+		// Player draws from deck
+		card := g.DrawCard()
+		target.Draw(card)
+		return false // turn passes
+	}
+	// Target gives the card
+	removed := target.RemoveCard(rank)
+	if len(removed) > 0 {
+		// Add to asker's hand
+		g.Player1.Hand = append(g.Player1.Hand, removed...)
+		// Check for book
+		if g.Player1.HasBook(rank) {
+			// Find and remove the 4 cards from hand
+			var book []Card
+			var remaining []Card
+			count := 0
+			for _, c := range g.Player1.Hand {
+				if c.Rank == rank && count < 4 {
+					book = append(book, c)
+					count++
+				} else {
+					remaining = append(remaining, c)
+				}
+			}
+			g.Player1.Hand = remaining
+			g.BookPile = append(g.BookPile, book)
+		}
+	}
+	return true // same player continues
+}