1 files changed, 39 insertions, 0 deletions
diff --git a/internal/casino/roulette_wagers.go b/internal/casino/roulette_wagers.go
new file mode 100644
index 0000000..7562582
--- /dev/null
+++ b/internal/casino/roulette_wagers.go
@@ -0,0 +1,39 @@
+package casino
+
+import "fmt"
+
+// Roulette offers one wager per spin, but the target catalogue is the whole
+// layout, so the state-based list doubles as the payout reference: every
+// legal target with its profit odds and its chance (pockets out of an
+// equally-likely wheel). Racetrack call bets join on tables that offer them.
+func (t *rouletteTable) wagerRows() []WagerRow {
+	pockets, basketOdds, basketPockets := 37, "8:1", 4
+	if t.Config.Roulette.DoubleZero {
+		pockets, basketOdds, basketPockets = 38, "6:1", 5
+	}
+	chance := func(n int) string { return fmt.Sprintf("%d/%d", n, pockets) }
+	rows := []WagerRow{
+		{"<number>", "35:1", "One pocket (" + chance(1) + ")"},
+		{"red / black", "1:1", "The color (" + chance(18) + ")"},
+		{"odd / even", "1:1", "The parity (" + chance(18) + ")"},
+		{"low / high", "1:1", "Low 1-18 / high 19-36 (" + chance(18) + ")"},
+		{"1to12 / 13to24 / 25to36", "2:1", "A dozen (" + chance(12) + ")"},
+		{"row1 / row2 / row3", "2:1", "A numbered row (" + chance(12) + ")"},
+		{"split <a> <b>", "17:1", "Two touching pockets (" + chance(2) + ")"},
+		{"street <a> <b> <c>", "11:1", "Three numbers in a street (" + chance(3) + ")"},
+		{"trio 0 <a> <b>", "11:1", "A zero-edge trio (" + chance(3) + ")"},
+		{"corner <a> <b> <c> <d>", "8:1", "A 2x2 square (" + chance(4) + ")"},
+		{"line <a> … <f>", "5:1", "Two adjoining streets (" + chance(6) + ")"},
+		{"basket", basketOdds, "0, 1, 2, 3 (+ 00) (" + chance(basketPockets) + ")"},
+	}
+	if t.Config.Roulette.Racetrack && !t.Config.Roulette.DoubleZero {
+		rows = append(rows,
+			WagerRow{"voisins", "5:3 or 1:1", "17 pockets around zero, 9 chips"},
+			WagerRow{"tiers", "2:1", "The 12 pockets opposite zero, 6 chips"},
+			WagerRow{"orphelins", "31:5 or 13:5", "The two orphan arcs, 5 chips"},
+			WagerRow{"zero / jeu zero", "8:1 or 7:2", "The 7 pockets nearest zero, 4 chips"},
+			WagerRow{"neighbors <n>", "3:1", "Pocket n plus four numbers each side, 9 chips"},
+		)
+	}
+	return rows
+}