1 files changed, 190 insertions, 0 deletions
diff --git a/internal/game/casino_house_edge.go b/internal/game/casino_house_edge.go
new file mode 100644
index 0000000..8bc3a5b
--- /dev/null
+++ b/internal/game/casino_house_edge.go
@@ -0,0 +1,190 @@
+package game
+
+import (
+	"fmt"
+	"math"
+	"strings"
+	"unicode/utf8"
+
+	"thehouseoficarus/internal/casino"
+	"thehouseoficarus/internal/net"
+	"thehouseoficarus/internal/ui"
+)
+
+// Only carried, positive-quantity items count. The most precise instrument wins.
+func (g *Game) casinoEdgePrecision(sess *net.Session) (int, bool) {
+	if sess == nil || sess.Player == nil || g.ItemStore == nil {
+		return 0, false
+	}
+	precision, found := 0, false
+	for _, slot := range sess.Player.Inventory {
+		if slot == nil || slot.Quantity <= 0 {
+			continue
+		}
+		def, err := g.ItemStore.Load(slot.ItemID)
+		if err != nil || def.HouseEdgePrecision == nil {
+			continue
+		}
+		p := *def.HouseEdgePrecision
+		if p != 0 && p != 2 {
+			continue
+		}
+		precision = max(precision, p)
+		found = true
+	}
+	return precision, found
+}
+
+// Convert the unrounded loss, not the displayed/rounded house edge.
+func casinoRTP(e casino.HouseEdge, precision int) string {
+	if len(e.Parts) != 1 {
+		return "—"
+	}
+	value := math.Round((1-e.Parts[0].Loss)*100*math.Pow10(precision)) / math.Pow10(precision)
+	if value == 0 {
+		value = 0
+	} // no negative zero
+	return fmt.Sprintf("%.*f%%", precision, value)
+}
+
+type casinoListRow struct {
+	bet, odds, win string
+	edge           casino.HouseEdge
+}
+
+// Only remove redundant commission prose. Exceptions such as Banker 6 paying
+// half or three-card 7 pushing are rules, not redundant explanations.
+func conciseCasinoOdds(odds string) string {
+	if at := strings.Index(odds, " ("); at >= 0 && strings.HasSuffix(odds, "% commission)") {
+		return odds[:at]
+	}
+	return odds
+}
+
+func (g *Game) casinoListRows(sess *net.Session, t *casino.Table, wagers []casino.WagerRow) []casinoListRow {
+	_, enabled := g.casinoEdgePrecision(sess)
+	var rows []casinoListRow
+	for _, wager := range wagers {
+		row := casinoListRow{bet: wager.Bet, odds: conciseCasinoOdds(wager.Payout), win: wager.Win}
+		if enabled {
+			row.edge = t.HouseEdge(sess.Player.Name, wager.Bet)
+		}
+		if len(row.edge.Parts) <= 1 {
+			rows = append(rows, row)
+			continue
+		}
+		// Different target returns need distinct rows, not a list of unlabeled RTPs.
+		for _, part := range row.edge.Parts {
+			entry := row
+			if strings.Contains(wager.Bet, "<n>") {
+				entry.bet = strings.ReplaceAll(wager.Bet, "<n>", part.Label)
+			} else {
+				entry.win = part.Label + "; " + entry.win
+			}
+			entry.edge = casino.HouseEdge{Parts: []casino.EdgePart{part}}
+			rows = append(rows, entry)
+		}
+	}
+	return rows
+}
+
+// Explicit list-only presentation. Wrap plain cells before applying color and
+// handing them to the existing ANSI-aware table renderer; never truncate rules.
+// The table stands alone: list names no heading and no balance above it.
+func (g *Game) showCasinoListTable(sess *net.Session, hint string, rows []casinoListRow) {
+	precision, hasItem := g.casinoEdgePrecision(sess)
+	// The item adds a column only when at least one listed wager has a real
+	// analysis; decision actions such as hit/stand have none.
+	rtp := false
+	if hasItem {
+		for _, r := range rows {
+			if len(r.edge.Parts) > 0 {
+				rtp = true
+				break
+			}
+		}
+	}
+	headers := []string{"Bet", "Odds", "Win / action"}
+	categories := []string{"command", "casino_payout", ""}
+	if rtp {
+		headers = append(headers, "RTP")
+		categories = append(categories, "casino_emphasis")
+	}
+	cells := make([][]string, 0, len(rows))
+	widths := make([]int, len(headers))
+	for i, h := range headers {
+		widths[i] = utf8.RuneCountInString(h)
+	}
+	for _, r := range rows {
+		odds := r.odds
+		if odds == "" {
+			odds = "—"
+		}
+		row := []string{r.bet, odds, r.win}
+		if rtp {
+			row = append(row, casinoRTP(r.edge, precision))
+		}
+		for i, c := range row {
+			widths[i] = max(widths[i], utf8.RuneCountInString(c))
+		}
+		cells = append(cells, row)
+	}
+	width, unicode := 80, true
+	if p := sess.Player; p != nil {
+		unicode = p.OptionBool("unicode")
+		if wrap := p.OptionInt("wrap_width"); wrap > 0 {
+			width = min(width, wrap)
+		}
+	}
+	budget := max(len(headers), width-3*len(headers)-1)
+	for {
+		sum, widest := 0, 0
+		for i, w := range widths {
+			sum += w
+			if w > widths[widest] {
+				widest = i
+			}
+		}
+		if sum <= budget || widths[widest] <= 1 {
+			break
+		}
+		widths[widest]--
+	}
+	table := ui.Table{}
+	// Headers wrap too, so narrow terminals never lose a column label.
+	all := append([][]string{headers}, cells...)
+	for rowIndex, row := range all {
+		wrapped := make([][]string, len(row))
+		height := 1
+		for i, c := range row {
+			wrapped[i] = casinoWrapWords(c, widths[i])
+			height = max(height, len(wrapped[i]))
+		}
+		for line := 0; line < height; line++ {
+			physical := make([]string, len(row))
+			for i, parts := range wrapped {
+				if line >= len(parts) {
+					continue
+				}
+				category := categories[i]
+				if rowIndex == 0 {
+					category = "casino_action"
+				}
+				physical[i] = parts[line]
+				if category != "" {
+					physical[i] = g.colorize(sess, category, physical[i])
+				}
+			}
+			if rowIndex == 0 && line == 0 {
+				table.Columns = physical
+			} else {
+				table.Rows = append(table.Rows, physical)
+			}
+		}
+	}
+	out := table.Render(unicode, width)
+	if hint != "" {
+		out = append(out, g.colorize(sess, "command", hint))
+	}
+	sess.WriteLine(strings.Join(out, "\n"))
+}