Add bot to play against.

internal/game/game.go

@@ -3,6 +3,7 @@ package game
 import (
 	"crypto/rand"
 	"encoding/hex"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"math/big"
@@ -49,6 +50,13 @@ type Player struct {
 	// TripledThisRound records whether the player used the Triple (trade-in)
 	// action during the current round's shop (Bison's Battle Prep).
 	TripledThisRound bool `json:"tripledThisRound"`
+	// IsBot marks a computer-controlled seat. The engine treats bots exactly
+	// like humans; the server drives their actions. BotLevel is the bot's
+	// skill in [0, 1]; BotMemory is the bot's private notebook, opaque to the
+	// engine and persisted with the game so knowledge survives restarts.
+	IsBot     bool            `json:"isBot,omitempty"`
+	BotLevel  float64         `json:"botLevel,omitempty"`
+	BotMemory json.RawMessage `json:"botMemory,omitempty"`
 }
 
 // PetCount counts pet cards in the player's deck.
@@ -196,6 +204,19 @@ func (g *Game) AddPlayer(name string) (*Player, error) {
 	return p, nil
 }
 
+// AddBot seats a computer-controlled player. Bots count as connected from
+// the start; the server is responsible for driving their actions.
+func (g *Game) AddBot(name string, level float64) (*Player, error) {
+	p, err := g.AddPlayer(name)
+	if err != nil {
+		return nil, err
+	}
+	p.IsBot = true
+	p.BotLevel = min(max(level, 0), 1)
+	p.Connected = true
+	return p, nil
+}
+
 // PlayerByID returns the player, or nil.
 func (g *Game) PlayerByID(id string) *Player {
 	for _, p := range g.Players {
@@ -278,7 +299,8 @@ func (g *Game) Buy(playerID string, rowIdx int) error {
 	p.Coins--
 	bought := g.ShopRow[rowIdx]
 	p.Deck = append(p.Deck, bought)
-	g.logf(p.Seat, "🛒", "%s bought %s %s.", p.Name, article(bought.Name), bought.Name)
+	g.addLog(LogEntry{Seat: p.Seat, Icon: "🛒", Kind: LogBuy, Source: bought.ID, CardName: bought.Name,
+		Text: fmt.Sprintf("%s bought %s %s.", p.Name, article(bought.Name), bought.Name)})
 	g.ShopRow[rowIdx] = g.drawFromTier(g.Round)
 	g.applyShopTrigger(p, bought, TriggerBuy)
 	g.advanceShopTurn()
@@ -320,7 +342,7 @@ func (g *Game) applyShopTrigger(p *Player, c Card, trigger EffectTrigger) {
 			for range n {
 				p.Deck = append(p.Deck, g.newApple())
 			}
-			g.addLog(LogEntry{Seat: p.Seat, Icon: "🍎", Source: c.ID, Spawn: "apple",
+			g.addLog(LogEntry{Seat: p.Seat, Icon: "🍎", Source: c.ID, Spawn: "apple", Count: n,
 				Text: fmt.Sprintf("%s adds %d apple%s to %s's deck.", c.Name, n, plural(n), p.Name)})
 		case ActionRefreshGold:
 			p.Coins = min(p.Coins+e.count(), CoinsPerRound)
@@ -336,7 +358,7 @@ func (g *Game) applyShopTrigger(p *Player, c Card, trigger EffectTrigger) {
 				p.Deck = append(p.Deck, g.newApple())
 			}
 			if apples > 0 {
-				g.addLog(LogEntry{Seat: p.Seat, Icon: "🍎", Source: c.ID, Spawn: "apple",
+				g.addLog(LogEntry{Seat: p.Seat, Icon: "🍎", Source: c.ID, Spawn: "apple", Count: apples,
 					Text: fmt.Sprintf("%s doubles %s's apples (+%d).", c.Name, p.Name, apples)})
 			}
 		}
@@ -363,7 +385,7 @@ func (g *Game) sellCards(p *Player, cardIDs []string) error {
 	}
 	for _, c := range sold {
 		p.Deck = append(p.Deck, g.newApple())
-		g.addLog(LogEntry{Seat: p.Seat, Icon: "🍎", Source: c.ID, Spawn: "apple",
+		g.addLog(LogEntry{Seat: p.Seat, Icon: "🍎", Kind: LogSell, Source: c.ID, CardName: c.Name, Spawn: "apple",
 			Text: fmt.Sprintf("%s sold %s — it becomes an apple.", p.Name, c.Name)})
 		g.applyShopTrigger(p, c, TriggerSell)
 	}
@@ -427,11 +449,14 @@ func (g *Game) TradeStart(playerID string, cardIDs []string) error {
 	// The discarded trio is public — everyone sees what was given up — even
 	// though the pet ultimately chosen stays secret (see TradeChoose).
 	names := make([]string, len(traded))
+	ids := make([]string, len(traded))
 	for i, c := range traded {
 		names[i] = c.Name
+		ids[i] = c.ID
 	}
-	g.logf(p.Seat, "🔄", "%s traded in %s (%s) for a tier %d pick.",
-		p.Name, strings.Join(names, ", "), suit, nextTier)
+	g.addLog(LogEntry{Seat: p.Seat, Icon: "🔄", Kind: LogTrade, Cards: ids,
+		Text: fmt.Sprintf("%s traded in %s (%s) for a tier %d pick.",
+			p.Name, strings.Join(names, ", "), suit, nextTier)})
 	g.Pending = &PendingTrade{
 		PlayerID: playerID,
 		Tier:     nextTier,
@@ -463,10 +488,12 @@ func (g *Game) TradeChoose(playerID string, pick int) error {
 	// can't see the deck. But a pet with a Buy ability performs it publicly, so
 	// we have to reveal that pet (its effect log names it anyway).
 	if hasBuyEffect(chosen) {
-		g.logf(p.Seat, "🔄", "%s's trade pick is %s %s — its buy ability triggers.",
-			p.Name, article(chosen.Name), chosen.Name)
+		g.addLog(LogEntry{Seat: p.Seat, Icon: "🔄", Kind: LogTradePick, CardName: chosen.Name,
+			Text: fmt.Sprintf("%s's trade pick is %s %s — its buy ability triggers.",
+				p.Name, article(chosen.Name), chosen.Name)})
 	} else {
-		g.logf(p.Seat, "🔄", "%s keeps their trade pick hidden.", p.Name)
+		g.addLog(LogEntry{Seat: p.Seat, Icon: "🔄", Kind: LogTradePick,
+			Text: fmt.Sprintf("%s keeps their trade pick hidden.", p.Name)})
 	}
 	// Pets obtained via the Triple action trigger their Buy effects.
 	g.applyShopTrigger(p, chosen, TriggerBuy)