补全赛马插件完整游戏逻辑

实现所有帮助文本中声明的命令和比赛结算流程：
- 赛马报名：解析马匹名、创建Horse对象、防重复报名、发放参赛奖励
- 赛马取消报名：移除马匹、退还相关下注
- 赛马下注：扣积分、记录下注、不能给自己的马下注
- 赛马赔率：基于下注分布动态计算赔率
- 赛马开赛：异步执行比赛、自动结算冠军奖励和下注赔付、保存结果

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

danding_bot/plugins/group_horse_racing/commands.py

@@ -1,3 +1,7 @@
+import asyncio
+import uuid
+from datetime import datetime
+
 from nonebot import on_command
 from nonebot.adapters.onebot.v11 import Bot, Event, GroupMessageEvent, PrivateMessageEvent
 
@@ -5,7 +9,7 @@ from .room_store import RoomStore
 from .points_service import PointsService
 from .race_engine import RaceEngine
 from .message_service import MessageService
-from .models import Room, Horse, Bet, HorseState
+from .models import Room, Horse, Bet, HorseState, RoomState, RaceResult
 
 # Import config from __init__ to ensure it's loaded through NoneBot driver
 from . import plugin_config as config
@@ -40,6 +44,120 @@ async def check_access(bot: Bot, event: Event) -> bool:
     return False
 
 
+def get_event_id(event: Event) -> str:
+    """Get user id as string from event."""
+    return str(event.user_id)
+
+
+def calculate_odds(room: Room) -> dict[str, float]:
+    """Calculate odds for each horse based on bet distribution."""
+    total_bet = sum(b.amount for b in room.bets)
+    odds = {}
+    for name in room.horses:
+        horse_bet = sum(b.amount for b in room.bets if b.horse_name == name)
+        if horse_bet == 0:
+            odds[name] = config.MIN_ODDS
+        else:
+            raw_odds = total_bet / horse_bet
+            odds[name] = max(config.MIN_ODDS, round(raw_odds, 2))
+    return odds
+
+
+async def settle_race(room: Room):
+    """Settle bets and rewards after race finishes."""
+    champion = room.horses.get(room.champion_name)
+    if not champion:
+        return
+
+    # Reward champion owner
+    await points_service.reward_champion(champion.owner_id)
+
+    # Reward all participants
+    for horse in room.horses.values():
+        if horse.owner_id != champion.owner_id:
+            await points_service.reward_participant(horse.owner_id)
+
+    # Settle bets
+    odds = calculate_odds(room)
+    for bet in room.bets:
+        if bet.horse_name == room.champion_name:
+            await points_service.payout_winnings(bet.user_id, bet.amount, odds.get(bet.horse_name, config.MIN_ODDS))
+
+    # Save race result
+    result = RaceResult(
+        race_id=str(uuid.uuid4()),
+        scope=room.scope,
+        champion_name=champion.name,
+        champion_owner=champion.owner_id,
+        participants=[h.name for h in room.horses.values()],
+        bet_distribution={name: sum(b.amount for b in room.bets if b.horse_name == name) for name in room.horses},
+        duration_ticks=room.tick_count,
+        completed_at=datetime.now(),
+    )
+    room_store.save_race_result(result)
+
+
+async def run_race_with_settlement(bot: Bot, room: Room, scope: str):
+    """Run race and handle settlement + cleanup."""
+    task = await race_engine.start_race(room)
+
+    # Send start message
+    horse_list = "\n".join(f"  {h.name} (主人: {h.owner_id})" for h in room.horses.values())
+    try:
+        await bot.send_msg(
+            message_type="group" if scope.startswith("group_") else "private",
+            group_id=int(scope.split("_", 1)[1]) if scope.startswith("group_") else None,
+            user_id=int(scope.split("_", 1)[1]) if scope.startswith("test_") else None,
+            message=f"比赛开始！参赛马匹：\n{horse_list}",
+        )
+    except Exception:
+        pass
+
+    # Wait for race to finish
+    try:
+        await task
+    except asyncio.CancelledError:
+        room.state = RoomState.INTERRUPTED
+        # Refund all bets on interruption
+        for bet in room.bets:
+            await points_service.refund_bet_points(bet.user_id, bet.amount, "比赛中断退还")
+        return
+
+    # Race finished - settle
+    await settle_race(room)
+
+    # Build result message
+    odds = calculate_odds(room)
+    champion = room.horses.get(room.champion_name)
+    result_lines = [
+        f"比赛结束！冠军：{room.champion_name} 🏆",
+        f"马主 {champion.owner_id if champion else '?'} 获得 {config.CHAMPION_REWARD} 积分",
+    ]
+    winning_bets = [b for b in room.bets if b.horse_name == room.champion_name]
+    if winning_bets:
+        result_lines.append("下注中奖：")
+        for b in winning_bets:
+            payout = int(b.amount * odds.get(b.horse_name, config.MIN_ODDS))
+            result_lines.append(f"  {b.user_id} 下注 {b.amount} → 获得 {payout}")
+
+    try:
+        await bot.send_msg(
+            message_type="group" if scope.startswith("group_") else "private",
+            group_id=int(scope.split("_", 1)[1]) if scope.startswith("group_") else None,
+            user_id=int(scope.split("_", 1)[1]) if scope.startswith("test_") else None,
+            message="\n".join(result_lines),
+        )
+    except Exception:
+        pass
+
+    # Cleanup
+    race_engine.stop_race(scope)
+    room_store.delete_room(scope)
+    message_service.clear_pending_recalls(scope)
+
+
+# --- Commands ---
+
 register_cmd = on_command("赛马报名", priority=5)
 
 
@@ -50,7 +168,21 @@ async def handle_register(bot: Bot, event: Event):
         await register_cmd.finish("无权限访问此功能")
         return
 
+    # Parse horse name from message
+    msg = str(event.get_message()).strip()
+    parts = msg.split(None, 1)
+    horse_name = parts[1].strip() if len(parts) > 1 else ""
+
+    if not horse_name:
+        await register_cmd.finish("请输入马匹名：/赛马报名 <马匹名>")
+        return
+
+    if len(horse_name) > 10:
+        await register_cmd.finish("马匹名不能超过10个字符")
+        return
+
     scope = get_scope(event)
+    user_id = get_event_id(event)
     lock = room_store.get_lock(scope)
 
     async with lock:
@@ -58,11 +190,174 @@ async def handle_register(bot: Bot, event: Event):
         if not room:
             room = room_store.create_room(scope)
 
-        if len(room.horses) >= 8:
-            await register_cmd.finish("房间已满")
+        if room.state != RoomState.WAITING:
+            await register_cmd.finish("比赛正在进行中，无法报名")
             return
 
-        await register_cmd.finish("报名成功")
+        if len(room.horses) >= 8:
+            await register_cmd.finish("房间已满（最多8匹马）")
+            return
+
+        if horse_name in room.horses:
+            await register_cmd.finish(f"马匹名 \"{horse_name}\" 已被使用")
+            return
+
+        # Check if user already registered
+        for h in room.horses.values():
+            if h.owner_id == user_id:
+                await register_cmd.finish("你已经报名了，不能重复报名")
+                return
+
+        # Create horse
+        room.horses[horse_name] = Horse(owner_id=user_id, name=horse_name)
+
+    # Reward participant (outside lock to avoid holding lock during API call)
+    await points_service.reward_participant(user_id)
+
+    count = len(room.horses)
+    await register_cmd.finish(f"报名成功！马匹 \"{horse_name}\" 已加入比赛（{count}/8）")
+
+
+cancel_cmd = on_command("赛马取消报名", priority=5)
+
+
+@cancel_cmd.handle()
+async def handle_cancel(bot: Bot, event: Event):
+    """Handle cancel registration."""
+    if not await check_access(bot, event):
+        await cancel_cmd.finish("无权限访问此功能")
+        return
+
+    scope = get_scope(event)
+    user_id = get_event_id(event)
+    lock = room_store.get_lock(scope)
+
+    async with lock:
+        room = room_store.get_room(scope)
+        if not room:
+            await cancel_cmd.finish("房间不存在")
+            return
+
+        if room.state != RoomState.WAITING:
+            await cancel_cmd.finish("比赛正在进行中，无法取消报名")
+            return
+
+        # Find user's horse
+        user_horse = None
+        for name, horse in room.horses.items():
+            if horse.owner_id == user_id:
+                user_horse = name
+                break
+
+        if not user_horse:
+            await cancel_cmd.finish("你还没有报名")
+            return
+
+        # Refund bets on this horse
+        bets_to_refund = [b for b in room.bets if b.horse_name == user_horse]
+        for bet in bets_to_refund:
+            await points_service.refund_bet_points(bet.user_id, bet.amount, "取消报名退还下注")
+        room.bets = [b for b in room.bets if b.horse_name != user_horse]
+
+        # Remove horse
+        del room.horses[user_horse]
+
+    await cancel_cmd.finish(f"已取消报名，马匹 \"{user_horse}\" 已退出")
+
+
+bet_cmd = on_command("赛马下注", priority=5)
+
+
+@bet_cmd.handle()
+async def handle_bet(bot: Bot, event: Event):
+    """Handle bet placement."""
+    if not await check_access(bot, event):
+        await bet_cmd.finish("无权限访问此功能")
+        return
+
+    # Parse arguments: /赛马下注 <马匹名> <金额>
+    msg = str(event.get_message()).strip()
+    parts = msg.split()
+    if len(parts) < 3:
+        await bet_cmd.finish("请使用：/赛马下注 <马匹名> <金额>")
+        return
+
+    horse_name = parts[1]
+    try:
+        amount = int(parts[2])
+    except ValueError:
+        await bet_cmd.finish("金额必须是正整数")
+        return
+
+    if amount < config.MIN_BET:
+        await bet_cmd.finish(f"最低下注金额为 {config.MIN_BET}")
+        return
+
+    scope = get_scope(event)
+    user_id = get_event_id(event)
+    lock = room_store.get_lock(scope)
+
+    async with lock:
+        room = room_store.get_room(scope)
+        if not room:
+            await bet_cmd.finish("房间不存在，请先报名")
+            return
+
+        if room.state != RoomState.WAITING:
+            await bet_cmd.finish("比赛正在进行中，无法下注")
+            return
+
+        if horse_name not in room.horses:
+            await bet_cmd.finish(f"马匹 \"{horse_name}\" 不存在")
+            return
+
+        # Can't bet on your own horse
+        if room.horses[horse_name].owner_id == user_id:
+            await bet_cmd.finish("不能给自己的马下注")
+            return
+
+        # Deduct points first
+        success, balance = await points_service.spend_bet_points(user_id, amount, f"下注 {horse_name}")
+        if not success:
+            await bet_cmd.finish(f"积分不足（当前余额：{balance}）")
+            return
+
+        # Record bet
+        room.bets.append(Bet(user_id=user_id, horse_name=horse_name, amount=amount))
+
+    odds = calculate_odds(room)
+    await bet_cmd.finish(f"下注成功！{horse_name} {amount}积分（当前赔率：{odds.get(horse_name, config.MIN_ODDS):.2f}）")
+
+
+odds_cmd = on_command("赛马赔率", priority=5)
+
+
+@odds_cmd.handle()
+async def handle_odds(bot: Bot, event: Event):
+    """Handle odds display."""
+    if not await check_access(bot, event):
+        await odds_cmd.finish("无权限访问此功能")
+        return
+
+    scope = get_scope(event)
+    room = room_store.get_room(scope)
+    if not room:
+        await odds_cmd.finish("房间不存在，请先报名")
+        return
+
+    if not room.horses:
+        await odds_cmd.finish("还没有马匹报名")
+        return
+
+    odds = calculate_odds(room)
+    lines = ["当前赔率："]
+    total_bet = sum(b.amount for b in room.bets)
+    for name, odd in odds.items():
+        horse_bet = sum(b.amount for b in room.bets if b.horse_name == name)
+        lines.append(f"  {name} - {odd:.2f}倍 (总下注: {horse_bet})")
+    lines.append(f"总下注池: {total_bet}")
+
+    await odds_cmd.finish("\n".join(lines))
 
 
 start_cmd = on_command("赛马开赛", priority=5)
@@ -81,15 +376,25 @@ async def handle_start(bot: Bot, event: Event):
     async with lock:
         room = room_store.get_room(scope)
         if not room:
-            await start_cmd.finish("房间不存在")
+            await start_cmd.finish("房间不存在，请先报名")
+            return
+
+        if room.state != RoomState.WAITING:
+            await start_cmd.finish("比赛已经在进行中")
             return
 
         if len(room.horses) < 2:
             await start_cmd.finish("至少需要2匹马才能开赛")
             return
 
-        await race_engine.start_race(room)
-        await start_cmd.finish("比赛开始！")
+        # Set all horses to racing state
+        for horse in room.horses.values():
+            horse.state = HorseState.RACING
+
+    await start_cmd.finish("比赛开始！")
+
+    # Run race in background (outside command handler)
+    asyncio.create_task(run_race_with_settlement(bot, room, scope))
 
 
 help_cmd = on_command("赛马帮助", priority=5)
@@ -98,13 +403,11 @@ help_cmd = on_command("赛马帮助", priority=5)
 @help_cmd.handle()
 async def handle_help(bot: Bot, event: Event):
     """Handle help command."""
-    help_text = """
-赛马命令帮助：
-/赛马报名 <马匹名> - 报名参赛
-/赛马取消报名 - 取消报名
-/赛马下注 <马匹名> <金额> - 下注
-/赛马开赛 - 开始比赛
-/赛马赔率 - 查看赔率
-/赛马帮助 - 显示此帮助
-    """
+    help_text = """赛马命令帮助：
+/赛马报名 <马匹名> - 报名参赛（获得50积分奖励）
+/赛马取消报名 - 取消报名并退还下注
+/赛马下注 <马匹名> <金额> - 下注（不能给自己的马下注）
+/赛马赔率 - 查看当前赔率
+/赛马开赛 - 开始比赛（至少2匹马）
+/赛马帮助 - 显示此帮助"""
     await help_cmd.finish(help_text)