import asyncio
import logging
import uuid
from datetime import datetime

from nonebot import on_command
from nonebot.adapters.onebot.v11 import Bot, Event, GroupMessageEvent, Message, MessageSegment, PrivateMessageEvent

from danding_bot.plugins.danding_qqpush.config import Config as QqPushConfig
from danding_bot.plugins.danding_qqpush.image_render import ImageRenderer
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, RoomState, RaceResult

# Import config from __init__ to ensure it's loaded through NoneBot driver
from . import plugin_config as config

logger = logging.getLogger("horse_racing.commands")

room_store = RoomStore(config)
points_service = PointsService(config)
race_engine = RaceEngine(config)
message_service = MessageService(config)
_race_image_renderer: ImageRenderer | None = None


async def _get_user_name(bot: Bot, scope: str, user_id: str) -> str:
    """Get user display name (group card > nickname > user_id)."""
    try:
        if scope.startswith("group_"):
            group_id = int(scope.split("_", 1)[1])
            info = await bot.get_group_member_info(group_id=group_id, user_id=int(user_id))
            return info.get("card") or info.get("nickname") or user_id
    except Exception:
        pass
    return user_id


async def _build_name_map(bot: Bot, scope: str, user_ids: list[str]) -> dict[str, str]:
    """Build a mapping from user_id to display name."""
    name_map: dict[str, str] = {}
    for uid in user_ids:
        if uid not in name_map:
            name_map[uid] = await _get_user_name(bot, scope, uid)
    return name_map


def _get_race_image_renderer() -> ImageRenderer:
    global _race_image_renderer
    if _race_image_renderer is None:
        qqpush_config = QqPushConfig()
        _race_image_renderer = ImageRenderer(
            width=config.RACE_IMAGE_WIDTH,
            font_size=config.RACE_IMAGE_FONT_SIZE,
            padding=config.RACE_IMAGE_PADDING,
            line_spacing=config.RACE_IMAGE_LINE_SPACING,
            font_paths=qqpush_config.FontPaths,
        )
    return _race_image_renderer


def _build_race_image_message(message: str) -> Message:
    if message.startswith("比赛开始！"):
        title = "🏇 赛马开赛"
        body = message.replace("比赛开始！", "发令枪响，比赛正式开始！", 1)
    elif message.startswith("比赛结束！"):
        title = "🏆 赛马结果"
        body = message
    else:
        title = "📣 赛马进度"
        body = f"🏁 实时播报\n{message}"

    renderer = _get_race_image_renderer()
    image_base64 = renderer.render_to_base64(body, title=title)
    message_obj = Message()
    message_obj.append(MessageSegment.image(image_base64))
    return message_obj


def get_scope(event: Event) -> str:
    """Get room scope from event."""
    if isinstance(event, GroupMessageEvent):
        return f"group_{event.group_id}"
    elif isinstance(event, PrivateMessageEvent):
        return f"test_{event.user_id}"
    return ""


async def check_access(bot: Bot, event: Event) -> bool:
    """Check if user has access to horse racing."""
    if isinstance(event, PrivateMessageEvent):
        if not config.TEST_MODE:
            return False
        return event.user_id in config.TESTERS

    if isinstance(event, GroupMessageEvent):
        if config.TEST_MODE:
            return event.group_id in config.TEST_GROUPS
        return event.group_id in config.ALLOWED_GROUPS

    return False


def get_event_id(event: Event) -> str:
    """Get user id as string from event."""
    return str(event.user_id)


def _normalize_horse_name(horse_name: str) -> str:
    return horse_name.strip().casefold()


def _get_horses_in_order(room: Room) -> list[Horse]:
    return sorted(room.horses.values(), key=lambda horse: horse.index)


def _format_horse_label(horse: Horse) -> str:
    return f"{horse.index:02d}号 {horse.name}"


def _find_user_horse(room: Room, user_id: str) -> Horse | None:
    for horse in _get_horses_in_order(room):
        if horse.owner_id == user_id:
            return horse
    return None


def _find_duplicate_horse(room: Room, horse_name: str) -> Horse | None:
    normalized_name = _normalize_horse_name(horse_name)
    for horse in room.horses.values():
        if _normalize_horse_name(horse.name) == normalized_name:
            return horse
    return None


def _resolve_horse_selector(room: Room, selector: str) -> Horse | None:
    selector = selector.strip()
    if selector.isdigit():
        target_index = int(selector)
        for horse in room.horses.values():
            if horse.index == target_index:
                return horse
        return None

    normalized_selector = _normalize_horse_name(selector)
    for horse in room.horses.values():
        if _normalize_horse_name(horse.name) == normalized_selector:
            return horse
    return None


def _describe_points_delta(delta: int) -> str:
    if delta >= 300:
        return "血赚翻倍"
    if delta >= 150:
        return "大赚特赚"
    if delta > 0:
        return "小有收获"
    if delta == 0:
        return "稳住不亏"
    if delta <= -300:
        return "倾家荡产"
    if delta <= -150:
        return "伤筋动骨"
    return "略有损失"


def _build_point_changes(room: Room, odds: dict[str, float]) -> tuple[dict[str, int], dict[str, str]]:
    point_changes: dict[str, int] = {}

    # Participation reward for all horse owners
    for horse in room.horses.values():
        point_changes[horse.owner_id] = point_changes.get(horse.owner_id, 0) + config.PARTICIPANT_REWARD

    for bet in room.bets:
        point_changes[bet.user_id] = point_changes.get(bet.user_id, 0) - bet.amount

    champion = room.horses.get(room.champion_name)
    if champion:
        point_changes[champion.owner_id] = point_changes.get(champion.owner_id, 0) + config.CHAMPION_REWARD

    for bet in room.bets:
        if bet.horse_name == room.champion_name:
            payout = int(bet.amount * odds.get(bet.horse_name, config.MIN_ODDS))
            point_changes[bet.user_id] = point_changes.get(bet.user_id, 0) + payout

    point_summaries = {
        user_id: _describe_points_delta(delta)
        for user_id, delta in point_changes.items()
    }
    return point_changes, point_summaries


async def _format_point_change_lines(room: Room, point_changes: dict[str, int], point_summaries: dict[str, str], name_map: dict[str, str]) -> list[str]:
    ordered_user_ids: list[str] = []
    for horse in _get_horses_in_order(room):
        if horse.owner_id not in ordered_user_ids:
            ordered_user_ids.append(horse.owner_id)
    for bet in room.bets:
        if bet.user_id not in ordered_user_ids:
            ordered_user_ids.append(bet.user_id)

    lines = ["积分变化："]
    for user_id in ordered_user_ids:
        delta = point_changes.get(user_id, 0)
        summary = point_summaries.get(user_id, _describe_points_delta(delta))
        display_name = name_map.get(user_id, user_id)
        balance = await points_service.get_balance(user_id)
        lines.append(f"  {display_name} {delta:+d} 积分 · {summary}（余额: {balance}）")
    return lines


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) -> tuple[RaceResult, dict[str, float]] | None:
    """Settle bets and rewards after race finishes. Returns (result, odds) or None."""
    champion = room.horses.get(room.champion_name)
    if not champion:
        return None

    # 1. Collect all user IDs involved
    user_ids = set()
    for horse in room.horses.values():
        user_ids.add(horse.owner_id)
    for horse in room.horses.values():
        for bet in horse.bets:
            user_ids.add(bet.user_id)
    
    # 2. Take balance snapshot BEFORE settlements
    pre_balances = {}
    for uid in user_ids:
        balance = await points_service.get_balance(uid)
        pre_balances[uid] = balance if balance is not None else 0

    # 3. Execute all reward/payout operations
    participant_points = config.PARTICIPANT_REWARD
    for horse in room.horses.values():
        ret, code = await points_service.reward_participant(horse.owner_id, participant_points)
        if not ret and code != POINTS_ERR_CODE_DUPLICATE:
            logger.warning(f"reward_participant failed for {horse.owner_id}: code={code}")

    champion_points = config.CHAMPION_REWARD
    ret, code = await points_service.reward_champion(champion.owner_id, champion_points)
    if not ret and code != POINTS_ERR_CODE_DUPLICATE:
        logger.warning(f"reward_champion failed for {champion.owner_id}: code={code}")

    all_bets = []
    for horse_name, horse in room.horses.items():
        all_bets.extend(horse.bets)

    total_bet = sum(bet.amount for bet in all_bets)
    if total_bet == 0:
        odds = {}
    else:
        odds = {}
        for horse_name, horse in room.horses.items():
            horse_bet = sum(bet.amount for bet in horse.bets)
            if horse_bet == 0:
                odds[horse_name] = config.MAX_ODDS
            else:
                odds[horse_name] = max(config.MIN_ODDS, total_bet / horse_bet)

    champion_bets = room.horses[room.champion_name].bets
    for bet in champion_bets:
        win_amount = int(bet.amount * odds[room.champion_name])
        ret, code = await points_service.payout_winnings(bet.user_id, win_amount)
        if not ret and code != POINTS_ERR_CODE_DUPLICATE:
            logger.warning(f"payout_winnings failed for {bet.user_id}: code={code}")

    # 4. Take post-settlement snapshot and compute actual deltas
    post_balances = {}
    for uid in user_ids:
        balance = await points_service.get_balance(uid)
        post_balances[uid] = balance if balance is not None else 0
    
    point_changes = {}
    for uid in user_ids:
        delta = post_balances[uid] - pre_balances[uid]
        if delta != 0:
            point_changes[uid] = delta

    result = RaceResult(
        champion_name=room.champion_name,
        finishing_order=[name for name in room.finishing_order if name in room.horses],
        point_changes=point_changes  # actual deltas
    )
    return result, odds

async def _send_to_scope(bot: Bot, scope: str, message: str, message_type: str = "race_update", critical: bool = False):
    """Send message to group or private chat based on scope.
    
    Args:
        critical: If True, retry once on failure, then fallback to plain text.
    """
    outbound_message: str | Message = message
    if config.RACE_RENDER_AS_IMAGE:
        try:
            outbound_message = _build_race_image_message(message)
        except Exception as e:
            logger.warning(f"_build_race_image_message failed, using plain text: {e}")
            outbound_message = message

    try:
        await message_service.send_with_recall(bot, scope, message_type, outbound_message)
    except Exception as e:
        if critical:
            logger.warning(f"_send_to_scope failed (critical={critical}) for {scope} [{message_type}]: {e}, retrying...")
            try:
                # Retry once with plain text
                await message_service.send_with_recall(bot, scope, message_type, message)
            except Exception as e2:
                logger.error(f"_send_to_scope retry also failed for {scope} [{message_type}]: {e2}")
        else:
            logger.warning(f"_send_to_scope failed for {scope} [{message_type}]: {e}")


async def run_race_with_settlement(bot: Bot, room: Room, scope: str):
    """Run race with live progress updates and settlement."""
    room.state = RoomState.RUNNING

    horse_list = "\n".join(f"  {_format_horse_label(h)}" for h in _get_horses_in_order(room))
    await _send_to_scope(bot, scope, f"比赛开始！\n{horse_list}", "race_update")

    # Race loop with progress updates
    try:
        while room.state == RoomState.RUNNING:
            await asyncio.sleep(config.RACE_TICK_INTERVAL)

            finished = race_engine.tick(room)
            progress = race_engine.format_progress(room)
            await _send_to_scope(bot, scope, progress, "race_update")

            if finished:
                champion = race_engine.determine_champion(finished)
                room.champion_name = champion.name
                room.state = RoomState.FINISHED
                break
    except asyncio.CancelledError:
        room.state = RoomState.INTERRUPTED
        for bet in room.bets:
            await points_service.refund_bet_points(bet.user_id, bet.amount, "比赛中断退还")
        return

    # Settle (returns (result, odds) or None)
    settlement = await settle_race(room)
    result = settlement[0] if settlement else None
    odds = settlement[1] if settlement else {}

    # Build user_id -> display name mapping
    all_user_ids = [h.owner_id for h in room.horses.values()] + [b.user_id for b in room.bets]
    name_map = await _build_name_map(bot, scope, all_user_ids)

    champion = room.horses.get(room.champion_name)
    champion_name_display = name_map.get(champion.owner_id, champion.owner_id) if champion else '?'
    result_lines = [
        f"比赛结束！冠军：{_format_horse_label(champion) if champion else room.champion_name}",
        f"马主 {champion_name_display} 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))
            bettor_name = name_map.get(b.user_id, b.user_id)
            result_lines.append(f"  {bettor_name} 下注 {b.amount} -> 获得 {payout}")
    if result:
        result_lines.extend(await _format_point_change_lines(room, result.point_changes, result.point_change_summaries, name_map))

    # Before sending result, we can recall the last update
    await message_service.recall_previous_of_type(bot, scope, "race_update")
    await _send_to_scope(bot, scope, "\n".join(result_lines), "race_result")

    # 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)


@register_cmd.handle()
async def handle_register(bot: Bot, event: Event):
    """Handle horse registration."""
    if not await check_access(bot, event):
        await register_cmd.finish("无权限访问此功能")
        return

    msg = str(event.get_message()).strip()
    parts = msg.split(None, 1)
    user_id = get_event_id(event)
    horse_name = _normalize_horse_name(parts[1]) if len(parts) > 1 else await room_store.get_last_horse_name(user_id) or ""

    if not horse_name:
        scope = get_scope(event)
        horse_name = await _get_user_name(bot, scope, user_id)
        # Ensure name is not too long when using nickname as default
        if len(horse_name) > 10:
            horse_name = horse_name[:10]

    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)
    lock = room_store.get_lock(scope)

    async with lock:
        room = room_store.get_room(scope)
        if not room:
            room = await room_store.create_room(scope)

        if room.state != RoomState.WAITING:
            await register_cmd.finish("比赛正在进行中，无法报名")
            return

        if len(room.horses) >= 8:
            await register_cmd.finish("房间已满（最多8匹马）")
            return

        duplicate_horse = _find_duplicate_horse(room, horse_name)
        if duplicate_horse:
            await register_cmd.finish(f"马匹名 \"{horse_name}\" 已被 {_format_horse_label(duplicate_horse)} 使用")
            return

        existing_user_horse = _find_user_horse(room, user_id)
        if existing_user_horse:
            await register_cmd.finish(f"你已经报名了，当前马匹为 {_format_horse_label(existing_user_horse)}")
            return

        horse_index = room.next_horse_index
        room.next_horse_index += 1
        room.horses[horse_name] = Horse(owner_id=user_id, name=horse_name, index=horse_index)
        await room_store.set_last_horse_name(user_id, horse_name)

    count = len(room.horses)
    registered_horse = room.horses[horse_name]
    await register_cmd.finish(f"报名成功！{_format_horse_label(registered_horse)} 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

        user_horse = _find_user_horse(room, user_id)
        if not user_horse:
            await cancel_cmd.finish("你还没有报名")
            return

        bets_to_refund = [b for b in room.bets if b.horse_name == user_horse.name]
        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.name]

        del room.horses[user_horse.name]

    await cancel_cmd.finish(f"已取消报名，{_format_horse_label(user_horse)} 已退出")


bet_cmd = on_command("赛马下注", priority=5)


cancel_bet_cmd = on_command("赛马取消下注", priority=5)


@cancel_bet_cmd.handle()
async def handle_cancel_bet(bot: Bot, event: Event):
    """Handle cancel bet - refund all bets placed by the user in current room."""
    if not await check_access(bot, event):
        await cancel_bet_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_bet_cmd.finish("房间不存在")
            return

        if room.state != RoomState.WAITING:
            await cancel_bet_cmd.finish("比赛已开始，无法取消下注")
            return

        user_bets = [b for b in room.bets if b.user_id == user_id]
        if not user_bets:
            await cancel_bet_cmd.finish("你还没有下注")
            return

        total_refund = 0
        refund_errors = []
        for bet in user_bets:
            try:
                await points_service.refund_bet_points(bet.user_id, bet.amount, "取消下注退还")
                total_refund += bet.amount
            except Exception as e:
                logger.error(f"退还下注失败 user={bet.user_id} amount={bet.amount}: {e}")
                refund_errors.append(bet)

        # 只移除已成功退还的下注
        if refund_errors:
            failed_amount = sum(b.amount for b in refund_errors)
            room.bets = [b for b in room.bets if b.user_id != user_id or b in refund_errors]
            await cancel_bet_cmd.finish(f"退还部分失败：成功退还 {total_refund} 积分，{len(refund_errors)} 笔退还失败（{failed_amount} 积分），请联系管理员")
            return
        else:
            room.bets = [b for b in room.bets if b.user_id != user_id]

    await cancel_bet_cmd.finish(f"已取消 {len(user_bets)} 笔下注，退还 {total_refund} 积分")


@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

    msg = str(event.get_message()).strip()
    parts = msg.split()
    if len(parts) < 3:
        await bet_cmd.finish("请使用：/赛马下注 <序号|马匹名> <金额>")
        return

    horse_selector = 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

        horse = _resolve_horse_selector(room, horse_selector)
        if not horse:
            await bet_cmd.finish(f"马匹序号/名称 \"{horse_selector}\" 不存在")
            return

        success, balance = await points_service.spend_bet_points(user_id, amount, f"下注 {_format_horse_label(horse)}")
        if not success:
            await bet_cmd.finish(f"积分不足（当前余额：{balance}）")
            return

        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！{_format_horse_label(horse)} {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 horse in _get_horses_in_order(room):
        odd = odds.get(horse.name, config.MIN_ODDS)
        horse_bet = sum(b.amount for b in room.bets if b.horse_name == horse.name)
        lines.append(f"  {_format_horse_label(horse)} - {odd:.2f}倍 (总下注: {horse_bet})")
    lines.append(f"总下注池: {total_bet}")

    await odds_cmd.finish("\n".join(lines))


race_list_cmd = on_command("赛马列表", priority=5)


@race_list_cmd.handle()
async def handle_race_list(bot: Bot, event: Event):
    """显示当前房间所有报名马匹信息。"""
    if not await check_access(bot, event):
        await race_list_cmd.finish("无权限访问此功能")
        return

    scope = get_scope(event)
    room = room_store.get_room(scope)
    if not room or not room.horses:
        await race_list_cmd.finish("暂无报名马匹")
        return

    lines = ["🏇 当前报名马匹："]
    for horse in _get_horses_in_order(room):
        owner_display = await _get_user_name(bot, scope, horse.owner_id)
        lines.append(f"  {horse.index}. {horse.name} - 主人: {owner_display}")
    lines.append(f"\n共 {len(room.horses)} 匹马")

    await race_list_cmd.finish("\n".join(lines))


start_cmd = on_command("赛马开赛", priority=5)


@start_cmd.handle()
async def handle_start(bot: Bot, event: Event):
    """Handle race start - only participants or admins can start."""
    if not await check_access(bot, event):
        await start_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 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

        # 开赛权限限制：仅参赛者或群管理员可手动开赛（满8匹自动开赛不受影响）
        is_participant = user_id in [h.owner_id for h in room.horses.values()]
        is_admin = False
        if isinstance(event, GroupMessageEvent):
            try:
                member_info = await bot.get_group_member_info(
                    group_id=event.group_id, 
                    user_id=int(user_id)
                )
                role = member_info.get("role", "")
                is_admin = role in ("admin", "owner")
            except Exception:
                pass
        
        if not is_participant and not is_admin:
            await start_cmd.finish("只有参赛者或群管理员可以开赛")
            return

        # Set all horses to racing state
        for horse in room.horses.values():
            horse.state = HorseState.RACING

    await start_cmd.send("比赛开始！")

    # Run race in background (outside command handler)
    task = asyncio.create_task(run_race_with_settlement(bot, room, scope))
    race_engine.register_task(scope, task)


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 = f"""🏇 赛马游戏帮助

📌 命令列表：
/赛马报名 <马匹名> - 报名参赛（最多8匹马）
/赛马报名 - 复用上次绑定的马名，若无则使用群昵称
/赛马取消报名 - 取消报名并退还下注
/赛马下注 <序号|马匹名> <金额> - 下注
/赛马取消下注 - 取消本人在当前房间的所有下注并退还积分
/赛马赔率 - 查看当前赔率和下注池
/赛马列表 - 查看当前报名马匹列表
/赛马开赛 - 开始比赛（至少2匹马）
/赛马帮助 - 显示此帮助

📏 规则说明：
• 最低下注金额：{config.MIN_BET} 积分
• 参赛马匹上限：8匹
• 开赛要求：至少2匹马报名
• 手动开赛权限：仅当前参赛者或群管理员可操作

💰 奖励机制：
• 参赛奖励：参赛者均可获得 {config.PARTICIPANT_REWARD} 积分
• 冠军马主：获得 {config.CHAMPION_REWARD} 积分
• 下注中奖：下注金额 × 赔率

📊 赔率说明：
• 赔率根据各马匹下注总额动态计算
• 下注越少的马，赔率越高
• 最低赔率：{config.MIN_ODDS} 倍

🎮 游戏流程：
1️⃣ 玩家报名并绑定马匹名
2️⃣ 玩家可以给任意马匹下注
3️⃣ 满足开赛后，由参赛者或管理员开赛
4️⃣ 比赛实时进行，定期播报进度
5️⃣ 比赛结束后结算积分和奖金"""
    await help_cmd.finish(help_text)