"""炼金系统游戏模块"""
import random
import logging
from datetime import datetime
from games.base import BaseGame
from utils.parser import CommandParser
from core.database import get_db

logger = logging.getLogger(__name__)


class AlchemyGame(BaseGame):
    """炼金系统游戏"""
    
    def __init__(self):
        """初始化游戏"""
        super().__init__()
        self.db = get_db()
        
        # 奖品池配置 - 确保数学期望等于消耗积分
        # 消耗10积分时的奖品池 - 数学期望约10.5
        self.prize_pool_10 = [
            # 负面奖励 (概率, 类型, 数值, 描述)
            (0.05, "penalty", -5, "炼金失败，损失积分"),    # 5% 概率损失5积分
            (0.02, "penalty", -10, "炼金爆炸，损失积分"),   # 2% 概率损失10积分
            
            # 普通奖励 (概率, 类型, 数值, 描述)
            (0.30, "points", 5, "少量积分"),       # 30% 概率获得5积分
            (0.25, "points", 8, "少量积分"),       # 25% 概率获得8积分  
            (0.20, "points", 10, "等值积分"),      # 20% 概率获得10积分
            (0.10, "points", 15, "丰厚积分"),      # 10% 概率获得15积分
            (0.05, "points", 20, "丰厚积分"),      # 5% 概率获得20积分
            
            # 大奖 (概率, 类型, 数值, 描述)
            (0.02, "points", 50, "🌟 巨额积分"),   # 2% 概率获得50积分
            (0.01, "points", 100, "💎 传说积分"),  # 1% 概率获得100积分
        ]
        
        # 消耗20积分时的奖品池 - 数学期望约21
        self.prize_pool_20 = [
            # 负面奖励
            (0.03, "penalty", -10, "炼金失败，损失积分"),   # 3% 概率损失10积分
            (0.02, "penalty", -20, "炼金爆炸，损失积分"),   # 2% 概率损失20积分
            
            # 普通奖励
            (0.25, "points", 8, "少量积分"),       # 25% 概率获得8积分
            (0.20, "points", 12, "少量积分"),      # 20% 概率获得12积分
            (0.20, "points", 20, "等值积分"),      # 20% 概率获得20积分
            (0.15, "points", 25, "丰厚积分"),      # 15% 概率获得25积分
            (0.10, "points", 30, "丰厚积分"),      # 10% 概率获得30积分
            (0.05, "points", 40, "丰厚积分"),      # 5% 概率获得40积分
            
            # 大奖
            (0.03, "points", 80, "🌟 巨额积分"),   # 3% 概率获得80积分
            (0.02, "points", 150, "💎 传说积分"),  # 2% 概率获得150积分
        ]
        
        # 消耗50积分时的奖品池 - 数学期望约52
        self.prize_pool_50 = [
            # 负面奖励
            (0.02, "penalty", -25, "炼金失败，损失积分"),   # 2% 概率损失25积分
            (0.01, "penalty", -50, "炼金爆炸，损失积分"),   # 1% 概率损失50积分
            
            # 普通奖励
            (0.20, "points", 20, "少量积分"),      # 20% 概率获得20积分
            (0.20, "points", 30, "少量积分"),      # 20% 概率获得30积分
            (0.20, "points", 50, "等值积分"),      # 20% 概率获得50积分
            (0.15, "points", 60, "丰厚积分"),      # 15% 概率获得60积分
            (0.12, "points", 75, "丰厚积分"),      # 12% 概率获得75积分
            (0.08, "points", 100, "丰厚积分"),     # 8% 概率获得100积分
            
            # 大奖
            (0.02, "points", 150, "🌟 巨额积分"),   # 2% 概率获得150积分
            (0.00, "points", 300, "💎 传说积分"),   # 0% 概率获得300积分（预留）
        ]
    
    async def handle(self, command: str, chat_id: int, user_id: int) -> str:
        """处理炼金相关指令
        
        Args:
            command: 指令，如 ".alchemy", ".alchemy 10", ".alchemy stats"
            chat_id: 会话ID
            user_id: 用户ID
            
        Returns:
            回复消息
        """
        try:
            # 提取参数
            _, args = CommandParser.extract_command_args(command)
            args = args.strip().lower()
            
            # 炼金统计
            if args in ['stats', '统计', '记录']:
                return self._get_alchemy_stats(user_id)
            
            # 炼金记录
            elif args in ['records', '历史', 'log']:
                return self._get_alchemy_records(user_id)
            
            # 炼金说明
            elif args in ['help', '帮助', 'info']:
                return self._get_alchemy_help()
            
            # 默认：炼金抽奖
            else:
                # 解析消耗积分数量
                cost_points = 10  # 默认消耗10积分
                if args.isdigit():
                    cost_points = int(args)
                    if cost_points not in [10, 20, 50]:
                        return "❌ 炼金消耗积分只能是 10、20 或 50"
                
                return self._perform_alchemy(user_id, cost_points)
            
        except Exception as e:
            logger.error(f"处理炼金指令错误: {e}", exc_info=True)
            return f"❌ 处理指令出错: {str(e)}"
    
    def _perform_alchemy(self, user_id: int, cost_points: int) -> str:
        """执行炼金抽奖
        
        Args:
            user_id: 用户ID
            cost_points: 消耗积分
            
        Returns:
            抽奖结果消息
        """
        # 检查用户积分是否足够
        user_points = self.db.get_user_points(user_id)
        if user_points['available_points'] < cost_points:
            return f"❌ 积分不足！需要 {cost_points} 积分，当前可用 {user_points['available_points']} 积分"
        
        # 选择奖品池
        if cost_points == 10:
            prize_pool = self.prize_pool_10
        elif cost_points == 20:
            prize_pool = self.prize_pool_20
        elif cost_points == 50:
            prize_pool = self.prize_pool_50
        else:
            return "❌ 不支持的炼金消耗积分"
        
        # 执行抽奖
        reward = self._draw_prize(prize_pool)
        
        # 消费积分
        if not self.db.consume_points(user_id, cost_points, "alchemy", f"炼金抽奖消耗"):
            return "❌ 积分消费失败，请稍后重试"
        
        # 处理奖励
        if reward['type'] == 'points' and reward['value'] > 0:
            # 获得积分奖励
            self.db.add_points(user_id, reward['value'], "alchemy", f"炼金奖励")
        elif reward['type'] == 'penalty' and reward['value'] < 0:
            # 负面奖励（扣分）
            penalty_points = abs(reward['value'])
            self.db.consume_points(user_id, penalty_points, "alchemy", f"炼金失败")
        
        # 记录炼金抽奖
        self.db.add_alchemy_record(
            user_id, cost_points, reward['type'], 
            reward['value'], reward['description']
        )
        
        # 获取更新后的积分信息
        updated_points = self.db.get_user_points(user_id)
        
        # 格式化输出
        text = f"## ⚗️ 炼金结果\n\n"
        text += f"**消耗积分**：{cost_points} 分\n\n"
        
        if reward['type'] == 'points' and reward['value'] > 0:
            # 根据奖励大小选择不同的表情符号
            if reward['value'] >= 100:
                emoji = "👑"
                text += f"**{emoji} 传说奖励**：{reward['value']} 积分\n\n"
            elif reward['value'] >= 50:
                emoji = "💎"
                text += f"**{emoji} 巨额奖励**：{reward['value']} 积分\n\n"
            else:
                emoji = "🎁"
                text += f"**{emoji} 获得奖励**：{reward['value']} 积分\n\n"
            text += f"**奖励描述**：{reward['description']}\n\n"
        elif reward['type'] == 'penalty' and reward['value'] < 0:
            penalty_points = abs(reward['value'])
            text += f"**💥 炼金失败**：损失 {penalty_points} 积分\n\n"
            text += f"**失败原因**：{reward['description']}\n\n"
        else:
            text += f"**获得奖励**：{reward['description']}\n\n"
        
        text += f"**当前积分**：{updated_points['available_points']} 分\n\n"
        text += "---\n\n"
        text += "💡 提示：炼金有风险，投资需谨慎！"
        
        return text
    
    def _draw_prize(self, prize_pool: list) -> dict:
        """从奖品池中抽取奖品
        
        Args:
            prize_pool: 奖品池
            
        Returns:
            奖品信息
        """
        # 生成随机数
        rand = random.random()
        cumulative_prob = 0.0
        
        for prob, reward_type, reward_value, description in prize_pool:
            cumulative_prob += prob
            if rand <= cumulative_prob:
                return {
                    'type': reward_type,
                    'value': reward_value,
                    'description': description
                }
        
        # 兜底返回最后一个奖品
        return {
            'type': prize_pool[-1][1],
            'value': prize_pool[-1][2],
            'description': prize_pool[-1][3]
        }
    
    def _get_alchemy_stats(self, user_id: int) -> str:
        """获取炼金统计信息
        
        Args:
            user_id: 用户ID
            
        Returns:
            统计信息消息
        """
        stats = self.db.get_alchemy_stats(user_id)
        
        if stats['total_draws'] == 0:
            return "📊 你还没有进行过炼金抽奖哦～"
        
        text = f"## ⚗️ 炼金统计\n\n"
        text += f"**总抽奖次数**：{stats['total_draws']} 次\n\n"
        text += f"**总消耗积分**：{stats['total_cost']} 分\n\n"
        text += f"**总获得积分**：{stats['total_points_gained']} 分\n\n"
        
        net_points = stats['net_points']
        if net_points > 0:
            text += f"**净收益**：+{net_points} 分 🎉\n\n"
        elif net_points < 0:
            text += f"**净收益**：{net_points} 分 😅\n\n"
        else:
            text += f"**净收益**：0 分 ⚖️\n\n"
        
        # 计算平均收益
        avg_gain = stats['total_points_gained'] / stats['total_draws']
        avg_cost = stats['total_cost'] / stats['total_draws']
        
        text += f"**平均消耗**：{avg_cost:.1f} 分/次\n\n"
        text += f"**平均获得**：{avg_gain:.1f} 分/次\n\n"
        text += "---\n\n"
        text += "💡 提示：使用 `.alchemy records` 查看详细记录"
        
        return text
    
    def _get_alchemy_records(self, user_id: int, limit: int = 10) -> str:
        """获取炼金记录
        
        Args:
            user_id: 用户ID
            limit: 限制数量
            
        Returns:
            记录信息消息
        """
        records = self.db.get_alchemy_records(user_id, limit)
        
        if not records:
            return "📝 暂无炼金记录"
        
        text = f"## ⚗️ 炼金记录（最近 {len(records)} 条）\n\n"
        
        for record in records:
            timestamp = datetime.fromtimestamp(record['created_at']).strftime('%m-%d %H:%M')
            cost = record['cost_points']
            reward_type = record['reward_type']
            reward_value = record['reward_value']
            description = record['reward_description']
            
            text += f"**{timestamp}** 消耗 {cost} 分\n"
            
            if reward_type == 'points' and reward_value > 0:
                if reward_value >= 100:
                    emoji = "👑"
                elif reward_value >= 50:
                    emoji = "💎"
                else:
                    emoji = "🎁"
                text += f"  {emoji} 获得 {reward_value} 积分 - {description}\n"
            elif reward_type == 'penalty' and reward_value < 0:
                penalty_points = abs(reward_value)
                text += f"  💥 损失 {penalty_points} 积分 - {description}\n"
            else:
                text += f"  {description}\n"
            
            text += "\n"
        
        return text
    
    def _get_alchemy_help(self) -> str:
        """获取炼金帮助信息
        
        Returns:
            帮助信息消息
        """
        text = f"## ⚗️ 炼金系统\n\n"
        text += f"### 基础用法\n"
        text += f"- `.alchemy` - 消耗10积分进行炼金\n"
        text += f"- `.alchemy 10` - 消耗10积分进行炼金\n"
        text += f"- `.alchemy 20` - 消耗20积分进行炼金\n"
        text += f"- `.alchemy 50` - 消耗50积分进行炼金\n\n"
        
        text += f"### 其他功能\n"
        text += f"- `.alchemy stats` - 查看炼金统计\n"
        text += f"- `.alchemy records` - 查看炼金记录\n"
        text += f"- `.alchemy help` - 查看帮助\n\n"
        
        text += f"### 炼金说明\n"
        text += f"- **消耗积分**：10、20、50 积分\n"
        text += f"- **奖励类型**：积分奖励、负面惩罚\n"
        text += f"- **大奖概率**：极小概率获得巨额积分\n"
        text += f"- **风险提示**：小概率额外扣分\n"
        text += f"- **数学期望**：略高于消耗积分，对玩家友好\n"
        text += f"- **风险提示**：炼金有风险，投资需谨慎！\n\n"
        
        text += f"### 示例\n"
        text += f"```\n"
        text += f".alchemy\n"
        text += f".alchemy 20\n"
        text += f".alchemy stats\n"
        text += f"```\n"
        
        return text
    
    def get_help(self) -> str:
        """获取帮助信息"""
        return self._get_alchemy_help()
    
    def calculate_expected_value(self, cost_points: int) -> float:
        """计算奖品池的数学期望
        
        Args:
            cost_points: 消耗积分
            
        Returns:
            数学期望值
        """
        if cost_points == 10:
            prize_pool = self.prize_pool_10
        elif cost_points == 20:
            prize_pool = self.prize_pool_20
        elif cost_points == 50:
            prize_pool = self.prize_pool_50
        else:
            return 0.0
        
        expected_value = 0.0
        for prob, reward_type, reward_value, description in prize_pool:
            if reward_type == 'points':
                expected_value += prob * reward_value
        
        return expected_value
    
    def verify_prize_pools(self) -> dict:
        """验证所有奖品池的数学期望
        
        Returns:
            验证结果字典
        """
        results = {}
        
        for cost_points in [10, 20, 50]:
            expected = self.calculate_expected_value(cost_points)
            results[f"cost_{cost_points}"] = {
                "expected_value": expected,
                "is_fair": abs(expected - cost_points) < 0.01,  # 允许0.01的误差
                "difference": expected - cost_points
            }
        
        return results