"""
GameBase 游戏基类
定义游戏的通用接口和状态管理
"""
from abc import ABC, abstractmethod
from typing import Dict, List, Any, Optional
from enum import Enum
import time
import json


class GamePhase(Enum):
    """游戏阶段枚举"""
    WAITING = "waiting"      # 等待玩家
    READY = "ready"          # 准备开始
    STARTING = "starting"    # 开始中
    PLAYING = "playing"      # 游戏中
    PAUSED = "paused"        # 暂停
    ENDED = "ended"          # 已结束


class GameState:
    """
    游戏状态类
    管理游戏的所有状态数据
    """
    
    def __init__(self, game_type: str, room_id: str):
        self.game_type = game_type
        self.room_id = room_id
        
        self.phase = GamePhase.WAITING
        self.round = 0
        self.turn_count = 0
        
        self.current_turn_player_id: Optional[str] = None
        self.winner_id: Optional[str] = None
        
        self.started_at: Optional[float] = None
        self.ended_at: Optional[float] = None
        
        # 玩家状态
        self.player_states: Dict[str, Dict] = {}
        
        # 游戏特定数据
        self.data: Dict[str, Any] = {}
        
        # 历史记录
        self.history: List[Dict] = []
    
    def start(self):
        """开始游戏"""
        self.phase = GamePhase.PLAYING
        self.round = 1
        self.started_at = time.time()
    
    def end(self, winner_id: Optional[str] = None):
        """结束游戏"""
        self.phase = GamePhase.ENDED
        self.winner_id = winner_id
        self.ended_at = time.time()
    
    def next_turn(self, player_id: str):
        """切换回合"""
        self.current_turn_player_id = player_id
        self.turn_count += 1
    
    def add_history(self, action: str, player_id: str, data: Dict):
        """添加历史记录"""
        self.history.append({
            'turn': self.turn_count,
            'action': action,
            'player_id': player_id,
            'data': data,
            'timestamp': time.time()
        })
    
    def set_player_state(self, player_id: str, state: Dict):
        """设置玩家状态"""
        self.player_states[player_id] = state
    
    def get_player_state(self, player_id: str) -> Optional[Dict]:
        """获取玩家状态"""
        return self.player_states.get(player_id)
    
    def to_dict(self, player_id: Optional[str] = None) -> Dict[str, Any]:
        """
        序列化为字典
        player_id: 如果提供，包含该玩家的私有信息
        """
        return {
            'game_type': self.game_type,
            'room_id': self.room_id,
            'phase': self.phase.value,
            'round': self.round,
            'turn_count': self.turn_count,
            'current_turn': self.current_turn_player_id,
            'winner': self.winner_id,
            'started_at': self.started_at,
            'ended_at': self.ended_at,
            'player_states': self.player_states,
            'data': self.data,
            'history': self.history[-20:] if len(self.history) > 20 else self.history,
        }
    
    def to_json(self) -> str:
        """序列化为 JSON"""
        return json.dumps(self.to_dict(), default=str)


class GameBase(ABC):
    """
    游戏基类
    所有具体游戏必须继承此类
    """
    
    def __init__(self, room_id: str, game_type: str):
        self.room_id = room_id
        self.game_type = game_type
        self.state = GameState(game_type, room_id)
        
        self.players: Dict[str, Any] = {}  # player_id -> Player
        self.player_order: List[str] = []  # 玩家顺序
        
        self.is_started = False
        self.is_ended = False
    
    @property
    @abstractmethod
    def min_players(self) -> int:
        """最少玩家数"""
        pass
    
    @property
    @abstractmethod
    def max_players(self) -> int:
        """最多玩家数"""
        pass
    
    @property
    def player_count(self) -> int:
        """当前玩家数"""
        return len(self.players)
    
    def add_player(self, player):
        """添加玩家"""
        if self.player_count >= self.max_players:
            raise ValueError("房间已满")
        
        self.players[player.id] = player
        if player.id not in self.player_order:
            self.player_order.append(player.id)
        
        self.state.set_player_state(player.id, {
            'name': player.name,
            'is_ai': player.is_ai,
            'seat': player.seat_number,
        })
    
    def remove_player(self, player_id: str):
        """移除玩家"""
        if player_id in self.players:
            del self.players[player_id]
        if player_id in self.player_order:
            self.player_order.remove(player_id)
    
    @abstractmethod
    def can_start(self) -> bool:
        """检查是否可以开始游戏"""
        pass
    
    @abstractmethod
    def start(self):
        """开始游戏"""
        pass
    
    @abstractmethod
    def handle_action(self, player_id: str, action: str, data: Dict) -> Dict:
        """
        处理玩家操作
        返回: {'success': bool, 'message': str, 'state_update': Dict}
        """
        pass
    
    @abstractmethod
    def get_valid_actions(self, player_id: str) -> List[str]:
        """获取玩家当前可用的操作列表"""
        pass
    
    @abstractmethod
    def check_winner(self) -> Optional[str]:
        """检查是否有获胜者"""
        pass
    
    def get_current_player(self) -> Optional[Any]:
        """获取当前回合玩家"""
        if self.state.current_turn_player_id:
            return self.players.get(self.state.current_turn_player_id)
        return None
    
    def next_player(self) -> Optional[Any]:
        """切换到下一个玩家"""
        if not self.player_order:
            return None
        
        current_id = self.state.current_turn_player_id
        if not current_id or current_id not in self.player_order:
            next_id = self.player_order[0]
        else:
            current_idx = self.player_order.index(current_id)
            next_idx = (current_idx + 1) % len(self.player_order)
            next_id = self.player_order[next_idx]
        
        self.state.next_turn(next_id)
        return self.players.get(next_id)
    
    def end_game(self, winner_id: Optional[str] = None):
        """结束游戏"""
        self.is_ended = True
        self.state.end(winner_id)
    
    def to_dict(self) -> Dict[str, Any]:
        """序列化游戏状态"""
        return {
            'room_id': self.room_id,
            'game_type': self.game_type,
            'min_players': self.min_players,
            'max_players': self.max_players,
            'player_count': self.player_count,
            'is_started': self.is_started,
            'is_ended': self.is_ended,
            'state': self.state.to_dict(),
            'players': {
                pid: p.to_dict() for pid, p in self.players.items()
            }
        }