from pydantic import BaseModel
from typing import Optional
from datetime import datetime
from enum import Enum

class GameTypeEnum(str, Enum):
    """题目类型枚举，限制为A-E"""
    TYPE_A = "A"
    TYPE_B = "B"
    TYPE_C = "C"
    TYPE_D = "D"
    TYPE_E = "E"

class History(BaseModel):
    """历史记录数据模型
    
    用于规范历史记录的数据结构，确保数据的一致性和有效性
    """
    id: Optional[int] = None
    game_type: GameTypeEnum
    question: str
    numbers: str
    answers: str
    created_at: Optional[datetime] = None
    is_favorite: bool = False
    is_deleted: bool = False
    

    class Config:
        json_encoders = {
            datetime: lambda v: v.isoformat()
        }
        
    @classmethod
    def from_db_record(cls, record: dict):
        """从数据库记录创建模型对象"""
        return cls(**record)
    
    def to_db_record(self):
        """转换为数据库记录格式"""
        record = self.model_dump(exclude={'id', 'created_at'} if self.id is None else {'created_at'})
        # 确保game_type是字符串值
        if isinstance(record['game_type'], GameTypeEnum):
            record['game_type'] = record['game_type'].value
        return record