"""
应用配置模块
"""
import os
from typing import Optional
from pydantic_settings import BaseSettings
from pydantic import Field
from sqlalchemy.orm import Session


class Settings(BaseSettings):
    """应用配置类"""
    
    # 应用配置
    APP_NAME: str = "AmazingData金融数据服务平台"
    APP_VERSION: str = "1.0.0"
    DEBUG: bool = Field(default=True, env="DEBUG")
    
    # 数据库配置 - 使用SQLite简化演示
    DATABASE_URL: str = Field(
        default="sqlite:///./amazing_data.db",
        env="DATABASE_URL"
    )
    
    # Redis配置
    REDIS_URL: str = Field(
        default="redis://localhost:6379/0",
        env="REDIS_URL"
    )
    
    # JWT配置
    SECRET_KEY: str = Field(
        default="your-secret-key-change-in-production",
        env="SECRET_KEY"
    )
    ACCESS_TOKEN_EXPIRE_HOURS: int = Field(default=24, env="ACCESS_TOKEN_EXPIRE_HOURS")
    ALGORITHM: str = "HS256"
    
    # 缓存配置
    CACHE_DEFAULT_PERIOD: str = "daily"
    CACHE_DEFAULT_DAYS: int = 365
    CACHE_AUTO_CLEANUP_DAYS: int = 7
    CACHE_BATCH_SIZE: int = 100
    CACHE_MISSING_THRESHOLD: float = 0.1
    
    # 实时数据配置
    REALTIME_SUBSCRIBE_INTERVAL: int = 1000
    
    class Config:
        env_file = ".env"
        case_sensitive = True


# 全局配置实例
settings = Settings()


def load_system_configs(db: Session):
    """
    从数据库加载系统配置到全局settings
    注意：这需要在数据库初始化后调用
    """
    from app.services.config_service import ConfigService
    
    system_configs = ConfigService.get_all_system_configs(db)
    
    if "DATABASE_URL" in system_configs:
        settings.DATABASE_URL = system_configs["DATABASE_URL"]
    
    if "REDIS_URL" in system_configs:
        settings.REDIS_URL = system_configs["REDIS_URL"]