from pydantic_settings import BaseSettings
from functools import lru_cache

class Settings(BaseSettings):
    # 应用配置
    APP_HOST: str = "0.0.0.0"
    APP_PORT: int = 8000
    APP_DEBUG: bool = True
    
    # Railway数据库配置
    RAILWAY_DB_HOST: str = "localhost"
    RAILWAY_DB_PORT: int = 3306
    RAILWAY_DB_USER: str = "root"
    RAILWAY_DB_PASSWORD: str = ""
    RAILWAY_DB_NAME: str = "railway"
    
    # Tunnel数据库配置
    TUNNEL_DB_HOST: str = "localhost"
    TUNNEL_DB_PORT: int = 3306
    TUNNEL_DB_USER: str = "root"
    TUNNEL_DB_PASSWORD: str = ""
    TUNNEL_DB_NAME: str = "Tunnel"
    
    @property
    def RAILWAY_DATABASE_URL(self) -> str:
        return f"mysql+pymysql://{self.RAILWAY_DB_USER}:{self.RAILWAY_DB_PASSWORD}@{self.RAILWAY_DB_HOST}:{self.RAILWAY_DB_PORT}/{self.RAILWAY_DB_NAME}?charset=utf8mb4"
    
    @property
    def TUNNEL_DATABASE_URL(self) -> str:
        return f"mysql+pymysql://{self.TUNNEL_DB_USER}:{self.TUNNEL_DB_PASSWORD}@{self.TUNNEL_DB_HOST}:{self.TUNNEL_DB_PORT}/{self.TUNNEL_DB_NAME}?charset=utf8mb4"
    
    class Config:
        env_file = ".env"
        extra = "ignore"

@lru_cache()
def get_settings():
    return Settings()

settings = get_settings()