"""
Configuration settings for Authentication Service
Loads environment variables and provides configuration object
"""

import os
from pydantic_settings import BaseSettings
from typing import Optional

class Settings(BaseSettings):
    """Application settings using Pydantic BaseSettings"""
    
    # Database settings
    DATABASE_URL: str = os.getenv(
        "DATABASE_URL", 
        # If DATABASE_URL is not set, raise an error to force proper configuration
        # For development, you can create a .env file with DATABASE_URL=mysql+aiomysql://user:password@host/dbname
    )
    
    # JWT settings
    JWT_SECRET_KEY: str = os.getenv(
        "JWT_SECRET_KEY", 
        # If JWT_SECRET_KEY is not set, raise an error to force proper configuration
        # For development, you can create a .env file with JWT_SECRET_KEY=your-secret-key
    )
    JWT_ALGORITHM: str = "HS256"
    JWT_EXPIRATION_HOURS: int = 24
    
    # Security settings
    BCRYPT_ROUNDS: int = 12
    
    # Application settings
    APP_NAME: str = "Weibo-HotSign Authentication Service"
    DEBUG: bool = os.getenv("DEBUG", "False").lower() == "true"
    HOST: str = os.getenv("HOST", "0.0.0.0")
    PORT: int = int(os.getenv("PORT", 8000))
    
    # CORS settings
    ALLOWED_ORIGINS: list = [
        "http://localhost:3000",
        "http://localhost:80", 
        "http://127.0.0.1:3000"
    ]
    
    class Config:
        case_sensitive = True
        env_file = ".env"

# Create global settings instance
settings = Settings()