from pydantic_settings import BaseSettings
from typing import List


class Settings(BaseSettings):
    """Application settings loaded from environment variables."""

    # Database
    DATABASE_URL: str

    # JWT Configuration
    JWT_SECRET: str
    JWT_ALGORITHM: str = "HS256"
    JWT_EXPIRATION_HOURS: int = 168  # 7 days

    # Better Auth Secret (must match frontend)
    BETTER_AUTH_SECRET: str

    # CORS Configuration
    CORS_ORIGINS: str = "http://localhost:3000"

    # OpenAI Configuration (supports OpenRouter)
    OPENAI_API_KEY: str
    OPENAI_MODEL: str = "gpt-4o-mini"
    OPENAI_BASE_URL: str = ""

    # MCP Server Configuration
    MCP_SERVER_PORT: int = 8001
    MCP_SERVER_HOST: str = "localhost"

    # Environment
    ENVIRONMENT: str = "development"
    DEBUG: bool = True

    @property
    def cors_origins_list(self) -> List[str]:
        """Parse CORS_ORIGINS string into list."""
        return [origin.strip() for origin in self.CORS_ORIGINS.split(",")]

    class Config:
        env_file = ".env"
        case_sensitive = True


# Global settings instance
settings = Settings()