app/core/config.py

from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8")

    # Redis
    redis_url: str = "redis://localhost:6379/0"

    # LLM
    llm_provider: str = "google"
    llm_model_fast: str = "gemini-2.0-flash"
    llm_model_smart: str = "gemini-2.0-flash"

    # API Keys
    openai_api_key: str = ""
    google_api_key: str = ""
    zai_api_key: str = ""
    groq_api_key: str = ""

    # Session
    session_ttl_seconds: int = 7200

    # Auth
    nextauth_secret: str = ""
    frontend_url: str = "http://localhost:3000"
    user_profile_ttl_seconds: int = 30 * 24 * 60 * 60  # 30 days

    # Usage limits
    free_tier_limit: int = 3
    usage_ttl_seconds: int = 35 * 24 * 60 * 60  # 35 days

    # Admin emails (comma-separated) — unlimited usage, no gating
    admin_emails: str = ""

    @property
    def admin_email_set(self) -> set[str]:
        """Parse comma-separated admin emails into a set for fast lookup."""
        if not self.admin_emails:
            return set()
        return {e.strip().lower() for e in self.admin_emails.split(",") if e.strip()}


settings = Settings()