backend/app/core/config.py

from pydantic_settings import BaseSettings, SettingsConfigDict

class Settings(BaseSettings):
    DATABASE_URL: str
    JWT_SECRET: str
    REDIS_URL: str = "redis://localhost:6379/0"
    MODEL_DIR: str = "../models/"
    UPLOAD_DIR: str = "uploads/"
    LOG_LEVEL: str = "INFO"
    ENABLE_LLM_EXPLANATION: bool = True
    HUGGINGFACE_API_KEY: str | None = None
    API_URL: str = "https://api-inference.huggingface.co/models/mistralai/Mistral-7B-Instruct-v0.3"
    SESSION_SECRET_KEY: str = "fallback_secret_if_not_found"
    GOOGLE_CLIENT_ID: str | None = None
    GOOGLE_CLIENT_SECRET: str | None = None
    SMTP_USER: str | None = None
    SMTP_PASSWORD: str | None = None
    SMTP_SENDER_EMAIL: str | None = None
    SMTP_PORT: int = 587
    SMTP_SERVER: str | None = None
    BREVO_API_KEY: str | None = None
    FRONTEND_URL: str = "http://localhost:3000"
    TURNSTILE_SECRET_KEY: str | None = None
    
    R2_ENDPOINT_URL: str | None = None
    R2_ACCESS_KEY_ID: str | None = None
    R2_SECRET_ACCESS_KEY: str | None = None
    R2_BUCKET_NAME: str | None = None

    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        extra="ignore"
    )

settings = Settings()