bdlg2023-sms-back/app/core/config.py

"""
File with environment variables and general configuration logic.
`SECRET_KEY`, `ENVIRONMENT` etc. map to env variables with the same names.

Pydantic priority ordering:

1. (Most important, will overwrite everything) - environment variables
2. `.env` file in root folder of project
3. Default values

For project name, version, description we use pyproject.toml
For the rest, we use file `.env` (gitignored), see `.env.example`

See https://pydantic-docs.helpmanual.io/usage/settings/

Note, complex types like lists are read as json-encoded strings.
"""

import tomllib
from pathlib import Path
from typing import Literal

from pydantic import AnyHttpUrl, EmailStr
from pydantic_settings import BaseSettings, SettingsConfigDict

PROJECT_DIR = Path(__file__).parent.parent.parent
with open(f"{PROJECT_DIR}/pyproject.toml", "rb") as f:
    PYPROJECT_CONTENT = tomllib.load(f)["tool"]["poetry"]


def build_postgreuri(
    scheme: str, username: str, password: str, host: str, port: int = 0, path: str = ""
):
    fullhost = host + (f":{port}" if port > 0 else "")
    return f"{scheme}://{username}:{password}@{fullhost}{path}"


class Settings(BaseSettings):
    # CORE SETTINGS
    FRONT_END_URL: str
    SECRET_KEY: str
    RESET_REQUEST_LIMIT: int = 3
    RESET_REQUEST_WINDOW_HOUR: int = 1
    ENVIRONMENT: Literal["DEV", "PYTEST", "STG", "PRD"] = "DEV"
    SECURITY_BCRYPT_ROUNDS: int = 12
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 11520  # 8 days
    REFRESH_TOKEN_EXPIRE_MINUTES: int = 40320  # 28 days
    BACKEND_CORS_ORIGINS: list[AnyHttpUrl | Literal["*"]] = []
    ALLOWED_HOSTS: list[str] = ["localhost", "127.0.0.1"]

    INACTIVITY_SMS_SENDER_THRESHOLD_SECONDS: int = 180

    # PROJECT NAME, VERSION AND DESCRIPTION
    PROJECT_NAME: str = PYPROJECT_CONTENT["name"]
    VERSION: str = PYPROJECT_CONTENT["version"]
    DESCRIPTION: str = PYPROJECT_CONTENT["description"]

    # Email account to send reset password
    SMTP_HOST: str = ""
    SMTP_PORT: int = 587
    SMTP_USERNAME: str = ""
    SMTP_PASSWORD: str = ""
    SMTP_USE_TLS: bool = True
    EMAIL_FROM_ADDRESS: str = "no-reply@example.com"
    EMAIL_FROM_NAME: str = "BDLG Planner"

    # REDIS
    REDIS_URL: str = "redis://localhost:6379"

    # POSTGRESQL DEFAULT DATABASE
    DEFAULT_DATABASE_HOSTNAME: str
    DEFAULT_DATABASE_USER: str
    DEFAULT_DATABASE_PASSWORD: str
    DEFAULT_DATABASE_PORT: str
    DEFAULT_DATABASE_DB: str

    @property
    def DEFAULT_SQLALCHEMY_DATABASE_URI(self) -> str:
        return build_postgreuri(
            scheme="postgresql",
            username=self.DEFAULT_DATABASE_USER,
            password=self.DEFAULT_DATABASE_PASSWORD,
            host=self.DEFAULT_DATABASE_HOSTNAME,
            port=int(self.DEFAULT_DATABASE_PORT),
            path=f"/{self.DEFAULT_DATABASE_DB}",
        )

    # POSTGRESQL TEST DATABASE
    TEST_DATABASE_HOSTNAME: str = "postgres"
    TEST_DATABASE_USER: str = "postgres"
    TEST_DATABASE_PASSWORD: str = "postgres"
    TEST_DATABASE_PORT: str = "5432"
    TEST_DATABASE_DB: str = "postgres"

    @property
    def TEST_SQLALCHEMY_DATABASE_URI(self) -> str:
        return build_postgreuri(
            scheme="postgresql",
            username=self.TEST_DATABASE_USER,
            password=self.TEST_DATABASE_PASSWORD,
            host=self.TEST_DATABASE_HOSTNAME,
            port=int(self.TEST_DATABASE_PORT),
            path=f"/{self.TEST_DATABASE_DB}",
        )

    # SMS batch
    BATCH_SMS_PHONE_NUMBER: str = ""

    # FIRST SUPERUSER
    FIRST_SUPERUSER_EMAIL: EmailStr
    FIRST_SUPERUSER_PASSWORD: str

    model_config = SettingsConfigDict(env_file=f"{PROJECT_DIR}/.env", case_sensitive=True)


settings: Settings = Settings()  # type: ignore