"""
config.py
=========
Configuration object loaded by Flask from environment variables.

The application expects values to be provided via Portainer environment
variables or a local .env file during development.

All values have sensible defaults where safe, but the following MUST be
set in production:
  - APP_SECRET_KEY
  - ADMIN_PASSWORD
  - SMTP_PASS
  - PUBLIC_BASE_URL
"""

import os
from dotenv import load_dotenv

# Load variables from .env file if present (development mode).
load_dotenv()


class Config:
    # Flask secret key: used to sign session cookies. Must be a long random string in production.
    SECRET_KEY = os.environ.get('APP_SECRET_KEY', 'dev-secret-change-me')

    # SQLite database path inside the container.
    DATABASE = os.environ.get('DATABASE', '/app/data/booth.db')

    # Directory where uploaded MP3 files are stored inside the container.
    UPLOAD_FOLDER = os.environ.get('UPLOAD_FOLDER', '/app/uploads')

    # Only MP3 uploads are allowed.
    ALLOWED_EXTENSIONS = {'mp3'}

    # SMTP server settings for sending customer emails.
    SMTP_HOST = os.environ.get('SMTP_HOST', 'mailroot8.namespro.ca')
    SMTP_PORT = int(os.environ.get('SMTP_PORT', '465'))
    SMTP_USER = os.environ.get('SMTP_USER', 'ai@hallsworth.ca')
    SMTP_PASS = os.environ.get('SMTP_PASS', '')
    SMTP_FROM = os.environ.get('SMTP_FROM', 'ai@hallsworth.ca')

    # Admin login password (plain text, set via env).
    ADMIN_PASSWORD = os.environ.get('ADMIN_PASSWORD', '')

    # Optional operator alert email. Currently unused because the dashboard is the queue.
    ADMIN_ALERT_EMAIL = os.environ.get('ADMIN_ALERT_EMAIL', '')

    # Maximum number of revision rounds a customer is allowed to request automatically.
    MAX_REVISIONS = int(os.environ.get('MAX_REVISIONS', '2'))

    # Public HTTPS URL used in customer emails and QR codes.
    PUBLIC_BASE_URL = os.environ.get('PUBLIC_BASE_URL', 'http://127.0.0.1:5000')

    # Booth name used in email sign-offs.
    BOOTH_NAME = os.environ.get('BOOTH_NAME', 'Trollgorithm Theme Songs')

    # Internal port gunicorn listens on inside the container.
    INTERNAL_PORT = int(os.environ.get('INTERNAL_PORT', '8000'))

    # Price per version shown on the receipt page (informational only; payment is manual).
    PRICE_PER_VERSION = float(os.environ.get('PRICE_PER_VERSION', '10.00'))
    CURRENCY = os.environ.get('CURRENCY', 'CAD')