backend/config.py

"""
Configuration for the PDF Accessibility Pipeline web backend.
Loads from .env in the project root (parent of backend/).
"""
import os
from pathlib import Path
from dotenv import load_dotenv

# The backend/ directory
_BACKEND_DIR = Path(__file__).resolve().parent

# The project root (pdf-script-web/)
_PROJECT_ROOT = _BACKEND_DIR.parent

# Load .env from project root
load_dotenv(_PROJECT_ROOT / ".env")

def _resolve(env_var: str, default: Path) -> Path:
    val = os.environ.get(env_var)
    if val:
        p = Path(val)
        if not p.is_absolute():
            p = (_PROJECT_ROOT / p).resolve()
        return p
    return default.resolve()


# PIPELINE_DIR: where the pdf-script repo lives
PIPELINE_DIR: Path = _resolve(
    "PIPELINE_DIR",
    _PROJECT_ROOT.parent / "pdf-script",
)

# SESSIONS_DIR: temp directory for pipeline sessions
SESSIONS_DIR: Path = _resolve(
    "SESSIONS_DIR",
    Path("/tmp/pdf-pipeline-sessions"),
)

# YOLO model path
YOLO_MODEL_PATH: Path = _resolve(
    "YOLO_MODEL_PATH",
    PIPELINE_DIR / "yolov11x_best.pt",
)

# Java tagger JAR
JAR_PATH: Path = PIPELINE_DIR / "pdftagger.jar"

# Backend port
BACKEND_PORT: int = int(os.environ.get("BACKEND_PORT", "8000"))

# Google OAuth client ID (from Google Cloud Console)
GOOGLE_CLIENT_ID: str = os.environ.get("GOOGLE_CLIENT_ID", "")

# Secret key for signing JWTs (generate a strong random string for production)
JWT_SECRET: str = os.environ.get("JWT_SECRET", "change-me-in-production")

# SQLite database path
DB_PATH: Path = _resolve("DB_PATH", SESSIONS_DIR / "itagpdf.db")