# SPDX-FileCopyrightText: 2026 James R. Barlow
# SPDX-License-Identifier: AGPL-3.0-or-later

"""Launch the OCRmyPDF batch web interface.

Usage::

    python -m webui

Configuration is read from ``OCRMYPDF_WEBUI_*`` environment variables; see
``webui/README.md``.
"""

from __future__ import annotations

import os
import sys


def main() -> int:
    """Run the ASGI server until interrupted."""
    try:
        import uvicorn
    except ImportError:
        sys.stderr.write(
            "The web interface needs its extra dependencies:\n"
            "    uv sync --extra webui\n"
            "    # or: pip install 'fastapi' 'uvicorn[standard]' 'python-multipart'\n"
        )
        return 1

    host = os.environ.get("OCRMYPDF_WEBUI_HOST", "0.0.0.0")  # noqa: S104
    port = int(os.environ.get("OCRMYPDF_WEBUI_PORT", "8000"))

    # Deliberately single-process: batch state lives in this process's memory,
    # so a second worker would not see batches created by the first. Scale by
    # raising OCRMYPDF_WEBUI_WORKERS (OCR worker threads), not server workers.
    uvicorn.run(
        "webui.app:app",
        host=host,
        port=port,
        workers=1,
        access_log=False,
        proxy_headers=True,
        forwarded_allow_ips=os.environ.get("OCRMYPDF_WEBUI_FORWARDED_ALLOW_IPS", ""),
        timeout_keep_alive=75,
    )
    return 0


if __name__ == "__main__":
    sys.exit(main())