FROM python:3.11-slim

# System binaries:
#   - postgresql: pytest-postgresql spawns ephemeral test databases
#   - poppler-utils: provides pdfinfo / pdftotext, used by
#     backend/documents_parser/tests/test_summary_pdf_mapper_chain.py's
#     `_summary_pdf_to_textract_style_pages` helper for layout-preserving
#     PDF text extraction. Pure-Python alternatives (pymupdf, pypdf) don't
#     reproduce pdftotext -layout's row-major table cell ordering, which
#     the Elmhurst Summary extractor depends on.
RUN apt-get update \
    && apt-get install -y --no-install-recommends postgresql poppler-utils \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app
ENV PYTHONPATH=/app

# Copy requirements first so Docker can cache the install layer
COPY backend/engine/requirements.txt backend/engine/requirements.txt
COPY backend/app/requirements/requirements.txt backend/app/requirements/requirements.txt
COPY test.requirements.txt test.requirements.txt

RUN pip install --no-cache-dir \
    -r backend/engine/requirements.txt \
    -r backend/app/requirements/requirements.txt \
    -r test.requirements.txt

# Copy source
COPY . .

# pg_ctl refuses to run as root — create an unprivileged user
RUN useradd -m testuser && chown -R testuser /app
USER testuser

CMD ["pytest"]