FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

# Matplotlib, Kaleido (Plotly -> PNG) and python-docx transitively need a handful
# of system libs. Installing them here is cheaper than figuring out per-import errors later.
RUN apt-get update && apt-get install -y --no-install-recommends \
        build-essential \
        libfreetype6-dev \
        libjpeg62-turbo-dev \
        libpng-dev \
        libxml2-dev \
        libxslt1-dev \
        zlib1g-dev \
        fonts-dejavu-core \
        ca-certificates \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

COPY requirements.txt ./project-requirements.txt
COPY report_service/requirements.txt ./service-requirements.txt
RUN pip install --no-cache-dir -r project-requirements.txt -r service-requirements.txt

COPY . .

ENV PYTHONPATH=/app
EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD python -c "import urllib.request,sys; sys.exit(0 if urllib.request.urlopen('http://127.0.0.1:8000/health', timeout=3).status == 200 else 1)"

CMD ["uvicorn", "report_service.main:app", "--host", "0.0.0.0", "--port", "8000"]