FROM python:3.10-slim-bookworm

ENV DEBIAN_FRONTEND=noninteractive
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PYTHONPATH=/app

WORKDIR /app

# System dependencies for opencv, pyclipper, shapely C extensions
RUN apt-get update && apt-get install -y --no-install-recommends \
    libgl1 \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender1 \
    gcc \
    g++ \
    && rm -rf /var/lib/apt/lists/*

# Copy only requirements first for layer caching
COPY python/requirements.txt /tmp/requirements.txt

# Install core deps with opencv-headless (no GUI needed in container)
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r /tmp/requirements.txt && \
    pip uninstall -y opencv-python 2>/dev/null; \
    pip install --no-cache-dir opencv-python-headless && \
    pip install --no-cache-dir pytest && \
    rm /tmp/requirements.txt

# Copy source (bind-mounted at runtime for live editing via docker-compose)
COPY python/ /app/

CMD ["bash"]