FROM python:3-bookworm

# Set working directory
WORKDIR /app

# Install runtime dependencies in a single layer and clean up apt cache
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    cvs \
    rsh-client \
    cvsps && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/*

# Copy requirements first for better layer caching
COPY requirements.txt .

# Install Python dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application
COPY . .

# Install the package
RUN pip install --no-cache-dir -e .

# Set environment variables for configuration (with defaults)
ENV CVS_URL="" \
    REPO_CHECKOUTS=/tmp/cvs_checkouts \
    CVS_MODULE="" \
    BASEPATH="" \
    FLASK_HOST=0.0.0.0 \
    FLASK_PORT=5000 \
    FLASK_DEBUG=false \
    CVS_RSH=rsh

# Expose the application port
EXPOSE 5000

# Set the entrypoint to run the application with environment variables as command-line arguments
ENTRYPOINT ["sh", "-c", "python -m cvs_proxy.app --cvs-url \"$CVS_URL\" --repo-checkouts \"$REPO_CHECKOUTS\" ${CVS_MODULE:+--cvs-module \"$CVS_MODULE\"} ${BASEPATH:+--basepath \"$BASEPATH\"} --host \"$FLASK_HOST\" --port \"$FLASK_PORT\" ${FLASK_DEBUG:+--debug}"]