# HDH Deployment Docker Image
# Multi-stage build for production-ready HDH deployment
# Special thanks to Maria Gragera Garces for the HDH library!

FROM python:3.11-slim as builder

# Set build arguments
ARG BUILD_DATE
ARG VERSION=1.0.0

# Install system dependencies for building
RUN apt-get update && apt-get install -y \
    build-essential \
    cmake \
    git \
    pkg-config \
    libmetis-dev \
    && rm -rf /var/lib/apt/lists/*

# Set work directory
WORKDIR /app

# Copy requirements and install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir --user -r requirements.txt

# Production stage
FROM python:3.11-slim as production

# Labels for image metadata
LABEL maintainer="HDH Deployment Team" \
      description="HDH (Hybrid Dependency Hypergraph) Deployment Example" \
      version="${VERSION}" \
      build-date="${BUILD_DATE}" \
      credits="Special thanks to Maria Gragera Garces for the HDH library"

# Install runtime dependencies
RUN apt-get update && apt-get install -y \
    libmetis5 \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Create non-root user for security
RUN groupadd -r hdh && useradd -r -g hdh -m hdh

# Copy Python dependencies from builder
COPY --from=builder /root/.local /home/hdh/.local

# Set work directory
WORKDIR /app

# Copy application files
COPY . .

# Copy HDH library (assuming it's in the parent directory)
COPY ../HDH ./HDH

# Install HDH library
RUN pip install -e ./HDH

# Create output directories
RUN mkdir -p hdh_results benchmark_results qasm_examples logs \
    && chown -R hdh:hdh /app

# Switch to non-root user
USER hdh

# Set environment variables
ENV PATH="/home/hdh/.local/bin:${PATH}" \
    PYTHONPATH="/app:${PYTHONPATH}" \
    MPLBACKEND=Agg \
    HDH_OUTPUT_DIR="/app/hdh_results" \
    HDH_LOG_LEVEL=INFO

# Expose port for potential web interface
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
    CMD python -c "import hdh; print('HDH library OK')" || exit 1

# Volume for persistent data
VOLUME ["/app/hdh_results", "/app/benchmark_results", "/app/logs"]

# Default command
CMD ["python", "main.py", "--demo-mode", "--output-dir", "/app/hdh_results"]