FROM python:3.11-slim

# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user
RUN groupadd --gid 1000 appgroup && \
    useradd --uid 1000 --gid appgroup --shell /bin/bash --create-home appuser

WORKDIR /home/appuser

# Copy requirements and install dependencies
COPY --chown=appuser:appgroup requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy backend code
COPY --chown=appuser:appgroup . .

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8000/docs || exit 1

# Run uvicorn
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]