# Backend Dockerfile
FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV PIP_NO_CACHE_DIR=1

# Set work directory
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    libpq-dev \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Install Python dependencies
COPY requirements.txt .
RUN pip install --upgrade pip && pip install -r requirements.txt

# Copy application code
COPY . .

# Create non-root user
RUN adduser --disabled-password --gecos '' appuser && chown -R appuser:appuser /app
USER appuser

# Expose port
EXPOSE 8001

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8001/health || exit 1

# Run the application
CMD ["gunicorn", "app.main:app", "-c", "gunicorn_conf.py"]