FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONIOENCODING=utf-8

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

# Create app user and directory
RUN useradd --create-home --shell /bin/bash app
WORKDIR /app

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

# Copy application code
COPY . .

# Set ownership
RUN chown -R app:app /app

# Switch to app user
USER app

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8080/health || exit 1

# Expose port
EXPOSE 8080

# Run the application
CMD ["python", "nfoguard.py"]