FROM python:3.11-slim

# Install system dependencies with security updates
RUN apt-get update && apt-get install -y \
    curl \
    && apt-get upgrade -y \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

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

# Set working directory
WORKDIR /app

# Copy requirements and install Python packages
COPY requirements.txt .
RUN pip3 install --no-cache-dir --upgrade pip && \
    pip3 install --no-cache-dir -r requirements.txt

# Copy FastAPI application
COPY app.py .

# Create logs directory and change ownership
RUN mkdir -p /app/logs && \
    chown -R appuser:appuser /app

# Set environment variables
ENV HOME=/home/appuser

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

# Start FastAPI application
CMD ["python3", "-m", "uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]