FROM python:3.11-slim

# Set working directory
WORKDIR /app

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

# Copy requirements first for better caching
COPY app_requirements.txt ./

# Install Python dependencies
RUN pip install --no-cache-dir -r app_requirements.txt

# Copy application code
COPY . .

# Create data directory with proper permissions
RUN mkdir -p data && chmod 755 data

# Create non-root user for security
RUN useradd -m -u 1000 appuser && chown -R appuser:appuser /app
USER appuser

# Expose port
EXPOSE 5000

# Set environment variables
ENV PYTHONPATH=/app
ENV FLASK_APP=main.py
ENV FLASK_ENV=production

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:5000/ || exit 1

# Start application
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "1", "--timeout", "120", "--keep-alive", "5", "--max-requests", "1000", "--max-requests-jitter", "100", "main:app"]