FROM python:3.9-slim

WORKDIR /app

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

# Create a non-root user
RUN useradd --create-home --shell /bin/bash appuser

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

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

# Copy application code
COPY . .

# Create cache directory with proper permissions
RUN mkdir -p /app/.cache && chown -R appuser:appuser /app

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 7860

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