FROM python:3.10-slim

# Set environment variables
ENV PYTHONUNBUFFERED=1 \
    DEBIAN_FRONTEND=noninteractive \
    REQUESTS_TIMEOUT=30

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

# Set working directory
WORKDIR /app

# Copy requirements first to leverage Docker cache
COPY requirements.txt .

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

# Copy application code
COPY . .

# Set up DNS configuration
RUN echo "nameserver 8.8.8.8" > /etc/resolv.conf && \
    echo "nameserver 8.8.4.4" >> /etc/resolv.conf

# Expose port
EXPOSE 7860

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

# Command to run the application
CMD ["python", "app.py"]