# Use Python 3.11 slim image
FROM python:3.11-slim

# Set working directory
WORKDIR /app

# Install system dependencies for WeasyPrint and PDF generation
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    libpango-1.0-0 \
    libpangoft2-1.0-0 \
    libharfbuzz-subset0 \
    libffi-dev \
    libgdk-pixbuf-2.0-0 \
    libcairo2 \
    shared-mime-info \
    && rm -rf /var/lib/apt/lists/*

# 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 necessary directories
RUN mkdir -p /tmp/generated_docs

# Set environment variables
ENV FLASK_APP=app.py
ENV PYTHONUNBUFFERED=1
ENV PORT=7860

# Expose port (Hugging Face uses 7860 by default)
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD python -c "import requests; requests.get('http://localhost:7860/health')"

# Run the application with gunicorn
CMD gunicorn --bind 0.0.0.0:7860 --workers 2 --threads 4 --timeout 120 app:app