FROM python:3.9-slim

WORKDIR /code

# Install system dependencies for WeasyPrint
RUN apt-get update && apt-get install -y \
    build-essential \
    python3-cffi \
    python3-brotli \
    libpango-1.0-0 \
    libharfbuzz0b \
    libpangoft2-1.0-0 \
    libcairo2 \
    && rm -rf /var/lib/apt/lists/*

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

# Copy application code
COPY . .

# Create necessary directories
RUN mkdir -p static/plots

# Set environment variables
ENV PYTHONUNBUFFERED=1
ENV PORT=7860

# Expose the port
EXPOSE 7860

# Run the application
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "1", "--threads", "8", "--timeout", "0", "app:app"]