# read the doc: https://huggingface.co/docs/hub/spaces-sdks-docker
# you will also find guides on how best to write your Dockerfile

FROM python:3.11-slim

# Prevent Python from writing pyc files and buffering stdout
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# Install system dependencies for matplotlib, networkx, and compilation
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libfreetype6-dev \
    libpng-dev \
    libjpeg-dev \
    libopenblas-dev \
    && rm -rf /var/lib/apt/lists/*

# Hugging Face Spaces runs containers as UID 1000.
# Create the user now to avoid permission issues at runtime.
RUN useradd -m -u 1000 user

# Set working directory
WORKDIR /app

# Copy requirements first (for Docker layer caching)
COPY --chown=user ./requirements.txt requirements.txt
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Copy the entire application with correct ownership
COPY --chown=user . /app

# Switch to non-root user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

# Expose the port Hugging Face Spaces expects
EXPOSE 7860

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