FROM python:3.10-slim

# Set non-interactive mode and default timezone to avoid hangs during package installation
ENV DEBIAN_FRONTEND=noninteractive
ENV TZ=UTC
ENV PYTHONUNBUFFERED=1
ENV SYSTEM=spaces

# Install system dependencies
RUN apt-get update && apt-get install -y \
    python3-pip \
    git \
    git-lfs \
    texlive-latex-base \
    texlive-fonts-recommended \
    texlive-latex-extra \
    libreoffice \
    && git lfs install \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Create /data/uploads and set permissions as root
RUN mkdir -p /data/uploads && chmod -R 777 /data/uploads && chmod -R 777 /tmp

# Create non-root user (HF default)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH \
    PYTHONPATH=${HOME}/app

WORKDIR ${HOME}/app

# Copy application files
COPY --chown=user . ${HOME}/app

# Install Python dependencies
RUN python3 -m pip install --user --no-cache-dir packaging==24.1
RUN python3 -m pip install --user --no-cache-dir -r requirements.txt

# Expose Flask port (required for Hugging Face Spaces)
EXPOSE 7860

# Run the Flask app
CMD ["python3", "app.py"]