FROM python:3.9-slim

WORKDIR /app

# Install LaTeX with comprehensive Chinese support
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    texlive-full \
    fonts-noto-cjk \
    fonts-noto-cjk-extra \
    fonts-wqy-microhei \
    fonts-wqy-zenhei \
    fonts-arphic-ukai \
    fonts-arphic-uming \
    fontconfig \
    && fc-cache -fv \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Verify that all LaTeX engines are installed and in PATH
RUN which pdflatex && which xelatex && which lualatex || (echo "LaTeX engines not found in PATH" && exit 1)

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY app.py .

# Add a debugging script to check installation
RUN echo "#!/bin/bash\necho 'Checking LaTeX engines installation:'\necho 'pdflatex:' && which pdflatex && pdflatex --version | head -1\necho 'xelatex:' && which xelatex && xelatex --version | head -1\necho 'lualatex:' && which lualatex && lualatex --version | head -1\necho 'Available fonts:'\nfc-list | grep -i 'noto\\|wqy\\|arphic' | head -10" > /app/check_latex.sh && \
    chmod +x /app/check_latex.sh

EXPOSE 8501

# Start with the debug script then run the application
CMD ["/bin/bash", "-c", "/app/check_latex.sh && streamlit run app.py --server.address=0.0.0.0"]