FROM ubuntu:22.04

# Avoid prompts during installation
ENV DEBIAN_FRONTEND=noninteractive

# Update and install Ubuntu Desktop, VNC, noVNC, and missing DBUS packages
RUN apt-get update && apt-get install -y --no-install-recommends \
    bash \
    curl \
    git \
    net-tools \
    novnc \
    socat \
    x11vnc \
    xfce4 \
    xfce4-terminal \
    xvfb \
    dbus-x11 \
    websockify \
    && rm -rf /var/lib/apt/lists/*

# Setup Hugging Face Default User (UID 1000)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

WORKDIR $HOME/app

# Direct execution script entrypoint setup
RUN echo '#!/bin/bash\n\
export DISPLAY=:1\n\
Xvfb :1 -screen 0 1024x768x16 &\n\
sleep 2\n\
dbus-launch --exit-with-session xfce4-session &\n\
sleep 2\n\
x11vnc -display :1 -nopw -forever -shared -bg -rfbport 5900 &\n\
sleep 2\n\
/usr/share/novnc/utils/launch.sh --vnc localhost:5900 --listen 7860\n\
' > start.sh

RUN chmod +x start.sh

# Hugging Face Mandatory Port Expose
EXPOSE 7860

CMD ["./start.sh"]