FROM ubuntu:22.04

ENV DEBIAN_FRONTEND=noninteractive
ENV NODE_MAJOR=20

# Install base system utilities and tools
RUN apt-get update && apt-get install -y \
    curl \
    wget \
    git \
    vim \
    nano \
    htop \
    net-tools \
    iputils-ping \
    dnsutils \
    unzip \
    zip \
    tar \
    gzip \
    bzip2 \
    xz-utils \
    build-essential \
    python3 \
    python3-pip \
    sudo \
    tmux \
    screen \
    ca-certificates \
    gnupg \
    lsb-release \
    software-properties-common \
    cgroup-tools \
    procps \
    coreutils \
    && rm -rf /var/lib/apt/lists/*

# Install Node.js 20
RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
    && apt-get install -y nodejs \
    && rm -rf /var/lib/apt/lists/*

# Create app directory
WORKDIR /app

# Copy package.json and install dependencies
COPY package.json /app/package.json
RUN npm install

# Copy application files
COPY server.js /app/server.js
COPY public /app/public
COPY start.sh /app/start.sh
RUN chmod +x /app/start.sh

# Create a user for the terminal (but we'll run as root for HF Spaces compatibility)
RUN useradd -ms /bin/bash termuser && \
    echo "termuser ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers

# Set environment variables
ENV PORT=7860
ENV SHELL=/bin/bash

EXPOSE 7860

# Start script handles resource limiting and server startup
CMD ["/app/start.sh"]