# ── Base image ────────────────────────────────────────────────────────────────
FROM node:20-slim

# ── System dependencies (needed to compile node-pty used by shellular) ────────
RUN apt-get update && \
    apt-get install -y --no-install-recommends python3 make g++ && \
    rm -rf /var/lib/apt/lists/*

# ── Pin a fixed machine-id ────────────────────────────────────────────────────
# node-machine-id reads /etc/machine-id.  By writing a fixed value here the
# shellular config seeded from SHELLULAR_HOST_ID / SHELLULAR_KEY env vars will
# always match — no re-registration needed across container restarts.
RUN echo "d8904b4d338adf83688caac869f64c0b" > /etc/machine-id && \
    mkdir -p /var/lib/dbus && \
    echo "d8904b4d338adf83688caac869f64c0b" > /var/lib/dbus/machine-id

# ── Use the built-in "node" user (UID 1000, matches HF Spaces runtime) ────────
USER node
ENV HOME=/home/node \
    PATH="/home/node/.npm-global/bin:${PATH}"

# ── Install shellular globally ────────────────────────────────────────────────
RUN npm config set prefix /home/node/.npm-global && \
    npm install -g shellular

# ── App ───────────────────────────────────────────────────────────────────────
WORKDIR /home/node/app

COPY --chown=node:node package*.json ./
RUN npm install --omit=dev

COPY --chown=node:node . .

# ── Runtime ───────────────────────────────────────────────────────────────────
EXPOSE 7860
ENV PORT=7860

CMD ["node", "app.js"]