# syntax=docker/dockerfile:1
#
# Hardened, browsable Tor Browser for Hugging Face Spaces (Docker SDK).
# Architecture:
#   tor (system daemon, multi-bridge PTs) -> Firefox/Tor-Browser profile (JS off, locked prefs)
#   -> Xvfb -> x11vnc -> websockify/noVNC -> nginx (basic auth, WS proxy) -> HF public URL (port 7860)
#
# IMPORTANT: HF Spaces runs Docker containers as UID 1000 at runtime regardless
# of root-looking build steps (see https://huggingface.co/docs/hub/spaces-sdks-docker
# "The container runs with user ID 1000"). There is no root, no sudo, no gosu at
# runtime here on purpose — every directory the app needs to write to is created
# and chowned to `user` (uid 1000) at BUILD time (when we genuinely are root),
# and every process just runs directly as `user`.

FROM debian:bookworm-slim

ARG TORBROWSER_VERSION=15.0.17
ARG TZ=Etc/UTC
ENV DEBIAN_FRONTEND=noninteractive \
    TZ=${TZ} \
    HOME=/home/user \
    DISPLAY=:99 \
    SCREEN_GEOMETRY=1280x800x24

# ---- base packages -----------------------------------------------------
# (gosu dropped: nothing switches users at runtime anymore)
RUN apt-get update && apt-get install -y --no-install-recommends \
        tor obfs4proxy snowflake-client \
        xvfb x11vnc novnc websockify \
        nginx-light apache2-utils \
        curl wget gnupg ca-certificates bzip2 xz-utils netcat-openbsd xxd \
        fonts-liberation libgtk-3-0 libdbus-glib-1-2 libasound2 dbus-x11 \
        libx11-xcb1 libxtst6 libnss3 libxss1 x11-utils supervisor \
    && rm -rf /var/lib/apt/lists/*

# ---- non-root user (uid 1000, matching what HF Spaces runs the container as) --
RUN useradd -m -u 1000 -d /home/user -s /bin/bash user

# ---- fetch + verify Tor Browser (Browser/ component only; we run our own tor) ----
# NOTE: at build time, check https://www.torproject.org/download/ for the current
# version and update TORBROWSER_VERSION. This step verifies the GPG signature
# against the Tor Browser Developers signing key before extracting anything.
WORKDIR /opt
RUN set -eux; \
    ARCH_URL="https://www.torproject.org/dist/torbrowser/${TORBROWSER_VERSION}/tor-browser-linux-x86_64-${TORBROWSER_VERSION}.tar.xz"; \
    wget -q --timeout=30 --tries=3 "${ARCH_URL}" -O tb.tar.xz; \
    wget -q --timeout=30 --tries=3 "${ARCH_URL}.asc" -O tb.tar.xz.asc; \
    curl -sS --connect-timeout 10 --max-time 30 --retry 3 \
        https://openpgpkey.torproject.org/.well-known/openpgpkey/torproject.org/hu/kounek7zrdx745qydx6p59t9mqjpuhdf \
        | gpg --import - || true; \
    gpg --list-keys 4E2C6E8793298290 || \
        gpg --keyserver hkps://keys.openpgp.org --recv-keys \
            --keyserver-options timeout=20 EF6E286DDA85EA2A4BA7DE684E2C6E8793298290; \
    gpg --batch --verify tb.tar.xz.asc tb.tar.xz; \
    tar -xJf tb.tar.xz; \
    rm -f tb.tar.xz tb.tar.xz.asc; \
    chown -R user:user /opt/tor-browser

# ---- config files --------------------------------------------------------
COPY torrc /etc/tor/torrc
COPY nginx.conf /etc/nginx/nginx.conf
COPY firefox-prefs/autoconfig.js /opt/tor-browser/Browser/defaults/pref/autoconfig.js
COPY firefox-prefs/tor-browser.cfg /opt/tor-browser/Browser/tor-browser.cfg
COPY entrypoint.sh /entrypoint.sh
COPY bootstrap-test.sh /usr/local/bin/bootstrap-test.sh
COPY healthcheck.sh /usr/local/bin/healthcheck.sh
COPY idle-watcher.sh /usr/local/bin/idle-watcher.sh

# ---- fix every permission the app will ever need, while we still have root ----
RUN chmod +x /entrypoint.sh /usr/local/bin/bootstrap-test.sh /usr/local/bin/healthcheck.sh /usr/local/bin/idle-watcher.sh && \
    mkdir -p /var/lib/tor /var/log/tor && \
    chown -R user:user /var/lib/tor /var/log/tor /etc/tor && \
    chmod 700 /var/lib/tor && \
    mkdir -p /var/www /var/www/wait /var/www/error && \
    chown -R user:user /var/www /var/log/nginx /var/lib/nginx /etc/nginx && \
    touch /etc/nginx/.htpasswd && \
    chown user:user /etc/nginx/.htpasswd && \
    mkdir -p /tmp/tb-downloads /dev/shm && \
    chown user:user /tmp/tb-downloads

# Firefox profile lives in tmpfs at runtime (see entrypoint.sh) -> nothing persists to disk.
# /dev/shm and /tmp are already world-writable (sticky 1777), no chown needed there.

USER user
WORKDIR /home/user

EXPOSE 7860

HEALTHCHECK --interval=30s --timeout=10s --start-period=90s --retries=3 \
    CMD /usr/local/bin/healthcheck.sh

ENTRYPOINT ["/entrypoint.sh"]