# NovaSonic download backend — bakes the heavy deps (ffmpeg, Deno, yt-dlp, node libs) so restarts are
# instant instead of re-installing everything on every boot. Build context = ./backend.
FROM node:22-slim

# System deps: python (yt-dlp), ffmpeg (tagging/convert), curl/git/unzip (installers), ca-certs.
RUN apt-get update && apt-get install -y --no-install-recommends \
        python3 python3-pip ffmpeg curl git unzip ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# yt-dlp (nightly) + the Spotify helper tooling.
RUN pip install --break-system-packages -U --pre 'yt-dlp[default]' \
    && pip install --break-system-packages spotapi 'git+https://github.com/TzurSoffer/spotify-downloader'

# Deno — yt-dlp uses it to solve YouTube's JS signature/nsig challenge.
RUN curl -fsSL https://deno.land/install.sh | sh
ENV PATH="/root/.deno/bin:${PATH}"

# Node libs the server loads (express, kuromoji) — kept out of the app dir like the compose setup did.
WORKDIR /deps
RUN npm install express kuromoji
ENV NODE_PATH=/deps/node_modules

# App code.
WORKDIR /app
COPY . /app/

ENV PORT=3700 DATA_PATH=/data
EXPOSE 3700

# Refresh yt-dlp on start (heavy deps already baked, so this is a quick pull) — non-fatal if offline,
# the baked version still works. Keeps the "always-latest yt-dlp" behaviour of the old compose command.
CMD ["sh","-c","pip install --break-system-packages -U --pre 'yt-dlp[default]' >/dev/null 2>&1 || true; node novasonic-server.js"]