# syntax=docker/dockerfile:1.6

FROM node:22-bookworm-slim AS web
WORKDIR /web
COPY web/package.json web/package-lock.json ./
RUN npm ci
COPY web/ ./
RUN npm run build

FROM golang:1.26-bookworm AS builder
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
# Overwrite the committed placeholder with the freshly-built SPA assets.
COPY --from=web /web/build ./web/build
ENV CGO_ENABLED=0
# Version stamping. release.yml passes the DERIVED version name
# (YYYY.MM.DD.HHMM) and the lane's channel; a local `docker build` falls back
# to "dev"/"local". Both are surfaced at /healthz.
#
# These are two values on purpose: the same commit built on dev and on main
# reports the same NAME and differs only in CHANNEL. Folding the channel
# into the version string would make two dev images eight weeks apart
# indistinguishable.
ARG MINSTREL_VERSION=dev
ARG MINSTREL_CHANNEL=local
RUN go build -trimpath \
    -ldflags="-s -w \
      -X 'git.fabledsword.com/bvandeusen/minstrel/internal/buildinfo.Version=${MINSTREL_VERSION}' \
      -X 'git.fabledsword.com/bvandeusen/minstrel/internal/buildinfo.Channel=${MINSTREL_CHANNEL}'" \
    -o /out/minstrel ./cmd/minstrel

FROM debian:bookworm-slim
# ffmpeg: duration probes and the exact-tier audio hash (a SHA-256 of the
# encoded audio packets, so no decode). libchromaprint-tools: fpcalc, the
# acoustic fingerprint that tells the same recording at two bitrates apart
# from two different recordings. Both are baked in at build time so a
# deployed instance never fetches either; fpcalc is shelled out
# rather than bound because CGO_ENABLED=0 above rules out cgo.
RUN apt-get update \
    && apt-get install -y --no-install-recommends ca-certificates ffmpeg libchromaprint-tools \
    && rm -rf /var/lib/apt/lists/*

RUN groupadd --system --gid 1000 minstrel \
    && useradd --system --uid 1000 --gid minstrel --shell /usr/sbin/nologin minstrel

COPY --from=builder /out/minstrel /usr/local/bin/minstrel
COPY config.example.yaml /etc/smartmusic/config.yaml

# Pre-create the data directory owned by the runtime user. Cached artifacts
# (playlist cover collages, artist art, album-cover fallbacks) all land here.
# A non-writable path at this location silently breaks every downstream
# cache, so we create + chown it once at image build. Operators mount a
# named volume on top to persist across container recreates.
RUN mkdir -p /app/data /app/client && chown -R minstrel:minstrel /app
WORKDIR /app

# In-app update channel. client/ in the build context holds
# minstrel.apk + minstrel.apk.version, which release.yml fills on every
# build (dev and tag pushes bundle their own APK, main bundles the latest
# release's); a local build has only .gitkeep + README. Endpoints return
# 404 when the APK files aren't present, so such an image degrades
# gracefully.
COPY --chown=minstrel:minstrel client/ /app/client/

USER minstrel
EXPOSE 4533
ENV MINSTREL_STORAGE_DATA_DIR=/app/data
ENTRYPOINT ["/usr/local/bin/minstrel"]
CMD ["--config", "/etc/smartmusic/config.yaml"]