# Dragon Fork datarhei Core image (M2 + WebRTC egress).
#
# Builds the real root Core binary — the one that replaces the M1 PoC
# in production. FFmpeg is baked in so restream processes can run the
# RTP output legs emitted by the WebRTC subsystem.
#
# Two-stage:
#   1. builder: compile a static Go binary (CGO off — no dynamic libs)
#   2. runtime: alpine with ffmpeg for the subprocess path
#
# Usage via compose:
#   docker compose -f deploy/truenas/core/docker-compose.yml up -d --build
#
# The compose file drives configuration via CORE_* env vars — see
# README.md in this directory.

# ---- builder ----
# go.mod requires go 1.24; pinning the image keeps Docker's toolchain
# download off the hot path and makes the build reproducible.
FROM golang:1.24-alpine3.20 AS builder

WORKDIR /src
RUN apk add --no-cache git make

COPY . .

ENV CGO_ENABLED=0 GOOS=linux GOARCH=amd64
RUN make release && make import && make ffmigrate

# ---- ui-builder ----
# Builds the official Datarhei Restreamer UI (React 18 + MUI). Pinned
# to a specific tag so reproducible. PUBLIC_URL=./ makes asset
# references relative — the bundle then works when served from / or
# any subdirectory under Core's static-disk filesystem.
#
# Pulling from the public github mirror keeps the Forgejo runner's
# network footprint small; no auth required for clone.
FROM node:21-alpine3.20 AS ui-builder
ARG RESTREAMER_UI_REF=v1.14.0
RUN apk add --no-cache git
WORKDIR /ui

# 1. Pull upstream restreamer-ui at the pinned tag.
RUN git clone --depth=1 --branch ${RESTREAMER_UI_REF} \
    https://github.com/datarhei/restreamer-ui.git .

# 2. Layer Wild Dragon overlays on top of the upstream tree before the
#    build runs. apply-overlay.sh does the rsync + targeted seds; see
#    deploy/truenas/core/ui-overlay/apply-overlay.sh for the contract.
COPY deploy/truenas/core/ui-overlay /overlay
RUN OVERLAY=/overlay UI=/ui /overlay/apply-overlay.sh

# 3. Install + build. PUBLIC_URL=./ keeps asset references relative so
#    the bundle is portable across mount paths.
RUN yarn install --frozen-lockfile --network-timeout 600000 \
 && PUBLIC_URL="./" GENERATE_SOURCEMAP=false yarn build

# ---- runtime ----
# Alpine with ffmpeg (Core shells out to it for every restream process).
# Scratch isn't an option here because the process manager needs ffmpeg
# on PATH.
FROM alpine:3.20 AS runtime

RUN apk add --no-cache ffmpeg tini ca-certificates

# make release's `-o core` lands the binary inside the core/ Go
# package directory (Go cannot overwrite a directory with a file, so
# it places the output file _inside_ it). The `import` and `ffmigrate`
# Makefile targets cd into app/<name> and write the binary back up to
# the repo root with a relative path, so those end up at /src/import
# and /src/ffmigrate.
COPY --from=builder /src/core/core /core/bin/core
COPY --from=builder /src/import    /core/bin/import
COPY --from=builder /src/ffmigrate /core/bin/ffmigrate
COPY --from=builder /src/mime.types /core/mime.types
COPY --from=builder /src/run.sh    /core/bin/run.sh

# Static content for /core/data, seeded on first boot by seed-data.sh.
# Stacking order:
#   1. Restreamer UI bundle (the React SPA — gives us index.html)
#   2. Dragon Fork extras (whep-player.html, etc.) — won't overwrite
#      the UI's index.html (seed-data is no-clobber).
#
# The result: GET / serves the official Restreamer dashboard, and
# /whep-player.html serves the standalone WHEP smoke player.
COPY --from=ui-builder /ui/build/                         /core/static/
COPY --from=builder    /src/deploy/truenas/core/static/   /core/static/
COPY --from=builder    /src/deploy/truenas/core/seed-data.sh /core/bin/seed-data.sh

RUN chmod +x /core/bin/seed-data.sh && mkdir -p /core/config /core/data

ENV CORE_CONFIGFILE=/core/config/config.json
ENV CORE_STORAGE_DISK_DIR=/core/data
ENV CORE_DB_DIR=/core/config

VOLUME ["/core/data", "/core/config"]
EXPOSE 8080/tcp

# Seed /core/data on first boot, then exec the upstream run.sh which
# handles imports, ffmpeg migrations, and the core binary. tini reaps
# child PIDs and forwards signals.
ENTRYPOINT ["/sbin/tini", "--", "/bin/sh", "-c", "/core/bin/seed-data.sh && exec /core/bin/run.sh"]
WORKDIR /core
