# syntax=docker/dockerfile:1.7

# Build context is the workspace root (galaxy/), not the gateway/
# subdirectory, because the gateway module pulls galaxy/{backend,model,
# redisconn,transcoder} through the go.work replace directives. Build
# with:
#
#     docker build -t galaxy/gateway:integration -f gateway/Dockerfile .

FROM golang:1.26.2-alpine AS builder
WORKDIR /src
ENV CGO_ENABLED=0 GOFLAGS=-trimpath

# galaxy/backend is needed only for proto/push/v1 (gRPC client of the
# backend Push.SubscribePush stream). Its other packages are not
# reachable from the gateway main and are not compiled.
COPY pkg/cronutil/   ./pkg/cronutil/
COPY pkg/error/      ./pkg/error/
COPY pkg/geoip/      ./pkg/geoip/
COPY pkg/model/      ./pkg/model/
COPY pkg/postgres/   ./pkg/postgres/
COPY pkg/redisconn/  ./pkg/redisconn/
COPY pkg/schema/     ./pkg/schema/
COPY pkg/transcoder/ ./pkg/transcoder/
COPY pkg/util/       ./pkg/util/
COPY backend/        ./backend/
COPY gateway/        ./gateway/

RUN <<'EOF' cat > go.work
go 1.26.2

use (
	./backend
	./gateway
	./pkg/cronutil
	./pkg/error
	./pkg/geoip
	./pkg/model
	./pkg/postgres
	./pkg/redisconn
	./pkg/schema
	./pkg/transcoder
	./pkg/util
)

replace (
	galaxy/cronutil v0.0.0   => ./pkg/cronutil
	galaxy/error v0.0.0      => ./pkg/error
	galaxy/geoip v0.0.0      => ./pkg/geoip
	galaxy/model v0.0.0      => ./pkg/model
	galaxy/postgres v0.0.0   => ./pkg/postgres
	galaxy/redisconn v0.0.0  => ./pkg/redisconn
	galaxy/schema v0.0.0     => ./pkg/schema
	galaxy/transcoder v0.0.0 => ./pkg/transcoder
	galaxy/util v0.0.0       => ./pkg/util
)
EOF

RUN --mount=type=cache,target=/root/.cache/go-build \
    --mount=type=cache,target=/go/pkg/mod \
    go build -ldflags="-s -w" -o /out/gateway ./gateway/cmd/gateway

FROM gcr.io/distroless/static-debian12:nonroot AS runtime

LABEL org.opencontainers.image.title="galaxy-gateway"

EXPOSE 8080
EXPOSE 9100
USER nonroot:nonroot

COPY --from=builder /out/gateway /usr/local/bin/gateway

ENTRYPOINT ["/usr/local/bin/gateway"]