# Multi-stage build for the R2 load harness. Mirrors backend/Dockerfile: a
# golang-alpine builder yields a static binary on distroless nonroot, with the
# dictionary DAWGs baked in from the scrabble-dictionary release (the harness runs
# the same solver as the backend, so it needs the same dictionary). The published
# scrabble-solver module is fetched from Gitea (GOPRIVATE), so the build stage needs
# git and network.
#
# The harness is not a contour service; build and run it ad hoc, from the repo root
# so go.work, pkg/, gateway/ and loadtest/ are in the Docker context:
#   docker build -f loadtest/Dockerfile -t scrabble-loadtest .
#   docker run --rm --network scrabble-internal -e POSTGRES_PASSWORD=... scrabble-loadtest run

# --- dictionary artifact -----------------------------------------------------
FROM alpine:3.20 AS dawg
ARG DICT_VERSION=v1.0.0
RUN apk add --no-cache curl tar
RUN mkdir -p /dawg \
 && curl -fsSL -o /tmp/dawg.tar.gz \
      "https://gitea.iliadenisov.ru/developer/scrabble-dictionary/releases/download/${DICT_VERSION}/scrabble-dawg-${DICT_VERSION}.tar.gz" \
 && tar xzf /tmp/dawg.tar.gz -C /dawg

# --- build -------------------------------------------------------------------
FROM golang:1.26.3-alpine AS build
WORKDIR /src
# git: the published solver module is fetched from Gitea directly (GOPRIVATE).
RUN apk add --no-cache git
ENV GOPRIVATE=gitea.iliadenisov.ru/*

COPY go.work go.work.sum ./
COPY pkg ./pkg
COPY gateway ./gateway
COPY loadtest ./loadtest

# Reduce the workspace to what the harness needs: loadtest + gateway (edge proto) + pkg.
RUN go work edit -dropuse=./backend -dropuse=./platform/telegram
RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -o /out/loadtest ./loadtest/cmd/loadtest

# --- runtime -----------------------------------------------------------------
FROM gcr.io/distroless/static-debian12:nonroot
COPY --from=build /out/loadtest /usr/local/bin/loadtest
COPY --from=dawg /dawg /opt/dawg
ENV LOADTEST_DAWG_DIR=/opt/dawg
ENTRYPOINT ["/usr/local/bin/loadtest"]