# Lint stage — fast feedback on formatting and lint issues
# golangci/golangci-lint:v2.1.6, 2026-03-02
FROM golangci/golangci-lint@sha256:568ee1c1c53493575fa9494e280e579ac9ca865787bafe4df3023ae59ecf299b AS lint
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN make fmt-check
RUN make lint

# Build stage
# golang:1.24-alpine, 2026-02-26
FROM golang@sha256:8bee1901f1e530bfb4a7850aa7a479d17ae3a18beb6e09064ed54cfd245b7191 AS builder
WORKDIR /src
RUN apk add --no-cache git build-base make

# Force BuildKit to run the lint stage before proceeding
COPY --from=lint /src/go.sum /dev/null

COPY go.mod go.sum ./
RUN go mod download

COPY . .

RUN make test

# Build static binaries (no cgo needed at runtime — modernc.org/sqlite is pure Go)
ARG VERSION=dev
RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w -X main.Version=${VERSION}" -o /chatd ./cmd/chatd/
RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o /chat-cli ./cmd/chat-cli/

# Runtime stage
# alpine:3.21, 2026-02-26
FROM alpine@sha256:c3f8e73fdb79deaebaa2037150150191b9dcbfba68b4a46d70103204c53f4709
RUN apk add --no-cache ca-certificates \
    && addgroup -S chat && adduser -S chat -G chat
COPY --from=builder /chatd /usr/local/bin/chatd

USER chat
EXPOSE 8080
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD wget -qO- http://localhost:8080/.well-known/healthcheck.json || exit 1
ENTRYPOINT ["chatd"]