# UI build stage
ARG TARGETOS
ARG TARGETARCH
FROM node:alpine AS ui-builder

WORKDIR /app

COPY otel-ui/ .

RUN npm install && npm run build

# Go build stage
FROM --platform=$BUILDPLATFORM golang:1.25-alpine AS go-builder

WORKDIR /app

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

COPY cmd/ ./cmd
COPY internal/ ./internal

# Copy built UI dist
COPY --from=ui-builder /app/dist ./otel-ui/dist

RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -a -installsuffix cgo -o /go-otel ./cmd/server

# Final stage
FROM alpine:latest

RUN apk --no-cache add ca-certificates

# Create non-root user
RUN addgroup -S appgroup && adduser -S appuser -G appgroup

WORKDIR /home/appuser/

COPY --from=go-builder /go-otel .
COPY --from=go-builder /app/otel-ui/dist ./dist

# Ensure the appuser owns the files
RUN chown -R appuser:appgroup /home/appuser/

USER appuser

EXPOSE 8080

CMD ["./go-otel"]