FROM golang:1.25-alpine AS builder-base

WORKDIR /app

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

COPY . .

# Collector build (no CGO needed)
FROM builder-base AS builder-collector

RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /optimiser ./cmd/collector

# Receiver build
FROM builder-base AS builder-receiver

RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /metrics-receiver ./cmd/receiver

# Collector image
FROM alpine:3.19 AS collector

COPY --from=builder-collector /optimiser /usr/local/bin/optimiser

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

# Receiver image
FROM alpine:3.19 AS receiver

COPY --from=builder-receiver /metrics-receiver /usr/local/bin/metrics-receiver

EXPOSE 8080

ENTRYPOINT ["/usr/local/bin/metrics-receiver"]