FROM golang:1.22-alpine AS builder

# Install build dependencies
RUN apk add --no-cache git ca-certificates

WORKDIR /app

# Copy go mod files
COPY go.mod go.sum* ./

# Download dependencies
RUN go mod download || true

# Copy source code
COPY main.go ./

# Build the binary
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o hmmm-monitor main.go

# Final stage - minimal image
FROM alpine:latest

RUN apk --no-cache add ca-certificates tzdata

WORKDIR /app

# Copy binary from builder
COPY --from=builder /app/hmmm-monitor .

# Run as non-root user
RUN addgroup -g 1000 monitor && \
    adduser -D -u 1000 -G monitor monitor && \
    chown -R monitor:monitor /app

USER monitor

# Set metadata
LABEL maintainer="CHORUS Ecosystem" \
      description="HMMM Traffic Monitor - Real-time libp2p message monitoring for CHORUS"

ENTRYPOINT ["./hmmm-monitor"]