# Stage 1: Builder
FROM golang:1.25.5-alpine AS builder

# Build-Dependencies
RUN apk add --no-cache git

WORKDIR /app

# Dependencies cachen
COPY go.mod go.sum ./
RUN go mod download

# Source Code kopieren
COPY . .

# Server binary bauen
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -ldflags="-w -s" -o server ./cmd/server

# WASM Client bauen
RUN GOOS=js GOARCH=wasm go build -o cmd/client/web/main.wasm ./cmd/client

# Stage 2: Production Image
FROM alpine:latest

RUN apk --no-cache add ca-certificates curl tzdata && \
    addgroup -g 1000 appuser && \
    adduser -D -u 1000 -G appuser appuser

WORKDIR /app

# Binary und Web-Dateien vom Builder kopieren
COPY --from=builder /app/server .
COPY --from=builder /app/cmd/client/web ./cmd/client/web

# User wechseln
USER appuser

# Port für HTTP/WebSocket
EXPOSE 8080

# Healthcheck
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD curl -f http://localhost:8080/health || exit 1

CMD ["./server"]