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

# Build-Dependencies (bash für das Cache-Version-Skript + optipng/jpegoptim für Bildkompression)
RUN apk add --no-cache git bash sed optipng jpegoptim

WORKDIR /app

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

# Source Code kopieren
COPY . .

# Assets generieren (falls nicht vorhanden)
RUN if [ ! -f cmd/client/web/assets/assets.json ]; then \
        echo "🔨 Generiere Assets..."; \
        go run ./cmd/builder; \
    else \
        echo "✅ Assets bereits vorhanden"; \
    fi

# Cache-Version aktualisieren (für Browser-Cache-Busting)
RUN chmod +x scripts/cache-version.sh && \
    ./scripts/cache-version.sh

# ARG für den Build-Modus (z.B. "main" für Produktion)
ARG BUILD_MODE=dev

# Bilder komprimieren (NUR für BUILD_MODE=main)
# Spart Zeit bei Feature-Branch Builds
RUN if [ "$BUILD_MODE" = "main" ]; then \
        echo "🗜️ PRODUCTION MODE: Komprimiere Bilder..." && \
        find cmd/client/web -type f -name "*.png" -exec optipng -o3 -strip all {} \; && \
        find cmd/client/web -type f \( -name "*.jpg" -o -name "*.jpeg" \) -exec jpegoptim -m85 --strip-all --all-progressive --preserve --totals {} \; && \
        echo "✅ Bildkompression abgeschlossen"; \
    else \
        echo "⚡ DEV/FEATURE MODE: Bildkompression übersprungen"; \
    fi

# 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 (mit Strip-Flags: -w entfernt Debug-Info, -s entfernt Symbol-Tabelle)
RUN GOOS=js GOARCH=wasm go build -ldflags="-w -s" -o cmd/client/web/main.wasm ./cmd/client

# Unnötige Audio-Dateien entfernen (game.wav = 40MB, nur game.mp3 wird verwendet)
RUN rm -f cmd/client/web/assets/game.wav

# 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"]