# Frontend Build Stage
FROM node:20-alpine AS frontend-build
WORKDIR /app/frontend

# Nur package files zuerst kopieren für besseres Caching
COPY src/frontend/package*.json ./
RUN npm ci --only=production

# Frontend Source Code kopieren
COPY src/frontend/ ./

# Frontend bauen
RUN npm run build

# Backend Build Stage
FROM maven:3.9-eclipse-temurin-23 AS backend-build
WORKDIR /app

# Nur pom.xml zuerst für besseres Dependency Caching
COPY pom.xml ./
RUN mvn dependency:go-offline -B

# Backend Source Code kopieren (ohne frontend)
COPY src ./src

# Frontend Build Results kopieren
COPY --from=frontend-build /app/frontend/dist ./src/main/resources/static

# Build mit optimierten Maven Settings
RUN mvn clean package -DskipTests -B -T 1C

# Runtime Stage - Optimiert
FROM eclipse-temurin:23-jre-alpine

# Sicherheit: Non-root User
RUN addgroup -g 1001 -S appgroup && \
    adduser -u 1001 -S appuser -G appgroup

WORKDIR /app

# App kopieren
COPY --from=backend-build --chown=appuser:appgroup /app/target/*.jar app.jar

# Wechsel zu non-root user
USER appuser

# Health check hinzufügen (optional, passe den Pfad an)
HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8080/actuator/health || exit 1

EXPOSE 8080

# JVM Memory Optimierungen
ENV JAVA_OPTS="-XX:+UseContainerSupport -XX:MaxRAMPercentage=75.0 -XX:+ExitOnOutOfMemoryError"

ENTRYPOINT ["sh", "-c", "java $JAVA_OPTS -jar app.jar"]