# Stage 1: Build frontend with Node.js
FROM node:22-alpine AS frontend
WORKDIR /frontend
COPY frontend/package.json frontend/package-lock.json ./
RUN npm ci
COPY frontend/ ./
RUN npm run build -- --configuration production

# Stage 2: Build backend with Gradle
FROM eclipse-temurin:21-jdk AS builder
WORKDIR /app
COPY backend/build.gradle backend/settings.gradle ./
COPY backend/gradlew ./
COPY backend/gradle/ gradle/
COPY backend/src/ src/
# Copy built frontend assets into Spring static resources
COPY --from=frontend /frontend/dist/frontend/browser src/main/resources/static/
RUN chmod +x gradlew && SKIP_FRONTEND=true ./gradlew bootJar --no-daemon

# Stage 3: Runtime image
FROM eclipse-temurin:21-jre
WORKDIR /app
COPY --from=builder /app/build/libs/backend-0.0.1-SNAPSHOT.jar app.jar

RUN adduser --disabled-password --gecos "" appuser && \
    chown appuser:appuser /app
USER appuser

EXPOSE 8080
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD wget -q --spider http://localhost:8080/api/system/metrics || exit 1

ENTRYPOINT ["java", "-jar", "app.jar"]