# Multi-stage Dockerfile for Serena (Backend + Frontend)

# Stage 1: Build Frontend
FROM node:18-alpine AS frontend-builder

WORKDIR /app/frontend

# Copy package files
COPY frontend/package*.json ./

# Install dependencies
RUN npm ci --only=production

# Copy frontend source
COPY frontend/ ./

# Build frontend
RUN npm run build

# Stage 2: Build Backend
FROM openjdk:21-jdk-slim AS backend-builder

WORKDIR /app/backend

# Copy Gradle wrapper and build files
COPY backend/gradlew ./
COPY backend/gradle/ ./gradle/
COPY backend/build.gradle ./
COPY backend/settings.gradle ./

# Copy source code
COPY backend/src/ ./src/

# Make gradlew executable and build
RUN chmod +x gradlew
RUN ./gradlew build --no-daemon -x test

# Stage 3: Runtime
FROM openjdk:21-jre-slim

WORKDIR /app

# Install curl for health checks
RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*

# Copy built backend JAR
COPY --from=backend-builder /app/backend/build/libs/*.jar app.jar

# Copy built frontend (will be served by Spring Boot)
COPY --from=frontend-builder /app/frontend/build/ /app/static/

# Create non-root user
RUN groupadd -r serena && useradd -r -g serena serena
RUN chown -R serena:serena /app
USER serena

# Expose port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
  CMD curl -f http://localhost:8080/actuator/health || exit 1

# Run the application
ENTRYPOINT ["java", "-jar", "app.jar"]