FROM --platform=$BUILDPLATFORM maven:3.8.5-eclipse-temurin-17 AS builder

WORKDIR /workdir/server

# Copy only pom.xml first for better layer caching
COPY pom.xml /workdir/server/pom.xml

# Download dependencies with optimization flags
RUN mvn dependency:resolve dependency:resolve-plugins -B -T 1C

# Copy source code
COPY src /workdir/server/src

# Build the application
RUN mvn package -B -T 1C -DskipTests -Dmaven.javadoc.skip=true

# Verify the JAR was created
RUN ls -la target/

# Runtime stage
FROM eclipse-temurin:17-jre-focal

EXPOSE 8080
VOLUME /tmp

# Copy the JAR file from builder
COPY --from=builder /workdir/server/target/*.jar /app/app.jar

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