# ===== Stage 1: Build with Maven =====
FROM eclipse-temurin:21-jdk-alpine AS builder

ARG MAVEN_VERSION=3.9.9
ENV MAVEN_HOME=/opt/maven
ENV PATH=${MAVEN_HOME}/bin:${PATH}

# Install required tools quietly and set up Maven
RUN set -eux; \
    apk add --no-cache curl tar bash openssl >/dev/null; \
    echo "Downloading Maven ${MAVEN_VERSION}..."; \
    curl -fsSL "https://archive.apache.org/dist/maven/maven-3/${MAVEN_VERSION}/binaries/apache-maven-${MAVEN_VERSION}-bin.tar.gz" -o /tmp/maven.tar.gz; \
    mkdir -p /opt >/dev/null; \
    tar -xzf /tmp/maven.tar.gz -C /opt >/dev/null; \
    ln -s /opt/apache-maven-${MAVEN_VERSION} ${MAVEN_HOME}; \
    rm /tmp/maven.tar.gz; \
    echo "✅ Maven ${MAVEN_VERSION} installed successfully."

WORKDIR /build

# Copy pom.xml and prefetch dependencies silently
COPY pom.xml .
RUN mvn -B -q dependency:go-offline

# Copy source code
COPY src ./src

# Build project (skip tests, quiet mode)
RUN mvn -B -q clean package -DskipTests

# ===== Stage 2: Runtime image =====
FROM eclipse-temurin:21-jre-alpine

RUN addgroup -S spring && adduser -S spring -G spring
USER spring:spring

WORKDIR /app

COPY --from=builder /build/target/*.jar app.jar

EXPOSE 8080

# Optional: Health check (Spring Boot actuator)
HEALTHCHECK --interval=30s --timeout=5s --start-period=30s --retries=3 \
  CMD wget -qO- http://localhost:8080/actuator/health | grep '"status":"UP"' || exit 1

ENTRYPOINT ["java", "-XX:+UseContainerSupport", "-XX:MaxRAMPercentage=75.0", "-jar", "app.jar"]