# =======================
# Builder stage
# =======================
FROM maven:3.8.5-eclipse-temurin-17 AS builder

WORKDIR /workdir/server

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

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

# Copy source code
COPY src ./src

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

# Verify the JAR was created and rename it to a consistent name
RUN ls -la target/ && \
    mv target/*.jar target/app.jar

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

# Expose port
EXPOSE 8080

# Create app and uploads directories
RUN mkdir -p /app && \
    mkdir -p /app/uploads && \
    chmod 755 /app/uploads

# Set working directory
WORKDIR /app

# Copy the JAR with a consistent name
COPY --from=builder /workdir/server/target/app.jar /app/app.jar

# Create volume for uploads
VOLUME ["/app/uploads"]

# Use exec form of ENTRYPOINT (not shell form) for proper signal handling
# and environment variable passing
ENTRYPOINT ["java", "-jar", "/app/app.jar"]