# Build from OpenJDK image
FROM "${JDK_IMAGE:-localhost/minecraft-jdk}":"${JDK_TAG:-latest}" as build

# Minecraft version
ARG VERSION=latest

# Defaults to building Spigot over CraftBukkit
ARG SPIGOT=true

# SpigotMC BuildTools URL
ARG BASE_URL="https://hub.spigotmc.org/jenkins/job/BuildTools/"
ARG ARTIFACT_PATH="lastSuccessfulBuild/artifact/target/BuildTools.jar"

# Build in common container location
WORKDIR /build

# Download and build Spigot using BuildTools
RUN set -ux && \
# Grab latest version if not specified
  if [ "$VERSION" = "latest" ]; then \
    VERSION="$( \
      curl -s https://launchermeta.mojang.com/mc/game/version_manifest.json \
        | jq -r '.latest.release' \
    )"; \
  fi && \
  # Download BuildTools.jar
  curl -s -o BuildTools.jar "${BASE_URL}${ARTIFACT_PATH}" && \
  # Build Craftbukkit if SPIGOT is false
  case "$SPIGOT" in \
    true) \
      BUILD_TYPE='SPIGOT' ;; \
    false) \
      BUILD_TYPE='CRAFTBUKKIT' ;; \
    *) \
      echo "ERROR: Invalid value for SPIGOT. Set to 'true' or 'false'"; \
      exit 1 ;; \
  esac && \
  # Run BuildTools to build specified version
  java -jar BuildTools.jar --rev "$VERSION" --compile "$BUILD_TYPE" && \
  ln -s \
    "$(echo $BUILD_TYPE | tr '[:upper:]' '[:lower:]')-${VERSION}.jar" \
    "server.jar"

# Use OpenJRE image for runtime
FROM "${JRE_IMAGE:-localhost/minecraft-jre}":"${JRE_TAG:-latest}" as runtime

# Run as Minecraft user
USER minecraft
WORKDIR /app

# Copy the built bukkit jar from the build stage
COPY --from=build /build/server.jar /app/server.jar

# Generate initial settings
RUN java -jar server.jar --initSettings --nogui

# Back to root to copy the entrypoint in
USER root
WORKDIR /app

# Copy in entrypoint script
COPY ../entrypoint.sh /usr/local/bin/entrypoint.sh
RUN chmod +x /usr/local/bin/entrypoint.sh

# Run app as minecraft user
USER minecraft
WORKDIR /app

# Expose port and run entrypoint script
EXPOSE 25565
ENTRYPOINT ["entrypoint.sh"]