#!/bin/bash
# Spigot Installation Script
#
# Server Files: /mnt/server

mkdir -p /usr/share/man/man1

ARCH=$([[ "$(uname -m)" == "x86_64" ]] && echo "x64" || echo "aarch64")
    
function install_java() {
  echo "ARCH: ${ARCH}"
  echo "Download URl: $1"
  curl -L "$1" -o java.tar.gz
  tar xzf java.tar.gz
  export PATH=$PWD/$2/bin:$PATH
  java -version
}

function build_spigot()
{
  java -Xms$1M -jar BuildTools.jar --rev "${DL_VERSION}" || { echo -e "\n install failed! Attempted to install ${DL_VERSION} with memory of ${SERVER_MEMORY} and Java version of:"; java -version; exit 1; }
}


## Only download if a path is provided, otherwise continue.
if [ -n "${DL_PATH}" ]; then
    cd /mnt/server || { echo "Failed to change directory"; exit 1;}
    MODIFIED_DOWNLOAD=$(eval echo "$(echo "${DL_PATH}" | sed -e 's/{{/${/g' -e 's/}}/}/g')")
    echo -e "Using custom provided download link ${MODIFIED_DOWNLOAD}"
    curl -L "${MODIFIED_DOWNLOAD}" -o "${SERVER_JARFILE}"
else
    # Fetch the java version info from the spigotmc API
    if [ -z "$DL_VERSION" ] || [ "$DL_VERSION" == "latest" ]; then
        DL_VERSION="latest"
        SPIGOT_VERSION_JSON=$(curl --fail -s https://hub.spigotmc.org/versions/latest.json)
    else
        # Get requested version    
        if ! SPIGOT_VERSION_JSON=$(curl --fail -s https://hub.spigotmc.org/versions/${DL_VERSION}.json) ; then
            # Default to latest
            echo "Invalid version requested... defaulting to latest."
            DL_VERSION="latest"
            SPIGOT_VERSION_JSON=$(curl --fail -s https://hub.spigotmc.org/versions/${DL_VERSION}.json)
        fi
    fi
    JAVA_VERSION_INDEX_MIN=$(echo "$SPIGOT_VERSION_JSON" | jq -r '.javaVersions[0]')
    JAVA_VERSION_INDEX_MAX=$(echo "$SPIGOT_VERSION_JSON" | jq -r '.javaVersions[1]')


    # Spigot version table - https://hub.spigotmc.org/stash/projects/SPIGOT/repos/buildtools/browse/src/main/java/org/spigotmc/builder/JavaVersion.java
    # Install the minimum supported java version
    if  [ 52 -ge "$JAVA_VERSION_INDEX_MIN" ] && [ 52 -le "$JAVA_VERSION_INDEX_MAX" ]; then
        install_java "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u312-b07/OpenJDK8U-jdk_${ARCH}_linux_hotspot_8u312b07.tar.gz" jdk8u312-b07
    elif [ 60 -ge "$JAVA_VERSION_INDEX_MIN" ] && [ 60 -le "$JAVA_VERSION_INDEX_MAX" ]; then
        install_java "https://github.com/adoptium/temurin16-binaries/releases/download/jdk-16.0.2%2B7/OpenJDK16U-jdk_${ARCH}_linux_hotspot_16.0.2_7.tar.gz" jdk-16.0.2+7
    elif [ 61 -ge "$JAVA_VERSION_INDEX_MIN" ] && [ 61 -le "$JAVA_VERSION_INDEX_MAX" ]; then
        install_java "https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.1%2B12/OpenJDK17U-jdk_${ARCH}_linux_hotspot_17.0.1_12.tar.gz" jdk-17.0.1+12
    elif [ 65 -ge "$JAVA_VERSION_INDEX_MIN" ] && [ 65 -le "$JAVA_VERSION_INDEX_MAX" ]; then
        install_java "https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.3%2B9/OpenJDK21U-jdk_${ARCH}_linux_hotspot_21.0.3_9.tar.gz" jdk-21.0.3+9
    elif [ 67 -ge "$JAVA_VERSION_INDEX_MIN" ] && [ 67 -le "$JAVA_VERSION_INDEX_MAX" ]; then
        install_java "https://github.com/adoptium/temurin23-binaries/releases/download/jdk-23.0.1%2B11/OpenJDK23U-jdk_${ARCH}_linux_hotspot_23.0.1_11.tar.gz" jdk-23.0.1+11
    else
        echo "Unsupported Java version required"
        exit 1
    fi

    mkdir -p /srv/
    cd /srv/ || { echo "Failed to change directory"; exit 1;}
    curl -L https://hub.spigotmc.org/jenkins/job/BuildTools/lastSuccessfulBuild/artifact/target/BuildTools.jar -o BuildTools.jar

    # Force the minimum Wings install container memory should someone provide less or 0 as it will break the Java build process
    if [ "$SERVER_MEMORY" -lt 1024 ]; then
        echo -e "Do not use 0 for memory with Java applications. Defaulting to 1024MB.\n WARNING! 1024MB might not be enough to build 1.17+ releases."
        SERVER_MEMORY=1024            
    fi
    build_spigot "${SERVER_MEMORY}"
    mv spigot-*.jar "/mnt/server/${SERVER_JARFILE}"
fi


## install end
echo "-----------------------------------------"
echo "Installation completed..."
echo "-----------------------------------------"