#!/bin/sh

# There's no need to run as root, so don't allow it, for security reasons
if [ "$USER" = "root" ]; then
        echo "Please su to non-root user before running"
        exit
fi

# If docker is passed, then we want to change the behavior of the script
# to change the log suppression
if [ "$1" = "docker" ]; then
        DOCKER=true
fi



# Validate Java is installed and the minimum version is available
MIN_JAVA_VER='11'

if command -v java > /dev/null 2>&1; then
    # Example: openjdk version "11.0.6" 2020-01-14
    version=$(java -version 2>&1 | awk -F '"' '/version/ {print $2}' | cut -d'.' -f1,2)
    if echo "${version}" "${MIN_JAVA_VER}" | awk '{ if ($2 > 0 && $1 >= $2) exit 0; else exit 1}'; then
        echo 'Passed Java version check'
    else
        echo "Please upgrade your Java to version ${MIN_JAVA_VER} or greater"
        exit 1
    fi
else
  echo "Java is not available, please install Java ${MIN_JAVA_VER} or greater"
  exit 1
fi

# No qortal.jar but we have a Maven built one?
# Be helpful and copy across to correct location
if [ ! -e qortal.jar -a -f target/qortal*.jar ]; then
        echo "Copying Maven-built Qortal JAR to correct pathname"
        cp target/qortal*.jar qortal.jar
fi

# Limits Java JVM stack size and maximum heap usage.
# Comment out for bigger systems, e.g. non-routers
# or when API documentation is enabled
# JVM_MEMORY_ARGS="-Xss256k -Xmx128m"

# Although java.net.preferIPv4Stack is supposed to be false
# by default in Java 11, on some platforms (e.g. FreeBSD 12),
# it is overridden to be true by default. Hence we explicitly
# set it to false to obtain desired behaviour.

if [ "$DOCKER" = true ]; then
        java -Djava.net.preferIPv4Stack=false $JVM_MEMORY_ARGS -jar qortal.jar
else
  nohup nice -n 20 java \
          -Djava.net.preferIPv4Stack=false \
          ${JVM_MEMORY_ARGS} \
          -jar qortal.jar
fi


# Save backgrounded process's PID
# echo $! > run.pid
# echo qortal running as pid $!