#!/bin/sh
# run application with java env = 8

GG_PATH="/usr/share"
export GG_CONFIG_PATH="${HOME}"
GG_EXECUTABLE="${GG_PATH}/geogebra/geogebra"
GG_JAVA_VERSION="8"

run_gg() {
    exec "${GG_EXECUTABLE}" "$@"
    exit 0
}

# check JAVA_HOME first
if test ! -z "${JAVA_HOME}"; then
    if test "${JAVA_HOME#*$GG_JAVA_VERSION}" != "${JAVA_HOME}"; then
        # system environment variable set to required, do nothing
        echo "Using java environment from JAVA_HOME: ${JAVA_HOME}" >&2
        run_gg
    else
        # unset JAVA_HOME
        echo "Unset JAVA_HOME for this run: ${JAVA_HOME}" >&2
        unset JAVA_HOME
    fi
fi

# check current environment
if archlinux-java status | grep "default" | grep -q "${GG_JAVA_VERSION}"; then
    # required java version is set to default, do nothing
    echo "Using system enabled java environment" >&2
    run_gg
fi

# find valid environment
GG_JAVA_ENV="$(archlinux-java status | grep "${GG_JAVA_VERSION}" | awk '{ print $1 }')"
# for some env it returns like java-8-openjdk/jre
GG_JAVA_ENV="${GG_JAVA_ENV%/*}"
export PATH="/usr/lib/jvm/${GG_JAVA_ENV}/jre/bin/:${PATH}"
echo "Run with exported ${GG_JAVA_ENV}" >&2
run_gg