#!/usr/bin/env bash
# Shared launcher for MacOS and Linux
# Parameters -- if any -- are passed on to the app

# Halt on first error
set -e

# Configured by ant at build time
JAVA_MIN="${javac.target}"
LAUNCH_OPTS="${launch.opts}"
ABOUT_TITLE="${project.name}"
PROPS_FILE="${project.filename}"

# Get working directory
DIR=$(cd "$(dirname "$0")" && pwd)
pushd "$DIR" &> /dev/null

# Console colors
RED="\\x1B[1;31m";GREEN="\\x1B[1;32m";YELLOW="\\x1B[1;33m";PLAIN="\\x1B[0m"

# Statuses
SUCCESS="   [${GREEN}success${PLAIN}]"
FAILURE="   [${RED}failure${PLAIN}]"
WARNING="   [${YELLOW}warning${PLAIN}]"

echo "Looking for Java..."

# Honor JAVA_HOME
if [ -n "$JAVA_HOME" ]; then
    echo -e "$WARNING JAVA_HOME was detected, using $JAVA_HOME..."
    PATH="$JAVA_HOME/bin:$PATH"
fi

# Check for bundled JRE
if [ -d ./jre ]; then
    echo -e "$SUCCESS A bundled runtime was found.  Using..."
    PATH="$(pwd)/jre/bin:$PATH"
    export PATH
fi

if [[ "$OSTYPE" == "darwin"* ]]; then
    ICON_PATH="$DIR/Contents/Resources/apple-icon.icns"
    MAC_PRIMARY="/usr/libexec/java_home"
    MAC_FALLACK="/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin"
    echo "Trying $MAC_PRIMARY..."
    if "$MAC_PRIMARY" -v $JAVA_MIN+ &>/dev/null; then
        echo -e "$SUCCESS Using \"$MAC_PRIMARY -v $JAVA_MIN+ --exec\" to launch $ABOUT_TITLE"
        java() {
            "$MAC_PRIMARY" -v $JAVA_MIN+ --exec java "$@"
        }
    elif [ -d "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin" ]; then
        echo -e "$WARNING No luck using $MAC_PRIMARY"
        echo "Trying $MAC_FALLACK..."
        java() {
            "$MAC_FALLACK/java" "$@"
        }
    fi
else
    export PATH="$PATH:/usr/java/latest/bin/"
fi

# Make sure Java version is sufficient
echo "Verifying the Java version is $JAVA_MIN+..."
curver=$(java -version 2>&1 | grep -i version | awk -F"\"" '{ print $2 }' | awk -F"." '{ print $1 "." $2 }')
minver="$JAVA_MIN"
if [ -z "$curver" ]; then
    curver="0.0"
fi
desired=$(echo -e "$minver\n$curver")
actual=$(echo "$desired" |sort -t '.' -k 1,1 -k 2,2 -n)
if [ "$desired" != "$actual" ]; then
    echo -e "$FAILURE Please install Java $JAVA_MIN or higher to continue"
    exit 1
else
    echo -e "$SUCCESS Java $curver was detected"
fi


if command -v java &>/dev/null; then
    echo -e "$ABOUT_TITLE is starting..."
    if [[ "$OSTYPE" == "darwin"* ]]; then
        if [ -f "$PROPS_FILE.jar" ]; then
            prefix="" # aside launcher, e.g. preinstall
        else
            prefix="../../" # back two directories, e.g. postinstall
        fi
        java $LAUNCH_OPTS -Xdock:name="$ABOUT_TITLE" -Xdock:icon="$ICON_PATH" -jar -Dapple.awt.UIElement="true" "${prefix}$PROPS_FILE.jar" -NSRequiresAquaSystemAppearance False "$@"
    else
        java $LAUNCH_OPTS -jar "$PROPS_FILE.jar" "$@"
    fi
else
    echo -e "$FAILURE Java $JAVA_MIN+ was not found"
fi

popd &>/dev/null