#!/bin/bash

SERVICE_NAME="Generic System"
PATH_TO_EXEC="/home/middleware/git/gs-demo/"

# Generate the temporary file used to store the pid
init() {
    if [ ! -d "$HOME/log/" ]; then
        mkdir -p "HOME/log/";
    fi
    if [ -d "$HOME/.tmp/" ]; then
        touch "$HOME/.tmp/GenericSystem-pid";
    else
        mkdir -p "$HOME/.tmp" && touch "$HOME/.tmp/GenericSystem-pid";
    fi
}

PID_PATH_NAME="$HOME/.tmp/GenericSystem-pid"

# Function to start the app
do_start(){
    echo "Starting $SERVICE_NAME ..."
    init;
    PID=$(cat "$PID_PATH_NAME");
    if [ -z $PID ]; then
        cd $PATH_TO_EXEC;
        mvn clean validate install exec:java -Dexec.mainClass="org.genericsystem.demo.App" -Dexec.args="8080" 2>>/home/middleware/log/error.log >>/home/middleware/log/genericsystem.log &
        echo $! > $PID_PATH_NAME
	echo "$SERVICE_NAME is started with pid $(cat $PID_PATH_NAME)"
    else
       	echo "$SERVICE_NAME is already running ..."
        # Try a restart?
    fi
}

# Function to stop the app
do_stop() {
    echo "Stopping $SERVICE_NAME ..."
    init;
    PID=$(cat "$PID_PATH_NAME");
    if [ -z $PID ]; then
        echo "$SERVICE_NAME is not running"
    else
        echo "$SERVICE_NAME is stopping ..."
	echo "killing processus : $PID"
        kill $PID;
        if [ $? -eq 0 ]; then
            echo "$SERVICE_NAME is stopped"
            rm $PID_PATH_NAME
        else
            echo "Unable to terminate $SERVICE_NAME (exit code = $?)"
        fi
    fi
}

# Function to check the status
check_status() {
    init;
    PID=$(cat "$PID_PATH_NAME");
    if [ -z $PID ]; then
        echo "$SERVICE_NAME is not running"
    else
        echo "$SERVICE_NAME is running with pid = $PID"
    fi
}

# Main
case $1 in
    start)
	do_start
	;;
    stop)
	do_stop
	;;
    restart)
        do_stop && do_start
	;;
    status)
        check_status
        ;;
    *)
        echo "Usage: genericsystem {start|stop|restart|status}" >&2
        ;;
esac