#!/bin/bash
# Function to get the process ID of the application
getAppPid() {
    app=$1
    pid=$(ps -ef | grep "$app" | grep -v "grep\|$0" | awk '{print $2}')
    echo "$pid"
}
# Function to start the application
startApp() {
    app=$1
    if [ -z "$app" ]; then
        echo "Please provide the application name."
        exit 1
    fi
    pid=$(getAppPid "$app")
    if [ -n "$pid" ]; then
        echo "Application is already running. PID: $pid"
        exit 1
    fi
    nohup java -jar "$app" > /dev/null 2>&1 &
    echo "Application started."
}
# Function to stop the application
stopApp() {
    app=$1
    if [ -z "$app" ]; then
        echo "Please provide the application name."
        exit 1
    fi
    pid=$(getAppPid "$app")
    while [ -n "$pid" ]; do
        kill "$pid"
        echo "Application is still running."
        sleep 1
        pid=$(getAppPid "$app")
    done
    echo "Application stopped."
}
# Function to restart the application
restartApp() {
    app=$1
    if [ -z "$app" ]; then
        echo "Please provide the application name."
        exit 1
    fi
    stopApp "$app"
    startApp "$app"
}
# Function to get the status of the application
getStatus() {
    app=$1
    if [ -z "$app" ]; then
        echo "Please provide the application name."
        exit 1
    fi
    pid=$(getAppPid "$app")
    if [ -n "$pid" ]; then
        echo "Application is running. PID: $pid"
    else
        echo "Application is not running."
    fi
}
# Parse command line arguments
app="$1"
operation="$2"

case $operation in

    start|1)
        startApp "$app"
        ;;
    stop|2)
        stopApp "$app"
        ;;
    restart|3)
        restartApp "$app"
        ;;
    status)
        getStatus "$app"
        ;;
    *)
        echo "Invalid operation" "$1" "$2"
        exit 1
        ;;
esac