install-prereqs.sh

clear
cf=""

#Check if the number of arguments equals 1. If so, then parse the argument.
if [ $# -eq 1 ]; then

    #Check if the argument equals "--uninstall". If so, start the uninstall process.
    if [ $1 == "--uninstall" ]; then

        #Ask if the user wants to continue.
        echo -n "Are you sure you want to continue the uninstall process, $USER? (Y/N): "; read cf

        #If the user entered "Y" or "y", then continue.
        if [ $cf == "Y" ] || [ $cf == "y" ]; then
            yes | pip uninstall pytmx
            yes | pip uninstall setuptools
            yes | sudo apt remove --force-yes python-pip
            yes | sudo apt remove --force-yes python-pygame
            exit 0
        fi

        #If the user entered "N" or "n", then abort.
        if [ $cf == "N" ] || [ $cf == "n" ]; then
            echo "Uninstall process terminated."
            exit 0
        fi

        #If the user entered an invalid answer, then abort.
        echo "Invalid answer; uninstall process aborted."
        exit 0
    fi

    #If the user entered an invalid argument, then exit.
    echo "Invalid argument."
    exit 0
fi

#Ask the question and respond to the answer.
function ask_question(){

    #Ask if the user is ready to continue.
    echo -n "Are you sure you want to continue, $USER? (Y/N): "; read cf

    #If the answer is "N" or "n", then exit.
    if [ $cf == "N" ] || [ $cf == "n" ]; then
        abort
    fi

    #if the answer is "Y" or "y", then proceed.
    if [ $cf == "Y" ] || [ $cf == "y" ]; then
        install_prereqs
    fi

    #If the answer is not "N", "n", "Y", or "y", then ask the question again.
    if [ $cf != "N" ] && [ $cf != "n" ] && [ $cf != "Y" ] && [ $cf != "y" ]; then
        invalid_answer
    fi
}

#Abort the process.
function abort(){
    echo "Process terminated."
    exit 0
}

#Install the prerequisites.
function install_prereqs(){
    yes | sudo apt install python-pygame
    yes | sudo apt install python-pip
    pip install setuptools
    pip install pytmx
    exit 0
}

#Reask the question.
function invalid_answer(){
    echo "Invalid answer."
    ask_question
}

#Ask the question.
ask_question