#!/bin/bash

########################################
# install latest python version
# into /usr/bin/
# with all neccessary packages
########################################

def_version="3.11.1"
py_dir="python_installation"

sudo yum update -y
sudo yum upgrade -y
sudo yum remove openssl-devel -y
sudo yum -y groupinstall "Development Tools"
sudo yum -y install gcc openssl11 openssl11-devel bzip2-devel libffi-devel

py_check(){
    version=${1:-$1}
    local version_check=$(python${version::-2} -V 2>&1 | grep -Po '(?<=Python )(.+)')
    echo $version_check
    ! [ -z $version_check ]
}

install_py() {
        mkdir $py_dir && cd $py_dir
        wget -v https://www.python.org/ftp/python/$version/Python-$version.tgz
        tar xzf Python-$version.tgz #v
        rm -f Python-$version.tgz
        cd Python-$version
        ./configure --enable-optimizations --with-ensurepip=install
        make -j $(nproc)
        sudo make altinstall
        # cleanup
        cd ../..
        rm -rf $py_dir


        echo "Python-$version is installed. Enjoy ;)"
}

echo "#################### <Start> ####################"
read -t 10 -p "Enter Python version you wish to install [default $def_version] If no value entered within 10 seconds window, default value is used: " version

# check if Python is already installed
if [[ -z $version ]]
    then
    #checking default version
    echo "Checking if default Python $def_version is installed..."
        if py_check $def_version;
            then
                echo "Python-$version is alredy installed"
            else
                echo "Installing Python-$version..."
                install_py $version
        fi
    else
    # checking non default version
    echo "Checking if entered Python $version is installed..."
         if py_check $version;
            then
                echo "Python-$version is alredy installed"
            else
                echo "Installing Python-$version..."
                install_py $version
        fi
fi
echo "#################### The End ####################"