#!/bin/bash

clear

ESC=`printf "\033"`;

input_key() {
    read -s -n3 INPUT;
    echo $INPUT;
}

check_selected() {
    if [ $1 = $2 ];
    then echo " => "
    else echo "    "
    fi
}

select_menu() {
    SELECTED=1;
    INPUT="";
    MIN_MENU=1;
    MAX_MENU=$#;

    while true;
    do
        for (( i=1; i<=$#; i++ ))
        do
            printf "$ESC[2K$(check_selected $i $SELECTED) $i. ${!i}\n";
        done
        printf "\n$ESC[2KKubernetes Cluster Select\ninfra,cmoamgmt,saasmgmt,dsk-dev,dsk-prod\n\n";
        INPUT=$(input_key);
        if [[ $INPUT = "" ]];
        then break;
        fi

        if [[ $INPUT = $ESC[A ]];
        then SELECTED=$(expr $SELECTED - 1);
        elif [[ $INPUT = $ESC[B ]];
        then SELECTED=$(expr $SELECTED + 1);
        fi

        if [[ $SELECTED -lt $MIN_MENU ]];
        then SELECTED=${MIN_MENU};
        elif [[ $SELECTED -gt $MAX_MENU ]];
        then SELECTED=${MAX_MENU};
        fi

        printf "$ESC[$(expr $# + 3)A";
    done
    return `expr ${SELECTED} - 1`;
}

select_test() {
        arr_params=("INFRA-CLUSTER" "CMOAMGMT-CLUSTER" "SAASMGMT-CLUSTER" "DSK-DEV-CLUSTER" "DSK-PROD-CLUSTER");
    echo -e "\n";
    echo "     __ __   ____    _____          ______    __                   __ ";
    echo "    / //_/  ( __ )  / ___/         / ____/   / /  __  __   _____  / /_  ___    _____ ";
    echo "   / ,<    / __  |  \__ \         / /       / /  / / / /  / ___/ / __/ / _ \  / ___/ ";
    echo "  / /| |  / /_/ /  ___/ /        / /___    / /  / /_/ /  (__  ) / /_  /  __/ / / ";
    echo " /_/ |_|  \____/  /____/         \____/   /_/   \__,_/  /____/  \__/  \___/ /_/ ";
    echo -e "\n";
    select_menu "${arr_params[@]}";
    local SELECTED=$?;
    SELECTED_MODE=${arr_params[${SELECTED}]};
}

main() {
    select_test;
    if [ $SELECTED -eq 1 ]
        then
        kubectl config use-context infra
    elif [ $SELECTED -eq 2 ]
        then
        kubectl config use-context cmoamgmt
    elif [ $SELECTED -eq 3 ]
        then
        kubectl config use-context saasmgmt
    elif [ $SELECTED -eq 4 ]
        then
        kubectl config use-context dsk-dev
    elif [ $SELECTED -eq 5 ]
        then
        kubectl config use-context dsk-prod
    fi
}
main