#!/usr/bin/env bash
function header_info {
    cat <<"EOF"
   __________  __  __
  / ____/ __ \/ / / /
 / /   / /_/ / / / / 
/ /___/ ____/ /_/ /  
\____/_/    \____/   
Scaling Governors
 
EOF
}
clear
header_info
set -e
while true; do
    read -p "View CPU Scaling Governors. Proceed(y/n)?" yn
    case $yn in
    [Yy]*) break ;;
    [Nn]*) exit ;;
    *) echo "Please answer yes or no." ;;
    esac
done
clear

show_menu() {
    CL=$(echo "\033[m")
    GN=$(echo "\033[32m")
    BL=$(echo "\033[36m")
    YW=$(echo "\033[33m")
    fgred=$(echo "\033[31m")
    header_info
    CK=$(uname -r)
    IP=$(hostname -I)
    #    MAC=$(cat /sys/class/net/eno1/address)
    ACSG=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors)
    CCSG=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor)
    echo -e "${YW}Proxmox IP ${BL}${IP}${CL}"

    echo -e "${YW}MAC Address ${BL}${MAC}${CL}"

    echo -e "${YW}Current Kernel ${BL}${CK}${CL}"

    echo -e "\n${YW}Available CPU Scaling Governors
    ${BL}${ACSG}${CL}"

    echo -e "\n${YW}Current CPU Scaling Governor
    ${BL}${CCSG}${CL}"
    printf "\n ${fgred}Only Select Available CPU Scaling Governors From Above${CL}\n \n"
    printf "${BL}**${YW} 1)${GN} Switch to ${BL}conservative${CL}${GN} CPU Scaling Governor ${CL}\n"
    printf "${BL}**${YW} 2)${GN} Switch to ${BL}ondemand${CL}${GN} CPU Scaling Governor ${CL}\n"
    printf "${BL}**${YW} 3)${GN} Switch to ${BL}userspace${CL}${GN} CPU Scaling Governor ${CL}\n"
    printf "${BL}**${YW} 4)${GN} Switch to ${BL}powersave${CL}${GN} CPU Scaling Governor ${CL}\n"
    printf "${BL}**${YW} 5)${GN} Switch to ${BL}performance${CL}${GN} CPU Scaling Governor ${CL}\n"
    printf "${BL}**${YW} 6)${GN} Switch to ${BL}schedutil${CL}${GN} CPU Scaling Governor ${CL}\n"
    printf "\n ${fgred}NOTE: Settings return to default after reboot${CL}\n"
    printf "\n Please choose an option from the menu and press [ENTER] or ${fgred}x${CL} to exit."
    read opt
}
clear
show_menu
while [ "$opt" != "" ]; do
    if [ "$opt" = "" ]; then
        exit
    else
        case $opt in
        1)
            echo "conservative" | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
            clear
            show_menu
            ;;
        2)
            echo "ondemand" | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
            clear
            show_menu
            ;;
        3)
            echo "userspace" | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
            clear
            show_menu
            ;;
        4)
            echo "powersave" | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
            clear
            show_menu
            ;;
        5)
            echo "performance" | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
            clear
            show_menu
            ;;
        6)
            echo "schedutil" | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
            clear
            show_menu
            ;;
        x)
            exit
            ;;
        \n)
            exit
            ;;
        *)
            clear
            show_menu
            ;;
        esac
    fi
done