#!/bin/bash
#
# auto-cpufreq-installer:
# auto-cpufreq source code based installer

SCRIPT_PATH=$(readlink -f "$0")
SCRIPT_DIR=$(dirname "${SCRIPT_PATH}")
cd "${SCRIPT_DIR}"

distro="$(lsb_release -is)"
release="$(lsb_release -rs)"
codename="$(lsb_release -cs)"

separator(){
sep="\n-------------------------------------------------------------------------------"
echo -e $sep
}

# root check
root_check(){
if (( $EUID != 0 ));
then
    separator
    echo -e "\nMust be run as root (i.e: 'sudo $0')."
    separator
    exit 1
fi
}

# python packages install
pip_pkg_install(){
python3 -m pip install -r requirements.txt
}

complete_msg(){
echo -e "\nauto-cpufreq tool successfully installed.\n"
echo -e "For list of options, run:\nauto-cpufreq"
}

# tool install
install(){
python3 setup.py install --record files.txt
mkdir -p /usr/local/share/auto-cpufreq/
cp -r scripts/ /usr/local/share/auto-cpufreq/
}

tool_install(){
# Debian
if [ -f /etc/debian_version ];
then
    separator
    echo -e "\nDetected Debian based distribution"
    separator
    echo -e "\nSetting up Python environment\n"
    apt install python3-dev python3-pip inxi -y
    separator
    echo -e "\nInstalling necessary Python packages\n"
    pip_pkg_install
    separator
    echo -e "\ninstalling auto-cpufreq tool\n"
    install
    separator
    complete_msg
    separator
# RedHat
elif [ -f /etc/redhat-release ];
then
    separator
    echo -e "\nDetected RedHat based distribution\n"
    echo -e "\nSetting up Python environment\n"
    # CentOS exception
    if [ -f /etc/centos-release ];
    then
        yum install platform-python-devel inxi
    else
        yum install python-devel inxi
    fi
    echo -e "\nInstalling necessary Python packages\n"
    pip_pkg_install
    separator
    echo -e "\ninstalling auto-cpufreq tool\n"
    install
    separator
    complete_msg
    separator
# Other
else
    separator
    echo -e "\nDidn't detect Debian or RedHat based distro.\n"
    echo -e "To complete installation, you need to:"
    echo -e "Install: python3, pip3 and inxi\n"
    echo -e "Install necessary Python packages:"
    echo -e "pip3 install psutil click distro power"
    echo -e "\nRun following sequence of lines:"
    echo -e "\n-----"
    echo -e "\npython3 setup.py install --record files.txt"
    echo -e "mkdir -p /usr/local/share/auto-cpufreq/"
    echo -e "cp -r scripts/ /usr/local/share/auto-cpufreq/"
    echo -e "\n-----"
    echo -e "\nAfter which tool is installed, for full list of options run:"
    echo -e "auto-cpufreq"
    separator
    echo -e "\nConsider creating a feature request to add support for your distro:"
    echo -e "https://github.com/AdnanHodzic/auto-cpufreq/issues/new"
    echo -e "\nMake sure to include following information:\n"
    echo -e "Distribution: $distro"
    echo -e "Release: $release"
    echo -e "Codename: $codename"
    separator
fi
}

tool_remove(){

files="files.txt"
share_dir="/usr/local/share/auto-cpufreq/"
srv_install="/usr/bin/auto-cpufreq-install"
srv_remove="/usr/bin/auto-cpufreq-remove"
log_file="/var/log/auto-cpufreq.log"
tool_proc_rm="auto-cpufreq --remove"

# stop any running auto-cpufreq argument (daemon/live/monitor)
tool_arg_pids=( $(pgrep -f "auto-cpufreq --") )
for pid in "${tool_arg_pids[@]}"; do
  if [[ $tool_arg_pids != $$ ]]; then
    kill "$tool_arg_pids"
  fi
done

# run uninstall in case of installed daemon
if [ -f $srv_remove ]
then
    eval $tool_proc_rm
fi

# remove auto-cpufreq and all its supporting files
[ -f $files ] && cat $files | xargs sudo rm -rf && rm -f $files
[ -f $share_dir ] && rm -rf $share_dir

# files cleanup
[ -f $srv_install ] && rm $srv_install
[ -f $srv_remove ] && rm $srv_remove
[ -f $log_file ] && rm $log_file

separator
echo -e "\nauto-cpufreq tool and all its supporting files successfully removed.\n"
}

ask_operation(){
echo -e "\n-------------------------- auto-cpufreq installer -----------------------------"
echo -e "\nWelcome to auto-cpufreq tool installer."
echo -e "\nOptions:\n"
read -p "[I]nstall
[R]emove
[Q]uit

Select a key: [i/r/q]: " answer
}

root_check

if [[ -z "${1}" ]];
then
    ask_operation
else
  case "${1}" in
    "--install")
        answer="i"
        ;;
    "--remove")
        answer="r"
        ;;
    *)
        answer="n"
        ;;
  esac
fi

if [[ $answer == [Ii] ]];
then
    root_check
    tool_install
elif [[ $answer == [Rr] ]];
then
    root_check
    tool_remove
elif [[ $answer == [Qq] ]];
then
    separator
    echo ""
    exit 0
else
    separator
    echo -e "\nUnknown key, aborting ...\n"
    exit 1
fi