#!/bin/bash

_clean_packages() {
    local _leave_these_packages="base\nbase-devel\ncachyos-keyring\ncachyos-hello\ngrub\nefibootmgr\noctopi\nca-certificates\nca-certificates-mozilla\nca-certificates-utils\npacman\narchlinux-keyring\n"
    local _packages_to_remove=($(comm -23 <(pacman -Qq | sort) <({ pacman -Qqg base-devel; pacman -Qqg cachyos; printf $_leave_these_packages; } | sort -u)))
    local xx
    # @ does one by one to avoid errors in the entire process
    # * can be used to treat all packages in one command
    for xx in "${_packages_to_remove[@]}"; do pacman -Rsc "$xx" --noconfirm; done

    rm /etc/sddm.conf || true
}

_try_v3() {
    /lib/ld-linux-x86-64.so.2 --help | grep "x86-64-v3 (supported, searched)" > /dev/null

    local pacman_conf="/etc/pacman.conf"
    local pacman_conf_cachyos="/etc/pacman-more.conf"
    local pacman_conf_path_backup="/etc/pacman.conf.bak"

    if [ $? -eq 0 ]; then
        echo "x86-64-v3 is supported"

        sed -i 's/Architecture = auto/#Architecture = auto/' $pacman_conf_cachyos
        sed -i 's/#<disabled_v3>//g' $pacman_conf_cachyos

        echo "backup old config"
        mv $pacman_conf $pacman_conf_path_backup

        echo "CachyOS -v3 Repo changed"
        mv $pacman_conf_cachyos $pacman_conf

    else
        echo "x86-64-v3 is not supported"
    fi

}

_clean_packages
_try_v3