pre_install() {
    if [[ ! -f "/usr/share/gtk-4.0/settings.ini" ]]
    then
        echo "### ERROR: /usr/share/gtk-4.0/settings.ini doesn't exist."
        exit 1
    fi

    if [[ ! -f "/usr/share/gtk-3.0/settings.ini" ]]
    then
        echo "### ERROR: /usr/share/gtk-3.0/settings.ini doesn't exist."
        exit 1
    fi
}

post_install() {
    # GTK 4
    if [[ ! -f "/usr/share/gtk-4.0/settings-old.ini" ]]
    then
        echo "> Renaming gtk-4.0/settings.ini to gtk-4.0/settings-old.ini."
        mv /usr/share/gtk-4.0/settings.ini /usr/share/gtk-4.0/settings-old.ini
    fi

    echo "> Installing modified config to gtk-4.0/settings.ini."
    cp /etc/blurry-text-fix/gtk-4.0/settings.ini /usr/share/gtk-4.0/settings.ini

    if [[ -f "/usr/bin/flatpak" ]]
    then
        echo "> Overriding flatpak"
        flatpak override --filesystem=xdg-config/gtk-4.0
        flatpak override --filesystem=xdg-config/gtk-3.0
    fi
    
    # GTK 3
    if [[ ! -f "/usr/share/gtk-3.0/settings-old.ini" ]]
    then
        echo "> Renaming gtk-3.0/settings.ini to gtk-3.0/settings-old.ini."
        mv /usr/share/gtk-3.0/settings.ini /usr/share/gtk-3.0/settings-old.ini
    fi

    echo "> Installing modified config to gtk-3.0/settings.ini."
    cp /etc/blurry-text-fix/gtk-3.0/settings.ini /usr/share/gtk-3.0/settings.ini

    echo "INFO: Your backup file is in /usr/share/gtk-<version>/settings-old.ini"
    echo "INFO: If you want to edit settings.ini, then edit this file /etc/blurry-text-fix and then run blurry-text-fix-reload"
    echo "### Done. Please relog to apply changes."

}

post_upgrade() {
    echo "### Please ignore the file information warnings."
    post_install
}

post_remove() {
    echo "> Removing modified gtk-4.0/settings.ini."
    rm /usr/share/gtk-4.0/settings.ini
    echo "> Restoring old gtk-4.0/settings.ini."
    mv /usr/share/gtk-4.0/settings-old.ini /usr/share/gtk-4.0/settings.ini
    echo "> Removing modified gtk-3.0/settings.ini."
    rm /usr/share/gtk-3.0/settings.ini
    echo "> Restoring old gtk-3.0/settings.ini."
    mv /usr/share/gtk-3.0/settings-old.ini /usr/share/gtk-3.0/settings.ini

    echo "INFO: The old config file is stored in /usr/share/gtk-<version>/settings.ini."
    echo "### Done. Please relog to apply changes."
}