#!/usr/bin/bash
yay -Syua

echo "==> Updating flatpaks..."
flatpak update

echo "==> Syncing database..."
sudo pacman -Sy --noconfirm || exit 1

function update_init_fail {
    echo "==> Initialising system update failed." >&2
    echo "==> Cleaning up..." >&2
    sudo rm -rf /var/lib/system-update
    exit 1
}

if pacman -Qu >&-; then
    echo "==> System updates available."
    echo "==> Downloading system updates..."
    if [ ! -e /var/lib/system-update ]; then
        sudo mkdir -p /var/lib/system-update || update_init_fail
    fi
    sudo pacman -Suw --noconfirm --cachedir /var/lib/system-update || update_init_fail
    sudo ln -s /var/lib/system-update /system-update || update_init_fail
    echo "==> System update scheduled for next reboot."
else
    echo "==> Up to date."
    if [ -e /system-update ]; then
        echo "==> There is another system update pending."
        while true; do
            read -n1 -p"==> Unschedule system update?    [Y/n]: " q
            [ ! $q = "" ] && echo
            case $q in
                y|Y|"")
                    sudo rm /system-update || {
                        echo "==> Could not unschedule pending system update" >&2
                        exit 1
                    }
                    echo "==> Unscheduled pending system update"
                    break;;
                n|N)
                    break;;
                *)
                    continue;;
            esac
        done
    fi
fi