#!/bin/bash
export DIALOGOPTS='--insecure --no-lines --visit-items'

 
# Get the list of timezones
mapfile -t regions < <(timedatectl --no-pager list-timezones | cut -d '/' -f1 | sort -u)

# Use the same text twice here and just hide the tag field.
    region=$(dialog --backtitle "Please select your Region" \
            --no-tags \
            --menu "Use up and down arrows or page-up and page-down to navigate the list, and press 'Enter' to make your selection." 0 0 0 \
            $(for i in ${regions[@]} ; do echo "$i";echo "$i";done) --stdout)


mapfile -t cities < <(timedatectl --no-pager list-timezones | grep "$region" | cut -d '/' -f2 | sort -u)

# Use the same text twice here and just hide the tag field.
    city=$(dialog --backtitle "Please select a city near you" \
            --no-tags \
            --menu "Use up and down arrow or page-up and page-down to navigate the list." 0 0 10 \
            $(for i in ${cities[@]} ; do echo "$i";echo "$i";done) --stdout)

# Set the timezone
sudo timedatectl set-timezone ${region}/${city}
if [[ -f /etc/localtime ]]; then
    sudo rm /etc/localtime
fi
sudo ln -s /usr/share/zoneinfo/${region}/${city} /etc/localtime

# Make sure we are syncing with the internet
sudo timedatectl set-ntp false
sudo systemctl stop ntpd
sudo ntpd -gq
sudo systemctl enable ntpd --now
exit 0