#!/bin/sh

# Gives a dmenu prompt to mount unmounted drives and Android phones. If
# they're in /etc/fstab, they'll be mounted automatically. Otherwise, you'll
# be prompted to give a mountpoint from already existsing directories. If you
# input a novel directory, it will prompt you to create that directory.

getmount() {
	[ -z "$chosen" ] && exit 1
	# shellcheck disable=SC2086
	mp="$(find $1 2>/dev/null | dmenu -i -p "Type in mount point.")" || exit 1
	test -z "$mp" && exit 1
	if [ ! -d "$mp" ]; then
		mkdiryn=$(printf "No\\nYes" | dmenu -i -p "$mp does not exist. Create it?") || exit 1
		[ "$mkdiryn" = "Yes" ] && (mkdir -p "$mp" || sudo -A mkdir -p "$mp")
	fi
}

mountusb() {
	chosen="$(echo "$usbdrives" | dmenu -i -p "Mount which drive?")" || exit 1
	chosen="$(echo "$chosen" | awk '{print $1}')"
	sudo -A mount "$chosen" 2>/dev/null && notify-send "禍 USB mounting" "$chosen mounted." && exit 0
	alreadymounted=$(lsblk -nrpo "name,type,mountpoint" | awk '$3!~/\/boot|\/home$|SWAP/&&length($3)>1{printf "-not ( -path *%s -prune ) ",$3}')
	getmount "/mnt /media /mount /home -maxdepth 5 -type d $alreadymounted"
	partitiontype="$(lsblk -no "fstype" "$chosen")"
	case "$partitiontype" in
	"vfat") sudo -A mount -t vfat "$chosen" "$mp" -o rw,umask=0000 ;;
	"exfat") sudo -A mount "$chosen" "$mp" -o uid="$(id -u)",gid="$(id -g)" ;;
	*)
		sudo -A mount "$chosen" "$mp"
		user="$(whoami)"
		ug="$(groups | awk '{print $1}')"
		sudo -A chown "$user":"$ug" "$mp"
		;;
	esac && notify-send "禍 USB mounting" "$chosen mounted to $mp." ||
		notify-send "禍 Drive failed to mount." "Probably a permissions issue or a drive is already mounted."
}

mountandroid() {
	chosen="$(echo "$anddrives" | dmenu -i -p "Which Android device?")" || exit 1
	chosen="$(echo "$chosen" | cut -d : -f 1)"
	getmount "$HOME -maxdepth 3 -type d"
	echo "OK" | dmenu -i -p "Tap Allow on your phone if it asks for permission and then press enter" || exit 1
	simple-mtpfs --device "$chosen" "$mp" &&
		notify-send " Android Mounting" "Android device mounted to $mp." ||
		notify-send " Android Failed mounting." "Probably a permissions issue or phone is already mounted"
}

asktype() {
	choice="$(printf "USB\\nAndroid" | dmenu -i -p "Mount a USB drive or Android device?")" || exit 1
	case $choice in
	USB) mountusb ;;
	Android) mountandroid ;;
	esac
}

anddrives=$(simple-mtpfs -l 2>/dev/null)
usbdrives="$(lsblk -rpo "name,type,size,mountpoint" | grep 'part\|rom' | awk '$4==""{printf "%s (%s)\n",$1,$3}')"

if [ -z "$usbdrives" ]; then
	[ -z "$anddrives" ] && echo "No USB drive or Android device detected" && exit
	echo "Android device(s) detected."
	mountandroid
else
	if [ -z "$anddrives" ]; then
		echo "USB drive(s) detected."
		mountusb
	else
		echo "Mountable USB drive(s) and Android device(s) detected."
		asktype
	fi
fi