#!/usr/bin/env bash
shopt -s nullglob

# Defaults for XDG
if ! [[ "$XDG_RUNTIME_DIR" ]]; then
	XDG_RUNTIME_DIR="/run/user/$UID"
fi

msg() { printf '%s\n' "$*"; }
err() { echo "$*" >&2; }

usage() {
	printf 'Usage: ufwd [-hn] [-d workdir] -D [check delay]\n'
	printf '   -h            # Show this message.\n'
	printf '   -n            # Enable notifications with notify-send. Must be installed.\n'
	printf '   -d [path]     # Set the dir that is to be watched.\n'
}

upload() {
	declare file=$1; shift

	upload_output=$( ufw -R "$@" "$file" )
	upload_return=$?

	if (( flag_enable_notifications )); then
		if (( $upload_return )); then
			notify-send 'ufwd' "File upload failed: $upload_output"
		else
			notify-send 'ufwd' "File uploaded: $upload_output"
		fi
	fi

	if (( flag_enable_clipboard )); then
		read -r fl <<< "$upload_output"
		xclip <<< "$fl"
	fi

	printf '%s\n' "$upload_output"
}

main() {
	while (( $# )); do
		case "$1" in
			(--help|-h) usage; return 0;;
			(--notify|-n) flag_enable_notifications=1;;
			(--clipboard|-c) flag_enable_clipboard=1;;

			(--workdir|-d) cfg_workdir+=( "$2" ); shift;;

			(--) shift; break;;
			(-*) err "Unknown key: $1"; usage; return 1;;
			(*) break;;
		esac
		shift
	done

	[[ $cfg_workdir ]] || cfg_workdir="$XDG_RUNTIME_DIR/ufwd"

	if (( flag_enable_notifications )); then
		if type -P notify-send &>/dev/null; then
			msg "Found notify-send."
		else
			err "notify-send not found in PATH, disabling notifications."
			flag_enable_notifications=0
		fi
	fi

	for p in "${cfg_workdir[@]}"; do
		[[ -d "$p" ]] || return 1
	done

	printf 'Working in:\n'
	printf ' - %s\n' "${cfg_workdir[@]}"

	while read -r d e f; do
		upload "$d$f" "$@" &
	done < <( inotifywait -m -e close_write "${cfg_workdir[@]}" )
}

main "$@"