#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage:
		  wms ACTION
		  wms -h
	EOF
}

help() {
	cat <<-'EOF'

		Options:
		  -h, --help    show this message

		  ACTION        one of:
		                - uuid
		                - date
		                - clear-notification
		                - mpris


		Helper script to launch CLI commands, without having complex
		quoting, piping, flow control, etc. clutter the wm configuration
		file.


		Examples:

		  Generate a new UUID, copy it to the clipboard and send a
		  desktop notification:

		    $ wms uuid
	EOF
}

for flag in "$@"; do
	case "$flag" in
		--)
			break
			;;
		--help)
			usage
			help
			exit
			;;
		*)
			;;
	esac
done

while getopts 'h' flag; do
	case "$flag" in
		h)
			usage
			help
			exit
			;;
		*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))
ACTION="${1:-}"

eval "$(assert-arg "$ACTION" 'ACTION')"


copy_and_notify() {
	STR="$1"
	LABEL="$2"
	printf '%s' "$STR" | copy -n
	notify-send -t 5000 -u normal -- \
		"$STR" "$LABEL copied to clipboard"
}

format_player_name() {
	if echo "$1" | grep -Eq '^firefox\.instance.*'; then
		echo 'firefox'
	else
		echo "$PLAYER"
	fi
}

format_player_title() {
	TITLE="$(playerctl --player="$PLAYER" metadata xesam:title)"
	if [ "${#TITLE}" -gt 82 ]; then
		printf '%s...\n' "$(echo "$TITLE" | head -c 80)"
	else
		echo "$TITLE"
	fi
}

case "$ACTION" in
	uuid)
		copy_and_notify "$(uuid)" 'UUID'
		;;
	date)
		copy_and_notify "$(date '+%Y-%m-%d')" 'date'
		;;
	clear-notification)
		dunstctl close
		;;
	mpris)
		PLAYER="$(cat "$XDG_CACHE_HOME"/euandreh-mpris-player.txt)"
		PLAYER_NAME="$(format_player_name "$PLAYER")"
		PLAYER_TITLE="$(format_player_title "$PLAYER")"
		printf '%s: %s\n' "$PLAYER_NAME" "$PLAYER_TITLE"
		;;
	*)
		printf 'Bad ACTION: %s.\n\n' "$ACTION" >&2
		usage >&2
		exit 2
		;;
esac