#!/bin/bash

SONGS_PATH="content/"

usage() {
  cat <<EOF
Usage: $0 <command> [options]

Commands:
  help          Show this help message and exit
  new [name]    Create a new song [with the specified name]
  edit <name>   Edit song with a text editor
  iedit <name>  Interactive edit with PDF preview

Examples:
  $0 help
  $0 new [song-name]
  $0 edit <song-name>
  $0 iedit <song-name>

EOF
  exit 1
}

create_new_song() {
	if [ -z "$name" ]; then
		read -p "Song name (file-name-in-path): " name
	fi
	read -p "Song title: " title
	read -p "Artist: " artist
	read -p "Category: " category

	mkdir -p "$SONGS_PATH/$name"
	echo -e "{title: $title}\n{artist: $artist}" > "$SONGS_PATH/$name/$name.cho"
	echo -e "+++\ntitle = \"$title\"\n[taxonomies]\ncategory = [\"$category\"]\nartist = [\"$artist\"]\n+++" > "$SONGS_PATH/$name/index.md"
	echo "Song $name created."
}

if [ "$#" -lt 1 ]; then
	usage
fi

case "$1" in
	new)
		if [ "$#" -eq 2 ]; then
			name="$2"
		fi
		create_new_song
		;;
	edit)
		if [ "$#" -eq 2 ]; then
			xdg-open "content/$2/$2.cho"
		else
			echo -e "Missing song name\n"
			usage
		fi
		;;
	iedit)
		if [ "$#" -eq 2 ]; then
			touch "content/$2/$2.pdf"
			xdg-open "content/$2/$2.pdf" &
			xdg-open "content/$2/$2.cho"
		else
			echo -e "Missing song name\n"
			usage
		fi
		;;
	help)
		usage
		;;
	*)
		echo -e "Invalid argument: $1\n"
		usage
		;;
esac