#!/usr/bin/env bash

set -o errexit
set -o nounset
set -o pipefail
shopt -s inherit_errexit

arg_count="${#@}"
# script assumes the url is passed as last argument
url="${!#}"

if test "${arg_count}" -eq 0
then
	printf "Usage:\n\t%s\n\t%s\n\t%s\n\t%s\n\n%s\n" \
		'yt-dlp.sh "https://youtu.be/xxx"' \
		'yt-dlp.sh "https://youtube.com/watch?v=xxx"' \
		'yt-dlp.sh "https://youtu.be/xxx?list=xxx"' \
		'yt-dlp.sh "https://youtube.com/playlist?list=xxx"' \
		"always pass the download url as the last argument"
	exit 1
fi

if grep -Eiq "[?&]list=" <<< "${url}"
then
	output_template="%(playlist)s/%(playlist_index)s-%(title)s.%(ext)s"
else
	output_template="%(title)s.%(ext)s"
fi

yt-dlp \
	--format-sort "quality, res, fps, hdr, vcodec:av1, channels, acodec" \
	--merge-output-format "mkv" \
	--no-overwrites \
	--output "${output_template}" \
	--prefer-free-formats \
	--remux-video "mkv" \
	--restrict-filenames \
	"${@}"