#!/bin/sh

if [ -z "$*" ]; then
	printf "enter number:"
	read -r num
else
	num=$*
fi

mkdir -p $HOME/.cache/$num
dir="$HOME/.cache/$num"
trap "rm -rf $dir;exit 0" INT HUP
webp="$(curl -s "https://nhentai.net/g/$num/1/")"
id=$(printf "$webp" | sed -nE 's/.*galleries\/([^"]*)\/.*/\1/p')
pg=$(printf "$webp" | sed -nE 's/.*pages">(.*)/\1/p' | cut -d\< -f1)

for i in $(seq $pg)
do
	echo "downloading $i.jpg"
	i_t=$(printf "%03d" $i)
	setsid -f curl -s "https://i.nhentai.net/galleries/$id/$i.jpg" -o "$dir/$i_t"
	sleep 1
done

echo "waiting 3 sec for images to download completely"
sleep 3
echo "converting images to pdf"
convert "$dir/*" "$num.pdf" && printf "saved pdf as $num.pdf\nenjoy 😏😏"
rm -rf $dir