#!/bin/bash

# Creates a gif using a list of files from stdin
tmpdir="/tmp/sxiv-gif/"
rm -rf "$tmpdir"
mkdir -p "$tmpdir"

framerate="prompt"
format="gif"
extension=""

while [[ $# -gt 0 ]]; do
	case "$1" in
		"-r"|"--framerate")
			framerate="$2"
			shift
			shift
			;;
		"--mp4")
			format="mp4"
			shift
			;;
	esac
done

if [[ "$framerate" == "prompt" ]]; then
	framerate=$(echo -e "0.25\n0.5\n0.75\n1\n2\n5\n10" | rofi -dmenu -p Timeout)
fi

i=1
while read file; do
	extension="${file##*.}"
	number=$(printf "%03d" $i)
	echo "$number"
	cp "$file" "${tmpdir}file${number}.${extension}"
	i=$((i+1))
done

notify-send "Generating $format from images"

case "$format" in
	"mp4")
		# Not entierly sure what all of these mean but they make it work in most browsers
		ffmpeg -f image2 -framerate "$framerate" -i "${tmpdir}file%03d.${extension}" -pix_fmt yuv420p -vcodec libx264 -y -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" "${tmpdir}out.${format}"
		;;
	*)
		ffmpeg -f image2 -framerate "$framerate" -i "${tmpdir}file%03d.${extension}" "${tmpdir}out.${format}"
esac

mv "${tmpdir}out.${format}" "$HOME/Desktop/"

notify-send "Done" "File in $HOME/Desktop/out.${format}"