#!/usr/bin/env bash

tmp="${XDG_RUNTIME_DIR:-${TMPDIR:-/tmp}}"
tmp="$(mktemp -d "${tmp}/freezhot.XXXX")"
out="${GRIM_DEFAULT_DIR:-${XDG_PICTURES_DIR:-.}}"

wl_res()
{
	swaymsg -pt get_outputs | while read -r line; do
		case "$line" in
		"Current mode"*)
			line="${line#*Current mode: }"
			echo "${line%% *}"
			return
		esac
	done
}

########
# MAIN #
########

if [ ! -d "$out" ]; then
	mkdir -p "$out"
fi
GRIM_DEFAULT_DIR="$tmp" grim
trap 'rm -r "$tmp"' EXIT
imv -f "$tmp"/* &
view_pid=$!

region=$(slurp -f '%wx%h %x:%y') > /dev/null 2>&1
r=$?
kill $view_pid
if [ $r != 0 ]; then
	exit 1
fi

img="$(ls "$tmp")"
res="${region% *}"
if [ "$res" = "$(wl_res)" ]; then
	cp "$tmp/$img" "$out"
else
	width=${res%x*}
	hight="${res#*x}"
	position="${region#* }"
	ffmpeg \
		-loglevel quiet \
		-i "$tmp/$img" \
		-vf "crop=$width:$hight:$position" \
		"$out/$img"
fi