with import <nixpkgs> {};

pkgs.writeShellScriptBin "plans-backend" ''
	#!/bin/sh
	if [ "$1" = "help" ] ; then
		echo "plans (tudbut)"
		echo
		echo "- add <str>  -- add to end of list"
		echo "- done [n]   -- remove from list"
		echo "- edit       -- edit manually using helix"
		echo "default prints list"
		echo
		echo "file used is $file"
		exit
	fi
	if [ "$1" = "add" ] ; then
		echo "- $2" >> $file
	fi
	if [ "$1" = "done" ] ; then
	  if [ "$2" != "" ] ; then
			head -n $(($2 - 1)) $file > ~/plans.txt.tmp
			tail -n"$(($(wc -l < $file) - $2))" $file >> ~/plans.txt.tmp
		else
			tail -n"$(($(wc -l < $file) - 1))" $file > ~/plans.txt.tmp
		fi
		mv ~/plans.txt.tmp $file
	fi
	if [ "$1" = "edit" ] ; then
		hx $file
	fi
	cat -n $file
''