#!/usr/bin/env fish

set watermark watermark.tex
set preface preface.pdf

function gen_watermark
	set -l id (random)
	cat "$watermark" | string replace -a "{{person}}" "$argv[1]" > "$id.tex"
	pdflatex "$id.tex" > /dev/null
	pdflatex "$id.tex" > /dev/null #run twice for transparency
	# remove log and aux file
	rm $id.aux $id.log $id.tex
	echo "$id.pdf"
end

function assemble
	set -l id (random)
	set watermark_file (gen_watermark $argv)
	echo pdftk "$argv[2]" stamp "$watermark_file" output "$id.pdf"
	pdftk "$argv[2]" stamp "$watermark_file" output "$id.pdf"
	pdftk "$preface" "$id.pdf" output "$id"-marked.pdf 
	# clean up files
	rm "$watermark_file"
	rm "$id.pdf"
	echo "$id"-marked.pdf
end

assemble $argv