#!/bin/sh
set -euo pipefail


usage() {
	echo 'Usage: htmlbody FILENAME.adoc'
}

FILENAME="${1:-}"
eval "$(assert-arg -- "$FILENAME" 'FILENAME.adoc')"


plaintext_links() {
	awk -v BASE="$(basename "$FILENAME" .adoc)".html l'
	{ print }
	/^----$/ {
		in_block = !in_block
		if (in_block) {
			next
		}
		file = BASE "." count++ ".txt"
		print "[role=plaintext]"
		print "link:" file "[plaintext]"
	}' "$1"
}

indent_4_blocks() {
	printf '<div><div><div><div>%s</div></div></div></div>' "$(cat -)" |
	tidy -quiet -indent -xml |
	head -n -4 |
	tail -n +5
}

plaintext_links "$FILENAME" | asciidoctor -s - | indent_4_blocks