#! /bin/bash

header='
===================
 Service Catalogue
===================
'

mangle_sed='
/^\\.\\.[ \\t]contents::/d
s,\\(image::[[:space:]]*\\)\\(.*\\),\\1%s/\\2,
s,\\(figure::[[:space:]]*\\)\\(.*\\),\\1%s/\\2,
'

# mangle_input [basedir]
#
mangle_input ()
{
	local program
	printf -v program "${mangle_sed}" "$1" "$1"
	sed -e "${program}"
}


longest ()
{
	local -i len=0
	local item
	for item in "$@" ; do
		[[ ${#item} -gt ${len} ]] && len=${#item}
	done
	echo "${len}"
}


sects=( )
texts=( )
title=( )

echo "${header}"
while read -r item ; do
	if [[ ${item} = \#* ]] ; then
		continue
	elif expr "${item}" : '^[[:space:]]*$' &> /dev/null ; then
		continue
	else
		# Gather data
		read -r sect text <<< "${item}"
		title=( "${title[@]}" "$(head -n 1 "${sect}/${sect}.rst")" )
		sects=( "${sects[@]}" "${sect}" )
		texts=( "${texts[@]}" "${text}" )
	fi
done

repeat_char ()
{
	local i
	for (( i=0; i < $2 ; i++ )) ; do
		echo -n "$1"
	done
}

title_longest=$(longest "${title[@]}")
title_longest=$((title_longest + 3))
title_sub=$(repeat_char '=' ${title_longest})

printf "%-${title_longest}s ================\n" "${title_sub}"
printf "%-${title_longest}s Person in charge\n" "Section"
printf "%-${title_longest}s ================\n" "${title_sub}"
for (( i=0 ; i < ${#title[@]} ; i++ )) ; do
	printf "%-${title_longest}s %s\n" "\`${title[$i]}\`_" "${texts[$i]}"
done
printf "%-${title_longest}s ================\n" "${title_sub}"

printf "\n.. contents::\n\n"

for sect in "${sects[@]}" ; do
		mangle_input "$(dirname "${sect}/${sect}.rst")" < "${sect}/${sect}.rst"
		echo
done