#!/bin/sh

. ./_commands/_extract.sh

dir=$1 file=$2

content=$(cat "$dir/$file")

page=${file%.prop}

echo
echo "= $dir/$page.md"

if [ ! -e "$dir/$page.md" ]
then
	echo "Create file"
	echo "---
---
" > "$dir/$page.md"
fi

property="${content%: *}"

line_number=$(grep -n "$property:" "$dir/$page.md")
line_number="${line_number%%:*}"

case $property in
	*\[*\]*)
		line_offset=${property##*[}
		line_offset=${line_offset%%]*}

		property=${property%%[*}

		content="- ${content##*: }"

		line_number=$(grep -n "$property:" "$dir/$page.md")
		line_number="${line_number%%:*}"
		line_number=$((line_number+line_offset+1))

		# echo "line_offset: $line_offset"
esac

# echo "line_number: $line_number"
case $line_number in
	*[0-9]*)
		line=$(sed "$line_number!d" "$dir/$page.md")
		# echo "<= $line"
esac
# echo "=> $content"

if [ "$content" = "$property: " ] || [ "$content" = "- " ]
then
	echo "Delete property '$property'"
	operation=d
	content=

elif [ "$line" != "" ] && [ "${line%- *}" = "" ]
then
	echo "Updating nth element of property '$property'"
	operation=c

elif [ "$line_number" != "" ] && [ "${content%- *}" = "" ]
then
	if grep -q "^$property:" "$dir/$page.md"
	then
		echo "Insert nth element of property '$property'"
	else
		echo "Creating property $property"
		line_number=$(sed -n "/---/=" "$dir/$page.md" | tail -1)
		content="$property:\n$content"
	fi

	echo "=> $content"
	operation=i

elif grep -q "^$property: " "$dir/$page.md"
then
	echo "Updating property '$property'"
	operation=c

else
	echo "Create property '$property'"
	line_number=$(sed -n "/---/=" "$dir/$page.md" | tail -1)
	operation=i
fi

# See https://www.thegeekstuff.com/2009/11/unix-sed-tutorial-append-insert-replace-and-count-file-lines/
sed -i "$line_number $operation $content" "$dir/$page.md"

if [ "$property" = "title" ]
then
	echo "Reindexing pages"
	grep --include=*.md -or "title: .*" ../content/ | grep -v "pages.txt" | grep -v "users/" |
		grep -v "_index.md" | grep -o "content/.*" | grep -o "/.*" > ../content/pages.txt
fi