#!/bin/bash

if [ -z "$1" -o ! -d "$1" ]; then
    echo "Usage: $0 <top-directory> [<days ago>]" 1>&2
    exit 1
fi

top="${1}"
shift

source "${top}/etc/settings.sh"
tmp="$(mktemp -d)"
cd "${tmp}"

export LANG=C
export LC_ALL=C
export LC_TIME=C

SEARCH_DATE=`date -d "$daysago days ago 00:00:00" +%b.%d.%y`
CID=`wget ${wget_args} -O - "http://www.smbc-comics.com/archives.php" | grep -oE 'value="([^"]+)">'$SEARCH_DATE | sed -nre 's#value="([^"]+).+#\1#p' | head -n1`

if [ -n "$CID" ]; then
	echo "CID is '$CID'"
	COMIC_LINE=`wget ${wget_args} -O - "http://www.smbc-comics.com/index.php?id="$CID | grep 'id="comicbody"'`
	echo "Comic line is $COMIC_LINE"

	COMIC_URL=`sed -nre 's#.+src="(comics/.+.png)".+#\1#p' <<<$COMIC_LINE`
	COMIC_TITLE=`sed -nre 's#.+title="([^"]+)".+#\1#p' <<<$COMIC_LINE`

	echo "  url is $COMIC_URL"
	echo "  title is $COMIC_TITLE"

	if [ -n $COMIC_URL ]; then
		wget ${wget_args} -O "$day.png" http://www.smbc-comics.com/$COMIC_URL
		if [ -s "${day}.png" ]; then
			mv ${day}.png "${image_dir}/$day.png"
			echo "$COMIC_TITLE" > "${image_dir}/$day.title"
			rm -f "${comic_dir}/latest.png"
			ln -s "${image_offset}/$day.png" "${comic_dir}/latest.png"
		fi
	fi
fi

echo "tmp"
rm -rf "${tmp}"
echo "Done"