#!/bin/zsh

MODS_DIR="${HOME}/World of Warcraft/Interface/AddOns"
TMP_DIR="/tmp"
EXTERNALS=0

list_file="$TMP_DIR/ace2_mods.txt"
wget "http://www.wowace.com/files/descript.ion" --quiet -O "$list_file"
if [[ $? -ne 0 ]]; then
	echo "error: could not download description file"
	exit 1
fi

typeset -A ace2mods
IFS="	
"
while read mod desc; do
	ace2mods[$mod]=$desc
done < "$list_file"

rm "$list_file"

typeset -a localmods
for mod in "$MODS_DIR/"*(/); do
	mod=${mod:t}
	if [[ -n $ace2mods[$mod] ]]; then
		localmods+=($mod)
	fi
done

for mod in $localmods[@]; do
	echo "$mod"
	rev_file="$TMP_DIR/rev.txt"
	wget "http://www.wowace.com/files/$mod/latest.txt" --quiet -O "$rev_file" || continue
	read rev < "$rev_file"
	rm "$rev_file"
	if [[ -e "$MODS_DIR/$mod/changelog-r$rev.txt" ]]; then
		continue
	fi

	echo "  Downloading $mod-r$rev.zip"
	zipfile="$TMP_DIR/ace2_addon.zip"
	if [[ $EXTERNALS -eq 1 ]]; then
		url="http://www.wowace.com/files/$mod/$mod-r$rev.zip"
	else
		url="http://www.wowace.com/files/$mod/no-ext/$mod-r$rev.zip"
	fi
	wget "$url" --quiet -O "$zipfile"
	if [[ $? -ne 0 ]]; then
		echo "  Download failed"
		continue
	fi

	mv "$MODS_DIR/$mod" "$MODS_DIR/$mod.bak"
	unzip -qq -d "$MODS_DIR" "$zipfile"
	res=$?
	rm "$zipfile"
	if [ $res -ne 0 ]; then
		echo "  Unzip failed"
		mv "$MODS_DIR/$mod.bak" "$MODS_DIR/$mod"
	else
		echo "  Updated $mod to revision $rev"
		rm -r "$MODS_DIR/$mod.bak"
	fi
done