#!/bin/sh

name=`basename "$0"`
configFilePath="$XMD_USERDIR/wallpaper"

isInstalled() {
	type "$1" > /dev/null
}

shouldHaveInstalled() {
	if ! isInstalled "$1"; then
		echo "$name: $1 is not installed" >&2
		return 1
	fi
}

usage() {
	echo "Usage: $name" >&2
	exit 2
}

[ "$#" -gt 0 ] && usage

echo $configFilePath
if type "$configFilePath" > /dev/null; then
	color="black"
	
	while read -r line; do
		line=`echo $line | sed s/\#.\*$//g`
		[ -z "$line" ] && continue
		
		IFS="=" read key value << EOF
$line
EOF
		case "$key" in
		"mode")  mode="$value";;
		"file")  file="$value";;
		"color") color="$value";;
		*)       echo "$name: bad key $key in $configFilePath" >&2;;
		esac
	done < "$configFilePath"

	case "$mode" in
	"" | center | focus | maximize | stretch | tile | zoom) ;;
	*)
		echo "$name: bad mode $mode" >&2
		exit 1
		;;
	esac
	
	[ -n "$color" ] && shouldHaveInstalled xsetroot   && \
		xsetroot -solid "$color"
	[ -n "$mode"  ] && shouldHaveInstalled xwallpaper && \
		xwallpaper "--${mode}" "$file"
fi