#!/bin/bash

WEATHER_CACHE_DIR="/home/melvin/.cache/weather"
CACHEFILE=$WEATHER_CACHE_DIR"/current_weather.png"
CACHE_ONELINE=$WEATHER_CACHE_DIR"/current_weather_oneline.txt"
TIME=""
OPTION=$2

usage() {
	echo "Usage: $0 (help|update|show|get|reload|full|dark|text) [:help|p|q]"
	echo "  help    :   show this page
  show    :   show picture according to time
  get     :   get image from wttr.in
  reload  :   get and show
  text    :   print one line text
  clear   :   clear text cache
  example: weather f 'Kitchener_0pq'
           weather f moon
" >&2
	exit 0
}

onlyprinttext() {
	info=$(cat $CACHE_ONELINE)
	case $info in
	*DOCTYPE*) echo " n/a" ;;
	*) echo $info ;;
	esac
}

get_image() {
	hasnet || exit 1
	(curl -f -s 'wttr.in/Tübingen_1pq.png' || echo "ERR") >$CACHEFILE
	(curl -f -s 'wttr.in/Tübingen?format=%t' || echo "ERR") >$CACHE_ONELINE
}

show_image() {
	if [ ! -e $CACHEFILE ]; then
		get_image
	fi

	n30f -t weather $CACHEFILE
}

# main
if [ ! -d $WEATHER_CACHE_DIR ]; then
	mkdir $WEATHER_CACHE_DIR
	get_image
fi
case "$1" in
h | -h* | --h*) usage ;;
show | s) show_image ;;
get | g) get_image ;;
reload | r) get_image && show_image ;;
text | t) onlyprinttext ;;
*)
	onlyprinttext
	usage
	;;
esac