#!/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
  full    :   curl wttr.in [:help|p|q]
  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 -s 'wttr.in/Tübingen_1pq.png' > $CACHEFILE
  curl -s 'wttr.in/?format=%t' > $CACHE_ONELINE
}

print_detail() {
  echo curl -s "wttr.in/"$OPTION
  curl -s "wttr.in"/$OPTION
}

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 ;;
  full|f)        print_detail; OPTION=$2;;
  text|t)        onlyprinttext;;
  *)             onlyprinttext; usage;;
esac