#!/usr/bin/env ruby
#
# Quick and dirty viewing of the forecast on the command line
#

require 'open-uri'

class Weather

  def initialize
    @zipcode = 10128
    @verbose = false
  end

  def real_main(argv)
    while not argv.empty?
      arg = argv.shift
      if arg == '-h' or arg == '-help'
        print_help
      elsif arg == '-v' or arg == '-verbose'
        @verbose = true
      else
        @zipcode = arg.to_i
      end
    end
    run
  end

  private

  def run
    log 'Using zipcode ' + @zipcode.to_s
    url = 'http://www.weather.com/outlook/travel/businesstraveler/local/' + @zipcode.to_s + '?lswe=' + @zipcode.to_s + '&lwsa=Weather36HourBusinessTravelerCommand&from=searchbox_localwx'
    content = open(url).read
    lines = content.split /\n/
    state = 0
    times = ['Today    : ', 'Tonight  : ', 'Tomorrow : ']
    forecast = nil
    type     = nil
    temp     = nil
    puts
    lines.each do |line|
      line.scan /<font class="blueFont10">([^<]+)</i do |res|
        forecast = res[0]
      end
      if forecast
        line.scan /<font class="blueVerdanaText11">([^<]+)<br>/i do |res|
          type = res[0]
        end
      end
      if type
        line.scan /<font class="obsTemp"><nobr>([^<]+)/ do |res|
          temp = res[0]
          temp = temp.gsub /&[^;]*;/, ''
        end
      end
      if forecast and type and temp
        time = times[state]
        state += 1
        puts time + forecast + ' ' + type + ' ' + temp
        forecast = nil
        type     = nil
        temp     = nil
      end
    end
  end

  def log(s)
    if @verbose
      STDERR.puts '*** ' + s
      STDERR.flush
    end
  end

  def print_help
    def e(s)
      STDERR.puts s
    end
    e 'Usage ' + File.basename($0) + ' <options>? <zipcode>?'
    e 'where options include'
    e '  -h || -help     print this message'
    e '  -v || -verbose  use verbose mode'
  end
  
end

def main(argv)
  Weather.new.real_main argv
end

main ARGV