require "mail"

class TariffsMailer
    
  SSL_OPTS = {
      :openssl_verify_mode => OpenSSL::SSL::VERIFY_NONE,
  }  
  
                   
  #
  # Class methods
  #
  class << self
    def deliver(date)     
      # Read SMTP options from smtp.yml
      smtp_opts = YAML::load(File.open('config/smtp.yml')).symbolize_keys
      smtp_opts.merge!(SSL_OPTS) if smtp_opts[:ssl] && smtp_opts[:ssl_verify_mode].eql?("none")
      
      # Create png file
      c = Cost.new
      c.easy_energy_tariff_barplot(date)
      
      mail = Mail.new do
        delivery_method :smtp, smtp_opts
        to      ['Mannetje <aart@van-halteren.net>','Vrouwtje <irene@van-halteren.net>']
        from    'SmartMeter <aart@van-halteren.net>'
        subject "EasyEnergy tariffs for #{date}"

        text_part do
          body "Tariffs for #{date}\n"
        end
      
        html_part do
          content_type 'text/html; charset=UTF-8'
          body "<h1>Tariffs for #{date} </h>"
        end 
        
        # add attachment
        filename = "easy_tariff_%s.png" % date.strftime("%F")
        add_file :filename => filename, :content => File.read("plots/%s" % filename) 
      end
      
      mail.deliver!
    end
  end
end