require 'reap/task'

require 'net/smtp'
require 'facet/string/margin'
require 'facet/string/tab'
require 'facet/string/align_center'
require 'facet/string/fold'
require 'facet/string/word_wrap'

#    _                                    _____        _
#   /_\  _ _  _ _  ___ _  _ _ _  __ ___  |_   _|_ _ __| |__
#  / _ \| ' \| ' \/ _ \ || | ' \/ _/ -_)   | |/ _` (_-< / /
# /_/ \_\_||_|_||_\___/\_,_|_||_\__\___|   |_|\__,_/__/_\_\
#

# = Announcement Task
#
# The announce task is intended for sending out a nice
# formated email message to a mailing address, especially
# mailing-lists. ProjectInfo uses these parameters:
#
#   announce:
#     server       Email server to route message.
#     port         Email server's port.
#     domain       Email server's domain name.
#     account      Email account name.
#     type         Login type, either plain, cram_md5 or login.
#     secure       Uses TLS security, true or false?
#     to           Email address to send announcemnt.
#     from         Email address sent from.
#     subject      Subject of email message.
#     title        Project title.
#     summary      Brief onl-liner description.
#     description  Long description of project.
#     homespage    Project homepage web address.
#     links        Array of http links to related sites.
#     file         File that contains announcement message.
#     memo         Embedded announcement message.
#     slogan:      Motto for you project.
#
class Reap::Announce < Reap::Task

  section_required true

  task_desc "Email project announcement."

  task_help %{

    reap announce

    Send an announcement to a mailaing list or other email address.

    Server settings are

      server       Email server to route message.
      port         Email server's port.
      domain       Email server's domain name.
      account      Email account name.
      type         Login type, either plain, cram_md5 or login.
      secure       Uses TLS security, true or false?

    Message settings are

      to           Email address to send announcemnt.
      from         Email address sent from.
      subject      Subject of email message.
      file         File that contains announcement message.
      memo         Embedded announcement message.

  }

  alias_method :anc, :task

  def run

    # setup

    anc.to       = (anc.to || 'ruby-talk@ruby-lang.org').to_s.strip
    anc.from     = (anc.from || master['email']).to_s.strip
    anc.server   = anc.server.to_s.strip
    anc.port     = (anc.port || 25).to_i
    anc.domain   = anc.domain.to_s.strip if anc.domain
    anc.account  = anc.account.to_s.strip
    anc.type     = (anc.type || 'plain').to_s.strip  #cram_md5 #plain #login

    raise "server is a require announce field" if anc.server.empty?
    raise "account is a require announce field" if anc.account.empty?

    anc.title       ||= master.title
    anc.version     ||= master.version || master.date
    anc.links       ||= []
    anc.subject     ||= "[ANN] #{anc.title}, v#{anc.version}"

    anc.address = anc.to  # TODO

    # validate

    #raise "DOMAIN is a required field" if anc.domain.empty?

    # announce

    message = build_message

    puts "\n#{message}\n\n"
    print "Send? [y/N] "
    until inp = $stdin.gets[0,1] ; sleep 1 ; end

    unless inp.downcase == 'y'
      puts "Reap announce task canceled."
      return nil
    end

    # ask for password
    print "Password for #{anc.account}: "
    until passwd = $stdin.gets.strip ; sleep 1 ; end

    mail = %Q{
      |From: #{anc.from}
      |To: #{anc.address}
      |Subject: #{anc.subject}
      |
      |#{message}
      }.margin
    begin
      # --- Send using SMTP object and an adaptor
      Net::SMTP.enable_tls if Net::SMTP.respond_to?(:enable_tls) and anc.secure # == :tls
      Net::SMTP.start(anc.server, anc.port, anc.domain, anc.account, passwd, anc.type) do |s|
        s.send_message mail, anc.from, anc.address
      end
      puts "Email sent successfully to #{anc.address}."
    rescue => e
      puts "Email delivery failed."
      puts e
    end

  end

private

  def build_message

    # header
    announce = %Q{
      |
      |A N N O U N C I N G
      |
      |#{anc.title}, v#{anc.version}
      |
      |#{anc.summary}
      |
      |#{anc.homepage}
      }.margin.align_center(66)

    # abstract
    abstract = ''
    if anc.description
      abstract << "\n\n"
      abstract << "ABSTRACT\n------------->\n\n#{anc.description}"
      abstract << "\n"
    end

    # more info
    info = ''
    unless anc.links.empty?
      info << "\n\n"
      info << "\nRELATED LINKS\n------------------>\n\n" #.center(67)
      anc.links.each{ |mi| info << "#{mi}" << "\n" } #.center(67) << "\n" }
      info << "\n"
    end

    # slogan
    slogan = ''
    if anc.slogan
      slogan << "\n\n"
      slogan << anc.slogan.center(67)
      slogan << "\n\n"
    end

    # memo
    memo = ''
    if anc.memo
      memo = ''
      #memo << "\n---\n" #<< ('-' * 72) << "\n"
      memo << "\nRELEASE MEMO\n----------------->\n\n"
      memo << anc.memo.strip.fold(true) #.word_wrap(67)
      #memo << "\n"
    end

    # msg file
    msg = ''
    if anc.file and File.file?( anc.file )
      msg << "\nRELEASE MEMO\n----------------->\n\n"
      #msg << "\n---\n" #<< ("-" * 68) << "\n"
      #msg << "(from #{anc.file})\n\n"
      mg = File.read( anc.file )
      msg << mg.strip.fold(true) #.word_wrap(67)
    end

    # stamp
    stamp = "\n\n\n"
    #stamp << "\n\n---\n" #<< ("-" * 68) << "\n"
    stamp << %Q{
      |               Generated by
      |
      |     o)o)o)    o)o)o)o)    o)o)    o)o)o)
      |    o)    o)  o)        o)    o)  o)    o)
      |   o)o)o)    o)o)o)    o)o)o)o)  o)o)o)
      |  o)    o)  o)        o)    o)  o)
      | o)    o)  o)o)o)o)  o)    o)  o)
      |
      |       The Ruby Project Assistant
      |
      | Do you Ruby? (http://www.ruby-lang.org)
      }.margin.indent(12)
    stamp << "\n"

    message = ''
    message << announce
    message << slogan
    message << abstract
    message << memo
    message << msg
    message << info
    message << stamp

    message
  end

end