#!/usr/bin/env ruby
# Copyright (c) 2018-2019 Yegor Bugayenko
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the 'Software'), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

STDOUT.sync = true

require 'slop'
require 'mail'
require 'net/smtp/proxy'
require_relative '../lib/rumble'
require_relative '../lib/rumble/version'

begin
  args = []
  config = File.expand_path('~/.rumble')
  if File.exist?(config)
    body = File.read(config)
    extra = body.split(/[\r\n]+/).map(&:strip)
    args += extra
    puts "Found #{body.split(/\n/).length} lines in #{config}"
  else
    puts "Default config file #{config} not found"
  end
  args += ARGV

  begin
    opts = Slop.parse(args, strict: true, help: true) do |o|
      o.banner = "Usage (#{Rumble::VERSION}): rumble [options]"
      o.bool '--help', 'Show these instructions' do
        puts o
        exit
      end
      o.bool '-v', '--version', 'Show current version' do
        puts Rumble::VERSION
        exit
      end
      o.bool '--dry', 'Dry run, no emails will be delivered'
      o.string '--from',
        'Full SMTP From field, e.g. "John Doe <jd@example.com>"',
        required: true
      o.string '--method',
        'How to deliver them: "smtp" or "sendmail" (default: sendmail)',
        default: 'sendmail'
      o.string '--host', 'SMTP host name'
      o.string '--port', 'SMTP port number (25 by default)', default: 25
      o.string '--user', 'SMTP user name'
      o.string '--password', 'SMTP password'
      o.string '--proxy', 'HTTP proxy, e.g. "192.168.0.1:8080"'
      o.string '--subject', 'Email subject', required: true
      o.string '--letter', 'File name with Liquid template', required: true
      o.string '--csv', 'CSV file with first name, last name, and email cols'
      o.string '--resume', 'Email address from which we should resume'
      o.string '--skip', 'File name with emails that opted-out (black list)'
      o.string '--test', 'Email address to use instead of the real user list'
      o.string '--col-first', 'First name columm (0 by default)', default: 0
      o.string '--col-last', 'Last name columm (1 by default)', default: 1
      o.string '--col-email', 'Email columm (2 by default)', default: 2
    end
  rescue Slop::Error => ex
    raise "#{ex.message}, try --help"
  end

  Encoding.default_external = Encoding::UTF_8
  Encoding.default_internal = Encoding::UTF_8

  puts 'It is "dry" run, no emails will be actually sent!' if opts[:dry]

  Mail.defaults do
    case opts[:method].downcase.strip
    when 'sendmail'
      puts "--host=#{opts[:host]} is not allowed w/sendmail" if opts[:host]
      puts "--port=#{opts[:port]} is not allowed w/sendmail" if opts[:port]
      puts "--user=#{opts[:user]} is not allowed w/sendmail" if opts[:user]
      puts '--password is not allowed when using sendmail' if opts[:password]
      delivery_method :sendmail
    when 'smtp'
      raise '--host is required' unless opts[:host]
      raise '--port is required' unless opts[:port]
      raise '--user is required' unless opts[:user]
      raise '--password is required' unless opts[:password]
      if opts[:proxy]
        host, port = opts[:proxy].strip.split(':')
        delivery_method Net::SMTP::Proxy::DeliveryMethod, {
          address: opts[:host],
          port: opts[:port],
          proxy_address: "http://#{host.strip}",
          proxy_port: port,
          openssl_verify_mode: OpenSSL::SSL::VERIFY_NONE,
          domain: 'gmail.com'
        }
      else
        delivery_method :smtp, {
          :address => opts[:host],
          :port => opts[:port],
          :user_name => opts[:user],
          :password => opts[:password],
          :enable_starttls_auto => true
        }
      end
    else
      raise "Delivery method #{opts[:method]} is not supported"
    end
  end
  Rumble::CLI.new(opts).send
rescue StandardError => ex
  puts "#{Rainbow('ERROR').red} (#{ex.class.name}): #{ex.message}"
  puts ex.backtrace
  exit(255)
end