class Cellsynt

# File lib/cellsynt.rb, line 12
def initialize(username = nil, password = nil)
  @endpoint = 'https://se-1.cellsynt.net/sms.php'

  @auth = {
    username: username || ENV['cellsyntUser'],
    password: password || ENV['cellsyntPass']
  }

  @config = {
    destination: nil,
    allowconcat: nil, # Values: 1 - 6
    originator: nil,  # Values: numeric, shortcode & alpha
    expiry: nil,      # Value: Unix timestamp
    text: nil,        # Type: String
    udh: nil,         # Type: Hex

    originatortype: 'numeric', # Values: numeric, shortcode & alpha
    charset: 'UTF-8',          # Values: ISO-8859-1 & UTF-8, Standard: ISO-8859-1
    type: 'text',              # Values: text, binary & unicode, Standard: text
    flash: false,              # Values: true, false
    class: 1,                  # Values: 0 - 3, Standard: 1
    pid: 00                    # Type: Hex, Standard: 00
  }.compact
end

# File lib/cellsynt.rb, line 37
def adjust_concat(message)
  return nil if message.chars.length > SMS_CONCAT_HARD_LIMIT

  if message.chars.length > SMS_CHAR_LIMIT
    message_size = message.chars.length

    (1..6).each do |index|
      if (index * SMS_CONCAT_CHAR_LIMIT) >= message_size
        return index
      end
    end
  end
end

# File lib/cellsynt.rb, line 51
def format_destination(number)
  number.delete_prefix('0')
  number.dup.prepend('0046')
end

# File lib/cellsynt.rb, line 56
def format_originator(number)
  number.delete_prefix('0')
  number.dup.prepend('46')
end

# File lib/cellsynt.rb, line 61
def send
  uri = URI(@endpoint)
  req = Net::HTTP::Post.new(uri)

  config[:allowconcat] = adjust_concat(@config[:text])
  config[:destination] = format_destination(@config[:destination])
  config[:originator] = format_originator(@config[:originator])

  form_data = @auth.merge(@config)
  req.set_form_data(form_data)

  res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true, timeout: 300) do |packet|
    packet.request(req)
  end

  res.body
end