module InvisibleCaptcha

# File lib/invisible_captcha.rb, line 73
def css_strategy
  [
    "display:none;",
    "position:absolute!important;top:-9999px;left:-9999px;",
    "position:absolute!important;height:1px;width:1px;overflow:hidden;"
  ].sample
end

# File lib/invisible_captcha.rb, line 81
def encode(value)
  Digest::MD5.hexdigest("#{self.secret}-#{value}")
end

# File lib/invisible_captcha.rb, line 65
def generate_random_honeypot
  "abcdefghijkl-mnopqrstuvwxyz".chars.sample(rand(10..20)).join
end

# File lib/invisible_captcha.rb, line 69
def get_honeypot
  honeypots.sample
end

# File lib/invisible_captcha.rb, line 22
def init!
  # Default sentence for real users if text field was visible
  self.sentence_for_humans = -> { I18n.t('invisible_captcha.sentence_for_humans', default: 'If you are a human, ignore this field') }

  # Timestamp check enabled by default
  self.timestamp_enabled = true

  # Fastest time (in seconds) to expect a human to submit the form
  self.timestamp_threshold = 4

  # Default error message for validator when form submitted too quickly
  self.timestamp_error_message = -> { I18n.t('invisible_captcha.timestamp_error_message', default: 'Sorry, that was too quick! Please resubmit.') }

  # Make honeypots visibles
  self.visual_honeypots = false

  # If enabled, you should call anywhere in your layout the following helper, to inject the honeypot styles:
  # <%= invisible_captcha_styles %>
  self.injectable_styles = false

  # Spinner check enabled by default
  self.spinner_enabled = true

  # A secret key to encode some internal values
  self.secret = ENV['INVISIBLE_CAPTCHA_SECRET'] || SecureRandom.hex(64)
end

# File lib/invisible_captcha.rb, line 49
def sentence_for_humans
  call_lambda_or_return(@sentence_for_humans)
end

# File lib/invisible_captcha.rb, line 57
def setup
  yield(self) if block_given?
end

# File lib/invisible_captcha.rb, line 53
def timestamp_error_message
  call_lambda_or_return(@timestamp_error_message)
end

# File lib/invisible_captcha.rb, line 87
def call_lambda_or_return(obj)
  obj.respond_to?(:call) ? obj.call : obj
end