module Recaptcha

# File lib/recaptcha.rb, line 84
def self.action_valid?(action, expected_action)
  case expected_action
  when nil, FalseClass then true
  else action == expected_action
  end
end

# File lib/recaptcha.rb, line 102
def self.api_verification(verify_hash, timeout: DEFAULT_TIMEOUT)
  http = if configuration.proxy
    proxy_server = URI.parse(configuration.proxy)
    Net::HTTP::Proxy(proxy_server.host, proxy_server.port, proxy_server.user, proxy_server.password)
  else
    Net::HTTP
  end
  query = URI.encode_www_form(verify_hash)
  uri = URI.parse(configuration.verify_url + '?' + query)
  http_instance = http.new(uri.host, uri.port)
  http_instance.read_timeout = http_instance.open_timeout = timeout
  http_instance.use_ssl = true if uri.port == 443
  request = Net::HTTP::Get.new(uri.request_uri)
  JSON.parse(http_instance.request(request).body)
end

# File lib/recaptcha.rb, line 26
def self.configuration
  @configuration ||= Configuration.new
end

# File lib/recaptcha.rb, line 36
def self.configure
  config = configuration
  yield(config)
end

# File lib/recaptcha.rb, line 74
def self.hostname_valid?(hostname, validation)
  validation ||= configuration.hostname

  case validation
  when nil, FalseClass then true
  when String then validation == hostname
  else validation.call(hostname)
  end
end

# File lib/recaptcha.rb, line 58
def self.invalid_response?(resp)
  resp.empty? || resp.length > RESPONSE_LIMIT
end

# File lib/recaptcha.rb, line 92
def self.score_above_threshold?(score, minimum_score)
  return true if minimum_score.nil?
  return false if score.nil?

  case minimum_score
  when nil, FalseClass then true
  else score >= minimum_score
  end
end

# File lib/recaptcha.rb, line 54
def self.skip_env?(env)
  configuration.skip_verify_env.include?(env || configuration.default_env)
end

# File lib/recaptcha.rb, line 62
def self.verify_via_api_call(response, options)
  secret_key = options.fetch(:secret_key) { configuration.secret_key! }
  verify_hash = { 'secret' => secret_key, 'response' => response }
  verify_hash['remoteip'] = options[:remote_ip] if options.key?(:remote_ip)

  reply = api_verification(verify_hash, timeout: options[:timeout])
  reply['success'].to_s == 'true' &&
    hostname_valid?(reply['hostname'], options[:hostname]) &&
    action_valid?(reply['action'], options[:action]) &&
    score_above_threshold?(reply['score'], options[:minimum_score])
end

# File lib/recaptcha.rb, line 41
def self.with_configuration(config)
  original_config = {}

  config.each do |key, value|
    original_config[key] = configuration.send(key)
    configuration.send("#{key}=", value)
  end

  yield if block_given?
ensure
  original_config.each { |key, value| configuration.send("#{key}=", value) }
end