module Serpentor

# File lib/serpentor.rb, line 12
def self.configure
  self.configuration ||= Config.new
  yield(configuration)
end

# File lib/serpentor.rb, line 17
def self.rank(options={})
  keywords = options[:keywords]
  host = options[:host]
  limit = options[:limit]

  if configuration
    keywords ||= configuration.keywords
    host ||= configuration.host
    limit ||= configuration.limit
  end

  if keywords.nil? || host.nil?
    raise ArgumentError.new("keywords and host required")
  end

  results = []
  rank_options = {}
  rank_options[:limit] = limit if limit
  keywords = [keywords] if keywords.is_a?(String)

  keywords.each do |keyword|
    results << Rank.check(keyword, host, rank_options)
  end

  results
end