module Uncharted

  class Country

    attr_reader :alpha2, :alpha3, :name
    alias :code :alpha2

    def initialize(alpha2, alpha3 = nil, name = nil)
      @alpha2 = alpha2
      @alpha3 = alpha3
      @name   = name
      self.class.data[alpha2] = self
    end
    
    def inspect
      "#{@alpha2}: '#{@name}'"
    end

    def name(options = {})
      I18n.t("countries.#{@alpha2}", {locale: options[:locale] || I18n.locale, default: @name})
    end
    
    def names
      @names ||= Country.split_name(@name)
    end
    
    def to_s
      @alpha2
    end

    def self.count
      countries.count
    end

    def self.find(objects)
      case objects
      when Array
        objects.collect {|c| data[c]}
      when Country
        objects
      else # code
        code = objects.to_s
        code.upcase!
        data[code]
      end
    end
    
    def self.find_by_name(name)
      closest = [nil, 0]
      @data.each do |code, country|
        return country if country.name == name
        intersection = country.names & Country.split_name(name)
        size = intersection.size
        return country if size == country.names.size
        closest = [country, size] if closest.last < size 
      end
      return closest.first
    end

    def self.countries
      @data.values
    end

    def self.data
      @data ||= {}
    end
    
    def self.split_name(name)
      name = I18n.transliterate(name)
      name.downcase!
      name.split
    end
        
  end

end