require 'bundler'

module ConfigFixtures
  attr_reader :config_fixtures

  # @param [Symbol]
  # @return [String]
  def fixture_for(sym)
    config_fixtures[sym][:fixture]
  end
  alias_method :config_for, :fixture_for

  def path_for(sym)
    config_fixtures[sym][:path]
  end

  # @see ConfigFixtures#create_fixture_hash
  def config_fixtures
    @config_fixtures ||= begin
      hash = Hash.new { |k, v| k[v] = {} }
      hash.merge!(create_fixture_hash)
    end
  end

  # @return [Hash{Symbol => String}]
  def create_fixture_hash
    Hash[ find_fixtures.map { |fpath| map_fixture(fpath) }]
  end

  # @param [String]
  # @return [Array<Symbol, String>]
  def map_fixture(fpath)
    [symbolize_filename(fpath), { path: fpath, fixture: read_file(fpath) }]
  end

  # @return [Array<String>]
  def find_fixtures
    Dir.glob Bundler.root.join('spec/config_fixtures/**.cfg')
  end

  # @param [String]
  # @return [Symbol]
  def symbolize_filename(fpath)
    fname = File.basename(fpath)
    fname.split(/\W/).shift.to_sym
  end

  # @param [String]
  # @return [String]
  def read_file(fpath)
    File.read(fpath)
  end
end