module Bootstrap

def assets_path
  @assets_path ||= File.join gem_path, 'assets'
end

def gem_path
  @gem_path ||= File.expand_path '..', File.dirname(__FILE__)
end

def hanami?
  defined?(::Hanami)
end

def javascripts_path
  File.join assets_path, 'javascripts'
end

def load!
  if rails?
    register_rails_engine
  elsif hanami?
    register_hanami
  elsif sprockets?
    register_sprockets
  elsif defined?(::Sass) && ::Sass.respond_to?(:load_paths)
    # The deprecated `sass` gem:
    ::Sass.load_paths << stylesheets_path
  end
  if defined?(::Sass::Script::Value::Number)
    # Set precision to 6 as per:
    # https://github.com/twbs/bootstrap/blob/da717b03e6e72d7a61c007acb9223b9626ae5ee5/package.json#L28
    ::Sass::Script::Value::Number.precision = [6, ::Sass::Script::Value::Number.precision].max
  end
end

def rails?
  defined?(::Rails)
end

def register_hanami
  Hanami::Assets.sources << assets_path
end

def register_rails_engine
  require 'bootstrap/engine'
end

def register_sprockets
  Sprockets.append_path(stylesheets_path)
  Sprockets.append_path(javascripts_path)
end

def sprockets?
  defined?(::Sprockets)
end

def stylesheets_path
  File.join assets_path, 'stylesheets'
end