module Inch
  module CLI
    module Command
      module Options
        class BaseList < Base
          include API::Options::Filter::DefaultAttributeValues

          attribute :visibility, DEFAULT_VISIBILITY
          attribute :namespaces
          attribute :undocumented
          attribute :depth

          attribute :show_all, false
          alias_method :show_all?, :show_all

          def parse(args)
            opts = OptionParser.new
            opts.banner = usage

            descriptions.each do |text|
              opts.separator '  ' + text
            end

            set_options(opts)
            parse_yardopts_options(opts, args)
            parse_options(opts, args)

            @paths = get_paths(args)
          end

          def set_options(opts)
            list_options(opts)
            common_options(opts)

            yardopts_options(opts)
          end

          protected

          # Sets all list related options for the current Options object
          #
          # @param opts [OptionParser]
          # @return [void]
          def list_options(opts)
            opts.separator ''
            opts.separator 'List options:'

            opts.on('--all', 'Show all objects in the output') do
              @show_all = true
            end

            opts.on('--only-namespaces',
                    'Only show namespaces (classes, modules)') do
              @namespaces = :only
            end
            opts.on('--no-namespaces',
                    'Only show namespace children (methods, constants, ' \
                    'attributes)') do
              @namespaces = :none
            end

            opts.on('--no-public', 'Do not show public objects') do
              set_visibility :public, false
            end
            opts.on('--no-protected', 'Do not show protected objects') do
              set_visibility :protected, false
            end
            opts.on('--private', 'Show private objects') do
              set_visibility :private, true
            end

            opts.on('--only-undocumented', 'Only show undocumented objects') do
              @undocumented = :only
            end
            opts.on('--no-undocumented', 'Only show documented objects') do
              @undocumented = :none
            end

            opts.on('--depth [DEPTH]',
                    'Only show objects up to a given DEPTH ' \
                    'in the class tree') do |depth|
              @depth = depth.to_i
            end
          end

          # Sets the visibility of a given +kind+ of objects
          #
          # @example
          #   set_visibility :private, false
          #   set_visibility :protected, true
          #
          # @param kind [Symbol] +:public+, +:protected:, or +:private+
          # @param true_or_false [Boolean]
          # @return [void]
          def set_visibility(kind, true_or_false)
            @visibility ||= visibility.dup # initialize with attribute default
            if true_or_false
              @visibility.push(kind)
            else
              @visibility.delete(kind)
            end
          end
        end
      end
    end
  end
end