require 'build-tool/commands'

module BuildTool; module Commands;

    #
    # BuildCommand
    #
    class Lsfeatures < Standard

        name        "lsfeatures"
        description "List all available features."
        long_description [ "Shows the list of all features available with the current recipe or",
                           "detailed info about one or more features given as arguments." ]

        def initialize_options
            @options.banner = "Usage: #{Pathname.new($0).basename} #{self.fullname} [FEATURES]..."
            super
        end

        def applicable?
            BuildTool::Application.instance.name != "build-tool"
        end

        def do_execute( args )
            if args.length > 1
                # *TODO* print better message
                return usage "To many arguments."
            end

            if args.length == 1
                return show_feature( args[0] )
            else
                return list_features
            end
        end

        def list_features
            say "%-30s| %s | %s" % [ "Feature", "A", "Description" ]
            say "==========================================================="
            features = configuration.features
            features.keys.sort.each do |name|
                feature = features[name]
                # Skip feature without modules
                next if feature.modules.empty?
                active = "N"
                active = "Y" if feature.active?
                say "%-30s| %s | %s" % [ name, active, feature.description ]
            end

            return 0
        end

        def show_feature( name )
            feature = configuration.features[name]

            if feature.nil?
                logger.error( "Unknown feature '%s'" % name )
                return -1
            end

            say "Name    : %s" % feature.path
            say "Modules"
            say "===================================================="
            feature.modules.each do |mod|
                next if mod.is_template?
                say "  %-20s: %s" % [ mod.name, mod.description ]
            end
            return 0
        end

    end # class Info

end; end # module BuildTool::Commands