#
# Copyright (c) 2009-2012 Hal Brodigan (postmodern.mod3 at gmail.com)
#
# This file is part of Ronin Gen.
#
# Ronin Gen is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ronin Gen is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ronin Gen.  If not, see <http://www.gnu.org/licenses/>.
#

require 'ronin/ui/cli/command'
require 'ronin/gen/file_generator'
require 'ronin/gen/dir_generator'
require 'ronin/gen/gen'
require 'ronin/gen/version'

require 'parameters/options'

module Ronin
  module UI
    module CLI
      module Commands
        #
        # Runs or lists available generators.
        #
        # ## Usage
        #
        #     ronin-gen [[options] | GENERATOR [generator-options]]
        #
        # ## Options
        #
        #     -v, --[no-]verbose               Enable verbose output.
        #     -q, --[no-]quiet                 Disable verbose output.
        #         --[no-]silent                Silence all output.
        #         --[no-]color                 Enables color output.
        #                                      Default: true
        #     -V, --[no-]version               Prints the ronin-gen version.
        #
        # ## Examples
        #
        #     ronin-gen repository myrepo --git
        #     ronin-gen library ronin-pwn 
        #
        class Gen < Command

          summary "Runs or lists available generators"

          usage '[[options] | GENERATOR [generator-options]]'

          option :version, :type => true,
                           :flag => '-V',
                           :description => 'Prints the ronin-gen version'

          examples [
            "ronin-gen repository myrepo --git",
            "ronin-gen library ronin-pwn"
          ]

          #
          # Starts the `ronin-gen` command.
          #
          # @param [Array<String>] argv
          #   The arguments for the command.
          #
          def start(argv=ARGV)
            if (argv.empty? || argv.first.start_with?('-'))
              return super(argv)
            end

            generator_name  = argv.shift
            generator       = Ronin::Gen.generator(generator_name).new

            case generator
            when Ronin::Gen::FileGenerator, Ronin::Gen::DirGenerator
              opts = Parameters::Options.parser(generator) do |opts|
                opts.banner = "ronin-gen #{generator_name} PATH [options]"
              end

              args = opts.parse(argv)

              if args.empty?
                print_error "Must specify a PATH argument"
                exit -1
              end

              generator.path = args.first
            else
              opts = Parameters::Options.parser(generator) do |opts|
                opts.banner = "ronin-gen #{generator_name} [options]"
              end

              args = opts.parse(argv)
            end

            begin
              generator.generate!
            rescue Parameters::MissingParam => error
              print_error error
              print_error "Please see `ronin-gen #{generator_name} --help`"
              exit -1
            rescue => error
              print_exception error
              exit -1
            end
          end

          #
          # Lists the available generators.
          #
          def execute
            if version?
              puts "ronin-gen #{Ronin::Gen::VERSION}"
              return
            end

            print_array Ronin::Gen.generators, :title => 'Available Generators'
          end

        end
      end
    end
  end
end