require 'fileutils'
require 'maven/tools/rails_project'

module Maven
  module Ruby
    class PomMagic

      def initialize(pom = '.pom.xml')
        @pom = pom
      end

      def new_rails_project
        ::Maven::Tools::RailsProject.new
      end

      def pom_xml(dir = '.')
        File.join(dir, @pom)
      end

      def generate_pom(dir = '.', *args)
        pom = nil
        FileUtils.cd(dir) do
          if index = (args.index("-f") || args.index("--file"))
            filename = args[index + 1]
            if filename =~ /.gemspec$/
              proj = ::Maven::Tools::GemProject.new
              proj.load_gemspec(filename)
            elsif filename =~ /Gemfile/
              proj = ::Maven::Tools::GemProject.new
              proj.load_gemfile(filename)
            end
          else
            gemfiles = Dir[File.join('.', "*Gemfile")]
            gemfiles.delete_if {|g| g =~ /.pom/}
            if gemfiles.size > 0
              proj =
                if File.exists? File.join( 'config', 'application.rb' )
                  new_rails_project
                else
                  ::Maven::Tools::GemProject.new
                end
              filename = gemfiles[0]
              proj.load_gemfile(filename)
            else
              p File.join(dir, "*.gemspec")
              gemspecs = Dir[File.join('.', "*.gemspec")]
              gemspecs.delete_if {|g| g =~ /.pom/}
              if gemspecs.size > 0
                proj = ::Maven::Tools::GemProject.new
                filename = File.basename(gemspecs[0])
p filename
p File.expand_path '.'
p dir
                proj.load_gemspec(filename)
              end
            end
          end
          if proj
            proj.load_jarfile(File.join(File.dirname(filename), 'Jarfile'))
            proj.load_gemfile(File.join(File.dirname(filename), 'Mavenfile'))
            proj.add_defaults
            pom = pom_xml(dir) 
            File.open(pom, 'w') do |f|
              f.puts proj.to_xml
            end
          end
        end
        pom
      end

      def dump_pom(dir = '.', force = false, file = 'pom.xml')
        if force || !File.exists?(file)
          FileUtils.cp(generate_pom(dir), file)
        end
      end
    end
  end
end