require 'erb'

module Bivouac
  module Template
    def createDir( dirname )
      if File.exist?( dirname )
        puts "\tskip #{File.expand_path( dirname )}: already exist"
      else
        puts "\tcreate #{File.expand_path( dirname )}"
        FileUtils::mkdir_p( "#{dirname}" )
      end
    end
    
    def createFile( filename, chmod_x = false, force_create_if_existe = nil, &block )
      create_ok = false
      
      if force_create_if_existe.nil?
        if File.exist?( filename )
          print "\toverwrite #{File.expand_path( filename )}? [Yn] "
          r = $stdin.gets.chomp
          if r == "Y" or r == "y" or r == ""
            puts "\tforce #{File.expand_path( filename )}"
            create_ok = true
          else
            puts "\tskip #{File.expand_path( filename )}: already exist"
            create_ok = false
          end
        else
          puts "\tcreate #{File.expand_path( filename )}"
          create_ok = true
        end
      elsif force_create_if_existe == false 
        if File.exist?( filename )
          puts "\tskip #{File.expand_path( filename )}: already exist"
          create_ok = false
        else
          puts "\tcreate #{File.expand_path( filename )}"
          create_ok = true
        end
      elsif force_create_if_existe == true
        if File.exist?( filename )
          puts "\tforce #{File.expand_path( filename )}"
        else
          puts "\tcreate #{File.expand_path( filename )}"
        end
        create_ok = true
      end
      
      if create_ok == true
        open( "#{filename}", "w" ) { |io| 
          yield( io )
        }
        FileUtils::chmod 0755, filename if chmod_x
      end
    end
    
    def copyTemplate( file, dest, from = File.dirname(__FILE__) )
      if File.exist?( dest + "/" + File.basename( file ) )
        puts "\tskip #{File.expand_path( dest + "/" + File.basename( file ) )}: already exist"
      else
        puts "\tcreate #{File.expand_path( dest ) + "/" + File.basename( file )}"
        src = from + "/template/" + file
        FileUtils::cp( src, dest )
      end
    end
    
    def plugin_template( template_file, b = nil )
      result = if b.nil? 
        ERB.new(File.readlines(template_file).join, nil, '-').result( )
      else
        ERB.new(File.readlines(template_file).join, nil, '-').result( b )
      end
      return( result )
    end
    
    def template( template_name, b = nil, from = File.dirname(__FILE__) )
      template_file = from + "/template/" + template_name + ".rb"
      
      return plugin_template( template_file, b )
    end
  end
end