# -*- coding: utf-8 -*-

module DirCat
#
# Build a catalogue starting from a directory
#
  class CommandBuild < OptParseCommand::CliCommand

    def self.command
      "build"
    end

    def self.description
      "Build a catalogue starting from a directory"
    end

    def self.usage
      "Usage: dircat build [options]"
    end

    def defaults(options)
      options.force = false
    end

    def option_parser(options)
      parser = super(options)
      parser.on("-f", "--force", "force write on existent file") do |v|
        options.force = true
      end

      parser.on("-o [FILE]", "--output [FILE]", String) do |v|
        if options.output
          puts "only one file of output can be used"
          options.exit = true
        end
        options.output = v
      end

      parser
    end

    def exec(main, options, rest)
      if rest.length < 1
        $stderr.puts "directory (from which build catalog) is missing"
        $stderr.puts "-h to print help"
        return false
      end

      dirname  = rest[0]
      dirname  = File.expand_path(dirname)
      cat_opts = {}

      if not FileTest.directory?(dirname)
        $stderr.puts "'#{dirname}' not exists or is not a directory"
        return 0
      end

      #
      # option verbose
      #

      if options.verbose
        cat_opts[:verbose_level] = 1
      end

      #
      # option: output, force
      #
      output = $stdout
      if options.output
        filename = options.output
      else
        filename = "cat_" + File.basename(dirname) + "_" + Date.today.strftime("%Y%m%d") + ".yaml"
      end
      if File.exist?(filename) and not options.force
        $stderr.puts "catalog '#{filename}' exists use --force or -f to overwrite"
        return 0
      end

      output     = File.open(filename, "w")
      start_time = Time.now
      s          = Cat.from_dir(dirname)
      end_time   = Time.now
      s.save_to(output)

      if output != $stdout
        output.close
      end
      $stderr.puts s.report
      $stderr.puts "elapsed: #{end_time - start_time}"
      $stderr.puts "written to #{filename}" if output != $stdout

      true
    end

  end
end