#!/usr/bin/env ruby

require 'tms'
require 'optparse'

def option_parser
  @option_parser ||= OptionParser.new do |op|
    op.banner = <<-BANNER
    #{op.program_name}, version #{Tms.version}

    Usege:
      List: #{op.program_name} [options]
      Diff: #{op.program_name} [options] id|nXXX [id|nXXX]
      BANNER

    op.on('-d', '--directory DIRECTORY', 'Use backup directory') do |backups_dir|
      Tms::Backup.backups_dir = backups_dir
    end

    op.on('-f', '--filter DIRECTORY', 'Show diff starting from directory', '  (can be used multiple times)') do |filter_dir|
      Tms::Backup.add_filter_dir(filter_dir)
    end

    op.on('-i', '--[no-]in-progress', 'Show backups in progress',
                                      '  (note: some directories will be',
                                      '   empty in unfinished backups)') do |show_in_progress|
      Tms::Backup.show_in_progress = show_in_progress
    end

    op.on('-l', '--[no-]long', 'Show more info about backup in list') do |show_all_columns|
      Tms::Backup.show_all_columns = show_all_columns
    end

    op.on('--[no-]color', 'Use color', '  (true by default if stdout is a tty)') do |colorize|
      Tms::Backup.colorize = colorize
    end

    op.on('--[no-]progress', 'Show progress when counting folder size', '  (true by default if stderr is a tty)') do |show_progress|
      Tms::Backup.show_progress = show_progress
    end

    op.on('--[no-]decimal', 'Use base 10 size') do |use_decimal|
      Tms::Space.base10 = use_decimal
    end

    op.on_tail('-h', '--help', 'Show this message') do
      puts op.help
      exit
    end

    op.on_tail('--version', 'Show version') do
      puts Tms.version
      exit
    end
  end
end

ids, options = ARGV.partition{ |arg| arg =~ /^[\-n]?\d+$/ }
begin
  option_parser.parse!(options)
rescue OptionParser::ParseError => e
  abort "#{e.to_s}\n#{option_parser.help}"
end
unless options.empty?
  abort "Unknown arguments: #{options.join(' ')}"
end

case ids.length
when 0
  Tms.list
when 1..2
  Tms.diff(*ids)
else
  abort 'Max two arguments'
end