require_relative "svi/ansi"
require_relative "svi/cli"
require_relative "svi/svn_runner"
require_relative "svi/version"
require "svi/svi"

module Svi
  class << self

    def checkout(url)
      checkout_directory = []
      if url =~ %r{/([^/]+)/trunk$}
        checkout_directory << $1
      end
      last_checkout_message = ""
      checked_out_paths = []
      clear_message = lambda do
        if last_checkout_message.size > 0
          clear = ""
          lines = (last_checkout_message.size + C.screen_width - 1) / C.screen_width
          if lines > 1
            clear += Ansi.cursor_up(lines - 1)
          end
          clear += Ansi.cursor_back(999)
          clear += Ansi.erase_cursor_to_eos
          $stdout.write(clear)
          last_checkout_message = ""
        end
      end
      SvnRunner.run_svn("checkout", [url] + checkout_directory, allow_interactive: true) do |line|
        if line =~ /^A.{4}(.*)$/
          path = $1
          checked_out_paths << path
          clear_message[]
          last_checkout_message = "Checking out #{path}..."
          $stdout.write(last_checkout_message)
          $stdout.flush
        elsif line =~ /^\sU\s{3}/
          # Ignore the 'U'pdate line of the checkout directory itself.
        elsif line =~ /^Checked out revision (\d+)/
          revision = $1
          clear_message[]
          n_files = 0
          n_directories = 0
          checked_out_paths.uniq.each do |path|
            if File.directory?(path)
              n_directories += 1
            else
              n_files += 1
            end
          end
          $stdout.puts "Checked out revision #{revision}: #{n_files} file#{n_files == 1 ? '' : 's'}, #{n_directories} director#{n_directories == 1 ? 'y' : 'ies'}"
        else
          clear_message[]
          $stdout.puts line
        end
      end
      0
    end

  end
end