#!/usr/bin/env ruby

require "bundler/setup"
require "ruby_pager"
require "trollop"
require "ap"


opts = Trollop::options do
  version "line_edit 0.0.1 (c) 2018 Vicente Bosch Campos"
  banner <<-EOS
line_edit is a command tool that allows the creation,edition or deletion of text lines in a Page XML file
Usage:
	generate_htk_language_model [options]
	where [options] are:
  EOS
  opt :mode ,"Three operation modes exist: mk (creates a region), rm (removes a region as per region id provided) , ed (edit a region as per data provided).", :type=> :string, :default => "image"
  opt :input_file, "page input file used as base for the region creation/edition/deletion", :type => :string, :default => "input.xml"
  opt :output_file, "page output file where the updated xml page will be saved", :type => :string, :default => "output.xml"
  opt :region_id, "label id of the region to be added, edited or deleted", :type => :string
  opt :line_id, "label id of the region to be added, edited or deleted", :type => :string
  opt :coords, "coords to be used in the addition of edition of a text region. Format: \"x1,y1 x2,y2 x3,y3...\" (quotation marks required)" , :type => :string
  opt :new_label_id, "new label id of the region that is being edited", :type => :string

end

Trollop::die :mode, "Operation mode was not selected" unless opts[:mode]
Trollop::die :mode, "Operation mode selected must be either mk (make), rm (remove) or ed (edit)" unless opts[:mode]=="mk" or opts[:mode]=="rm" or opts[:mode]=="ed"
Trollop::die :input_file, "Input page file name was not indicated" unless opts[:input_file]
Trollop::die :input_file, "Indicated input page file does not exist which is required" unless File.exist?(opts[:input_file])
Trollop::die :output_file, "Output page file name was not indicated" unless opts[:output_file]
Trollop::die :output_file, "Indicated output page file exists which will cause the command to overwrite it" if File.exist?(opts[:output_file])
Trollop::die :label_id, "Label id of region to be added/edited/deleted was not specified" unless opts[:label_id]
Trollop::die :coords, "Region was selected to be addedd but no coordinates for the contour were provided" if opts[:mode]=="mk" and not opts[:coords]

input_page = RubyPager::Page.load_from_xml(opts[:input_file])

if opts[:mode]=="mk"
  new_region=RubyPager::Text_Region.blank
  new_region.id=opts[:label_id]
  new_region.contour.reload(opts[:coords])
  input_page.push(new_region)
elsif opts[:mode]=="rm"
  if input_page.has_region? opts[:label_id]
    input_page.delete opts[:label_id]
  end
else
  if input_page.has_region? opts[:label_id]
    input_page[opts[:label_id]].contour.reload(opts[:coords]) if opts[:coords]
    if opts[:new_label_id]
      input_page[opts[:label_id]].id = opts[:new_label_id] unless input_page.has_region? opts[:new_label_id]
    end
  end
end

input_page.save(opts[:output_file])