require 'debug_helper'
require 'markdown_helper'

namespace :build do

  desc 'Build README.md'
  task :readme do
    # Make output files.
    Dir.chdir('options/depth') do
      command = 'ruby show.rb > show.yaml'
      system(command)
      command = 'markdown_helper include --pristine template.md show.md'
      system(command)
    end
    class_dir_names = nil
    Dir.chdir('classes') do
      class_names = %w/
        Array
        Dir
        Exception
        File
        Hash
        IO
        MatchData
        Method
        OpenStruct
        Range
        Regexp
        Set
        String
        Struct
        Symbol
        Object
        Custom
      /
      class_dir_names = []
      correct_dir_names = {
          :IO => 'io',
          :MatchData => 'match_data',
          :OpenStruct => 'open_struct',
      }
      class_names.each do |class_name|
        if correct_dir_names.include?(class_name.to_sym)
          class_dir_name = correct_dir_names.fetch(class_name.to_sym)
        else
          class_dir_name = class_name.downcase
        end
        class_dir_names.push(class_dir_name)
      end
      class_dir_names.each do |class_dir_name|
        Dir.chdir(class_dir_name) do
          case_dir_names = Dir.glob('*').select {|f| File.directory? f}
          case_dir_names.each do |case_dir_name|
            Dir.chdir(case_dir_name) do
              command = 'ruby show.rb > show.yaml'
              system(command)
              command = 'markdown_helper include --pristine template.md show.md'
              system(command)
            end
          end
        end
      end
    end
    # Make list of links to class sections.
    File.open('class_links.md', 'w') do |file|
      correct_class_names = {
          :io => 'IO',
          :match_data => 'MatchData',
          :open_struct => 'OpenStruct',
      }
      class_dir_names.each do |class_dir_name|
        next if %w/object custom/.include?(class_dir_name)
        if correct_class_names.include?(class_dir_name.to_sym)
          class_name = correct_class_names.fetch(class_dir_name.to_sym)
        else
          class_name = class_dir_name.capitalize
        end
        link_line = "- [#{class_name}](##{class_name.downcase})"
        file.puts(link_line)
      end
    end
    # Make inclusions for class sections.
    File.open('class_inclusions.md', 'w') do |file|
      class_dir_names.each do |class_name|
        inclusion_line = "@[:markdown](classes/#{class_name}/template.md)"
        file.puts(inclusion_line)
      end
    end
    # Make the README markdown.
    command = "markdown_helper include --pristine template.md ../../README.md"
    system(command)
  end
end