#!/usr/bin/env ruby
require 'gli'
require 'reveal-ck'

class RevealCKExecutable
  extend GLI::App
  extend RevealCK::Misc::RemoveExtension

  program_desc 'A reveal.js construction kit'

  version RevealCK::VERSION

  desc 'Generate reveal.js slides'
  command :generate do |c|
    default_file = FileList['slides.*'].first
    c.desc 'The file containing your slide content'
    c.flag [:f, :file], default_value: default_file

    c.desc 'The directory for generated slides. Default based on slide file.'
    c.flag [:d, :dir]

    c.action do |_, options, _|
      slides_file = options[:file]
      if slides_file.nil?
        puts
        puts 'Problem:'
        puts
        puts '  reveal-ck could not find a slides file, and it cannnot build'
        puts '  your presentation without one.'
        puts
        puts '  It thinks anything that matches "slides.*" is a slides file.'
        puts
        puts '  Some examples are: slides.md, slides.html, slides.haml'
        puts
        msg = 'Create a file matching slides.* to proceed, such as slides.md.'
        exit_now!(msg)
      end
      slides_dir = options[:dir] || remove_extension(options[:file])

      generate_args = {
        user_dir: Dir.pwd,
        gem_dir: RevealCK.path,
        output_dir: slides_dir,
        slides_file: slides_file
      }
      RevealCK::Commands::Generate.new(generate_args).run
    end
  end

  desc 'Start webserver so slides are available via http'
  command :serve, :server do |c|
    default_file = FileList['slides.*'].first
    c.desc 'The file containing your slide content'
    c.flag [:f, :file], default_value: default_file

    c.desc 'The directory to serve up. Default is based on slide file.'
    c.flag [:d, :dir]

    c.desc 'The port to serve on'
    c.flag [:p, :port], default_value: 10_000

    c.desc 'The host to serve on'
    c.flag [:h, :host], default_value: 'localhost'

    c.desc 'Exit after starting + n seconds (for testing only)'
    c.flag ['test-quit-after-starting'], type: Integer

    c.action do |_, options, _|
      slides_dir = options[:dir] || remove_extension(options[:file])
      serve_args = {
        doc_root: slides_dir,
        gem_dir: RevealCK.path,
        output_dir: slides_dir,
        port: options[:port],
        host: options[:host],
        slides_file: options[:file],
        user_dir: Dir.pwd
      }
      if options['test-quit-after-starting']
        Thread.new do
          sleep options['test-quit-after-starting']
          exit
        end
      end
      RevealCK::Commands::Serve.new(serve_args).run
    end
  end
  exit run(ARGV)
end