task default: %w(develop)
STORY_DIR=File.join(ENV['USERPROFILE'], 'Documents\\Twine\\Stories')
STORY_TITLE = 'Volleyball'
STORY_FORMAT = 'SugarCube'
STORY_FORMAT_PATH = "story_formats/sugarcube-2.28.2-for-twine-2.1-local/sugarcube-2"
STORY_FORMAT_VERSION = '2.28.2'
FILES = {
  '01_intro' => '01 Intro',
  '02_transform' => '02 Transform',
  '03_custom_girl' => '03 Custom Girl',
  '04_money_game' => '04 Money Games',
  '05_beaches' => '05 Beaches',
}

def files
  FILES.map do |short_name, long_name|
    OpenStruct.new({
      short_name: short_name,
      long_name: long_name,
      source_file: "story/#{short_name}.tw2",
      dest_file: File.join(STORY_DIR, "#{STORY_TITLE} - #{long_name}.html"),
      wrapper_file: "#{short_name}_wrapper.tw2",
    })
  end
end

task develop: %w(bundle_install) do
  sh "bundle exec twee2 build '--format=#{STORY_FORMAT_PATH}' main.tw2 develop.html"
end

task watch: %w(bundle_install) do
  sh 'start watch.html'  # FIXME non-windows
  sh "bundle exec twee2 watch main.tw2 watch.html"
end

task release: %w(bundle_install) do
  sh "bundle exec twee2 build main.tw2 release.html"
end

desc 'export sub files to Twine 2'
task export: %w(bundle_install) do
  files.each do |file|
    IO.write file.wrapper_file, <<~EOF
      ::StoryTitle
      Volleyball - #{file.long_name}

      ::Twee2Settings [twee2]
      @story_start_name = 'Start #{file.long_name}'
      Twee2::build_config.story_format = '#{STORY_FORMAT}'
      Twee2::build_config.story_format_version = '#{STORY_FORMAT_VERSION}'

      ::StoryIncludes
      images.tw2
      stylesheet.tw2
      storyjs.tw2
      #{file.source_file}
    EOF

    sh(
      'bundle', 'exec', 'twee2', 'export',
      "--format=#{STORY_FORMAT}", "--format-version=#{STORY_FORMAT_VERSION}",
      file.wrapper_file, file.dest_file,
    )
  end
  sh(
    'bundle', 'exec', 'twee2', 'export',
    "--format=#{STORY_FORMAT}", "--format-version=#{STORY_FORMAT_VERSION}",
    'main.tw2', STORY_DIR,
  )
end

desc 'import sub files from Twine 2'
task import: %w(bundle_install) do
  files.each do |file|
    sh(
      'bundle', 'exec', 'twee2', 'decompile',
      file.dest_file, file.source_file,
      '--exclude=StoryJS,StoryCSS,StoryTitle',
      '--exclude-from=../stylesheet.tw2,../storyjs.tw2,../stylesheet.tw2,../images.tw2',
    )
  end
end

task :bundle_install do
  sh 'bundle check || bundle install'
end

task :clean do
  # TODO
end

task :lint do
  files.each do |file|
    twee_source = IO.read(file.source_file)
    twee_source.lines.each_with_index do |line, lineno|
      lineno += 1
      line
      .scan(%r{\[\[([^\]]*)\]\]})
      .map { |x| x[0] }
      .each do |link|
        case link.scan('->').length
        when 0
          #link contains no ->, probably not a problem
          text = link
        when 1
          # no problem
          text, dest = link.split('->')
        else
          warn("link contains multiple -> definitely a problem")
          next
        end
        if text.start_with?('\'')
          if !text.end_with?('\'')
            warn "#{file.source_file}:#{lineno} link text (#{text.inspect}) does not end with single quote despite starting with one"
            next
          end
          text = text[1..-2]
          text
          .to_enum(:scan, '\'')
          .map {Regexp.last_match.offset(0)[0]}
          .each do |offset|
            if text[offset - 1] != '\\'
              warn "#{file.source_file}:#{lineno} link text (#{text.inspect}) contains unquoted single quote in body"
            end
          end
        elsif text.start_with?('"')
          if !text.end_with?('"')
            warn "#{file.source_file}:#{lineno} link text (#{text.inspect}) does not end with double quote despite starting with one"
            next
          end
          text = text[1..-2]
          text
          .to_enum(:scan, '"')
          .map {Regexp.last_match.offset(0)[0]}
          .each do |offset|
            if text[offset - 1] != '\\'
              warn "#{file.source_file}:#{lineno} link text (#{text.inspect}) contains unquoted double quote in body"
            end
          end
        elsif text =~ /\A[\[\]'"\\]*\z/
          warn "#{file.source_file}:#{lineno} link text (#{text.inspect}) contains special characters but is not quoted with single or double quotes"
        end
      end
    end
  end
end