# Copyright © Magento, Inc. All rights reserved.
# See COPYING.txt for license details.

# frozen_string_literal: true

namespace :test do
  # Run html-proofer to check for broken links
  desc 'Build site, check for broken links, write report to a file'
  task links: %w[build links_no_build]

  desc 'Check the existing _site for broken EXTERNAL links'
  task :external_links do
    puts 'Testing external links'
    system 'bin/htmlproofer _site/ --external_only'
  end

  desc 'Check the existing _site for broken INTERNAL links'
  task :html do
    # puts 'Checking HTML ...'.magenta

    # LinkChecker.check_site
    puts 'Link checking has been disabled since the project is no longer supported'.magenta
  end

  desc 'Check the existing _site for broken links and report to a separate file'
  task :links_no_build do
    # Write console output (stderr only) to a file.
    # Use this if you need to also capture stdout: https://stackoverflow.com/a/2480439
    report = LinkChecker.md_report_path
    $stderr.reopen(report, 'w+')

    Rake::Task['test:html'].invoke

    # We're expecting link validation errors, but unless we rescue from
    # StandardError, rake will abort and won't run the convert task (https://stackoverflow.com/a/10048406).
    # Wrapping task in a begin-rescue block prevent rake from aborting.
    # Seems to prevent printing an error count though.
  rescue StandardError => e
    # Show how many lines contains the Markdown report
    puts e.to_s.red
    puts "To see the report, open the #{report} file.".red
  end

  desc 'Report about broken links in HTML'
  task report: %w[links] do
    puts 'Converting the link check report to HTML...'.magenta
    Converter.to_html
  end

  desc 'Test Markdown style with mdl'
  task :md do
    # puts 'Testing Markdown style with mdl ...'.magenta
    # print 'List the rules: $ '.magenta
    # sh 'bin/mdl -l --style=_checks/styles/style-rules-prod'
    # puts 'Linting ...'.magenta
    # output =
    #   `bin/mdl \
    #   --style=_checks/styles/style-rules-prod \
    #   --ignore-front-matter \
    #   --git-recurse \
    #   -- .`
    # puts output.yellow
    # abort 'Fix the reported issues'.red unless output.empty?
    # puts 'No issues found'.green
    puts 'Markdown testing has been disabled since the project is no longer supported'.magenta
  end

  desc 'Find unused images. To exclude by regex pattern, use the "exclude_img" argument. Example of excluding a "layout" directory: "rake test:unused_includes exclude_img=/layout/"'
  task :unused_images do
    puts 'Running a task for finding unused images (png,svg,jpeg,jpg,ico)'.magenta
    images = FileList['src/**/*.{png,svg,jpeg,jpg,ico}']

    puts "The project contains a total of #{images.size} images."

    exclude = ENV['exclude_img']
    images.exclude(/#{exclude}/) if exclude

    puts 'Checking for unlinked images...'
    Dir['src/**/*.{md,html,js,css}'].each do |file|
      # Exclude symmlinks
      next if File.symlink? file

      images.delete_if { |image| File.read(file).include?(File.basename(image)) }
    end

    if images.empty?
      puts 'No unlinked images'.green
    else
      images.each do |image|
        puts "No links for #{image}".yellow
      end
      puts "Found #{images.size} dangling images".red
    end
  end

  desc 'Find unused includes. To exclude by regex pattern, use the "exclude_incl" argument. Example of excluding a "layout" directory: "rake test:unused_includes exclude_incl=/layout/"'
  task :unused_includes do
    puts 'Running a task to find unused _includes'.magenta
    includes = FileList['src/_includes/**/*']

    puts "The project contains a total of #{includes.size} includes"

    exclude = ENV['exclude_incl']
    includes.exclude(/#{exclude}/) if exclude

    Dir['src/**/*.{md,html}'].each do |file|
      next if File.symlink? file

      includes.delete_if { |include| File.read(file).include?(File.basename(include)) }
    end

    if includes.empty?
      puts 'No unlinked includes'.green
    else
      puts 'The following includes are not linked:'
      includes.each do |include|
        puts "No links for #{include}".yellow
      end
      puts "Found #{includes.size} unlinked includes".red
      puts 'Be careful removing include files. Some include files, such as those in the layout/** directory, may not be linked in the project, but may be used implicitly by the doc theme.'.bold
    end
  end
end