class SvelteOnRails::Lib::Utils

def self.precompile(last_mtime = nil)
  config = SvelteOnRails::Configuration.instance
  # run build
  cmd = "#{config.rails_root.join('node_modules', '.bin', 'vite')} build --config vite-ssr.config.ts"
  stdout, stderr, status = Open3.capture3(cmd)
  warnings = stderr.to_s.split("\n")
  errors_matcher = Regexp.new('(Could not resolve|failed to resolve)')
  error_lines = warnings.select { |e| e.match(errors_matcher) }
  have_error = error_lines.present? || status.to_s.match(/exit 1/)
  # error handling
  if stderr.present?
    red_background = "\033[97;41m"
    light_blue_background = "\033[30;106m"
    clear_colors = "\033[0m"
    msg = "  +++  #{have_error ? 'ERROR' : 'WARNING'} compiling Svelte components#{have_error ? ' failed' : ''} («#{cmd}»)  +++  "
    puts "#{have_error ? red_background : light_blue_background}#{msg}#{clear_colors}"
    warnings.each do |e|
      if e.match(errors_matcher)
        red_font = "\033[31m"
        puts "#{red_background}  #{clear_colors}#{red_font} #{e}#{clear_colors}"
      else
        puts "#{light_blue_background}  #{clear_colors}#{e}"
      end
    end
    if have_error
      puts "#{red_background}  +++  End of error message  +++  #{clear_colors}"
    else
      puts "#{light_blue_background}  +++  End of compiling warnings  +++  #{clear_colors}"
    end
    puts "#{have_error ? red_background : light_blue_background}  +++  Run «npm run build:ssr» on the console to see the original error message  +++  #{clear_colors}"
    if have_error
      cl_str = if error_lines.present?
                 "#{error_lines.join("\n")}\n\n"
               end
      raise "Svelte components compilation failed\n\n#{cl_str}Full message:\n+++\n#{stderr}+++\n\nYou can run «npm run build:ssr» on the console to see the original error message\n"
    end
  end
  puts stdout
  unless Dir.exist?(config.ssr_dist_folder)
    raise "Could not find dist folder: #{config.ssr_dist_folder}"
  end
  if last_mtime
    mtime_path = config.ssr_dist_folder.join('last_mtime')
    File.write(mtime_path, last_mtime.to_s)
  end
end