# frozen_string_literal: true

require_relative "base_linter"

# Load all the other linters so we can filter out their restricted
# CLASSES—they will be responsible for complaining about the use of
# those HTML classes.
Dir[File.join(__dir__, "*.rb")].sort.each do |file|
  require file unless file == __FILE__
end

module ERBLint
  module Linters
    # Counts the number of times a class reserved for ViewComponents is used
    class DisallowComponentCssCounter < BaseLinter
      CLASSES_COVERED_BY_OTHER_LINTERS =
        BaseLinter.subclasses.reduce([]) do |html_classes, klass|
          html_classes.concat(klass.const_get(:CLASSES))
        end

      CLASSES = (
        JSON.parse(
          File.read(
            File.join(__dir__, "..", "..", "..", "..", "static", "classes.json")
          )
        ).reject do |html_class, _ruby_classes|
          CLASSES_COVERED_BY_OTHER_LINTERS.include?(html_class)
        end
      ).freeze

      def run(processed_source)
        @total_offenses = 0
        @offenses_not_corrected = 0

        processed_source
          .parser
          .nodes_with_type(:tag)
          .each do |node|
            tag = BetterHtml::Tree::Tag.from_node(node)

            tag.attributes["class"]&.value&.split(/\s+/)&.each do |class_name|
              if CLASSES.key? class_name
                @total_offenses += 1
                @offenses_not_corrected += 1
                add_offense(
                  processed_source.to_source_range(tag.loc),
                  format_message(class_name)
                )
              end
            end
          end

        counter_correct?(processed_source)

        dump_data(processed_source) if ENV["DUMP_LINT_DATA"] == "1"
      end

      private

      def format_message(class_name)
        "DisallowComponentCssCounter:HTML class \"#{class_name}\" is reserved for Primer ViewComponents. It might disappear or have different styles in the future. You might want to use #{ruby_classes_sentence_string(class_name)} from Primer ViewComponents instead."
      end

      def ruby_classes_sentence_string(class_name)
        CLASSES[class_name].join(" / ")
      end
    end
  end
end