# frozen_string_literal: true

require_relative '../../rubocop'
require_relative '../../rubocop/lsp/logger'
require_relative 'wraps_built_in_lsp_runtime'

module RubyLsp
  module RuboCop
    # A Ruby LSP add-on for RuboCop.
    class Addon < RubyLsp::Addon
      def initializer
        @wraps_built_in_lsp_runtime = nil
      end

      def name
        'RuboCop'
      end

      def activate(global_state, message_queue)
        ::RuboCop::LSP::Logger.log(
          "Activating RuboCop LSP addon #{::RuboCop::Version::STRING}.", prefix: '[RuboCop]'
        )

        ::RuboCop::LSP.enable
        @wraps_built_in_lsp_runtime = WrapsBuiltinLspRuntime.new

        global_state.register_formatter('rubocop', @wraps_built_in_lsp_runtime)

        register_additional_file_watchers(global_state, message_queue)

        ::RuboCop::LSP::Logger.log(
          "Initialized RuboCop LSP addon #{::RuboCop::Version::STRING}.", prefix: '[RuboCop]'
        )
      end

      def deactivate
        @wraps_built_in_lsp_runtime = nil
      end

      # rubocop:disable Layout/LineLength, Metrics/MethodLength
      def register_additional_file_watchers(global_state, message_queue)
        return unless global_state.supports_watching_files

        message_queue << Request.new(
          id: 'rubocop-file-watcher',
          method: 'client/registerCapability',
          params: Interface::RegistrationParams.new(
            registrations: [
              Interface::Registration.new(
                id: 'workspace/didChangeWatchedFilesRuboCop',
                method: 'workspace/didChangeWatchedFiles',
                register_options: Interface::DidChangeWatchedFilesRegistrationOptions.new(
                  watchers: [
                    Interface::FileSystemWatcher.new(
                      glob_pattern: '**/.rubocop{,_todo}.yml',
                      kind: Constant::WatchKind::CREATE | Constant::WatchKind::CHANGE | Constant::WatchKind::DELETE
                    )
                  ]
                )
              )
            ]
          )
        )
      end
      # rubocop:enable Layout/LineLength, Metrics/MethodLength

      def workspace_did_change_watched_files(changes)
        return unless changes.any? { |change| change[:uri].end_with?('.rubocop.yml') }

        @wraps_built_in_lsp_runtime.init!

        ::RuboCop::LSP::Logger(<<~MESSAGE, prefix: '[RuboCop]')
          Re-initialized RuboCop LSP addon #{::RuboCop::Version::STRING} due to .rubocop.yml file change.
        MESSAGE
      end
    end
  end
end