# frozen_string_literal: true

module KnapsackPro
  module Runners
    module Queue
      class MinitestRunner < BaseRunner
        def self.run(args)
          require 'minitest'

          # Avoid installing `at_exit` since we are calling `Minitest.run` ourselves.
          # Without this, Minitest would run again (autorun) after `Minitest.run`.
          ::Minitest.class_variable_set('@@installed_at_exit', true)

          ENV['KNAPSACK_PRO_TEST_SUITE_TOKEN'] = KnapsackPro::Config::Env.test_suite_token_minitest
          ENV['KNAPSACK_PRO_QUEUE_MODE_ENABLED'] = 'true'
          ENV['KNAPSACK_PRO_QUEUE_ID'] = KnapsackPro::Config::EnvGenerator.set_queue_id

          adapter_class = KnapsackPro::Adapters::MinitestAdapter
          KnapsackPro::Config::Env.set_test_runner_adapter(adapter_class)
          runner = new(adapter_class)

          # Add test_dir to load path to make work:
          #   require 'test_helper'
          # in test files.
          $LOAD_PATH.unshift(runner.test_dir)

          cli_args = (args || '').split

          accumulator = {
            status: :next,
            runner: runner,
            can_initialize_queue: true,
            args: cli_args,
            exitstatus: 0,
            node_test_file_paths: [],
          }
          while accumulator[:status] == :next
            handle_signal!
            accumulator = run_tests(accumulator)
          end

          Kernel.exit(accumulator[:exitstatus])
        rescue KnapsackPro::QueueAllocator::FallbackModeError
          exit_code = KnapsackPro::Config::Env.fallback_mode_error_exit_code
          Kernel.exit(exit_code)
        end

        def self.run_tests(accumulator)
          runner = accumulator.fetch(:runner)
          can_initialize_queue = accumulator.fetch(:can_initialize_queue)
          args = accumulator.fetch(:args)
          exitstatus = accumulator.fetch(:exitstatus)
          node_test_file_paths = accumulator.fetch(:node_test_file_paths)

          test_file_paths = runner.test_file_paths(
            can_initialize_queue: can_initialize_queue,
            executed_test_files: node_test_file_paths
          )

          if test_file_paths.empty?
            unless node_test_file_paths.empty?
              KnapsackPro::Adapters::MinitestAdapter.verify_bind_method_called
            end

            KnapsackPro::Hooks::Queue.call_after_queue

            KnapsackPro::Report.save_node_queue_to_api

            return {
              status: :completed,
              exitstatus: exitstatus,
            }
          else
            subset_queue_id = KnapsackPro::Config::EnvGenerator.set_subset_queue_id
            ENV['KNAPSACK_PRO_SUBSET_QUEUE_ID'] = subset_queue_id

            KnapsackPro.tracker.reset!
            KnapsackPro.tracker.set_prerun_tests(test_file_paths)

            KnapsackPro::Hooks::Queue.call_before_subset_queue

            node_test_file_paths += test_file_paths

            result = minitest_run(runner, test_file_paths, args)
            exitstatus = 1 unless result

            KnapsackPro::Hooks::Queue.call_after_subset_queue

            KnapsackPro::Report.save_subset_queue_to_file

            return {
              status: :next,
              runner: runner,
              can_initialize_queue: false,
              args: args,
              exitstatus: exitstatus,
              node_test_file_paths: node_test_file_paths,
            }
          end
        end

        private

        def self.minitest_run(runner, test_file_paths, args)
          test_file_paths.each do |test_file_path|
            relative_test_file_path = "./#{test_file_path}"

            if File.exist?(relative_test_file_path)
              require relative_test_file_path
            else
              KnapsackPro.logger.warn("Skip loading the #{relative_test_file_path} test file path because it does not exist on the disk. Most likely, the test file path should not be loaded. The test file path could have been recorded during the previous CI build when the knapsack_pro gem could not attribute the execution time of a test to a correct test file path. For instance, you have shared examples in your test suite, and the knapsack_pro gem could not correctly determine for which test file path they were executed. In such a case, the test file path should not be loaded because the actual test cases will be executed by loading a correct test file path. You can ignore this warning.")
            end
          end

          # duplicate args because Minitest modifies args
          result = ::Minitest.run(args.dup)

          ::Minitest::Runnable.reset

          result
        end
      end
    end
  end
end
