# frozen_string_literal: true

module Swagcov
  class Coverage
    def initialize dotfile: ::Swagcov::Dotfile.new, routes: ::Swagcov.project_routes
      @dotfile = dotfile
      @openapi_files = ::Swagcov::OpenapiFiles.new(filepaths: @dotfile.docs_config)
      @routes = routes
      @rails_version = ::Rails::VERSION::STRING
      @data = {
        covered: [],
        ignored: [],
        uncovered: [],
        total_count: 0,
        covered_count: 0,
        ignored_count: 0,
        uncovered_count: 0
      }
    end

    def collect
      @routes.each do |route|
        path = route_path(route)
        verb = route_verb(route)

        next if default_skipped_route?(route, path)

        if dotfile.ignore_path?(path, verb: verb)
          update_data(:ignored, verb, path, "ignored")
          next
        end

        next if dotfile.only_path_mismatch?(path)

        @data[:total_count] += 1

        if (response_keys = openapi_files.find_response_keys(path: path, route_verb: verb))
          update_data(:covered, verb, path, response_keys.join("  "))
        else
          update_data(:uncovered, verb, path, "none")
        end
      end

      @data
    end

    private

    attr_reader :dotfile, :openapi_files, :rails_version

    def route_path route
      route.path.spec.to_s.chomp("(.:format)")
    end

    def route_verb route
      rails_version > "5" ? route.verb : route.verb.inspect.gsub(%r{[$^/]}, "")
    end

    def default_skipped_route? route, path
      third_party_route?(route, path) || non_api_route?(route, path)
    end

    def third_party_route? route, path
      # https://github.com/rails/rails/blob/48f3c3e201b57a4832314b2c957a3b303e89bfea/actionpack/lib/action_dispatch/routing/inspector.rb#L105-L107
      # Skips route paths like ["/rails/info/properties", "/rails/info", "/rails/mailers"]
      internal_rails_route?(route) ||

        # Skips routes like "/sidekiq"
        route.verb.blank? ||

        # Exclude routes that are part of the rails frameworks that you would not write documentation for
        path.include?("/active_storage/") ||
        path.include?("/action_mailbox/") ||
        turbo_rails_route?(route, path)
    end

    def internal_rails_route? route
      if rails_version > "5"
        route.internal
      else
        ::ActionDispatch::Routing::RouteWrapper.new(route).internal?
      end
    end

    def turbo_rails_route? route, path
      # TODO: add route.source_location.include?("turbo-rails") - working on local machine but not in test env
      path.include?("_historical_location") && route.name.include?("turbo_")
    end

    def non_api_route? route, path
      # By default/convention these are non api routes generated by rails
      %w[new edit].include?(route.defaults[:action]) && (path.include?("/new") || path.include?("/edit"))
    end

    def update_data key, verb, path, status
      @data[:"#{key}_count"] += 1
      @data[key] << { verb: verb, path: path, status: status }
    end
  end
end