# frozen_string_literal: true

module Analytics
  class PathNormalizer
    UUID_RE = /\A[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\z/i
    NUMERIC_RE = /\A\d{6,}\z/
    TOKENISH_RE = /\A[A-Za-z0-9_\-]{22,}\z/

    EXCLUDED_PREFIXES = %w[/admin /regia /analytics /cable /api /webhooks /internal].freeze

    class << self
      def normalize(raw_path)
        path = raw_path.to_s.split("?", 2).first.to_s
        path = "/" if path.blank?
        path = "/#{path}" unless path.start_with?("/")
        path = path.gsub(%r{/{2,}}, "/").chomp("/")
        path = "/" if path.blank?

        parts = path.split("/").map do |segment|
          next segment if segment.blank?
          next ":id" if UUID_RE.match?(segment)
          next ":id" if NUMERIC_RE.match?(segment)
          next ":token" if TOKENISH_RE.match?(segment) && segment.match?(/[A-Z]/)

          segment
        end
        normalized = parts.join("/")
        normalized = "/" if normalized.blank?
        normalized
      end

      def excluded?(raw_or_normalized)
        path = normalize(raw_or_normalized)
        return true if EXCLUDED_PREFIXES.any? { |p| path == p || path.start_with?("#{p}/") }
        return true if path.match?(%r{\A/live/[^/]+})
        return true if path.match?(%r{\A/replay/[^/]+})

        false
      end
    end
  end
end