# frozen_string_literal: true

module Gitlab
  module Ci
    module Parsers
      module Sbom
        class Cyclonedx
          SUPPORTED_SPEC_VERSIONS = %w[1.4].freeze

          def parse!(blob, sbom_report)
            @report = sbom_report
            @data = Gitlab::Json.parse(blob)

            return unless valid?

            parse_report
          rescue JSON::ParserError => e
            report.add_error("Report JSON is invalid: #{e}")
          end

          private

          attr_reader :json_data, :report, :data

          def schema_validator
            @schema_validator ||= Validators::CyclonedxSchemaValidator.new(data)
          end

          def valid?
            valid_schema? && supported_spec_version?
          end

          def supported_spec_version?
            return true if SUPPORTED_SPEC_VERSIONS.include?(data['specVersion'])

            report.add_error(
              "Unsupported CycloneDX spec version. Must be one of: %{versions}" \
              % { versions: SUPPORTED_SPEC_VERSIONS.join(', ') }
            )

            false
          end

          def valid_schema?
            return true if schema_validator.valid?

            schema_validator.errors.each { |error| report.add_error(error) }

            false
          end

          def parse_report
            parse_metadata_properties
            parse_components
          end

          def parse_metadata_properties
            properties = data.dig('metadata', 'properties')
            source = CyclonedxProperties.parse_source(properties)
            report.set_source(source) if source
          end

          def parse_components
            data['components']&.each_with_index do |component_data, index|
              component = ::Gitlab::Ci::Reports::Sbom::Component.new(
                type: component_data['type'],
                name: component_data['name'],
                purl: component_data['purl'],
                version: component_data['version']
              )

              report.add_component(component) if component.ingestible?
            rescue ::Sbom::PackageUrl::InvalidPackageUrl
              report.add_error("/components/#{index}/purl is invalid")
            end
          end
        end
      end
    end
  end
end