# frozen_string_literal: true

module VulnerabilityFindingHelpers
  extend ActiveSupport::Concern

  # Manually resolvable report types cannot be considered fixed once removed from the
  # target branch due to requiring active triage, such as rotation of an exposed token.
  REPORT_TYPES_REQUIRING_MANUAL_RESOLUTION = %w[secret_detection].freeze

  def requires_manual_resolution?
    REPORT_TYPES_REQUIRING_MANUAL_RESOLUTION.include?(report_type)
  end

  def matches_signatures(other_signatures, other_uuid)
    other_signature_types = other_signatures.index_by(&:algorithm_type)

    # highest first
    match_result = nil
    signatures.sort_by(&:priority).reverse_each do |signature|
      matching_other_signature = other_signature_types[signature.algorithm_type]
      next if matching_other_signature.nil?

      match_result = matching_other_signature == signature
      break
    end

    if match_result.nil?
      [uuid, *signature_uuids].include?(other_uuid)
    else
      match_result
    end
  end

  def signature_uuids
    signatures.map do |signature|
      hex_sha = signature.signature_hex
      ::Security::VulnerabilityUUID.generate(
        report_type: report_type,
        location_fingerprint: hex_sha,
        primary_identifier_fingerprint: primary_identifier&.fingerprint,
        project_id: project_id
      )
    end
  end

  def build_vulnerability_finding(security_finding)
    report_finding = report_finding_for(security_finding)
    return Vulnerabilities::Finding.new unless report_finding

    finding_data = report_finding.to_hash.except(:compare_key, :identifiers, :location, :scanner, :links, :signatures,
                                                 :flags, :evidence)
    identifiers = report_finding.identifiers.uniq(&:fingerprint).map do |identifier|
      Vulnerabilities::Identifier.new(identifier.to_hash.merge({ project: project }))
    end
    signatures = report_finding.signatures.map do |signature|
      Vulnerabilities::FindingSignature.new(signature.to_hash)
    end
    evidence = Vulnerabilities::Finding::Evidence.new(data: report_finding.evidence.data) if report_finding.evidence

    Vulnerabilities::Finding.new(finding_data).tap do |finding|
      finding.location_fingerprint = report_finding.location.fingerprint
      finding.vulnerability = vulnerability_for(security_finding.uuid)
      finding.project = project
      finding.sha = pipeline.sha
      finding.scanner = security_finding.scanner
      finding.finding_evidence = evidence

      if calculate_false_positive?
        finding.vulnerability_flags = report_finding.flags.map do |flag|
          Vulnerabilities::Flag.new(flag)
        end
      end

      finding.identifiers = identifiers
      finding.primary_identifier = identifiers.first
      finding.signatures = signatures
    end
  end

  def calculate_false_positive?
    project.licensed_feature_available?(:sast_fp_reduction)
  end
end