# frozen_string_literal: true

# This class finds files in a repository by name and content
# the result is joined and sorted by file name
module Gitlab
  class FileFinder
    attr_reader :project, :ref

    delegate :repository, to: :project

    def initialize(project, ref)
      @project = project
      @ref = ref
    end

    def find(query, content_match_cutoff: nil)
      query = Gitlab::Search::Query.new(query, encode_binary: true) do
        filter :filename, matcher: ->(filter, blob) do
          ::Gitlab::UntrustedRegexp.new("(?i)#{filter[:regex_value]}$").match?(blob.binary_path)
        end

        filter :path, matcher: ->(filter, blob) do
          ::Gitlab::UntrustedRegexp.new("(?i)#{filter[:regex_value]}").match?(blob.binary_path)
        end

        filter :extension, matcher: ->(filter, blob) do
          ::Gitlab::UntrustedRegexp.new("(?i)\\.#{filter[:regex_value]}$").match?(blob.binary_path)
        end
      end

      content_match_cutoff = nil if query.filters.any?
      files = find_by_path(query.term) + find_by_content(query.term, { limit: content_match_cutoff })

      files = query.filter_results(files) if query.filters.any?

      files
    rescue Gitlab::Git::Repository::NoRepository
      []
    end

    private

    def find_by_content(query, options)
      repository.search_files_by_content(query, ref, options).map do |result|
        Gitlab::Search::FoundBlob.new(content_match: result, project: project, ref: ref, repository: repository)
      end
    end

    def find_by_path(query)
      search_paths(query).map do |path|
        Gitlab::Search::FoundBlob.new(blob_path: path, path: path, project: project, ref: ref, repository: repository)
      end
    end

    # Overridden in Gitlab::WikiFileFinder
    def search_paths(query)
      return [] if query.blank? || ref.blank?

      escaped_query = RE2::Regexp.escape(query)
      query_regexp = Gitlab::EncodingHelper.encode_utf8_no_detect("(?i)#{escaped_query}")
      repository.search_files_by_regexp(query_regexp, ref)
    end
  end
end
