module BitbucketServer
  module Representation
    # An inline comment with the following structure that identifies
    # the part of the diff:
    #
    # "commentAnchor": {
    #   "diffType": "EFFECTIVE",
    #   "fileType": "TO",
    #   "fromHash": "c5f4288162e2e6218180779c7f6ac1735bb56eab",
    #   "line": 1,
    #   "lineType": "ADDED",
    #   "orphaned": false,
    #   "path": "CHANGELOG.md",
    #   "toHash": "a4c2164330f2549f67c13f36a93884cf66e976be"
    #  }
    class PullRequestComment < Comment
      def file_type
        comment_anchor['fileType']
      end

      def from_sha
        comment_anchor['fromHash']
      end

      def to_sha
        comment_anchor['toHash']
      end

      def to?
        file_type == 'TO'
      end

      def from?
        file_type == 'FROM'
      end

      def added?
        line_type  == 'ADDED'
      end

      def removed?
        line_type == 'REMOVED'
      end

      def new_pos
        return if removed?
        return unless line_position

        line_position[1]
      end

      def old_pos
        return if added?
        return unless line_position

        line_position[0]
      end

      def file_path
        comment_anchor.fetch('path')
      end

      private

      def line_type
        comment_anchor['lineType']
      end

      def line_position
        @line_position ||=
          diff_hunks.each do |hunk|
            segments = hunk.fetch('segments', [])
            segments.each do |segment|
              lines = segment.fetch('lines', [])
              lines.each do |line|
                if line['commentIds']&.include?(id)
                  return [line['source'], line['destination']]
                end
              end
            end
        end
      end

      def comment_anchor
        raw.fetch('commentAnchor', {})
      end

      def diff
        raw.fetch('diff', {})
      end

      def diff_hunks
        diff.fetch('hunks', [])
      end
    end
  end
end