# frozen_string_literal: true

module GitlabQuality
  module TestTooling
    module Report
      module Concerns
        module IssueReports
          JOB_URL_REGEX                = %r{(?<job_url>https://(?<host>[\w.]+)/(?<project_path>[\w\-./]+)/-/jobs/\d+)}
          FAILED_JOB_DESCRIPTION_REGEX = /First happened in #{JOB_URL_REGEX}\./m
          REPORT_ITEM_REGEX            = /^1\. \d{4}-\d{2}-\d{2}: #{JOB_URL_REGEX} \((?<pipeline_url>.+)\)$/

          def initial_reports_section(test)
            <<~REPORTS
            ### Reports (1)

            #{report_list_item(test)}
            REPORTS
          end

          def add_report_to_issue_description(issue, test)
            issue_description = issue.description

            # We include the number of reports in the header, for visibility.
            new_issue_description =
              if issue_description.include?('### Reports')
                # We count the number of existing reports.
                reports_count = issue_description
                  .scan(REPORT_ITEM_REGEX)
                  .size.to_i + 1
                issue_description.sub(/^### Reports.*$/, "### Reports (#{reports_count})")
              else # For issue with the legacy format, we add the Reports section
                update_legacy_issue_description(issue_description)
              end

            [new_issue_description, report_list_item(test)].join("\n")
          end

          def failed_issue_job_url(issue)
            job_urls_from_description(issue.description, REPORT_ITEM_REGEX).last ||
              # Legacy format
              job_urls_from_description(issue.description, FAILED_JOB_DESCRIPTION_REGEX).last
          end

          def failed_issue_job_urls(issue)
            job_urls_from_description(issue.description, REPORT_ITEM_REGEX) +
              # Legacy format
              job_urls_from_description(issue.description, FAILED_JOB_DESCRIPTION_REGEX)
          end

          private

          def report_list_item(test)
            "1. #{Time.new.utc.strftime('%F')}: #{test.ci_job_url} (#{ENV.fetch('CI_PIPELINE_URL', 'pipeline url is missing')})"
          end

          def job_urls_from_description(issue_description, regex)
            issue_description.lines.filter_map do |line|
              match = line.match(regex)
              match[:job_url] if match
            end
          end

          def update_legacy_issue_description(issue_description)
            test_captures = issue_description.scan(JOB_URL_REGEX)
            reports_count = test_captures.size.to_i + 1

            updated_description = "#{issue_description}\n\n### Reports (#{reports_count})\n"
            updated_description = [updated_description, *test_captures_to_report_items(test_captures)].join("\n") unless test_captures.empty?
            updated_description
          end

          def test_captures_to_report_items(test_captures)
            test_captures.map do |ci_job_url, _, _|
              report_list_item(GitlabQuality::TestTooling::TestResult::JsonTestResult.new(
                'ci_job_url' => ci_job_url
              ))
            end
          end
        end
      end
    end
  end
end