import {Fragment} from 'react';
import styled from '@emotion/styled';
import type {Location, LocationDescriptor} from 'history';

import GuideAnchor from 'sentry/components/assistant/guideAnchor';
import {SectionHeading} from 'sentry/components/charts/styles';
import Link from 'sentry/components/links/link';
import Placeholder from 'sentry/components/placeholder';
import QuestionTooltip from 'sentry/components/questionTooltip';
import UserMisery from 'sentry/components/userMisery';
import {IconOpen} from 'sentry/icons';
import {t} from 'sentry/locale';
import type {Organization} from 'sentry/types/organization';
import type EventView from 'sentry/utils/discover/eventView';
import type {QueryError} from 'sentry/utils/discover/genericDiscoverQuery';
import {WebVital} from 'sentry/utils/fields';
import {useMetricsCardinalityContext} from 'sentry/utils/performance/contexts/metricsCardinality';
import {useMEPSettingContext} from 'sentry/utils/performance/contexts/metricsEnhancedSetting';
import {decodeScalar} from 'sentry/utils/queryString';
import {useModuleURL} from 'sentry/views/insights/common/utils/useModuleURL';
import {ModuleName} from 'sentry/views/insights/types';
import {getTermHelp, PerformanceTerm} from 'sentry/views/performance/data';
import {getTransactionMEPParamsIfApplicable} from 'sentry/views/performance/transactionSummary/transactionOverview/utils';
import {vitalsRouteWithQuery} from 'sentry/views/performance/transactionSummary/transactionVitals/utils';
import {SidebarSpacer} from 'sentry/views/performance/transactionSummary/utils';
import VitalInfo from 'sentry/views/performance/vitalDetail/vitalInfo';

type Props = {
  error: QueryError | null;
  eventView: EventView;
  hasWebVitals: boolean;
  isLoading: boolean;
  location: Location;
  organization: Organization;
  totals: Record<string, number> | null;
  transactionName: string;
};

function UserStats({
  isLoading,
  hasWebVitals,
  error,
  totals,
  location,
  organization,
  transactionName,
  eventView,
}: Props) {
  const hasTransactionSummaryCleanupFlag = organization.features.includes(
    'performance-transaction-summary-cleanup'
  );
  const webVitalsUrl = useModuleURL(ModuleName.VITAL, false, 'frontend');

  const hasWebVitalsFlag = organization.features.includes('insights-initial-modules');
  const hasDomainViewFlag = organization.features.includes('insights-domain-view');

  let userMisery = error !== null ? <div>{'\u2014'}</div> : <Placeholder height="34px" />;

  if (!isLoading && error === null && totals) {
    const threshold: number | undefined = totals.project_threshold_config
      ? totals.project_threshold_config[1]
      : undefined;
    const miserableUsers: number | undefined = totals['count_miserable_user()'];
    const userMiseryScore: number = totals['user_misery()'] || 0;
    const totalUsers = totals['count_unique_user()'];
    userMisery = (
      <UserMisery
        bars={40}
        barHeight={30}
        userMisery={userMiseryScore}
        miseryLimit={threshold}
        totalUsers={totalUsers}
        miserableUsers={miserableUsers}
      />
    );
  }

  const orgSlug = organization.slug;

  let webVitalsTarget: LocationDescriptor = vitalsRouteWithQuery({
    orgSlug,
    transaction: transactionName,
    projectID: decodeScalar(location.query.project),
    query: location.query,
  });

  if (hasWebVitalsFlag && hasDomainViewFlag) {
    webVitalsTarget = {
      pathname: `${webVitalsUrl}/overview/`,
      query: {
        transaction: transactionName,
      },
    };
  }

  const showLink = !hasDomainViewFlag || (hasDomainViewFlag && hasWebVitalsFlag);

  const mepSetting = useMEPSettingContext();
  const mepCardinalityContext = useMetricsCardinalityContext();
  const queryExtras = getTransactionMEPParamsIfApplicable(
    mepSetting,
    mepCardinalityContext,
    organization
  );

  return (
    <Fragment>
      {hasWebVitals && (
        <Fragment>
          <VitalsHeading>
            <SectionHeading>
              {t('Web Vitals')}
              <QuestionTooltip
                position="top"
                title={t(
                  'Web Vitals with p75 better than the "poor" threshold, as defined by Google Web Vitals.'
                )}
                size="sm"
              />
            </SectionHeading>
            {showLink && (
              <Link to={webVitalsTarget}>
                <IconOpen />
              </Link>
            )}
          </VitalsHeading>
          <VitalInfo
            location={location}
            vital={[WebVital.FCP, WebVital.LCP, WebVital.FID, WebVital.CLS]}
            orgSlug={orgSlug}
            environment={eventView.environment}
            start={eventView.start}
            end={eventView.end}
            statsPeriod={eventView.statsPeriod}
            project={eventView.project}
            hideVitalThresholds
            hideDurationDetail
            queryExtras={queryExtras}
          />
          <SidebarSpacer />
        </Fragment>
      )}
      {!hasTransactionSummaryCleanupFlag && (
        <Fragment>
          <GuideAnchor target="user_misery" position="left">
            <SectionHeading>
              {t('User Misery')}
              <QuestionTooltip
                position="top"
                title={getTermHelp(organization, PerformanceTerm.USER_MISERY)}
                size="sm"
              />
            </SectionHeading>
          </GuideAnchor>
          {userMisery}
        </Fragment>
      )}

      <SidebarSpacer />
    </Fragment>
  );
}

const VitalsHeading = styled('div')`
  display: flex;
  justify-content: space-between;
  align-items: center;
`;

export default UserStats;