import {useMemo, useState} from 'react';
import {browserHistory} from 'react-router';
import styled from '@emotion/styled';
import omit from 'lodash/omit';
import moment from 'moment';

import ProjectAvatar from 'sentry/components/avatar/projectAvatar';
import {Breadcrumbs} from 'sentry/components/breadcrumbs';
import {LinkButton} from 'sentry/components/button';
import {AggregateSpans} from 'sentry/components/events/interfaces/spans/aggregateSpans';
import FloatingFeedbackWidget from 'sentry/components/feedback/widget/floatingFeedbackWidget';
import * as Layout from 'sentry/components/layouts/thirds';
import ExternalLink from 'sentry/components/links/externalLink';
import {DatePageFilter} from 'sentry/components/organizations/datePageFilter';
import {EnvironmentPageFilter} from 'sentry/components/organizations/environmentPageFilter';
import PageFilterBar from 'sentry/components/organizations/pageFilterBar';
import {ProjectPageFilter} from 'sentry/components/organizations/projectPageFilter';
import {TabList, Tabs} from 'sentry/components/tabs';
import {IconChevron, IconClose} from 'sentry/icons';
import {t, tct} from 'sentry/locale';
import ConfigStore from 'sentry/stores/configStore';
import {space} from 'sentry/styles/space';
import {defined} from 'sentry/utils';
import {decodeScalar} from 'sentry/utils/queryString';
import useDismissAlert from 'sentry/utils/useDismissAlert';
import {useLocation} from 'sentry/utils/useLocation';
import useOrganization from 'sentry/utils/useOrganization';
import useProjects from 'sentry/utils/useProjects';
import useRouter from 'sentry/utils/useRouter';
import {normalizeUrl} from 'sentry/utils/withDomainRequired';
import {PageOverviewSidebar} from 'sentry/views/performance/browser/webVitals/components/pageOverviewSidebar';
import {
  PerformanceScoreBreakdownChart,
  SCORE_MIGRATION_TIMESTAMP,
} from 'sentry/views/performance/browser/webVitals/components/performanceScoreBreakdownChart';
import WebVitalMeters from 'sentry/views/performance/browser/webVitals/components/webVitalMeters';
import {PageOverviewWebVitalsDetailPanel} from 'sentry/views/performance/browser/webVitals/pageOverviewWebVitalsDetailPanel';
import {PageSamplePerformanceTable} from 'sentry/views/performance/browser/webVitals/pageSamplePerformanceTable';
import {calculatePerformanceScoreFromTableDataRow} from 'sentry/views/performance/browser/webVitals/utils/queries/rawWebVitalsQueries/calculatePerformanceScore';
import {useProjectRawWebVitalsQuery} from 'sentry/views/performance/browser/webVitals/utils/queries/rawWebVitalsQueries/useProjectRawWebVitalsQuery';
import {calculatePerformanceScoreFromStoredTableDataRow} from 'sentry/views/performance/browser/webVitals/utils/queries/storedScoreQueries/calculatePerformanceScoreFromStored';
import {useProjectWebVitalsScoresQuery} from 'sentry/views/performance/browser/webVitals/utils/queries/storedScoreQueries/useProjectWebVitalsScoresQuery';
import type {WebVitals} from 'sentry/views/performance/browser/webVitals/utils/types';
import {useStoredScoresSetting} from 'sentry/views/performance/browser/webVitals/utils/useStoredScoresSetting';
import {
  AlertContent,
  DismissButton,
  StyledAlert,
} from 'sentry/views/performance/browser/webVitals/webVitalsLandingPage';
import {ModulePageProviders} from 'sentry/views/performance/modulePageProviders';

import {transactionSummaryRouteWithQuery} from '../../transactionSummary/utils';

export enum LandingDisplayField {
  OVERVIEW = 'overview',
  SPANS = 'spans',
}

const LANDING_DISPLAYS = [
  {
    label: t('Overview'),
    field: LandingDisplayField.OVERVIEW,
  },
  {
    label: t('Aggregate Spans'),
    field: LandingDisplayField.SPANS,
  },
];

function getCurrentTabSelection(selectedTab) {
  const tab = decodeScalar(selectedTab);
  if (tab && Object.values(LandingDisplayField).includes(tab as LandingDisplayField)) {
    return tab as LandingDisplayField;
  }
  return LandingDisplayField.OVERVIEW;
}

export default function PageOverview() {
  const organization = useOrganization();
  const location = useLocation();
  const {projects} = useProjects();
  const router = useRouter();
  const shouldUseStoredScores = useStoredScoresSetting();
  const transaction = location.query.transaction
    ? Array.isArray(location.query.transaction)
      ? location.query.transaction[0]
      : location.query.transaction
    : undefined;
  const project = useMemo(
    () => projects.find(p => p.id === String(location.query.project)),
    [projects, location.query.project]
  );

  const tab = getCurrentTabSelection(location.query.tab);

  // TODO: When visiting page overview from a specific webvital detail panel in the landing page,
  // we should automatically default this webvital state to the respective webvital so the detail
  // panel in this page opens automatically.
  const [state, setState] = useState<{webVital: WebVitals | null}>({
    webVital: (location.query.webVital as WebVitals) ?? null,
  });

  const user = ConfigStore.get('user');

  const {dismiss, isDismissed} = useDismissAlert({
    key: `${organization.slug}-${user.id}:performance-score-migration-message-dismissed`,
  });

  const query = decodeScalar(location.query.query);

  const {data: pageData, isLoading} = useProjectRawWebVitalsQuery({transaction});
  const {data: projectScores, isLoading: isProjectScoresLoading} =
    useProjectWebVitalsScoresQuery({transaction, enabled: shouldUseStoredScores});

  if (transaction === undefined) {
    // redirect user to webvitals landing page
    window.location.href = normalizeUrl(
      `/organizations/${organization.slug}/performance/browser/pageloads/`
    );
    return null;
  }

  const transactionSummaryTarget =
    project &&
    !Array.isArray(location.query.project) && // Only render button to transaction summary when one project is selected.
    transaction &&
    transactionSummaryRouteWithQuery({
      orgSlug: organization.slug,
      transaction,
      query: {...location.query},
      projectID: project.id,
    });

  const projectScore =
    (shouldUseStoredScores && isProjectScoresLoading) || isLoading
      ? undefined
      : shouldUseStoredScores
        ? calculatePerformanceScoreFromStoredTableDataRow(projectScores?.data?.[0])
        : calculatePerformanceScoreFromTableDataRow(pageData?.data?.[0]);

  const scoreMigrationTimestampString = moment(SCORE_MIGRATION_TIMESTAMP).format(
    'DD MMMM YYYY'
  );

  return (
    <ModulePageProviders
      title={[t('Performance'), t('Web Vitals')].join(' — ')}
      baseURL="/performance/browser/pageloads"
      features="starfish-browser-webvitals"
    >
      <Tabs
        value={tab}
        onChange={value => {
          browserHistory.push({
            ...location,
            query: {
              ...location.query,
              tab: value,
            },
          });
        }}
      >
        <Layout.Header>
          <Layout.HeaderContent>
            <Breadcrumbs
              crumbs={[
                {
                  label: 'Performance',
                  to: normalizeUrl(`/organizations/${organization.slug}/performance/`),
                  preservePageFilters: true,
                },
                {
                  label: 'Web Vitals',
                  to: normalizeUrl(
                    `/organizations/${organization.slug}/performance/browser/pageloads/`
                  ),
                  preservePageFilters: true,
                },
                ...(transaction ? [{label: 'Page Overview'}] : []),
              ]}
            />
            <Layout.Title>
              {transaction && project && <ProjectAvatar project={project} size={24} />}
              {transaction ?? t('Page Loads')}
            </Layout.Title>
          </Layout.HeaderContent>
          <Layout.HeaderActions>
            {transactionSummaryTarget && (
              <LinkButton to={transactionSummaryTarget} size="sm">
                {t('View Transaction Summary')}
              </LinkButton>
            )}
          </Layout.HeaderActions>
          <TabList hideBorder>
            {LANDING_DISPLAYS.map(({label, field}) => (
              <TabList.Item key={field}>{label}</TabList.Item>
            ))}
          </TabList>
        </Layout.Header>
        {tab === LandingDisplayField.SPANS ? (
          <Layout.Body>
            <Layout.Main fullWidth>
              {defined(transaction) && <AggregateSpans transaction={transaction} />}
            </Layout.Main>
          </Layout.Body>
        ) : (
          <Layout.Body>
            <FloatingFeedbackWidget />
            <Layout.Main>
              <TopMenuContainer>
                {transaction && (
                  <ViewAllPagesButton
                    to={{
                      ...location,
                      pathname: '/performance/browser/pageloads/',
                      query: {...location.query, transaction: undefined},
                    }}
                  >
                    <IconChevron direction="left" /> {t('View All Pages')}
                  </ViewAllPagesButton>
                )}
                <PageFilterBar condensed>
                  <ProjectPageFilter />
                  <EnvironmentPageFilter />
                  <DatePageFilter />
                </PageFilterBar>
              </TopMenuContainer>
              {shouldUseStoredScores && !isDismissed && (
                <StyledAlert type="info" showIcon>
                  <AlertContent>
                    <span>
                      {tct(
                        `We made improvements to how Performance Scores are calculated for your projects. Starting on [scoreMigrationTimestampString], scores are updated to more accurately reflect user experiences. [link:Read more about these improvements].`,
                        {
                          scoreMigrationTimestampString,
                          link: (
                            <ExternalLink href="https://sentry.engineering/blog/how-we-improved-performance-score-accuracy" />
                          ),
                        }
                      )}
                    </span>
                    <DismissButton
                      priority="link"
                      icon={<IconClose />}
                      onClick={dismiss}
                      aria-label={t('Dismiss Alert')}
                      title={t('Dismiss Alert')}
                    />
                  </AlertContent>
                </StyledAlert>
              )}
              <Flex>
                <PerformanceScoreBreakdownChart transaction={transaction} />
              </Flex>
              <WebVitalMetersContainer>
                <WebVitalMeters
                  projectData={pageData}
                  projectScore={projectScore}
                  onClick={webVital => {
                    router.replace({
                      pathname: location.pathname,
                      query: {...location.query, webVital},
                    });
                    setState({...state, webVital});
                  }}
                  transaction={transaction}
                  showTooltip={false}
                />
              </WebVitalMetersContainer>
              <PageSamplePerformanceTableContainer>
                <PageSamplePerformanceTable
                  transaction={transaction}
                  limit={15}
                  search={query}
                />
              </PageSamplePerformanceTableContainer>
            </Layout.Main>
            <Layout.Side>
              <PageOverviewSidebar
                projectScore={projectScore}
                transaction={transaction}
                projectScoreIsLoading={isLoading}
              />
            </Layout.Side>
          </Layout.Body>
        )}
        <PageOverviewWebVitalsDetailPanel
          webVital={state.webVital}
          onClose={() => {
            router.replace({
              pathname: router.location.pathname,
              query: omit(router.location.query, 'webVital'),
            });
            setState({...state, webVital: null});
          }}
        />
      </Tabs>
    </ModulePageProviders>
  );
}

const ViewAllPagesButton = styled(LinkButton)`
  margin-right: ${space(1)};
`;

const TopMenuContainer = styled('div')`
  margin-bottom: ${space(1)};
  display: flex;
`;

const Flex = styled('div')`
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  width: 100%;
  gap: ${space(1)};
`;

const PageSamplePerformanceTableContainer = styled('div')`
  margin-top: ${space(1)};
`;

const WebVitalMetersContainer = styled('div')`
  margin: ${space(2)} 0 ${space(4)} 0;
`;