import {useEffect, useMemo} from 'react';
import styled from '@emotion/styled';

import GuideAnchor from 'sentry/components/assistant/guideAnchor';
import * as Layout from 'sentry/components/layouts/thirds';
import LoadingError from 'sentry/components/loadingError';
import LoadingIndicator from 'sentry/components/loadingIndicator';
import NoProjectMessage from 'sentry/components/noProjectMessage';
import {EnvironmentPageFilter} from 'sentry/components/organizations/environmentPageFilter';
import PageFilterBar from 'sentry/components/organizations/pageFilterBar';
import PageFiltersContainer from 'sentry/components/organizations/pageFilters/container';
import {ProjectPageFilter} from 'sentry/components/organizations/projectPageFilter';
import PanelTable from 'sentry/components/panels/panelTable';
// import {ALL_ACCESS_PROJECTS} from 'sentry/constants/pageFilters';
import {t} from 'sentry/locale';
// import ConfigStore from 'sentry/stores/configStore';
import {space} from 'sentry/styles/space';
// import {Project} from 'sentry/types';
import useOrganization from 'sentry/utils/useOrganization';
import usePageFilters from 'sentry/utils/usePageFilters';
// import useProjects from 'sentry/utils/useProjects';
import useRouter from 'sentry/utils/useRouter';

import Header from '../components/header';
import {Threshold} from '../utils/types';
import useFetchThresholdsListData from '../utils/useFetchThresholdsListData';

import {ThresholdGroupRow} from './thresholdGroupRow';

type Props = {};

function ReleaseThresholdList({}: Props) {
  const router = useRouter();
  const organization = useOrganization();
  useEffect(() => {
    const hasV2ReleaseUIEnabled = organization.features.includes('release-ui-v2');
    if (!hasV2ReleaseUIEnabled) {
      router.replace('/releases/');
    }
  }, [router, organization]);
  // const {projects} = useProjects();
  const {selection} = usePageFilters();
  const {
    data: thresholds = [],
    error,
    isLoading,
    isError,
    refetch,
  } = useFetchThresholdsListData({
    selectedProjectIds: selection.projects,
  });

  // const _getAllSelectedProjects = (): Project[] => {
  //   return projects.filter(project =>
  //     selection.projects.some(id => String(id) === project.id || id === -1)
  //   );
  // };

  // const _getAllEnvironments = (): string[] => {
  //   const selectedProjects = selection.projects.map(id => String(id));
  //   const {user} = ConfigStore.getState();
  //   const allEnvSet = new Set(projects.flatMap(project => project.environments));
  //   // NOTE: mostly taken from environmentSelector.tsx
  //   const unSortedEnvs = new Set(
  //     projects.flatMap(project => {
  //       /**
  //        * Include environments from:
  //        * all projects if the user is a superuser
  //        * the requested projects
  //        * all member projects if 'my projects' (empty list) is selected.
  //        * all projects if -1 is the only selected project.
  //        */
  //       if (
  //         (selectedProjects.length === 1 &&
  //           selectedProjects[0] === ALL_ACCESS_PROJECTS &&
  //           project.hasAccess) ||
  //         (selectedProjects.length === 0 && (project.isMember || user.isSuperuser)) ||
  //         selectedProjects.includes(project.id)
  //       ) {
  //         return project.environments;
  //       }

  //       return [];
  //     })
  //   );
  //   const envDiff = new Set([...allEnvSet].filter(x => !unSortedEnvs.has(x)));

  //   return Array.from(unSortedEnvs)
  //     .sort()
  //     .concat([...envDiff].sort());
  // };

  // NOTE: currently no way to filter for 'None' environments
  const filteredThresholds = selection.environments.length
    ? thresholds.filter(
        threshold => selection.environments.indexOf(threshold.environment.name) > -1
      )
    : thresholds;

  const thresholdGroups: {[key: string]: {[key: string]: Threshold[]}} = useMemo(() => {
    const byProj = {};
    filteredThresholds.forEach(threshold => {
      const projId = threshold.project.id;
      if (!byProj[projId]) {
        byProj[projId] = {};
      }
      const env = threshold.environment.name;
      if (!byProj[projId][env]) {
        byProj[projId][env] = [];
      }
      byProj[projId][env].push(threshold);
    });
    return byProj;
  }, [filteredThresholds]);

  if (isError) {
    return <LoadingError onRetry={refetch} message={error.message} />;
  }
  if (isLoading) {
    return <LoadingIndicator />;
  }

  return (
    <PageFiltersContainer>
      <NoProjectMessage organization={organization}>
        <Header router={router} hasV2ReleaseUIEnabled />
        <Layout.Body>
          <Layout.Main fullWidth>
            <ReleaseThresholdsPageFilterBar condensed>
              <GuideAnchor target="release_projects">
                <ProjectPageFilter />
              </GuideAnchor>
              <EnvironmentPageFilter />
            </ReleaseThresholdsPageFilterBar>
            <StyledPanelTable
              isLoading={isLoading}
              isEmpty={filteredThresholds.length === 0 && !isError}
              emptyMessage={t('No thresholds found.')}
              headers={[
                t('Project Name'),
                t('Environment'),
                t('Window'),
                t('Conditions'),
                t('Actions'),
              ]}
            >
              {thresholdGroups &&
                Object.entries(thresholdGroups).map(([projId, byEnv]) => {
                  return Object.entries(byEnv).map(([envName, thresholdGroup]) => (
                    <ThresholdGroupRow
                      key={`${projId}-${envName}`}
                      thresholds={thresholdGroup}
                    />
                  ));
                })}
            </StyledPanelTable>
          </Layout.Main>
        </Layout.Body>
      </NoProjectMessage>
    </PageFiltersContainer>
  );
}

export default ReleaseThresholdList;

const StyledPanelTable = styled(PanelTable)`
  @media (min-width: ${p => p.theme.breakpoints.small}) {
    overflow: initial;
  }

  grid-template-columns:
    minmax(150px, 1fr) minmax(150px, 1fr) minmax(150px, 1fr) minmax(250px, 4fr)
    auto;
  white-space: nowrap;
  font-size: ${p => p.theme.fontSizeMedium};
`;

const ReleaseThresholdsPageFilterBar = styled(PageFilterBar)`
  margin-bottom: ${space(2)};
`;