import {useRef} from 'react';
import styled from '@emotion/styled';

import {
  deleteMonitorEnvironment,
  setEnvironmentIsMuted,
  updateMonitor,
} from 'sentry/actionCreators/monitors';
import Panel from 'sentry/components/panels/panel';
import {Sticky} from 'sentry/components/sticky';
import {space} from 'sentry/styles/space';
import {setApiQueryData, useApiQuery, useQueryClient} from 'sentry/utils/queryClient';
import useApi from 'sentry/utils/useApi';
import {useDimensions} from 'sentry/utils/useDimensions';
import useOrganization from 'sentry/utils/useOrganization';
import useRouter from 'sentry/utils/useRouter';
import {
  GridLineOverlay,
  GridLineTimeLabels,
} from 'sentry/views/monitors/components/overviewTimeline/gridLines';
import {SortSelector} from 'sentry/views/monitors/components/overviewTimeline/sortSelector';
import {makeMonitorListQueryKey} from 'sentry/views/monitors/utils';

import type {Monitor} from '../../types';

import {ResolutionSelector} from './resolutionSelector';
import {TimelineTableRow} from './timelineTableRow';
import type {MonitorBucketData, TimeWindow} from './types';
import {getConfigFromTimeRange, getStartFromTimeWindow} from './utils';

interface Props {
  monitorList: Monitor[];
}

export function OverviewTimeline({monitorList}: Props) {
  const organization = useOrganization();
  const api = useApi();
  const queryClient = useQueryClient();
  const router = useRouter();
  const location = router.location;

  const timeWindow: TimeWindow = location.query?.timeWindow ?? '24h';
  const nowRef = useRef(new Date());
  const start = getStartFromTimeWindow(nowRef.current, timeWindow);
  const elementRef = useRef<HTMLDivElement>(null);
  const {width: timelineWidth} = useDimensions<HTMLDivElement>({elementRef});

  const timeWindowConfig = getConfigFromTimeRange(start, nowRef.current, timelineWidth);
  const rollup = Math.floor((timeWindowConfig.elapsedMinutes * 60) / timelineWidth);
  const monitorStatsQueryKey = `/organizations/${organization.slug}/monitors-stats/`;
  const {data: monitorStats, isLoading} = useApiQuery<Record<string, MonitorBucketData>>(
    [
      monitorStatsQueryKey,
      {
        query: {
          until: Math.floor(nowRef.current.getTime() / 1000),
          since: Math.floor(start.getTime() / 1000),
          monitor: monitorList.map(m => m.slug),
          resolution: `${rollup}s`,
          ...location.query,
        },
      },
    ],
    {
      staleTime: 0,
      enabled: timelineWidth > 0,
    }
  );

  const handleDeleteEnvironment = async (monitor: Monitor, env: string) => {
    const success = await deleteMonitorEnvironment(api, organization.slug, monitor, env);
    if (!success) {
      return;
    }

    const queryKey = makeMonitorListQueryKey(organization, location.query);
    setApiQueryData(queryClient, queryKey, (oldMonitorList: Monitor[]) => {
      const oldMonitorIdx = oldMonitorList.findIndex(m => m.slug === monitor.slug);
      if (oldMonitorIdx < 0) {
        return oldMonitorList;
      }

      const oldMonitor = oldMonitorList[oldMonitorIdx];
      const newEnvList = oldMonitor.environments.filter(e => e.name !== env);
      const updatedMonitor = {
        ...oldMonitor,
        environments: newEnvList,
      };

      const left = oldMonitorList.slice(0, oldMonitorIdx);
      const right = oldMonitorList.slice(oldMonitorIdx + 1);

      if (newEnvList.length === 0) {
        return [...left, ...right];
      }

      return [...left, updatedMonitor, ...right];
    });
  };

  const handleToggleMuteEnvironment = async (
    monitor: Monitor,
    env: string,
    isMuted: boolean
  ) => {
    const resp = await setEnvironmentIsMuted(
      api,
      organization.slug,
      monitor,
      env,
      isMuted
    );

    if (resp === null) {
      return;
    }

    const queryKey = makeMonitorListQueryKey(organization, location.query);
    setApiQueryData(queryClient, queryKey, (oldMonitorList: Monitor[]) => {
      const monitorIdx = oldMonitorList.findIndex(m => m.slug === monitor.slug);
      // TODO(davidenwang): in future only change the specifically modified environment for optimistic updates
      oldMonitorList[monitorIdx] = resp;
      return oldMonitorList;
    });
  };

  const handleToggleStatus = async (monitor: Monitor) => {
    const status = monitor.status === 'active' ? 'disabled' : 'active';
    const resp = await updateMonitor(api, organization.slug, monitor, {status});

    if (resp === null) {
      return;
    }

    const queryKey = makeMonitorListQueryKey(organization, location.query);
    setApiQueryData(queryClient, queryKey, (oldMonitorList: Monitor[]) => {
      const monitorIdx = oldMonitorList.findIndex(m => m.slug === monitor.slug);
      oldMonitorList[monitorIdx] = {...oldMonitorList[monitorIdx], status: resp.status};

      return oldMonitorList;
    });
  };

  return (
    <MonitorListPanel>
      <TimelineWidthTracker ref={elementRef} />
      <Header>
        <HeaderControls>
          <ResolutionSelector />
          <SortSelector />
        </HeaderControls>
        <GridLineTimeLabels
          timeWindowConfig={timeWindowConfig}
          start={start}
          end={nowRef.current}
          width={timelineWidth}
        />
      </Header>
      <GridLineOverlay
        stickyCursor
        showCursor={!isLoading}
        timeWindowConfig={timeWindowConfig}
        start={start}
        end={nowRef.current}
        width={timelineWidth}
      />

      {monitorList.map(monitor => (
        <TimelineTableRow
          key={monitor.id}
          monitor={monitor}
          timeWindowConfig={timeWindowConfig}
          start={start}
          bucketedData={monitorStats?.[monitor.slug]}
          end={nowRef.current}
          width={timelineWidth}
          onDeleteEnvironment={env => handleDeleteEnvironment(monitor, env)}
          onToggleMuteEnvironment={(env, isMuted) =>
            handleToggleMuteEnvironment(monitor, env, isMuted)
          }
          onToggleStatus={handleToggleStatus}
        />
      ))}
    </MonitorListPanel>
  );
}

const MonitorListPanel = styled(Panel)`
  display: grid;
  grid-template-columns: 350px 135px 1fr;
`;

const Header = styled(Sticky)`
  display: grid;
  grid-column: 1/-1;
  grid-template-columns: subgrid;

  z-index: 1;
  background: ${p => p.theme.background};
  border-top-left-radius: ${p => p.theme.panelBorderRadius};
  border-top-right-radius: ${p => p.theme.panelBorderRadius};
  box-shadow: 0 1px ${p => p.theme.translucentBorder};

  &[data-stuck] {
    border-radius: 0;
    border-left: 1px solid ${p => p.theme.border};
    border-right: 1px solid ${p => p.theme.border};
    margin: 0 -1px;
  }
`;

const HeaderControls = styled('div')`
  grid-column: 1/3;
  display: flex;
  gap: ${space(0.5)};
  padding: ${space(1.5)} ${space(2)};
`;

const TimelineWidthTracker = styled('div')`
  position: absolute;
  width: 100%;
  grid-row: 1;
  grid-column: 3;
`;