import {useCallback, useMemo} from 'react';
import * as Sentry from '@sentry/react';

import {navigateTo} from 'sentry/actionCreators/navigation';
import {Button} from 'sentry/components/button';
import ButtonBar from 'sentry/components/buttonBar';
import {DropdownMenu} from 'sentry/components/dropdownMenu';
import {
  IconAdd,
  IconBookmark,
  IconDashboard,
  IconEllipsis,
  IconSettings,
  IconSiren,
} from 'sentry/icons';
import {t} from 'sentry/locale';
import {trackAnalytics} from 'sentry/utils/analytics';
import {isCustomMeasurement} from 'sentry/utils/metrics';
import {MRIToField} from 'sentry/utils/metrics/mri';
import {middleEllipsis} from 'sentry/utils/middleEllipsis';
import useOrganization from 'sentry/utils/useOrganization';
import usePageFilters from 'sentry/utils/usePageFilters';
import useRouter from 'sentry/utils/useRouter';
import {useDDMContext} from 'sentry/views/ddm/context';
import {getCreateAlert} from 'sentry/views/ddm/contextMenu';
import {QuerySymbol} from 'sentry/views/ddm/querySymbol';
import {useCreateDashboard} from 'sentry/views/ddm/useCreateDashboard';

interface Props {
  addCustomMetric: () => void;
  showCustomMetricButton: boolean;
}

export function PageHeaderActions({showCustomMetricButton, addCustomMetric}: Props) {
  const router = useRouter();
  const organization = useOrganization();
  const {selection} = usePageFilters();
  const createDashboard = useCreateDashboard();
  const {
    addWidget,
    isDefaultQuery,
    setDefaultQuery,
    widgets,
    showQuerySymbols,
    selectedWidgetIndex,
  } = useDDMContext();

  const hasEmptyWidget = widgets.length === 0 || widgets.some(widget => !widget.mri);

  const handleToggleDefaultQuery = useCallback(() => {
    if (isDefaultQuery) {
      Sentry.metrics.increment('ddm.remove-default-query');
      trackAnalytics('ddm.remove-default-query', {
        organization,
      });
      setDefaultQuery(null);
    } else {
      Sentry.metrics.increment('ddm.set-default-query');
      trackAnalytics('ddm.set-default-query', {
        organization,
      });
      setDefaultQuery(router.location.query);
    }
  }, [isDefaultQuery, organization, router.location.query, setDefaultQuery]);

  const items = useMemo(
    () => [
      {
        leadingItems: [<IconAdd isCircled key="icon" />],
        key: 'add-query',
        label: t('Add Query'),
        disabled: hasEmptyWidget,
        onAction: () => {
          trackAnalytics('ddm.widget.add', {
            organization,
          });
          Sentry.metrics.increment('ddm.widget.add');
          addWidget();
        },
      },
      {
        leadingItems: [<IconDashboard key="icon" />],
        key: 'add-dashboard',
        label: t('Add to Dashboard'),
        onAction: () => {
          trackAnalytics('ddm.add-to-dashboard', {
            organization,
            source: 'global',
          });
          createDashboard();
        },
      },
      {
        leadingItems: [<IconSettings key="icon" />],
        key: 'metrics-settings',
        label: t('Metrics Settings'),
        onAction: () => navigateTo(`/settings/projects/:projectId/metrics/`, router),
      },
    ],
    [addWidget, createDashboard, hasEmptyWidget, organization, router]
  );

  const alertItems = useMemo(
    () =>
      widgets.map((widget, index) => {
        const createAlert = getCreateAlert(organization, {
          datetime: selection.datetime,
          projects: selection.projects,
          environments: selection.environments,
          query: widget.query,
          mri: widget.mri,
          groupBy: widget.groupBy,
          op: widget.op,
        });
        return {
          leadingItems: showQuerySymbols
            ? [
                <QuerySymbol
                  key="icon"
                  index={index}
                  isSelected={index === selectedWidgetIndex}
                />,
              ]
            : [],
          key: `add-alert-${index}`,
          label: widget.mri
            ? middleEllipsis(MRIToField(widget.mri, widget.op!), 60, /\.|-|_/)
            : t('Select a metric to create an alert'),
          tooltip: isCustomMeasurement({mri: widget.mri})
            ? t('Custom measurements cannot be used to create alerts')
            : undefined,
          disabled: !createAlert,
          onAction: () => {
            trackAnalytics('ddm.create-alert', {
              organization,
              source: 'global',
            });
            createAlert?.();
          },
        };
      }),
    [
      organization,
      selectedWidgetIndex,
      selection.datetime,
      selection.environments,
      selection.projects,
      showQuerySymbols,
      widgets,
    ]
  );

  return (
    <ButtonBar gap={1}>
      {showCustomMetricButton && (
        <Button priority="primary" onClick={() => addCustomMetric()} size="sm">
          {t('Set Up Custom Metrics')}
        </Button>
      )}
      <Button
        size="sm"
        icon={<IconBookmark isSolid={isDefaultQuery} />}
        onClick={handleToggleDefaultQuery}
      >
        {isDefaultQuery ? t('Remove Default') : t('Save as default')}
      </Button>
      {alertItems.length === 1 ? (
        <Button
          size="sm"
          icon={<IconSiren />}
          disabled={!alertItems[0].onAction}
          onClick={alertItems[0].onAction}
        >
          {t('Create Alert')}
        </Button>
      ) : (
        <DropdownMenu
          items={alertItems}
          triggerLabel={t('Create Alert')}
          triggerProps={{
            size: 'sm',
            showChevron: false,
            icon: <IconSiren direction="down" size="sm" />,
          }}
          position="bottom-end"
        />
      )}
      <DropdownMenu
        items={items}
        triggerProps={{
          'aria-label': t('Page actions'),
          size: 'sm',
          showChevron: false,
          icon: <IconEllipsis direction="down" size="xs" />,
        }}
        position="bottom-end"
      />
    </ButtonBar>
  );
}