import {Fragment, useCallback, useLayoutEffect} from 'react';
import styled from '@emotion/styled';
import * as echarts from 'echarts/core';

import {Button} from 'sentry/components/button';
import SwitchButton from 'sentry/components/switchButton';
import {IconAdd} from 'sentry/icons';
import {t} from 'sentry/locale';
import {space} from 'sentry/styles/space';
import type {MetricWidgetQueryParams} from 'sentry/utils/metrics/types';
import usePageFilters from 'sentry/utils/usePageFilters';
import {DDM_CHART_GROUP} from 'sentry/views/ddm/constants';
import {useDDMContext} from 'sentry/views/ddm/context';
import {MetricQueryContextMenu} from 'sentry/views/ddm/contextMenu';
import {QueryBuilder} from 'sentry/views/ddm/queryBuilder';
import {QuerySymbol} from 'sentry/views/ddm/querySymbol';

export function Queries() {
  const {
    widgets,
    updateWidget,
    setSelectedWidgetIndex,
    showQuerySymbols,
    selectedWidgetIndex,
    isMultiChartMode,
    setIsMultiChartMode,
    addWidget,
  } = useDDMContext();

  const {selection} = usePageFilters();

  // Make sure all charts are connected to the same group whenever the widgets definition changes
  useLayoutEffect(() => {
    echarts.connect(DDM_CHART_GROUP);
  }, [widgets]);

  const handleChange = useCallback(
    (index: number, widget: Partial<MetricWidgetQueryParams>) => {
      updateWidget(index, widget);
    },
    [updateWidget]
  );

  return (
    <Fragment>
      <Wrapper showQuerySymbols={showQuerySymbols}>
        {widgets.map((widget, index) => (
          <Row key={index} onFocusCapture={() => setSelectedWidgetIndex(index)}>
            <Query
              widget={widget}
              onChange={data => handleChange(index, data)}
              projects={selection.projects}
              symbol={
                showQuerySymbols && (
                  <StyledQuerySymbol
                    index={index}
                    isClickable={isMultiChartMode}
                    isSelected={index === selectedWidgetIndex}
                    onClick={() => setSelectedWidgetIndex(index)}
                    role={isMultiChartMode ? 'button' : undefined}
                    aria-label={t('Select query')}
                  />
                )
              }
              contextMenu={
                <MetricQueryContextMenu
                  displayType={widget.displayType}
                  widgetIndex={index}
                  metricsQuery={{
                    mri: widget.mri,
                    query: widget.query,
                    op: widget.op,
                    groupBy: widget.groupBy,
                    projects: selection.projects,
                    datetime: selection.datetime,
                    environments: selection.environments,
                  }}
                />
              }
            />
          </Row>
        ))}
      </Wrapper>
      <ButtonBar addQuerySymbolSpacing={showQuerySymbols}>
        <Button size="sm" icon={<IconAdd isCircled />} onClick={addWidget}>
          Add query
        </Button>
        <SwitchWrapper>
          {t('One chart per query')}
          <SwitchButton
            isActive={isMultiChartMode}
            toggle={() => setIsMultiChartMode(!isMultiChartMode)}
          />
        </SwitchWrapper>
      </ButtonBar>
    </Fragment>
  );
}

interface Props {
  onChange: (data: Partial<MetricWidgetQueryParams>) => void;
  projects: number[];
  widget: MetricWidgetQueryParams;
  contextMenu?: React.ReactNode;
  symbol?: React.ReactNode;
}

export function Query({widget, projects, onChange, contextMenu, symbol}: Props) {
  return (
    <QueryWrapper hasSymbol={!!symbol}>
      {symbol}
      <QueryBuilder
        onChange={onChange}
        metricsQuery={{
          mri: widget.mri,
          op: widget.op,
          groupBy: widget.groupBy,
          query: widget.query,
        }}
        displayType={widget.displayType}
        isEdit
        projects={projects}
      />
      {contextMenu}
    </QueryWrapper>
  );
}

const QueryWrapper = styled('div')<{hasSymbol: boolean}>`
  display: grid;
  gap: ${space(1)};
  padding-bottom: ${space(1)};
  grid-template-columns: 1fr max-content;
  ${p => p.hasSymbol && `grid-template-columns: min-content 1fr max-content;`}
`;

const StyledQuerySymbol = styled(QuerySymbol)<{isClickable: boolean}>`
  margin-top: 10px;
  ${p => p.isClickable && `cursor: pointer;`}
`;

const Wrapper = styled('div')<{showQuerySymbols: boolean}>`
`;

const Row = styled('div')`
  display: contents;
`;

const ButtonBar = styled('div')<{addQuerySymbolSpacing: boolean}>`
  align-items: center;
  display: flex;
  padding-bottom: ${space(2)};
  padding-top: ${space(1)};
  gap: ${space(2)};

  ${p =>
    p.addQuerySymbolSpacing &&
    `
    padding-left: ${space(1)};
    margin-left: ${space(2)};
  `}
`;

const SwitchWrapper = styled('label')`
  display: flex;
  margin: 0;
  align-items: center;
  gap: ${space(1)};
`;