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

import type {ButtonProps} from 'sentry/components/button';
import {Button} from 'sentry/components/button';
import {CompactSelect} from 'sentry/components/compactSelect';
import Input from 'sentry/components/input';
import LoadingIndicator from 'sentry/components/loadingIndicator';
import PageFilterBar from 'sentry/components/organizations/pageFilterBar';
import Tag from 'sentry/components/tag';
import {
  IconCheckmark,
  IconClose,
  IconLightning,
  IconReleases,
  IconSliders,
} from 'sentry/icons';
import {t} from 'sentry/locale';
import {space} from 'sentry/styles/space';
import type {MetricMeta, MRI} from 'sentry/types';
import {
  isAllowedOp,
  isCustomMetric,
  isMeasurement,
  isSpanMetric,
  isTransactionDuration,
  stringifyMetricWidget,
} from 'sentry/utils/metrics';
import {getReadableMetricType} from 'sentry/utils/metrics/formatters';
import type {
  MetricsQuery,
  MetricsQuerySubject,
  MetricWidgetQueryParams,
} from 'sentry/utils/metrics/types';
import {MetricDisplayType} from 'sentry/utils/metrics/types';
import {useMetricsTags} from 'sentry/utils/metrics/useMetricsTags';
import {MetricSearchBar} from 'sentry/views/ddm/metricSearchBar';

import {formatMRI} from '../../../../utils/metrics/mri';
import {useMetricsDashboardContext} from '../metricsContext';

type InlineEditorProps = {
  displayType: MetricDisplayType;
  isEdit: boolean;
  metricsQuery: MetricsQuerySubject;
  onCancel: () => void;
  onChange: (data: Partial<MetricWidgetQueryParams>) => void;
  onSubmit: () => void;
  projects: number[];
  title: string;
  onTitleChange?: (title: string) => void;
  powerUserMode?: boolean;
  size?: 'xs' | 'sm';
};

const isShownByDefault = (metric: MetricMeta) =>
  isCustomMetric(metric) ||
  isTransactionDuration(metric) ||
  isMeasurement(metric) ||
  isSpanMetric(metric);

export const InlineEditor = memo(function InlineEditor({
  metricsQuery,
  projects,
  displayType,
  onChange,
  onCancel,
  onSubmit,
  onTitleChange,
  title,
  isEdit,
  size = 'sm',
}: InlineEditorProps) {
  const [editingName, setEditingName] = useState(false);
  const {metricsMeta: meta, isLoading: isMetaLoading} = useMetricsDashboardContext();

  const {data: tags = []} = useMetricsTags(metricsQuery.mri, {projects});

  const displayedMetrics = useMemo(() => {
    const isSelected = (metric: MetricMeta) => metric.mri === metricsQuery.mri;
    return meta
      .filter(metric => isShownByDefault(metric) || isSelected(metric))
      .sort(metric => (isSelected(metric) ? -1 : 1));
  }, [meta, metricsQuery.mri]);

  const selectedMeta = useMemo(() => {
    return meta.find(metric => metric.mri === metricsQuery.mri);
  }, [meta, metricsQuery.mri]);

  // Reset the query data if the selected metric is no longer available
  useEffect(() => {
    if (
      metricsQuery.mri &&
      !isMetaLoading &&
      !displayedMetrics.find(metric => metric.mri === metricsQuery.mri)
    ) {
      onChange({mri: '' as MRI, op: '', groupBy: []});
    }
  }, [isMetaLoading, displayedMetrics, metricsQuery.mri, onChange]);

  const [loading, setIsLoading] = useState(false);
  useEffect(() => {
    if (loading && !isEdit) {
      setIsLoading(false);
    }
  }, [isEdit, loading]);

  return (
    <InlineEditorWrapper>
      <QueryDefinitionWrapper>
        <FirstRowWrapper>
          <DropdownInputWrapper>
            {editingName && (
              <WidgetTitleInput
                value={title}
                size="sm"
                placeholder={stringifyMetricWidget(metricsQuery)}
                onChange={e => {
                  onTitleChange?.(e.target.value);
                }}
              />
            )}
            <Dropdowns hidden={editingName}>
              <CompactSelect
                size={size}
                searchable
                sizeLimit={100}
                triggerProps={{prefix: t('Metric'), size}}
                options={displayedMetrics.map(metric => ({
                  label: formatMRI(metric.mri),
                  // enable search by mri, name, unit (millisecond), type (c:), and readable type (counter)
                  textValue: `${metric.mri}${getReadableMetricType(metric.type)}`,
                  value: metric.mri,
                  size,
                  trailingItems: () => (
                    <Fragment>
                      <TagWithSize size={size} tooltipText={t('Type')}>
                        {getReadableMetricType(metric.type)}
                      </TagWithSize>
                      <TagWithSize size={size} tooltipText={t('Unit')}>
                        {metric.unit}
                      </TagWithSize>
                    </Fragment>
                  ),
                }))}
                value={metricsQuery.mri}
                onChange={option => {
                  const availableOps =
                    meta
                      .find(metric => metric.mri === option.value)
                      ?.operations.filter(isAllowedOp) ?? [];

                  // @ts-expect-error .op is an operation
                  const selectedOp = availableOps.includes(metricsQuery.op ?? '')
                    ? metricsQuery.op
                    : availableOps?.[0];

                  onChange({
                    mri: option.value,
                    op: selectedOp,
                    groupBy: undefined,
                    focusedSeries: undefined,
                    displayType: getWidgetDisplayType(option.value, selectedOp),
                  });
                }}
              />
              <CompactSelect
                size={size}
                triggerProps={{prefix: t('Op'), size}}
                options={
                  selectedMeta?.operations.filter(isAllowedOp).map(op => ({
                    label: op,
                    value: op,
                  })) ?? []
                }
                disabled={!metricsQuery.mri}
                value={metricsQuery.op}
                onChange={option => {
                  onChange({
                    op: option.value,
                  });
                }}
              />
              <CompactSelect
                size={size}
                multiple
                triggerProps={{prefix: t('Group by'), size}}
                options={tags.map(tag => ({
                  label: tag.key,
                  value: tag.key,
                  size,
                  trailingItems: (
                    <Fragment>
                      {tag.key === 'release' && <IconReleases size={size} />}
                      {tag.key === 'transaction' && <IconLightning size={size} />}
                    </Fragment>
                  ),
                }))}
                disabled={!metricsQuery.mri}
                value={metricsQuery.groupBy}
                onChange={options => {
                  onChange({
                    groupBy: options.map(o => o.value),
                    focusedSeries: undefined,
                  });
                }}
              />
              <CompactSelect
                size={size}
                triggerProps={{prefix: t('Display'), size}}
                value={displayType}
                options={[
                  {
                    value: MetricDisplayType.LINE,
                    label: t('Line'),
                  },
                  {
                    value: MetricDisplayType.AREA,
                    label: t('Area'),
                  },
                  {
                    value: MetricDisplayType.BAR,
                    label: t('Bar'),
                  },
                ]}
                onChange={({value}) => {
                  onChange({displayType: value});
                }}
              />
            </Dropdowns>
          </DropdownInputWrapper>
          <ActionButtonsWrapper>
            <ToggleNameEditButton
              onClick={() => setEditingName(curr => !curr)}
              aria-label="edit name"
            />
          </ActionButtonsWrapper>
        </FirstRowWrapper>
        <MetricSearchBarWrapper>
          {!editingName && (
            <MetricSearchBar
              mri={metricsQuery.mri}
              disabled={!metricsQuery.mri}
              onChange={query => {
                onChange({query});
              }}
              query={metricsQuery.query}
            />
          )}
        </MetricSearchBarWrapper>
      </QueryDefinitionWrapper>

      <ActionButtonsWrapper>
        <SubmitButton
          size={size}
          loading={loading}
          onClick={() => {
            onSubmit();
            setIsLoading(true);
          }}
          aria-label="apply"
        />
        <Button
          size={size}
          onClick={onCancel}
          icon={<IconClose size="xs" />}
          aria-label="cancel"
        />
      </ActionButtonsWrapper>
    </InlineEditorWrapper>
  );
});

function SubmitButton({loading, ...buttonProps}: {loading: boolean} & ButtonProps) {
  if (loading) {
    return (
      <LoadingIndicatorButton {...buttonProps} priority="primary">
        <LoadingIndicator mini size={20} />
      </LoadingIndicatorButton>
    );
  }

  return (
    <Button {...buttonProps} priority="primary" icon={<IconCheckmark size="xs" />} />
  );
}

function ToggleNameEditButton(props: ButtonProps) {
  return (
    <StyledIconButton
      {...props}
      borderless
      size="sm"
      onClick={props.onClick}
      icon={<IconSliders />}
    />
  );
}

function getWidgetDisplayType(
  mri: MetricsQuery['mri'],
  op: MetricsQuery['op']
): MetricDisplayType {
  if (mri?.startsWith('c') || op === 'count') {
    return MetricDisplayType.BAR;
  }
  return MetricDisplayType.LINE;
}

function TagWithSize({size, children, ...props}: {size: 'sm' | 'xs'} & any) {
  if (size === 'sm') {
    return <Tag {...props}>{children}</Tag>;
  }
  return <TagXS {...props}>{children}</TagXS>;
}

const TagXS = styled(Tag)`
  font-size: ${p => p.theme.fontSizeExtraSmall};
  height: ${space(2)};
  line-height: ${space(2)};

  span,
  div {
    height: ${space(2)};
    line-height: ${space(2)};
  }
`;

const LoadingIndicatorButton = styled(Button)`
  padding: 0;
  padding-left: ${space(0.75)};
  pointer-events: none;

  div.loading.mini {
    height: ${space(3)};
    width: 26px;
  }
`;

const EDITOR_ELEMENT_HEIGHT = `34px`;

const InlineEditorWrapper = styled('div')`
  display: flex;
  flex-direction: row;
  padding: ${space(1)};
  gap: ${space(1)};
  width: 100%;
  /* minimal z-index that allows dropdowns to expand over other dashboard elements */
  z-index: 6;
`;

const QueryDefinitionWrapper = styled('div')`
  display: grid;
  gap: ${space(0.5)};
  background: ${p => p.theme.background};
  z-index: 1;
`;

const ActionButtonsWrapper = styled('div')`
  display: flex;
  align-content: flex-start;
  flex-wrap: wrap;
  gap: ${space(0.5)};
`;

const FirstRowWrapper = styled('div')`
  display: flex;
  gap: ${space(0.5)};
`;

const DropdownInputWrapper = styled('div')`
  display: grid;
`;

const MetricSearchBarWrapper = styled('div')``;

const Dropdowns = styled(PageFilterBar)<{hidden: boolean}>`
  max-width: max-content;
  /* hide the dropdowns when the title is being edited, used to match title input width
     and prevent layout shifts */
  height: ${p => (p.hidden ? '0' : 'auto')};
  overflow: ${p => (p.hidden ? 'hidden' : 'initial')};
  flex-wrap: wrap;
`;

const WidgetTitleInput = styled(Input)`
  height: ${EDITOR_ELEMENT_HEIGHT};
`;

const StyledIconButton = styled(Button)`
  height: ${EDITOR_ELEMENT_HEIGHT};
`;