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

import Button from 'sentry/components/button';
import ButtonBar from 'sentry/components/buttonBar';
import {SectionHeading} from 'sentry/components/charts/styles';
import Count from 'sentry/components/count';
import GridEditable, {
  COL_WIDTH_UNDEFINED,
  GridColumnOrder,
} from 'sentry/components/gridEditable';
import PerformanceDuration from 'sentry/components/performanceDuration';
import {ArrayLinks} from 'sentry/components/profiling/arrayLinks';
import {IconChevron} from 'sentry/icons';
import {t} from 'sentry/locale';
import space from 'sentry/styles/space';
import {Project} from 'sentry/types';
import {FunctionCall} from 'sentry/types/profiling/core';
import {Container, NumberContainer} from 'sentry/utils/discover/styles';
import {getShortEventId} from 'sentry/utils/events';
import {formatPercentage} from 'sentry/utils/formatters';
import {generateProfileFlamegraphRouteWithQuery} from 'sentry/utils/profiling/routes';
import {renderTableHead} from 'sentry/utils/profiling/tableRenderer';
import {useLocation} from 'sentry/utils/useLocation';
import useOrganization from 'sentry/utils/useOrganization';

interface FunctionsTableProps {
  error: string | null;
  functionCalls: FunctionCall[];
  isLoading: boolean;
  project: Project;
  limit?: number;
}

function FunctionsTable(props: FunctionsTableProps) {
  const limit = props.limit ?? 5;
  const [offset, setOffset] = useState(0);

  const location = useLocation();
  const organization = useOrganization();

  const allFunctions: TableDataRow[] = useMemo(() => {
    return props.functionCalls.map(functionCall => ({
      symbol: functionCall.symbol,
      image: functionCall.image,
      p50Duration: functionCall.duration_ns.p50,
      p75Duration: functionCall.duration_ns.p75,
      p90Duration: functionCall.duration_ns.p90,
      p95Duration: functionCall.duration_ns.p95,
      p99Duration: functionCall.duration_ns.p99,
      mainThreadPercent: functionCall.main_thread_percent,
      p50Frequency: functionCall.frequency.p50,
      p75Frequency: functionCall.frequency.p75,
      p90Frequency: functionCall.frequency.p90,
      p95Frequency: functionCall.frequency.p95,
      p99Frequency: functionCall.frequency.p99,
      profileIdToThreadId: Object.entries(functionCall.profile_id_to_thread_id).map(
        ([profileId, threadId]) => {
          return {
            value: getShortEventId(profileId),
            target: generateProfileFlamegraphRouteWithQuery({
              orgSlug: organization.slug,
              projectSlug: props.project.slug,
              profileId,
              query: {tid: threadId.toString()},
            }),
          };
        }
      ),
    }));
  }, [organization.slug, props.project.slug, props.functionCalls]);

  const functions: TableDataRow[] = useMemo(() => {
    return allFunctions.slice(offset, offset + limit);
  }, [allFunctions, limit, offset]);

  return (
    <Fragment>
      <TableHeader>
        <SectionHeading>{t('Suspect Functions')}</SectionHeading>
        <ButtonBar merged>
          <Button
            icon={<IconChevron direction="left" size="sm" />}
            aria-label={t('Previous')}
            size="xsmall"
            disabled={offset === 0}
            onClick={() => setOffset(offset - limit)}
          />
          <Button
            icon={<IconChevron direction="right" size="sm" />}
            aria-label={t('Next')}
            size="xsmall"
            disabled={offset + limit >= allFunctions.length}
            onClick={() => setOffset(offset + limit)}
          />
        </ButtonBar>
      </TableHeader>
      <GridEditable
        isLoading={props.isLoading}
        error={props.error}
        data={functions}
        columnOrder={COLUMN_ORDER.map(key => COLUMNS[key])}
        columnSortBy={[]}
        grid={{
          renderHeadCell: renderTableHead(RIGHT_ALIGNED_COLUMNS),
          renderBodyCell: renderFunctionsTableCell,
        }}
        location={location}
      />
    </Fragment>
  );
}

const RIGHT_ALIGNED_COLUMNS = new Set<TableColumnKey>([
  'p50Duration',
  'p75Duration',
  'p90Duration',
  'p95Duration',
  'p99Duration',
  'mainThreadPercent',
  'p50Frequency',
  'p75Frequency',
  'p90Frequency',
  'p95Frequency',
  'p99Frequency',
]);

function renderFunctionsTableCell(
  column: TableColumn,
  dataRow: TableDataRow,
  rowIndex: number,
  columnIndex: number
) {
  return (
    <ProfilingFunctionsTableCell
      column={column}
      dataRow={dataRow}
      rowIndex={rowIndex}
      columnIndex={columnIndex}
    />
  );
}

interface ProfilingFunctionsTableCellProps {
  column: TableColumn;
  columnIndex: number;
  dataRow: TableDataRow;
  rowIndex: number;
}

function ProfilingFunctionsTableCell({
  column,
  dataRow,
}: ProfilingFunctionsTableCellProps) {
  const value = dataRow[column.key];

  switch (column.key) {
    case 'p50Frequency':
    case 'p75Frequency':
    case 'p90Frequency':
    case 'p95Frequency':
    case 'p99Frequency':
      return (
        <NumberContainer>
          <Count value={value} />
        </NumberContainer>
      );
    case 'mainThreadPercent':
      return <NumberContainer>{formatPercentage(value)}</NumberContainer>;
    case 'p50Duration':
    case 'p75Duration':
    case 'p90Duration':
    case 'p95Duration':
    case 'p99Duration':
      return (
        <NumberContainer>
          <PerformanceDuration nanoseconds={value} abbreviation />
        </NumberContainer>
      );
    case 'profileIdToThreadId':
      return <ArrayLinks items={value} />;
    default:
      return <Container>{value}</Container>;
  }
}

type TableColumnKey =
  | 'symbol'
  | 'image'
  | 'p50Duration'
  | 'p75Duration'
  | 'p90Duration'
  | 'p95Duration'
  | 'p99Duration'
  | 'mainThreadPercent'
  | 'p50Frequency'
  | 'p75Frequency'
  | 'p90Frequency'
  | 'p95Frequency'
  | 'p99Frequency'
  | 'profileIdToThreadId';

type TableDataRow = Record<TableColumnKey, any>;

type TableColumn = GridColumnOrder<TableColumnKey>;

const COLUMN_ORDER: TableColumnKey[] = [
  'symbol',
  'image',
  'p75Duration',
  'p99Duration',
  'mainThreadPercent',
  'p75Frequency',
  'p99Frequency',
  'profileIdToThreadId',
];

// TODO: looks like these column names change depending on the platform?
const COLUMNS: Record<TableColumnKey, TableColumn> = {
  symbol: {
    key: 'symbol',
    name: t('Symbol'),
    width: COL_WIDTH_UNDEFINED,
  },
  image: {
    key: 'image',
    name: t('Binary'),
    width: COL_WIDTH_UNDEFINED,
  },
  p50Duration: {
    key: 'p50Duration',
    name: t('P50 Duration'),
    width: COL_WIDTH_UNDEFINED,
  },
  p75Duration: {
    key: 'p75Duration',
    name: t('P75 Duration'),
    width: COL_WIDTH_UNDEFINED,
  },
  p90Duration: {
    key: 'p90Duration',
    name: t('P90 Duration'),
    width: COL_WIDTH_UNDEFINED,
  },
  p95Duration: {
    key: 'p95Duration',
    name: t('P95 Duration'),
    width: COL_WIDTH_UNDEFINED,
  },
  p99Duration: {
    key: 'p99Duration',
    name: t('P99 Duration'),
    width: COL_WIDTH_UNDEFINED,
  },
  mainThreadPercent: {
    key: 'mainThreadPercent',
    name: t('Main Thread %'),
    width: COL_WIDTH_UNDEFINED,
  },
  p50Frequency: {
    key: 'p50Frequency',
    name: t('P50 Frequency'),
    width: COL_WIDTH_UNDEFINED,
  },
  p75Frequency: {
    key: 'p75Frequency',
    name: t('P75 Frequency'),
    width: COL_WIDTH_UNDEFINED,
  },
  p90Frequency: {
    key: 'p90Frequency',
    name: t('P90 Frequency'),
    width: COL_WIDTH_UNDEFINED,
  },
  p95Frequency: {
    key: 'p95Frequency',
    name: t('P95 Frequency'),
    width: COL_WIDTH_UNDEFINED,
  },
  p99Frequency: {
    key: 'p99Frequency',
    name: t('P99 Frequency'),
    width: COL_WIDTH_UNDEFINED,
  },
  profileIdToThreadId: {
    key: 'profileIdToThreadId',
    name: t('Example Profiles'),
    width: COL_WIDTH_UNDEFINED,
  },
};

const TableHeader = styled('div')`
  display: flex;
  justify-content: space-between;
  margin-bottom: ${space(1)};
`;

export {FunctionsTable};