/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */

import * as React from 'react';
import {Fragment, useContext} from 'react';

import InspectedElementBadges from '../Components/InspectedElementBadges';
import {ProfilerContext} from './ProfilerContext';
import {formatDuration} from './utils';
import WhatChanged from './WhatChanged';
import {StoreContext} from '../context';

import styles from './HoveredFiberInfo.css';

import type {ChartNode} from './FlamegraphChartBuilder';

export type TooltipFiberData = {
  id: number,
  name: string,
};

export type Props = {
  fiberData: ChartNode,
};

export default function HoveredFiberInfo({fiberData}: Props): React.Node {
  const {profilerStore} = useContext(StoreContext);
  const {rootID, selectedCommitIndex} = useContext(ProfilerContext);

  const {id, name} = fiberData;
  const {profilingCache} = profilerStore;

  if (rootID === null || selectedCommitIndex === null) {
    return null;
  }

  const commitIndices = profilingCache.getFiberCommits({
    fiberID: id,
    rootID,
  });

  const {nodes} = profilingCache.getCommitTree({
    rootID,
    commitIndex: selectedCommitIndex,
  });
  const node = nodes.get(id);

  let renderDurationInfo = null;
  let i = 0;
  for (i = 0; i < commitIndices.length; i++) {
    const commitIndex = commitIndices[i];
    if (selectedCommitIndex === commitIndex) {
      const {fiberActualDurations, fiberSelfDurations} =
        profilerStore.getCommitData(rootID as any as number, commitIndex);
      const actualDuration = fiberActualDurations.get(id) || 0;
      const selfDuration = fiberSelfDurations.get(id) || 0;

      renderDurationInfo = (
        <div key={commitIndex} className={styles.CurrentCommit}>
          <strong>Duration:</strong> {formatDuration(selfDuration)}ms of{' '}
          {formatDuration(actualDuration)}ms
        </div>
      );

      break;
    }
  }

  return (
    <Fragment>
      <div className={styles.Toolbar}>
        <div className={styles.Component}>{name}</div>

        {node != null && (
          <div className={styles.BadgesContainer}>
            <InspectedElementBadges
              hocDisplayNames={node.hocDisplayNames}
              compiledWithForget={node.compiledWithForget}
            />

            {node.compiledWithForget && (
              <div>
                ✨ This component has been auto-memoized by the React Compiler.
              </div>
            )}
          </div>
        )}

        <div className={styles.Content}>
          {renderDurationInfo || <div>Did not client render.</div>}

          <WhatChanged fiberID={id} displayMode="compact" />
        </div>
      </div>
    </Fragment>
  );
}