// Copyright 2022 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only

import Fuse from 'fuse.js';
import React, { useEffect, useState } from 'react';
import classNames from 'classnames';

import type {
  ConversationType,
  ShowConversationType,
} from '../state/ducks/conversations.preload.js';
import type {
  ConversationStoryType,
  MyStoryType,
} from '../types/Stories.std.js';
import type { LocalizerType, ThemeType } from '../types/Util.std.js';
import type { PreferredBadgeSelectorType } from '../state/selectors/badges.preload.js';
import type { ShowToastAction } from '../state/ducks/toast.preload.js';
import type { ViewUserStoriesActionCreatorType } from '../state/ducks/stories.preload.js';
import { MyStoryButton } from './MyStoryButton.dom.js';
import { SearchInput } from './SearchInput.dom.js';
import { StoryListItem } from './StoryListItem.dom.js';
import { isNotNil } from '../util/isNotNil.std.js';
import { NavSidebarSearchHeader, NavSidebarEmpty } from './NavSidebar.dom.js';

const FUSE_OPTIONS: Fuse.IFuseOptions<ConversationStoryType> = {
  getFn: (story, path) => {
    if (path[0] === 'searchNames' || path === 'searchNames') {
      return [story.storyView.sender.title, story.storyView.sender.name].filter(
        isNotNil
      );
    }

    return story.group?.title ?? '';
  },
  keys: [
    {
      name: 'searchNames',
      weight: 1,
    },
    {
      name: 'group',
      weight: 1,
    },
  ],
  threshold: 0.1,
};

function search(
  stories: ReadonlyArray<ConversationStoryType>,
  searchTerm: string
): Array<ConversationStoryType> {
  return new Fuse<ConversationStoryType>(stories, FUSE_OPTIONS)
    .search(searchTerm)
    .map(result => result.item);
}

export type PropsType = {
  getPreferredBadge: PreferredBadgeSelectorType;
  hiddenStories: Array<ConversationStoryType>;
  i18n: LocalizerType;
  maxAttachmentSizeInKb: number;
  me: ConversationType;
  myStories: Array<MyStoryType>;
  onAddStory: (file?: File) => unknown;
  onMyStoriesClicked: () => unknown;
  onStoriesSettings: () => unknown;
  onMediaPlaybackStart: () => void;
  queueStoryDownload: (storyId: string) => unknown;
  showConversation: ShowConversationType;
  showToast: ShowToastAction;
  stories: Array<ConversationStoryType>;
  theme: ThemeType;
  toggleHideStories: (conversationId: string) => unknown;
  viewUserStories: ViewUserStoriesActionCreatorType;
};

export function StoriesPane({
  getPreferredBadge,
  hiddenStories,
  i18n,
  maxAttachmentSizeInKb,
  me,
  myStories,
  onAddStory,
  onMyStoriesClicked,
  onMediaPlaybackStart,
  queueStoryDownload,
  showConversation,
  showToast,
  stories,
  theme,
  toggleHideStories,
  viewUserStories,
}: PropsType): React.JSX.Element {
  const [searchTerm, setSearchTerm] = useState('');
  const [isShowingHiddenStories, setIsShowingHiddenStories] = useState(false);
  const [renderedStories, setRenderedStories] =
    useState<Array<ConversationStoryType>>(stories);

  useEffect(() => {
    if (searchTerm) {
      setRenderedStories(search(stories, searchTerm));
    } else {
      setRenderedStories(stories);
    }
  }, [searchTerm, stories]);
  return (
    <>
      {!stories.length && (
        <NavSidebarEmpty
          title={i18n('icu:Stories__list__empty--title')}
          subtitle={i18n('icu:Stories__list__empty--subtitle')}
        />
      )}
      <NavSidebarSearchHeader>
        <SearchInput
          i18n={i18n}
          onChange={event => {
            setSearchTerm(event.target.value);
          }}
          placeholder={i18n('icu:search')}
          value={searchTerm}
        />
      </NavSidebarSearchHeader>
      <div className="Stories__pane__list">
        <MyStoryButton
          i18n={i18n}
          maxAttachmentSizeInKb={maxAttachmentSizeInKb}
          me={me}
          myStories={myStories}
          onAddStory={onAddStory}
          onClick={onMyStoriesClicked}
          queueStoryDownload={queueStoryDownload}
          showToast={showToast}
          onMediaPlaybackStart={onMediaPlaybackStart}
        />
        {renderedStories.map(story => (
          <StoryListItem
            conversationId={story.conversationId}
            getPreferredBadge={getPreferredBadge}
            hasReplies={story.hasReplies}
            hasRepliesFromSelf={story.hasRepliesFromSelf}
            group={story.group}
            i18n={i18n}
            key={story.storyView.timestamp}
            onGoToConversation={conversationId => {
              showConversation({ conversationId });
            }}
            onHideStory={toggleHideStories}
            onMediaPlaybackStart={onMediaPlaybackStart}
            queueStoryDownload={queueStoryDownload}
            story={story.storyView}
            theme={theme}
            viewUserStories={viewUserStories}
          />
        ))}
        {Boolean(hiddenStories.length) && (
          <>
            <button
              className={classNames('Stories__hidden-stories', {
                'Stories__hidden-stories--collapsed': !isShowingHiddenStories,
                'Stories__hidden-stories--expanded': isShowingHiddenStories,
              })}
              onClick={() => setIsShowingHiddenStories(!isShowingHiddenStories)}
              type="button"
            >
              {i18n('icu:Stories__hidden-stories')}
            </button>
            {isShowingHiddenStories &&
              hiddenStories.map(story => (
                <StoryListItem
                  conversationId={story.conversationId}
                  getPreferredBadge={getPreferredBadge}
                  group={story.group}
                  i18n={i18n}
                  isHidden
                  key={story.storyView.timestamp}
                  onGoToConversation={conversationId => {
                    showConversation({ conversationId });
                  }}
                  onHideStory={toggleHideStories}
                  onMediaPlaybackStart={onMediaPlaybackStart}
                  queueStoryDownload={queueStoryDownload}
                  story={story.storyView}
                  theme={theme}
                  viewUserStories={viewUserStories}
                />
              ))}
          </>
        )}
      </div>
    </>
  );
}
