import PropTypes from 'prop-types';
import { PureComponent } from 'react';

import { defineMessages, injectIntl } from 'react-intl';

import classNames from 'classnames';
import { Redirect, Route, withRouter } from 'react-router-dom';

import { connect } from 'react-redux';

import { debounce } from 'lodash';

import { focusApp, unfocusApp, changeLayout } from 'mastodon/actions/app';
import { synchronouslySubmitMarkers, submitMarkers, fetchMarkers } from 'mastodon/actions/markers';
import { fetchNotifications } from 'mastodon/actions/notification_groups';
import { INTRODUCTION_VERSION } from 'mastodon/actions/onboarding';
import { AlertsController } from 'mastodon/components/alerts_controller';
import { Hotkeys } from 'mastodon/components/hotkeys';
import { HoverCardController } from 'mastodon/components/hover_card_controller';
import { PictureInPicture } from 'mastodon/features/picture_in_picture';
import { identityContextPropShape, withIdentity } from 'mastodon/identity_context';
import { layoutFromWindow } from 'mastodon/is_mobile';
import { WithRouterPropTypes } from 'mastodon/utils/react_router';

import { handleAnimateGif } from '../emoji/handlers';
import { uploadCompose, resetCompose, changeComposeSpoilerness } from '../../actions/compose';
import { clearHeight } from '../../actions/height_cache';
import { fetchServer, fetchServerTranslationLanguages } from '../../actions/server';
import { expandHomeTimeline } from '../../actions/timelines';
import { initialState, me, owner, singleUserMode, trendsEnabled, landingPage, localLiveFeedAccess, disableHoverCards, autoPlayGif } from '../../initial_state';

import BundleColumnError from './components/bundle_column_error';
import { NavigationBar } from './components/navigation_bar';
import { UploadArea } from './components/upload_area';
import { HashtagMenuController } from './components/hashtag_menu_controller';
import ColumnsAreaContainer from './containers/columns_area_container';
import LoadingBarContainer from './containers/loading_bar_container';
import ModalContainer from './containers/modal_container';
import {
  Compose,
  Status,
  GettingStarted,
  KeyboardShortcuts,
  Firehose,
  AccountTimeline,
  AccountGallery,
  HomeTimeline,
  Followers,
  Following,
  Reblogs,
  Favourites,
  DirectTimeline,
  HashtagTimeline,
  Notifications,
  NotificationRequests,
  NotificationRequest,
  FollowRequests,
  FavouritedStatuses,
  BookmarkedStatuses,
  FollowedTags,
  LinkTimeline,
  ListTimeline,
  Lists,
  ListEdit,
  ListMembers,
  Blocks,
  DomainBlocks,
  Mutes,
  PinnedStatuses,
  Directory,
  OnboardingProfile,
  OnboardingFollows,
  Explore,
  Search,
  About,
  PrivacyPolicy,
  TermsOfService,
  AccountFeatured,
  Quotes,
} from './util/async-components';
import { ColumnsContextProvider } from './util/columns_context';
import { focusColumn, getFocusedItemIndex, focusItemSibling } from './util/focusUtils';
import { WrappedSwitch, WrappedRoute } from './util/react_router_helpers';

// Dummy import, to make sure that <Status /> ends up in the application bundle.
// Without this it ends up in ~8 very commonly used bundles.
import '../../components/status';

const messages = defineMessages({
  beforeUnload: { id: 'ui.beforeunload', defaultMessage: 'Your draft will be lost if you leave Mastodon.' },
});

const mapStateToProps = state => ({
  layout: state.getIn(['meta', 'layout']),
  isComposing: state.getIn(['compose', 'is_composing']),
  hasComposingContents: state.getIn(['compose', 'text']).trim().length !== 0 || state.getIn(['compose', 'media_attachments']).size > 0 || state.getIn(['compose', 'poll']) !== null || state.getIn(['compose', 'quoted_status_id']) !== null,
  canUploadMore: !state.getIn(['compose', 'media_attachments']).some(x => ['audio', 'video'].includes(x.get('type'))) && state.getIn(['compose', 'media_attachments']).size < state.getIn(['server', 'server', 'configuration', 'statuses', 'max_media_attachments']),
  firstLaunch: state.getIn(['settings', 'introductionVersion'], 0) < INTRODUCTION_VERSION,
  newAccount: !state.getIn(['accounts', me, 'note']) && !state.getIn(['accounts', me, 'bot']) && state.getIn(['accounts', me, 'following_count'], 0) === 0 && state.getIn(['accounts', me, 'statuses_count'], 0) === 0,
  username: state.getIn(['accounts', me, 'username']),
});

class SwitchingColumnsArea extends PureComponent {
  static propTypes = {
    identity: identityContextPropShape,
    children: PropTypes.node,
    location: PropTypes.object,
    singleColumn: PropTypes.bool,
    forceOnboarding: PropTypes.bool,
  };

  UNSAFE_componentWillMount () {
    document.body.classList.toggle('layout-single-column', this.props.singleColumn);
    document.body.classList.toggle('layout-multiple-columns', !this.props.singleColumn);
  }

  componentDidUpdate (prevProps) {
    if (![this.props.location.pathname, '/'].includes(prevProps.location.pathname)) {
      this.node.handleChildrenContentChange();
    }

    if (prevProps.singleColumn !== this.props.singleColumn) {
      document.body.classList.toggle('layout-single-column', this.props.singleColumn);
      document.body.classList.toggle('layout-multiple-columns', !this.props.singleColumn);
    }
  }

  setRef = c => {
    if (c) {
      this.node = c;
    }
  };

  render () {
    const { children, singleColumn, forceOnboarding } = this.props;
    const { signedIn } = this.props.identity;
    const pathName = this.props.location.pathname;

    let redirect;

    if (signedIn) {
      if (forceOnboarding) {
        redirect = <Redirect from='/' to='/start' exact />;
      } else if (singleColumn) {
        redirect = <Redirect from='/' to='/home' exact />;
      } else {
        redirect = <Redirect from='/' to='/deck/getting-started' exact />;
      }
    } else if (singleUserMode && owner && initialState?.accounts[owner]) {
      redirect = <Redirect from='/' to={`/@${initialState.accounts[owner].username}`} exact />;
    } else if (trendsEnabled && landingPage === 'trends') {
      redirect = <Redirect from='/' to='/explore' exact />;
    } else if (localLiveFeedAccess === 'public' && landingPage === 'local_feed') {
      redirect = <Redirect from='/' to='/public/local' exact />;
    } else {
      redirect = <Redirect from='/' to='/about' exact />;
    }

    return (
      <ColumnsContextProvider multiColumn={!singleColumn}>
        <ColumnsAreaContainer ref={this.setRef} singleColumn={singleColumn}>
          <WrappedSwitch>
            {redirect}

            {singleColumn ? <Redirect from='/deck' to='/home' exact /> : null}
            {singleColumn && pathName.startsWith('/deck/') ? <Redirect from={pathName} to={{...this.props.location, pathname: pathName.slice(5)}} /> : null}
            {/* Redirect old bookmarks (without /deck) with home-like routes to the advanced interface */}
            {!singleColumn && pathName === '/home' ? <Redirect from='/home' to='/deck/getting-started' exact /> : null}
            {pathName === '/getting-started' ? <Redirect from='/getting-started' to={singleColumn ? '/home' : '/deck/getting-started'} exact /> : null}

            <WrappedRoute path='/getting-started' component={GettingStarted} content={children} />
            <WrappedRoute path='/keyboard-shortcuts' component={KeyboardShortcuts} content={children} />
            <WrappedRoute path='/about' component={About} content={children} />
            <WrappedRoute path='/privacy-policy' component={PrivacyPolicy} content={children} />
            <WrappedRoute path='/terms-of-service/:date?' component={TermsOfService} content={children} />

            <WrappedRoute path={['/home', '/timelines/home']} component={HomeTimeline} content={children} />
            <Redirect from='/timelines/public' to='/public' exact />
            <Redirect from='/timelines/public/local' to='/public/local' exact />
            <WrappedRoute path='/public' exact component={Firehose} componentParams={{ feedType: 'public' }} content={children} />
            <WrappedRoute path='/public/local' exact component={Firehose} componentParams={{ feedType: 'community' }} content={children} />
            <WrappedRoute path='/public/remote' exact component={Firehose} componentParams={{ feedType: 'public:remote' }} content={children} />
            <WrappedRoute path={['/conversations', '/timelines/direct']} component={DirectTimeline} content={children} />
            <WrappedRoute path='/tags/:id' component={HashtagTimeline} content={children} />
            <WrappedRoute path='/links/:url' component={LinkTimeline} content={children} />
            <WrappedRoute path='/lists/new' component={ListEdit} content={children} />
            <WrappedRoute path='/lists/:id/edit' component={ListEdit} content={children} />
            <WrappedRoute path='/lists/:id/members' component={ListMembers} content={children} />
            <WrappedRoute path='/lists/:id' component={ListTimeline} content={children} />
            <WrappedRoute path='/notifications' component={Notifications} content={children} exact />
            <WrappedRoute path='/notifications/requests' component={NotificationRequests} content={children} exact />
            <WrappedRoute path='/notifications/requests/:id' component={NotificationRequest} content={children} exact />
            <WrappedRoute path='/favourites' component={FavouritedStatuses} content={children} />

            <WrappedRoute path='/bookmarks' component={BookmarkedStatuses} content={children} />
            <WrappedRoute path='/pinned' component={PinnedStatuses} content={children} />

            <WrappedRoute path={['/start', '/start/profile']} exact component={OnboardingProfile} content={children} />
            <WrappedRoute path='/start/follows' component={OnboardingFollows} content={children} />
            <WrappedRoute path='/directory' component={Directory} content={children} />
            <WrappedRoute path='/explore' component={Explore} content={children} />
            <WrappedRoute path='/search' component={Search} content={children} />
            <WrappedRoute path={['/publish', '/statuses/new']} component={Compose} content={children} />

            <WrappedRoute path={['/@:acct', '/accounts/:id']} exact component={AccountTimeline} content={children} />
            <WrappedRoute path={['/@:acct/featured', '/accounts/:id/featured']} component={AccountFeatured} content={children} />
            <WrappedRoute path='/@:acct/tagged/:tagged?' exact component={AccountTimeline} content={children} />
            <WrappedRoute path={['/@:acct/with_replies', '/accounts/:id/with_replies']} component={AccountTimeline} content={children} componentParams={{ withReplies: true }} />
            <WrappedRoute path={['/accounts/:id/followers', '/users/:acct/followers', '/@:acct/followers']} component={Followers} content={children} />
            <WrappedRoute path={['/accounts/:id/following', '/users/:acct/following', '/@:acct/following']} component={Following} content={children} />
            <WrappedRoute path={['/@:acct/media', '/accounts/:id/media']} component={AccountGallery} content={children} />
            <WrappedRoute path='/@:acct/:statusId' exact component={Status} content={children} />
            <WrappedRoute path='/@:acct/:statusId/reblogs' component={Reblogs} content={children} />
            <WrappedRoute path='/@:acct/:statusId/favourites' component={Favourites} content={children} />
            <WrappedRoute path='/@:acct/:statusId/quotes' component={Quotes} content={children} />

            {/* Legacy routes, cannot be easily factored with other routes because they share a param name */}
            <WrappedRoute path='/timelines/tag/:id' component={HashtagTimeline} content={children} />
            <WrappedRoute path='/timelines/list/:id' component={ListTimeline} content={children} />
            <WrappedRoute path='/statuses/:statusId' exact component={Status} content={children} />
            <WrappedRoute path='/statuses/:statusId/reblogs' component={Reblogs} content={children} />
            <WrappedRoute path='/statuses/:statusId/favourites' component={Favourites} content={children} />

            <WrappedRoute path='/follow_requests' component={FollowRequests} content={children} />
            <WrappedRoute path='/blocks' component={Blocks} content={children} />
            <WrappedRoute path='/domain_blocks' component={DomainBlocks} content={children} />
            <WrappedRoute path='/followed_tags' component={FollowedTags} content={children} />
            <WrappedRoute path='/mutes' component={Mutes} content={children} />
            <WrappedRoute path='/lists' component={Lists} content={children} />

            <Route component={BundleColumnError} />
          </WrappedSwitch>
        </ColumnsAreaContainer>
      </ColumnsContextProvider>
    );
  }

}

class UI extends PureComponent {
  static propTypes = {
    identity: identityContextPropShape,
    dispatch: PropTypes.func.isRequired,
    children: PropTypes.node,
    isComposing: PropTypes.bool,
    hasComposingContents: PropTypes.bool,
    canUploadMore: PropTypes.bool,
    intl: PropTypes.object.isRequired,
    layout: PropTypes.string.isRequired,
    firstLaunch: PropTypes.bool,
    newAccount: PropTypes.bool,
    username: PropTypes.string,
    ...WithRouterPropTypes,
  };

  state = {
    draggingOver: false,
  };

  handleBeforeUnload = e => {
    const { intl, dispatch, isComposing, hasComposingContents } = this.props;

    dispatch(synchronouslySubmitMarkers());

    if (isComposing && hasComposingContents) {
      e.preventDefault();
      // Setting returnValue to any string causes confirmation dialog.
      // Many browsers no longer display this text to users,
      // but we set user-friendly message for other browsers, e.g. Edge.
      e.returnValue = intl.formatMessage(messages.beforeUnload);
    }
  };

  handleWindowFocus = () => {
    this.props.dispatch(focusApp());
    this.props.dispatch(submitMarkers({ immediate: true }));
  };

  handleWindowBlur = () => {
    this.props.dispatch(unfocusApp());
  };

  handleDragEnter = (e) => {
    e.preventDefault();

    if (!this.dragTargets) {
      this.dragTargets = [];
    }

    if (this.dragTargets.indexOf(e.target) === -1) {
      this.dragTargets.push(e.target);
    }

    if (e.dataTransfer && Array.from(e.dataTransfer.types).includes('Files') && this.props.canUploadMore && this.props.identity.signedIn) {
      this.setState({ draggingOver: true });
    }
  };

  handleDragOver = (e) => {
    if (this.dataTransferIsText(e.dataTransfer)) return false;

    e.preventDefault();
    e.stopPropagation();

    try {
      e.dataTransfer.dropEffect = 'copy';
    } catch {
      // do nothing
    }

    return false;
  };

  handleDrop = (e) => {
    if (this.dataTransferIsText(e.dataTransfer)) return;

    e.preventDefault();

    this.setState({ draggingOver: false });
    this.dragTargets = [];

    if (e.dataTransfer && e.dataTransfer.files.length >= 1 && this.props.canUploadMore && this.props.identity.signedIn) {
      this.props.dispatch(uploadCompose(e.dataTransfer.files));
    }
  };

  handleDragLeave = (e) => {
    e.preventDefault();
    e.stopPropagation();

    this.dragTargets = this.dragTargets.filter(el => el !== e.target && this.node.contains(el));

    if (this.dragTargets.length > 0) {
      return;
    }

    this.setState({ draggingOver: false });
  };

  dataTransferIsText = (dataTransfer) => {
    return (dataTransfer && Array.from(dataTransfer.types).filter((type) => type === 'text/plain').length === 1);
  };

  closeUploadModal = () => {
    this.setState({ draggingOver: false });
  };

  handleServiceWorkerPostMessage = ({ data }) => {
    if (data.type === 'navigate') {
      this.props.history.push(data.path);
    } else {
      console.warn('Unknown message type:', data.type);
    }
  };

  handleLayoutChange = debounce(() => {
    this.props.dispatch(clearHeight()); // The cached heights are no longer accurate, invalidate
  }, 500, {
    trailing: true,
  });

  handleResize = () => {
    const layout = layoutFromWindow();

    if (layout !== this.props.layout) {
      this.handleLayoutChange.cancel();
      this.props.dispatch(changeLayout({ layout }));
    } else {
      this.handleLayoutChange();
    }
  };

  handleDonate = () => {
    location.href = 'https://joinmastodon.org/sponsors#donate'
  }

  componentDidMount () {
    const { signedIn } = this.props.identity;

    window.addEventListener('focus', this.handleWindowFocus, false);
    window.addEventListener('blur', this.handleWindowBlur, false);
    window.addEventListener('beforeunload', this.handleBeforeUnload, false);
    window.addEventListener('resize', this.handleResize, { passive: true });

    if (!autoPlayGif) {
      window.addEventListener('mouseover', handleAnimateGif, { passive: true });
      window.addEventListener('mouseout', handleAnimateGif, { passive: true });
    }

    document.addEventListener('dragenter', this.handleDragEnter, false);
    document.addEventListener('dragover', this.handleDragOver, false);
    document.addEventListener('drop', this.handleDrop, false);
    document.addEventListener('dragleave', this.handleDragLeave, false);
    document.addEventListener('dragend', this.handleDragEnd, false);

    if ('serviceWorker' in  navigator) {
      navigator.serviceWorker.addEventListener('message', this.handleServiceWorkerPostMessage);
    }

    if (signedIn) {
      this.props.dispatch(fetchMarkers());
      this.props.dispatch(expandHomeTimeline());
      this.props.dispatch(fetchNotifications());
      this.props.dispatch(fetchServerTranslationLanguages());

      setTimeout(() => this.props.dispatch(fetchServer()), 3000);
    }
  }

  componentWillUnmount () {
    window.removeEventListener('focus', this.handleWindowFocus);
    window.removeEventListener('blur', this.handleWindowBlur);
    window.removeEventListener('beforeunload', this.handleBeforeUnload);
    window.removeEventListener('resize', this.handleResize);
    window.removeEventListener('mouseover', handleAnimateGif);
    window.removeEventListener('mouseout', handleAnimateGif);

    document.removeEventListener('dragenter', this.handleDragEnter);
    document.removeEventListener('dragover', this.handleDragOver);
    document.removeEventListener('drop', this.handleDrop);
    document.removeEventListener('dragleave', this.handleDragLeave);
    document.removeEventListener('dragend', this.handleDragEnd);
  }

  setRef = c => {
    this.node = c;
  };

  handleHotkeyNew = e => {
    e.preventDefault();

    const element = this.node.querySelector('.autosuggest-textarea__textarea');

    if (element) {
      element.focus();
    }
  };

  handleHotkeySearch = e => {
    e.preventDefault();

    const element = this.node.querySelector('.search__input');

    if (element) {
      element.focus();
    }
  };

  handleHotkeyForceNew = e => {
    this.handleHotkeyNew(e);
    this.props.dispatch(resetCompose());
  };

  handleHotkeyToggleComposeSpoilers = e => {
    e.preventDefault();
    this.props.dispatch(changeComposeSpoilerness());
  };

  handleHotkeyFocusColumn = e => {
    focusColumn({index: e.key * 1});
  };

  handleHotkeyLoadMore = () => {
    document.querySelector('.load-more')?.focus();
  };

  handleMoveUp = () => {
    const currentItemIndex = getFocusedItemIndex();
    if (currentItemIndex === -1) {
      focusColumn({
        index: 1,
        focusItem: 'first-visible',
      });
    } else {
      focusItemSibling(currentItemIndex, -1);
    }
  };

  handleMoveDown = () => {
    const currentItemIndex = getFocusedItemIndex();
    if (currentItemIndex === -1) {
      focusColumn({
        index: 1,
        focusItem: 'first-visible',
      });
    } else {
      focusItemSibling(currentItemIndex, 1);
    }
  };

  handleHotkeyBack = e => {
    e.preventDefault();

    const { history } = this.props;

    if (history.location?.state?.fromMastodon) {
      history.goBack();
    } else {
      history.push('/');
    }
  };

  handleHotkeyToggleHelp = () => {
    if (this.props.location.pathname === '/keyboard-shortcuts') {
      this.props.history.goBack();
    } else {
      this.props.history.push('/keyboard-shortcuts');
    }
  };

  handleHotkeyGoToHome = () => {
    this.props.history.push('/home');
  };

  handleHotkeyGoToNotifications = () => {
    this.props.history.push('/notifications');
  };

  handleHotkeyGoToLocal = () => {
    this.props.history.push('/public/local');
  };

  handleHotkeyGoToFederated = () => {
    this.props.history.push('/public');
  };

  handleHotkeyGoToDirect = () => {
    this.props.history.push('/conversations');
  };

  handleHotkeyGoToStart = () => {
    this.props.history.push('/getting-started');
  };

  handleHotkeyGoToFavourites = () => {
    this.props.history.push('/favourites');
  };

  handleHotkeyGoToPinned = () => {
    this.props.history.push('/pinned');
  };

  handleHotkeyGoToProfile = () => {
    this.props.history.push(`/@${this.props.username}`);
  };

  handleHotkeyGoToBlocked = () => {
    this.props.history.push('/blocks');
  };

  handleHotkeyGoToMuted = () => {
    this.props.history.push('/mutes');
  };

  handleHotkeyGoToRequests = () => {
    this.props.history.push('/follow_requests');
  };

  render () {
    const { draggingOver } = this.state;
    const { children, isComposing, location, layout, firstLaunch, newAccount } = this.props;

    const handlers = {
      help: this.handleHotkeyToggleHelp,
      new: this.handleHotkeyNew,
      search: this.handleHotkeySearch,
      forceNew: this.handleHotkeyForceNew,
      toggleComposeSpoilers: this.handleHotkeyToggleComposeSpoilers,
      focusColumn: this.handleHotkeyFocusColumn,
      focusLoadMore: this.handleHotkeyLoadMore,
      moveDown: this.handleMoveDown,
      moveUp: this.handleMoveUp,
      back: this.handleHotkeyBack,
      goToHome: this.handleHotkeyGoToHome,
      goToNotifications: this.handleHotkeyGoToNotifications,
      goToLocal: this.handleHotkeyGoToLocal,
      goToFederated: this.handleHotkeyGoToFederated,
      goToDirect: this.handleHotkeyGoToDirect,
      goToStart: this.handleHotkeyGoToStart,
      goToFavourites: this.handleHotkeyGoToFavourites,
      goToPinned: this.handleHotkeyGoToPinned,
      goToProfile: this.handleHotkeyGoToProfile,
      goToBlocked: this.handleHotkeyGoToBlocked,
      goToMuted: this.handleHotkeyGoToMuted,
      goToRequests: this.handleHotkeyGoToRequests,
      cheat: this.handleDonate,
    };

    return (
      <Hotkeys global handlers={handlers}>
        <div className={classNames('ui', { 'is-composing': isComposing })} ref={this.setRef}>
          <SwitchingColumnsArea identity={this.props.identity} location={location} singleColumn={layout === 'mobile' || layout === 'single-column'} forceOnboarding={firstLaunch && newAccount}>
            {children}
          </SwitchingColumnsArea>

          <NavigationBar />
          {layout !== 'mobile' && <PictureInPicture />}
          <AlertsController />
          {!disableHoverCards && <HoverCardController />}
          <HashtagMenuController />
          <LoadingBarContainer className='loading-bar' />
          <ModalContainer />
          <UploadArea active={draggingOver} onClose={this.closeUploadModal} />
        </div>
      </Hotkeys>
    );
  }

}

export default connect(mapStateToProps)(injectIntl(withRouter(withIdentity(UI))));
