import PropTypes from "prop-types";

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

import { Helmet } from "react-helmet";

import { List as ImmutableList } from "immutable";
import ImmutablePropTypes from "react-immutable-proptypes";
import ImmutablePureComponent from "react-immutable-pure-component";
import { connect } from "react-redux";

import { fetchFollowRequests } from "mastodon/actions/accounts";
import Column from "mastodon/components/column";
import ColumnHeader from "mastodon/components/column_header";
import LinkFooter from "mastodon/features/ui/components/link_footer";

import { me, showTrends } from "../../initial_state";
import NavigationContainer from "../compose/containers/navigation_container";
import ColumnLink from "../ui/components/column_link";
import ColumnSubheading from "../ui/components/column_subheading";

import TrendsContainer from "./containers/trends_container";

const messages = defineMessages({
  home_timeline: { id: "tabs_bar.home", defaultMessage: "Home" },
  notifications: { id: "tabs_bar.notifications", defaultMessage: "Notifications" },
  public_timeline: { id: "navigation_bar.public_timeline", defaultMessage: "Federated timeline" },
  settings_subheading: { id: "column_subheading.settings", defaultMessage: "Settings" },
  community_timeline: { id: "navigation_bar.community_timeline", defaultMessage: "Local timeline" },
  explore: { id: "navigation_bar.explore", defaultMessage: "Explore" },
  direct: { id: "navigation_bar.direct", defaultMessage: "Private mentions" },
  bookmarks: { id: "navigation_bar.bookmarks", defaultMessage: "Bookmarks" },
  preferences: { id: "navigation_bar.preferences", defaultMessage: "Preferences" },
  follow_requests: { id: "navigation_bar.follow_requests", defaultMessage: "Follow requests" },
  favourites: { id: "navigation_bar.favourites", defaultMessage: "Favorites" },
  blocks: { id: "navigation_bar.blocks", defaultMessage: "Blocked users" },
  domain_blocks: { id: "navigation_bar.domain_blocks", defaultMessage: "Blocked domains" },
  mutes: { id: "navigation_bar.mutes", defaultMessage: "Muted users" },
  pins: { id: "navigation_bar.pins", defaultMessage: "Pinned posts" },
  lists: { id: "navigation_bar.lists", defaultMessage: "Lists" },
  discover: { id: "navigation_bar.discover", defaultMessage: "Discover" },
  personal: { id: "navigation_bar.personal", defaultMessage: "Personal" },
  security: { id: "navigation_bar.security", defaultMessage: "Security" },
  menu: { id: "getting_started.heading", defaultMessage: "Getting started" },
});

const mapStateToProps = state => ({
  myAccount: state.getIn(["accounts", me]),
  unreadFollowRequests: state.getIn(["user_lists", "follow_requests", "items"], ImmutableList()).size,
});

const mapDispatchToProps = dispatch => ({
  fetchFollowRequests: () => dispatch(fetchFollowRequests()),
});

const badgeDisplay = (number, limit) => {
  if (number === 0) {
    return undefined;
  } else if (limit && number >= limit) {
    return `${limit}+`;
  } else {
    return number;
  }
};

class GettingStarted extends ImmutablePureComponent {

  static contextTypes = {
    router: PropTypes.object.isRequired,
    identity: PropTypes.object,
  };

  static propTypes = {
    intl: PropTypes.object.isRequired,
    myAccount: ImmutablePropTypes.map,
    multiColumn: PropTypes.bool,
    fetchFollowRequests: PropTypes.func.isRequired,
    unreadFollowRequests: PropTypes.number,
    unreadNotifications: PropTypes.number,
  };

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

    if (!signedIn) {
      return;
    }

    fetchFollowRequests();
  }

  render () {
    const { intl, myAccount, multiColumn, unreadFollowRequests } = this.props;
    const { signedIn } = this.context.identity;

    const navItems = [];

    navItems.push(
      <ColumnSubheading key='header-discover' text={intl.formatMessage(messages.discover)} />,
    );

    if (showTrends) {
      navItems.push(
        <ColumnLink key='explore' icon='hashtag' text={intl.formatMessage(messages.explore)} to='/explore' />,
      );
    }

    navItems.push(
      <ColumnLink key='community_timeline' icon='users' text={intl.formatMessage(messages.community_timeline)} to='/public/local' />,
      <ColumnLink key='public_timeline' icon='globe' text={intl.formatMessage(messages.public_timeline)} to='/public' />,
    );

    if (signedIn) {
      navItems.push(
        <ColumnSubheading key='header-personal' text={intl.formatMessage(messages.personal)} />,
        <ColumnLink key='home' icon='home' text={intl.formatMessage(messages.home_timeline)} to='/home' />,
        <ColumnLink key='direct' icon='at' text={intl.formatMessage(messages.direct)} to='/conversations' />,
        <ColumnLink key='bookmark' icon='bookmark' text={intl.formatMessage(messages.bookmarks)} to='/bookmarks' />,
        <ColumnLink key='favourites' icon='star' text={intl.formatMessage(messages.favourites)} to='/favourites' />,
        <ColumnLink key='lists' icon='list-ul' text={intl.formatMessage(messages.lists)} to='/lists' />,
      );

      if (myAccount.get("locked") || unreadFollowRequests > 0) {
        navItems.push(<ColumnLink key='follow_requests' icon='user-plus' text={intl.formatMessage(messages.follow_requests)} badge={badgeDisplay(unreadFollowRequests, 40)} to='/follow_requests' />);
      }

      navItems.push(
        <ColumnSubheading key='header-settings' text={intl.formatMessage(messages.settings_subheading)} />,
        <ColumnLink key='preferences' icon='gears' text={intl.formatMessage(messages.preferences)} href='/settings/preferences' />,
      );
    }

    return (
      <Column>
        {(signedIn && !multiColumn) ? <NavigationContainer /> : <ColumnHeader title={intl.formatMessage(messages.menu)} icon='bars' multiColumn={multiColumn} />}

        <div className='getting-started scrollable scrollable--flex'>
          <div className='getting-started__wrapper'>
            {navItems}
          </div>

          {!multiColumn && <div className='flex-spacer' />}

          <LinkFooter multiColumn />
        </div>

        {(multiColumn && showTrends) && <TrendsContainer />}

        <Helmet>
          <title>{intl.formatMessage(messages.menu)}</title>
          <meta name='robots' content='noindex' />
        </Helmet>
      </Column>
    );
  }

}

export default connect(mapStateToProps, mapDispatchToProps)(injectIntl(GettingStarted));