// @flow
import React, { Component } from 'react';
import { observable } from 'mobx';
import { observer, inject } from 'mobx-react';
import styled from 'styled-components';

import DocumentsStore from 'stores/DocumentsStore';
import Flex from 'shared/components/Flex';
import DocumentList from 'components/DocumentList';
import PageTitle from 'components/PageTitle';
import CenteredContent from 'components/CenteredContent';
import { ListPlaceholder } from 'components/LoadingPlaceholder';

const Subheading = styled.h3`
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  color: #9fa6ab;
  letter-spacing: 0.04em;
  border-bottom: 1px solid #ddd;
  padding-bottom: 10px;
  margin-top: 30px;
`;

type Props = {
  documents: DocumentsStore,
};

@observer
class Dashboard extends Component {
  props: Props;
  @observable isLoaded: boolean = false;

  componentDidMount() {
    this.loadContent();
  }

  loadContent = async () => {
    await Promise.all([
      this.props.documents.fetchRecentlyModified({ limit: 5 }),
      this.props.documents.fetchRecentlyViewed({ limit: 5 }),
    ]);
    this.isLoaded = true;
  };

  render() {
    const { documents } = this.props;
    const recentlyViewedLoaded = documents.recentlyViewed.length > 0;
    const recentlyEditedLoaded = documents.recentlyEdited.length > 0;
    const showContent =
      this.isLoaded || (recentlyViewedLoaded && recentlyEditedLoaded);

    return (
      <CenteredContent>
        <PageTitle title="Home" />
        <h1>Home</h1>
        {showContent ? (
          <Flex column>
            {recentlyViewedLoaded && (
              <Flex column>
                <Subheading>Recently viewed</Subheading>
                <DocumentList documents={documents.recentlyViewed} />
              </Flex>
            )}
            {recentlyEditedLoaded && (
              <Flex column>
                <Subheading>Recently edited</Subheading>
                <DocumentList documents={documents.recentlyEdited} />
              </Flex>
            )}
          </Flex>
        ) : (
          <ListPlaceholder count={5} />
        )}
      </CenteredContent>
    );
  }
}

export default inject('documents')(Dashboard);