// @flow
import React, { Component } from 'react';
import { observer } from 'mobx-react';
import { Link } from 'react-router-dom';
import Document from 'models/Document';
import styled from 'styled-components';
import { color } from 'shared/styles/constants';
import Highlight from 'components/Highlight';
import StarredIcon from 'components/Icon/StarredIcon';
import PublishingInfo from './components/PublishingInfo';

type Props = {
  document: Document,
  highlight?: ?string,
  showCollection?: boolean,
  innerRef?: Function,
};

const StyledStar = styled(({ solid, ...props }) => (
  <StarredIcon color={solid ? color.black : color.text} {...props} />
))`
  position: absolute;
  opacity: ${props => (props.solid ? '1 !important' : 0)};
  transition: all 100ms ease-in-out;
  margin-left: 2px;

  &:hover {
    transform: scale(1.1);
  }
  &:active {
    transform: scale(0.95);
  }
`;

const DocumentLink = styled(Link)`
  display: block;
  margin: 0 -16px;
  padding: 10px 16px;
  border-radius: 8px;
  border: 2px solid transparent;
  max-height: 50vh;
  min-width: 100%;
  overflow: hidden;

  &:hover,
  &:active,
  &:focus {
    background: ${color.smokeLight};
    border: 2px solid ${color.smoke};
    outline: none;

    ${StyledStar} {
      opacity: 0.5;

      &:hover {
        opacity: 1;
      }
    }
  }

  &:focus {
    border: 2px solid ${color.slateDark};
  }

  h3 {
    margin-top: 0;
    margin-bottom: 0.25em;
  }
`;

@observer
class DocumentPreview extends Component {
  props: Props;

  star = (ev: SyntheticEvent) => {
    ev.preventDefault();
    ev.stopPropagation();
    this.props.document.star();
  };

  unstar = (ev: SyntheticEvent) => {
    ev.preventDefault();
    ev.stopPropagation();
    this.props.document.unstar();
  };

  render() {
    const {
      document,
      showCollection,
      innerRef,
      highlight,
      ...rest
    } = this.props;

    return (
      <DocumentLink to={document.url} innerRef={innerRef} {...rest}>
        <h3>
          <Highlight text={document.title} highlight={highlight} />
          {document.starred ? (
            <span onClick={this.unstar}>
              <StyledStar solid />
            </span>
          ) : (
            <span onClick={this.star}>
              <StyledStar />
            </span>
          )}
        </h3>
        <PublishingInfo
          document={document}
          collection={showCollection ? document.collection : undefined}
        />
      </DocumentLink>
    );
  }
}

export default DocumentPreview;