import 'whatwg-fetch';
import React from 'react';
import PropTypes from 'prop-types';
import * as qs from 'query-string';

import Message from './Message';
import Spinner from './Spinner';

export default class Discover extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      msgs: []
    };
    this.loadMessages = this.loadMessages.bind(this);
  }
  componentDidMount() {
    this.loadMessages();
  }
  componentWillReceiveProps(nextProps) {
    if (this.props.location.search != nextProps.location.search 
      || this.props.visitor != nextProps.visitor) {
      this.loadMessages(nextProps.location.search)
    }
  }
  loadMessages(filter = '') {
    this.setState({ msgs: [] })
    let params = qs.parse(filter) || {}
    let url = 'https://api.juick.com/messages';
    if (this.props.visitor && this.props.visitor.hash) {
      params.hash = this.props.visitor.hash;
    }
    if (Object.keys(params).length > 0) {
      url = `${url}?${qs.stringify(params)}`;
    }
    fetch(url)
      .then(response => {
        return response.json()
      })
      .then(data =>
        this.setState({ msgs: data })
      ).catch(ex => {
        console.log(ex);
      });
  }

  render() {
    var nodes = this.state.msgs.map(msg => {
      return (<Message key={msg.mid} data={msg} />);
    });
    return this.state.msgs.length > 0 ? (
      <div className="msgs" id="content">{nodes}</div>
    ) : <Spinner />;
  }
}

Discover.propTypes = {
  msgs: PropTypes.array
};