text: import React from 'react';
  import Chatkit from '@pusher/chatkit-client';
  import styled from 'styled-components';
  import { connect } from 'react-redux';
  import MessageList from './MessageList';
  import SendMessageForm from './SendMessage';
  import UserList from './UserList';
  import { getRooms } from '../../state/actions/chatActions';
  import TypingIndicator from './TypingIndicator';
  import devices from '../../utils/devices';
  
  const StyledChatScreen = styled.div`
    height: 43.2rem;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 4rem;
  
    @media ${devices.tablet} {
      width: 95%;
      margin: 0 auto;
    }
    @media ${devices.mobile} {
      width: 90%;
      margin: 0 auto;
    }
    .whos-online-list-container {
      border: 1px solid #ced4da;
      border-bottom-left-radius: 6px;
      border-top-left-radius: 6px;
      border-right: none;
      width: 30%;
      flex: none;
      color: #2f4f4f;
      text-align: center;
      background: #f9f9f9;
      height: 100%;
      overflow: auto;
  
      .chat-title {
        border-bottom: 1px solid #ced4da;
        font-size: 1.3rem;
        padding: 1rem;
  
        @media ${devices.tablet} {
          padding: 0.7rem;
          font-size: 1.1rem;
        }
        @media ${devices.mobile} {
          padding: 0.5rem;
          font-size: 0.9rem;
        }
        @media only screen and (max-width: 450px) {
          padding: 0.3rem;
          font-size: 0.65rem;
        }
      }
    }
    .chat-list-container {
      background: #fcfcfc;
      width: 70%;
      display: flex;
      flex-direction: column;
      height: 100%;
      box-sizing: border-box;
      border: 1px solid #ced4da;
      border-bottom-right-radius: 6px;
      border-top-right-radius: 6px;
    }
  `;
  
  class ChatScreen extends React.Component {
    state = {
      currentUser: null,
      currentRoom: null,
      messages: [],
      error: null,
      usersWhoAreTyping: [],
    };
    componentDidMount = () => {
      this.props.getRooms(this.props.user.email);
      if (this.props.roomId) this.startChat(this.props.roomId);
    };
  
    startChat = roomId => {
      if (this.state.currentUser && this.state.currentRoom) {
        this.state.currentUser.roomSubscriptions[
          this.state.currentRoom.id
        ].cancel();
      }
  
      this.setState({ messages: [] });
      const chatManager = new Chatkit.ChatManager({
        instanceLocator: 'v1:us1:02d03086-c977-4990-bbb8-d915c9090f74',
        userId: this.props.user.email,
        tokenProvider: new Chatkit.TokenProvider({
          url: `${process.env.REACT_APP_BASE_URL}chat/auth`,
        }),
      });
  
      chatManager
        .connect()
        .then(currentUser => {
          this.setState({ currentUser });
          return currentUser.subscribeToRoom({
            roomId,
            messageLimit: 100,
            hooks: {
              onMessage: message => {
                this.setState({
                  messages: [...this.state.messages, message],
                });
              },
              onUserStartedTyping: user => {
                this.setState({
                  usersWhoAreTyping: [
                    ...this.state.usersWhoAreTyping,
                    user.name,
                  ],
                });
              },
              onUserStoppedTyping: user => {
                this.setState({
                  usersWhoAreTyping: this.state.usersWhoAreTyping.filter(
                    username => username !== user.name,
                  ),
                });
              },
            },
          });
        })
        .then(currentRoom => {
          this.setState({ currentRoom });
        })
        .catch(error => this.setState({ error }));
    };
  
    sendMessage = text => {
      this.state.currentUser.sendMessage({
        text,
        roomId: this.state.currentRoom.id,
      });
    };
  
    sendTypingEvent = () => {
      this.state.currentUser
        .isTypingIn({ roomId: this.state.currentRoom.id })
        .catch(error => this.setState({ error }));
    };
  
    render() {
      return (
        <StyledChatScreen className='chat-container'>
          <aside className='whos-online-list-container'>
            <div className='chat-title'>
              Select a conversation to send a message
            </div>
            <UserList
              rooms={this.props.rooms}
              user={this.props.user}
              startChat={this.startChat}
              currentRoom={this.state.currentRoom}
              currentUser={this.state.currentUser}
              isLoading={this.props.isLoading}
            />
          </aside>
          <section className='chat-list-container'>
            <MessageList
              messages={this.state.messages}
              userId={this.props.user.email}
              currentRoom={this.state.currentRoom}
              user={this.props.user}
            />
            <TypingIndicator
              usersWhoAreTyping={this.state.usersWhoAreTyping}
            />
            <SendMessageForm
              onSubmit={this.sendMessage}
              onChange={this.sendTypingEvent}
              currentRoom={this.state.currentRoom}
            />
          </section>
        </StyledChatScreen>
      );
    }
  }
  
  const mapStateToProps = state => {
    return {
      roomId: state.chatReducer.roomId,
      rooms: state.chatReducer.rooms,
      user: state.userReducer.user,
      isLoading: state.chatReducer.isLoading,
    };
  };
  
  export default connect(mapStateToProps, { getRooms })(ChatScreen);
  