import {useBottomTabBarHeight} from '@react-navigation/bottom-tabs';
import {StackNavigationProp} from '@react-navigation/stack';
import React, {useContext} from 'react';
import {Image, StyleSheet, Text, View} from 'react-native';
import {SafeAreaView} from 'react-native-safe-area-context';
import {useStore} from 'react-redux';
import {
  Channel,
  Chat,
  MessageInput,
  MessageList,
  OverlayProvider,
  useMessageContext,
} from 'stream-chat-react-native';
import {ChatContext} from '../../App';
import ChatHeader from '../../components/messages/ChatHeader';
import {TAGG_LIGHT_BLUE} from '../../constants';
import {MainStackParams} from '../../routes';
import {RootState} from '../../store/rootReducer';
import {ScreenType} from '../../types';
import {isIPhoneX, SCREEN_WIDTH} from '../../utils';

type ChatScreenNavigationProp = StackNavigationProp<MainStackParams, 'Chat'>;
interface ChatScreenProps {
  navigation: ChatScreenNavigationProp;
}
/*
 * Screen that displays all of the user's active conversations.
 */
const ChatScreen: React.FC<ChatScreenProps> = () => {
  const {channel, chatClient} = useContext(ChatContext);
  const state: RootState = useStore().getState();
  const loggedInUserId = state.user.user.userId;
  const tabbarHeight = useBottomTabBarHeight();

  const chatTheme = {
    messageList: {
      container: {
        backgroundColor: 'white',
      },
    },
  };

  const isOwnMessage = (message) => {
    if (message.user.id === loggedInUserId) {
      return true;
    } else {
      return false;
    }
  };

  const OwnMessageBubble = ({message}) => (
    <View style={[styles.mainBubbleContainer, styles.mainOwnBubbleContainer]}>
      <View style={styles.ownBubbleContainer}>
        <View style={styles.ownBubble}>
          <Text style={styles.messageText}>{message.text}</Text>
        </View>
      </View>
      {/* TODO: Timestamp */}
    </View>
  );

  const UserXMessageBubble = ({message}) => (
    <View style={[styles.mainBubbleContainer, styles.mainUserXBubbleContainer]}>
      <Image
        style={styles.avatar}
        source={
          message.user.thumbnail_url
            ? {uri: message.user.thumbnail_url}
            : require('../../assets/images/avatar-placeholder.png')
        }
      />
      <View style={styles.userXBubble}>
        <Text style={styles.messageText}>{message.text}</Text>
      </View>
      {/* TODO: Timestamp */}
    </View>
  );

  const CustomMessageUIComponent = () => {
    const {message} = useMessageContext();
    if (isOwnMessage(message)) {
      return <OwnMessageBubble message={message} />;
    } else {
      return <UserXMessageBubble message={message} />;
    }
  };

  return (
    <SafeAreaView
      style={[
        styles.container,
        // unable to figure out the padding issue, a hacky solution
        {paddingBottom: isIPhoneX() ? tabbarHeight + 20 : tabbarHeight + 50},
      ]}>
      <ChatHeader screenType={ScreenType.Chat} />
      <Chat client={chatClient} style={chatTheme}>
        <OverlayProvider topInset={0} bottomInset={0}>
          <Channel
            channel={channel}
            keyboardVerticalOffset={0}
            OverlayReactionList={() => null}
            MessageSimple={CustomMessageUIComponent}
            messageActions={({copyMessage, deleteMessage}) => [
              copyMessage,
              deleteMessage,
            ]}>
            <MessageList onThreadSelect={() => {}} />
            <MessageInput />
          </Channel>
        </OverlayProvider>
      </Chat>
    </SafeAreaView>
  );
};

const styles = StyleSheet.create({
  container: {
    backgroundColor: 'white',
    flex: 1,
  },

  submitButton: {
    height: 35,
    width: 35,
    backgroundColor: TAGG_LIGHT_BLUE,
    borderRadius: 999,
    justifyContent: 'center',
    alignItems: 'center',
    bottom: -5,
    alignSelf: 'flex-end',
  },
  messageText: {
    width: 196,
    paddingHorizontal: 23,
    paddingTop: 7.35,
    paddingBottom: 12,
  },
  mainBubbleContainer: {
    marginVertical: 1,
    width: SCREEN_WIDTH,
    flexDirection: 'row',
  },
  mainOwnBubbleContainer: {
    justifyContent: 'flex-end', // Different
    marginTop: 22,
  },
  mainUserXBubbleContainer: {
    justifyContent: 'flex-start',
  },
  avatar: {
    width: 40,
    height: 40,
    borderRadius: 20,
    right: -19,
    zIndex: 1,
    position: 'absolute',
    top: 0,
    left: 0,
  },
  ownBubbleContainer: {width: 241, marginBottom: 9},
  ownBubble: {
    maxWidth: 270,
    backgroundColor: '#DEE6F4',
    borderColor: '#DEE6F4',
    borderWidth: 1,
    borderRadius: 10,
    alignSelf: 'center',
  },
  userXBubble: {
    maxWidth: 235,
    backgroundColor: '#E4F0F2',
    borderColor: '#E4F0F2',
    borderWidth: 1,
    borderRadius: 10,
    zIndex: 0,
    alignSelf: 'flex-end',
    marginLeft: 25,
    marginTop: 14,
  },
});

export default ChatScreen;
