import {RouteProp} from '@react-navigation/native';
import {StackNavigationProp} from '@react-navigation/stack';
import React, {Fragment, useEffect, useState} from 'react';
import {
  Alert,
  Image,
  Keyboard,
  KeyboardAvoidingView,
  Platform,
  StyleSheet,
  Text,
  TouchableOpacity,
  TouchableWithoutFeedback,
  View,
} from 'react-native';
import {MentionInput} from 'react-native-controlled-mentions';
import {Button, normalize} from 'react-native-elements';
import {useDispatch, useSelector} from 'react-redux';
import FrontArrow from '../../assets/icons/front-arrow.svg';
import {SearchBackground} from '../../components';
import {CaptionScreenHeader} from '../../components/';
import TaggLoadingIndicator from '../../components/common/TaggLoadingIndicator';
import {TAGG_LIGHT_BLUE_2} from '../../constants';
import {ERROR_UPLOAD, SUCCESS_PIC_UPLOAD} from '../../constants/strings';
import {MainStackParams} from '../../routes';
import {postMoment, postMomentTags} from '../../services';
import {
  loadUserMoments,
  updateProfileCompletionStage,
} from '../../store/actions';
import {RootState} from '../../store/rootReducer';
import {ProfilePreviewType} from '../../types';
import {SCREEN_WIDTH, StatusBarHeight} from '../../utils';
import {mentionPartTypes} from '../../utils/comments';

/**
 * Upload Screen to allow users to upload posts to Tagg
 */
type CaptionScreenRouteProp = RouteProp<MainStackParams, 'CaptionScreen'>;
type CaptionScreenNavigationProp = StackNavigationProp<
  MainStackParams,
  'CaptionScreen'
>;
interface CaptionScreenProps {
  route: CaptionScreenRouteProp;
  navigation: CaptionScreenNavigationProp;
}

const CaptionScreen: React.FC<CaptionScreenProps> = ({route, navigation}) => {
  const {title, image, screenType, selectedUsers} = route.params;
  const {
    user: {userId},
  } = useSelector((state: RootState) => state.user);
  const dispatch = useDispatch();
  const [caption, setCaption] = useState('');
  const [loading, setLoading] = useState(false);
  const [taggedUsers, setTaggedUsers] = useState<ProfilePreviewType[]>([]);
  const [taggedList, setTaggedList] = useState<string>('');

  useEffect(() => {
    setTaggedUsers(selectedUsers ? selectedUsers : []);
  }, [route.params]);

  useEffect(() => {
    const getTaggedUsersListString = () => {
      let listString = '';
      for (let i = 0; i < taggedUsers.length; i++) {
        if (listString.length < 21) {
          listString = listString.concat(`@${taggedUsers[i].username} `);
        } else {
          break;
        }
      }
      setTaggedList(listString);
    };
    getTaggedUsersListString();
  }, [taggedUsers]);

  const navigateToProfile = () => {
    //Since the logged In User is navigating to own profile, useXId is not required
    navigation.navigate('Profile', {
      screenType,
      userXId: undefined,
    });
  };

  const handleShare = async () => {
    const handleFailed = () => {
      setLoading(false);
      setTimeout(() => {
        Alert.alert(ERROR_UPLOAD);
      }, 500);
    };
    const handleSuccess = () => {
      setLoading(false);
      navigateToProfile();
      setTimeout(() => {
        Alert.alert(SUCCESS_PIC_UPLOAD);
      }, 500);
    };
    setLoading(true);
    if (!image.filename) {
      return;
    }
    const momentResponse = await postMoment(
      image.filename,
      image.path,
      caption,
      title,
      userId,
    );
    if (!momentResponse) {
      handleFailed();
      return;
    }
    const momentTagResponse = await postMomentTags(
      momentResponse.moment_id,
      taggedUsers.map((u, index) => ({
        x: index * 50 - 150,
        y: index * 50 - 150,
        user_id: u.id,
      })),
    );
    if (!momentTagResponse) {
      handleFailed();
      return;
    }
    dispatch(loadUserMoments(userId));
    dispatch(
      updateProfileCompletionStage(momentResponse.profile_completion_stage),
    );
    handleSuccess();
  };

  return (
    <SearchBackground>
      {loading ? <TaggLoadingIndicator fullscreen /> : <Fragment />}
      <TouchableWithoutFeedback onPress={Keyboard.dismiss}>
        <KeyboardAvoidingView
          behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
          style={styles.flex}>
          <View style={styles.contentContainer}>
            <View style={styles.buttonsContainer}>
              <Button
                title="Cancel"
                buttonStyle={styles.button}
                onPress={() => navigateToProfile()}
              />
              <Button
                title="Share"
                titleStyle={styles.shareButtonTitle}
                buttonStyle={styles.button}
                onPress={handleShare}
              />
            </View>
            <CaptionScreenHeader style={styles.header} {...{title: title}} />
            {/* this is the image we want to center our tags' initial location within */}
            <Image
              style={styles.image}
              source={{uri: image.path}}
              resizeMode={'cover'}
            />
            <MentionInput
              containerStyle={styles.text}
              placeholder="Write something....."
              placeholderTextColor="gray"
              value={caption}
              onChange={setCaption}
              partTypes={mentionPartTypes('blue')}
            />
            <TouchableOpacity
              onPress={() =>
                navigation.navigate('TagFriendsScreen', {
                  image: image,
                  screenType: screenType,
                  selectedUsers: taggedUsers,
                })
              }
              style={{
                marginHorizontal: '5%',
                marginTop: '3%',
                flexDirection: 'row',
                justifyContent: 'space-between',
                alignItems: 'center',
              }}>
              <Image
                source={require('../../assets/icons/tagging/tag-icon.png')}
                style={{width: 20, height: 20}}
              />
              <Text style={styles.tagFriendsTitle}>Tag Friends</Text>
              <Text
                numberOfLines={1}
                style={{
                  color: 'white',
                  width: 150,
                  fontSize: normalize(10),
                  lineHeight: normalize(11),
                  letterSpacing: normalize(0.3),
                  textAlign: 'right',
                }}>
                {taggedList}
                {taggedList.length > 21 ? '. . .' : ''}
              </Text>
              <FrontArrow width={12} height={12} color={'white'} />
            </TouchableOpacity>
          </View>
        </KeyboardAvoidingView>
      </TouchableWithoutFeedback>
    </SearchBackground>
  );
};
const styles = StyleSheet.create({
  contentContainer: {
    paddingTop: StatusBarHeight,
    justifyContent: 'flex-end',
  },
  buttonsContainer: {
    flexDirection: 'row',
    justifyContent: 'space-between',
    marginLeft: '5%',
    marginRight: '5%',
  },
  button: {
    backgroundColor: 'transparent',
  },
  shareButtonTitle: {
    fontWeight: 'bold',
    color: TAGG_LIGHT_BLUE_2,
  },
  header: {
    marginVertical: 20,
  },
  image: {
    position: 'relative',
    width: SCREEN_WIDTH,
    aspectRatio: 1,
    marginBottom: '3%',
  },
  text: {
    position: 'relative',
    backgroundColor: 'white',
    width: '100%',
    paddingHorizontal: '2%',
    paddingVertical: '1%',
    height: 60,
  },
  flex: {
    flex: 1,
  },
  tagFriendsTitle: {
    color: 'white',
    fontSize: normalize(12),
    lineHeight: normalize(16.71),
    letterSpacing: normalize(0.3),
    fontWeight: '600',
  },
  tagFriendsContainer: {
    flexDirection: 'row',
    marginTop: '3%',
  },
});

export default CaptionScreen;