import React, { FC, useCallback, useEffect, useState } from 'react';
import { View, Text, Image, TouchableOpacity, Platform } from 'react-native';
import ImageView from 'better-react-native-image-viewing';
import { styles } from '../RegionViewScreen/styles';
import { Button, HorizontalTabView, Loading, Modal as ReactModal } from 'src/components';
import { CommonActions, useFocusEffect } from '@react-navigation/native';
import { Colors } from 'src/theme';
import { ScrollView } from 'react-native-gesture-handler';

import { styles as ButtonStyles } from 'src/components/RegionPopup/style';
import { usePostSetToggleItem } from '@api/series';
import { NAVIGATION_PAGES } from 'src/types';
import { API_HOST } from 'src/constants';
import { StoreType, storage } from 'src/storage';
import { ButtonVariants } from 'src/types/components';
import { useRegion } from 'src/contexts/RegionContext';
import formatNumber from '../../TravelsScreen/utils/formatNumber';
import { PhotosData, Props, SeriesData, SeriesGroup, SeriesItem } from '../RegionViewScreen/types';
import ImageCarousel from '../RegionViewScreen/ImageCarousel';
import TravelSeriesList from '../RegionViewScreen/TravelSeriesList';
import { useGetCountryDataQuery } from '@api/countries';
import EditModal from '../../TravelsScreen/Components/EditSlowModal';

import MarkIcon from 'assets/icons/mark.svg';
import ChevronLeft from 'assets/icons/chevron-left.svg';
import CaseSvg from 'assets/icons/briefcase.svg';
import HouseSvg from 'assets/icons/house.svg';
import EditSvg from 'assets/icons/travels-screens/pen-to-square.svg';
import CheckSvg from 'assets/icons/travels-screens/circle-check.svg';
import CheckRegularSvg from 'assets/icons/travels-screens/circle-check-regular.svg';
import MapSvg from 'assets/icons/travels-screens/map-location.svg';

const CountryViewScreen: FC<Props> = ({ navigation, route }) => {
  const countryId = route.params?.regionId;
  const disabled = route.params?.disabled;
  const token = storage.get('token', StoreType.STRING) as string;
  const [isLoading, setIsLoading] = useState(true);
  const [isModalVisible, setModalVisible] = useState(false);
  const [currentImageIndex, setCurrentImageIndex] = useState(0);
  const [activeIndex, setActiveIndex] = useState(0);
  const [indexSeries, setIndexSeries] = useState(0);
  const [routes, setRoutes] = useState<SeriesGroup[]>([]);
  const [series, setSeries] = useState<SeriesData[]>([]);
  const [photos, setPhotos] = useState<PhotosData[]>([]);
  const [name, setName] = useState('');
  const { data } = useGetCountryDataQuery(countryId, true, token && token);
  const { mutate: updateSeriesItem } = usePostSetToggleItem();
  const [isInfoModalVisible, setIsInfoModalVisible] = useState<boolean>(false);
  const [infoItem, setInfoItem] = useState<SeriesItem | null>(null);
  const [isEditSlowModalVisible, setIsEditSlowModalVisible] = useState<boolean>(false);

  const {
    handleUpdateSlow: updateSlow,
    userData: regionData,
    setUserData: setRegionData,
    handleUpdateSlowList
  } = useRegion();

  useEffect(() => {
    navigation.getParent()?.setOptions({
      tabBarStyle: {
        display: 'flex',
        ...Platform.select({
          android: {
            height: 58
          }
        })
      }
    });
  }, [navigation]);

  useFocusEffect(
    useCallback(() => {
      const fetchGroups = async () => {
        let staticGroups = [];
        const routesData = data?.data?.series?.map((item) => ({
          key: item.series_id?.toString(),
          title: item.series_name,
          series_id: item.series_id,
          icon: item.icon,
          items: item.items
        }));

        routesData && staticGroups.push(...routesData);

        setPhotos(
          data?.data?.photos?.map((item) => ({
            ...item,
            uriSmall: `${API_HOST}/ajax/pic/${item.id}/small`,
            uri: `${API_HOST}/ajax/pic/${item.id}/full`
          })) ?? []
        );

        setName(data?.data.name ?? '');

        setSeries(data?.data?.series || []);
        setRoutes(staticGroups);
        if (regionData?.id !== countryId) {
          setRegionData(data?.data || {});
        }
        setIsLoading(false);
      };

      if (data && data.result === 'OK') {
        fetchGroups();
      }
    }, [data])
  );

  const handleCheckboxChange = useCallback(
    async (item: SeriesItem, double: boolean, seriesId: number) => {
      setSeries((currentData) => {
        const groupIndex = currentData.findIndex((group) => group?.series_id === seriesId);

        if (groupIndex === -1) return currentData;

        const newData = [...currentData];
        const newGroup = { ...newData[groupIndex] };

        newGroup.items = newGroup.items.map((subItem) =>
          subItem.id === item.id
            ? {
                ...subItem,
                ...(double
                  ? { visited_double: subItem.visited_double === 0 ? 1 : 0 }
                  : { visited: subItem.visited === 0 ? 1 : 0 })
              }
            : subItem
        );

        newData[groupIndex] = newGroup;
        return newData;
      });

      const itemData = {
        token: token,
        series_id: seriesId,
        item_id: item.id,
        checked: (item.visited === 1 ? 0 : 1) as 0 | 1,
        double: (double && !item.visited_double ? 1 : 0) as 0 | 1
      };

      try {
        updateSeriesItem(itemData);
      } catch (error) {
        console.error('Failed to update checkbox state', error);
      }
    },
    [token, updateSeriesItem]
  );

  const openModal = (index: number) => {
    setCurrentImageIndex(index);
    setModalVisible(true);
  };

  if (isLoading) return <Loading />;

  const handleUpdateSlowModal = (
    id: number,
    v: boolean,
    s11: boolean,
    s31: boolean,
    s101: boolean
  ) => {
    const updatedSlow = {
      ...regionData,
      visited: v,
      slow11: Number(s11) as 0 | 1,
      slow31: Number(s31) as 0 | 1,
      slow101: Number(s101) as 0 | 1
    };

    const updatedSlowData = {
      token,
      id,
      v,
      s11,
      s31,
      s101
    };

    route.params?.isTravelsScreen
      ? handleUpdateSlowList(id, v, s11, s31, s101)
      : updateSlow(id, v, s11, s31, s101);
    updatedSlow && setRegionData(updatedSlow);
  };

  const handleUpdateSlow = () => {
    route.params?.isTravelsScreen
      ? handleUpdateSlowList(
          countryId,
          !regionData.visited,
          Boolean(regionData.slow11),
          Boolean(regionData.slow31),
          Boolean(regionData.slow101)
        )
      : updateSlow(
          countryId,
          !regionData.visited,
          Boolean(regionData.slow11),
          Boolean(regionData.slow31),
          Boolean(regionData.slow101)
        );

    setRegionData({
      ...regionData,
      visited: !regionData.visited
    });
  };

  const renderDurationIcon = (condition: 0 | 1) =>
    condition ? <CheckSvg fill={Colors.DARK_BLUE} /> : <CheckRegularSvg />;

  return (
    <View style={styles.container}>
      <TouchableOpacity
        onPress={() => {
          navigation.goBack();
        }}
        style={styles.backButton}
      >
        <View style={styles.chevronWrapper}>
          <ChevronLeft fill={Colors.WHITE} />
        </View>
      </TouchableOpacity>

      <ScrollView
        contentContainerStyle={{ flexGrow: 1 }}
        nestedScrollEnabled={true}
        showsVerticalScrollIndicator={false}
      >
        {photos.length > 0 ? (
          <ImageCarousel
            photos={photos}
            activeIndex={activeIndex}
            setActiveIndex={setActiveIndex}
            openModal={openModal}
          />
        ) : (
          <View style={styles.emptyImage}>
            <Image
              source={require('../../../../../assets/images/logo-opacity.png')}
              style={{ width: 100, height: 100 }}
            />
            <Text style={styles.emptyImageText}>No image available at this location</Text>
          </View>
        )}
        <TouchableOpacity
          onPress={() => {
            route.params?.isTravelsScreen || route.params?.isProfileScreen
              ? navigation.dispatch(
                  CommonActions.reset({
                    index: 1,
                    routes: [
                      {
                        name: NAVIGATION_PAGES.IN_APP_MAP_TAB,
                        state: {
                          routes: [
                            {
                              name: NAVIGATION_PAGES.MAP_TAB,
                              params: { id: countryId, type: 'countries' }
                            }
                          ]
                        }
                      }
                    ]
                  })
                )
              : navigation.goBack();
          }}
          style={styles.goToMapBtn}
        >
          <View style={styles.chevronWrapper}>
            <MapSvg fill={Colors.WHITE} />
          </View>
        </TouchableOpacity>

        <View style={styles.wrapper}>
          {regionData?.visited && !disabled && (
            <View style={styles.durationContainer}>
              <View style={styles.durationItem}>
                {renderDurationIcon(regionData.slow11)}
                <Text style={styles.visitDuration}>11+ days</Text>
              </View>
              <View style={styles.durationItem}>
                {renderDurationIcon(regionData.slow31)}
                <Text style={styles.visitDuration}>31+ days</Text>
              </View>
              <View style={styles.durationItem}>
                {renderDurationIcon(regionData.slow101)}
                <Text style={styles.visitDuration}>101+ days</Text>
              </View>
            </View>
          )}
          <View style={styles.nameContainer}>
            <Text style={styles.title}>{name}</Text>
            <View style={ButtonStyles.btnContainer}>
              {regionData?.visited && !disabled ? (
                <TouchableOpacity
                  onPress={() => setIsEditSlowModalVisible(true)}
                  style={ButtonStyles.editBtn}
                >
                  <EditSvg width={14} height={14} />
                </TouchableOpacity>
              ) : null}
              {!disabled ? (
                <TouchableOpacity
                  style={[
                    ButtonStyles.btn,
                    regionData?.visited && !disabled
                      ? ButtonStyles.visitedButton
                      : ButtonStyles.markVisitedButton
                  ]}
                  onPress={handleUpdateSlow}
                >
                  {regionData?.visited ? (
                    <View style={ButtonStyles.visitedContainer}>
                      <MarkIcon width={16} height={16} />
                      <Text style={ButtonStyles.visitedButtonText}>Visited</Text>
                    </View>
                  ) : (
                    <Text style={[ButtonStyles.markVisitedButtonText]}>Mark Visited</Text>
                  )}
                </TouchableOpacity>
              ) : null}
            </View>
          </View>

          <View style={styles.divider} />

          <View style={styles.stats}>
            {data?.data.users_from_country_count ?? 0 > 0 ? (
              <TouchableOpacity
                style={[styles.statItem, { justifyContent: 'flex-start' }]}
                onPress={() =>
                  navigation.navigate(
                    ...([
                      NAVIGATION_PAGES.USERS_LIST,
                      {
                        id: countryId,
                        isFromHere: true,
                        type: 'country'
                      }
                    ] as never)
                  )
                }
              >
                <View style={styles.icon}>
                  <HouseSvg />
                </View>
                <View
                  style={{
                    height: 12,
                    width: 1,
                    backgroundColor: Colors.DARK_BLUE,
                    marginRight: 6
                  }}
                />
                <View style={styles.userImageContainer}>
                  {data?.data.users_from_country &&
                    data?.data.users_from_country.length > 0 &&
                    data?.data.users_from_country?.map((user, index: number) => (
                      <Image
                        key={index}
                        source={{ uri: API_HOST + user }}
                        style={styles.userImage}
                      />
                    ))}
                  <View style={styles.userCountContainer}>
                    <Text style={styles.userCount}>
                      {formatNumber(data?.data?.users_from_country_count ?? 0)}
                    </Text>
                  </View>
                </View>
              </TouchableOpacity>
            ) : (
              <View style={[styles.statItem, { justifyContent: 'flex-start' }]} />
            )}

            {data?.data.users_who_visited_country_count ?? 0 > 0 ? (
              <TouchableOpacity
                style={[styles.statItem, { justifyContent: 'flex-end' }]}
                onPress={() =>
                  navigation.navigate(
                    ...([
                      NAVIGATION_PAGES.USERS_LIST,
                      {
                        id: countryId,
                        isFromHere: false,
                        type: 'country'
                      }
                    ] as never)
                  )
                }
              >
                <View style={styles.icon}>
                  <CaseSvg />
                </View>
                <View
                  style={{
                    height: 12,
                    width: 1,
                    backgroundColor: Colors.DARK_BLUE,
                    marginRight: 6
                  }}
                />

                <View style={styles.userImageContainer}>
                  {data?.data.users_who_visited_country &&
                    data?.data.users_who_visited_country.length > 0 &&
                    data?.data.users_who_visited_country?.map((user, index) => (
                      <Image
                        key={index}
                        source={{ uri: API_HOST + user }}
                        style={[styles.userImage]}
                      />
                    ))}
                  <View style={styles.userCountContainer}>
                    <Text style={styles.userCount}>
                      {formatNumber(data?.data.users_who_visited_country_count ?? 0)}
                    </Text>
                  </View>
                </View>
              </TouchableOpacity>
            ) : (
              <View style={[styles.statItem, { justifyContent: 'flex-end' }]} />
            )}
          </View>

          <View style={[styles.divider, { marginBottom: 8 }]} />

          {series.length > 0 ? (
            <>
              <Text style={styles.travelSeriesTitle}>TRAVEL SERIES</Text>
              <HorizontalTabView
                index={indexSeries}
                setIndex={setIndexSeries}
                routes={routes}
                renderScene={({ route }: { route: SeriesGroup }) => <View style={{ height: 0 }} />}
              />
              <TravelSeriesList
                series={series}
                indexSeries={indexSeries}
                routes={routes}
                handleCheckboxChange={handleCheckboxChange}
                setIsInfoModalVisible={setIsInfoModalVisible}
                setInfoItem={setInfoItem}
                disabled={disabled}
                includeAll={false}
              />
            </>
          ) : null}
        </View>

        <ImageView
          images={photos}
          imageIndex={currentImageIndex}
          visible={isModalVisible}
          onRequestClose={() => setModalVisible(false)}
          backgroundColor={Colors.DARK_BLUE}
          onImageIndexChange={setActiveIndex}
          FooterComponent={({ imageIndex }) => (
            <View style={styles.imageFooter}>
              <Text style={styles.imageDescription}>{photos[imageIndex].title}</Text>
              <TouchableOpacity
                onPress={() => {
                  setModalVisible(false);
                  navigation.navigate(
                    ...([
                      NAVIGATION_PAGES.PUBLIC_PROFILE_VIEW,
                      { userId: photos[imageIndex].user_id, hideTabBar: true }
                    ] as never)
                  );
                }}
                disabled={disabled}
                style={styles.imageOwner}
              >
                <Text style={styles.imageOwnerText}>{photos[imageIndex].first_name}</Text>
                <Text style={styles.imageOwnerText}>{photos[imageIndex].last_name}</Text>
              </TouchableOpacity>
            </View>
          )}
        />

        <ReactModal
          visible={isInfoModalVisible}
          children={
            <View style={styles.modalView}>
              <Text style={styles.infoTitle}>{infoItem?.name}</Text>
              <Text style={styles.infoText}>{infoItem?.description}</Text>
              <Button
                variant={ButtonVariants.OPACITY}
                containerStyles={styles.btnContainer}
                textStyles={{
                  color: Colors.DARK_BLUE
                }}
                onPress={() => setIsInfoModalVisible(false)}
                children={'Got it'}
              />
            </View>
          }
          onRequestClose={() => setIsInfoModalVisible(false)}
          headerTitle={'Info'}
          visibleInPercent={'auto'}
        />
      </ScrollView>
      <EditModal
        isVisible={isEditSlowModalVisible}
        onClose={() => setIsEditSlowModalVisible(false)}
        item={{ ...regionData, country_id: countryId }}
        updateSlow={(id, v, s11, s31, s101) => {
          handleUpdateSlowModal(id, v, s11, s31, s101);
        }}
      />
    </View>
  );
};

export default CountryViewScreen;