import React, { useCallback, useEffect, useState } from 'react';
import { View, Text, TouchableOpacity, ScrollView, FlatList, Platform } from 'react-native';
import ReactModal from 'react-native-modal';
import * as Progress from 'react-native-progress';
import { useFocusEffect, useNavigation } from '@react-navigation/native';

import CountryItem from '../Components/CountryItem';
import EditModal from '../Components/EditSlowModal';
import { Header, Input, PageWrapper, WarningModal } from 'src/components';

import { useGetSlowQuery, usePostSetSlowMutation } from '@api/countries';
import { StoreType, storage } from 'src/storage';
import { SlowData } from '../utils/types';
import { Colors } from 'src/theme';
import { styles } from './styles';

import ChevronIcon from 'assets/icons/travels-screens/down-arrow.svg';
import IngoSvg from 'assets/icons/travels-screens/info.svg';
import SearchIcon from '../../../../../assets/icons/search.svg';
import InfoIcon from 'assets/icons/info-solid.svg';
import { NAVIGATION_PAGES } from 'src/types';
import { useRegion } from 'src/contexts/RegionContext';

const CountriesScreen = () => {
  const token = storage.get('token', StoreType.STRING) as string;
  const { data, refetch } = useGetSlowQuery(String(token));
  const [megaSelectorVisible, setMegaSelectorVisible] = useState(false);
  const [selectedMega, setSelectedMega] = useState<{ name: string; id: number }>({
    name: 'ALL MEGAREGIONS',
    id: -1
  });
  const [total, setTotal] = useState({ slow: 0, visited: 0 });
  const [isEditModalVisible, setIsEditModalVisible] = useState(false);
  const [currentItem, setCurrentItem] = useState<SlowData | null>(null);
  const [infoModalVisible, setInfoModalVisible] = useState(false);
  const [search, setSearch] = useState<string>('');
  const [filteredSlow, setFilteredSlow] = useState<SlowData[] | null>(null);
  const navigation = useNavigation();
  const { handleUpdateSlowList: handleUpdateSlow, slow, setSlow, setUserData } = useRegion();

  const handleOpenEditModal = (item: SlowData) => {
    setCurrentItem(item);
    setIsEditModalVisible(true);
  };

  useEffect(() => {
    if (slow && slow.length) {
      token && calcTotalScore();
      let newSlowData = slow;

      if (search) {
        newSlowData =
          slow?.filter((item: any) => {
            const itemData = item.country ? item.country.toLowerCase() : ''.toLowerCase();
            const textData = search.toLowerCase();
            return itemData.indexOf(textData) > -1;
          }) ?? [];
      }
      setFilteredSlow(newSlowData);
    }
  }, [slow]);

  useEffect(() => {
    const refetchData = async () => {
      await refetch().then((res) => {
        if (res.data) {
          setSlow(res.data.slow);
        }
      });
    };

    if (data && data.result === 'OK') {
      setSearch('');
      if (selectedMega.id === -1) {
        refetchData();
      } else {
        setSlow(data?.slow?.filter((item) => item.mega.includes(selectedMega.id)));
      }
    }
  }, [selectedMega]);

  useEffect(() => {
    if (data && data.result === 'OK') {
      setSlow(data?.slow);
    }
  }, [data]);

  const searchFilter = (text: string) => {
    if (text) {
      const newData: SlowData[] | null =
        slow?.filter((item: any) => {
          const itemData = item.country ? item.country.toLowerCase() : ''.toLowerCase();
          const textData = text.toLowerCase();
          return itemData.indexOf(textData) > -1;
        }) ?? [];
      setFilteredSlow(newData);
      setSearch(text);
    } else {
      setFilteredSlow(slow);
      setSearch(text);
    }
  };

  const calcTotalScore = () => {
    let visited = 0;
    let slow11 = 0;
    let slow31 = 0;
    let slow101 = 0;

    slow?.forEach((item: SlowData) => {
      visited += item.visited;
      slow11 += item.slow11;
      slow31 += item.slow31;
      slow101 += item.slow101;
    });

    setTotal({ slow: slow11 + slow31 + slow101, visited });
  };

  const renderCountryItem = ({ item }: { item: SlowData }) => (
    <CountryItem
      item={item}
      updateSlow={handleUpdateSlow}
      openEditModal={handleOpenEditModal}
      token={token}
      setUserData={setUserData}
      navigation={navigation}
    />
  );

  return (
    <PageWrapper>
      <Header
        label="Countries"
        // rightElement={
        //   <TouchableOpacity
        //     onPress={() => navigation.navigate(NAVIGATION_PAGES.COUNTRIES_INFO as never)}
        //     style={{ width: 30 }}
        //   >
        //     <InfoIcon />
        //   </TouchableOpacity>
        // }
      />
      <TouchableOpacity style={styles.megaSelector} onPress={() => setMegaSelectorVisible(true)}>
        <Text style={styles.megaButtonText}>{selectedMega.name}</Text>
        <ChevronIcon width={18} height={18} />
      </TouchableOpacity>
      <View style={{ marginBottom: 16 }}>
        <Input
          inputMode={'search'}
          placeholder={'Search'}
          onChange={(text) => searchFilter(text)}
          value={search}
          icon={<SearchIcon fill={'#C8C8C8'} width={14} height={14} />}
          height={34}
        />
      </View>

      <View style={styles.progressHeader}>
        <Text style={styles.visitedCountriesCount}>Visited countries</Text>
        <Text style={styles.visitedCountriesCount}>
          {slow?.length
            ? `${total.visited}/${slow.length} • ${((total.visited * 100) / slow.length).toFixed(2)}%`
            : '0/0 • 100%'}
        </Text>
      </View>

      <Progress.Bar
        progress={slow?.length ? total.visited / slow.length : 1}
        width={null}
        height={4}
        color={Colors.DARK_BLUE}
        borderWidth={0}
        borderRadius={5}
        unfilledColor={Colors.FILL_LIGHT}
      />

      <View style={styles.slowScoreSection}>
        <Text style={styles.visitedCountriesCount}>SLOW score: {total.slow}</Text>
        <TouchableOpacity style={styles.infoBtn} onPress={() => setInfoModalVisible(true)}>
          <IngoSvg />
        </TouchableOpacity>
      </View>

      {filteredSlow && filteredSlow?.length ? (
        <FlatList
          data={filteredSlow}
          renderItem={renderCountryItem}
          keyExtractor={(item) => item.country_id.toString()}
          showsVerticalScrollIndicator={false}
          style={{ paddingTop: 8 }}
        />
      ) : null}

      <ReactModal
        isVisible={megaSelectorVisible}
        onBackdropPress={() => setMegaSelectorVisible(false)}
        style={styles.modal}
        statusBarTranslucent={true}
        presentationStyle="overFullScreen"
      >
        <View style={styles.wrapper}>
          <ScrollView style={{ paddingBottom: 16 }} showsVerticalScrollIndicator={false}>
            <TouchableOpacity
              style={styles.btnOption}
              onPress={() => {
                setMegaSelectorVisible(false);
                setSelectedMega({ name: 'ALL MEGAREGIONS', id: -1 });
              }}
            >
              <Text style={styles.btnOptionText}>ALL MEGAREGIONS</Text>
            </TouchableOpacity>
            {data?.megaregions?.map((mega) => (
              <TouchableOpacity
                key={mega.id}
                style={styles.btnOption}
                onPress={() => {
                  setMegaSelectorVisible(false);
                  setSelectedMega(mega);
                }}
              >
                <Text style={styles.btnOptionText}>{mega.name}</Text>
              </TouchableOpacity>
            ))}
          </ScrollView>
        </View>
      </ReactModal>
      {currentItem && (
        <EditModal
          isVisible={isEditModalVisible}
          onClose={() => setIsEditModalVisible(false)}
          item={currentItem}
          updateSlow={(id, v, s11, s31, s101) => handleUpdateSlow(id, v, s11, s31, s101)}
        />
      )}
      <WarningModal
        isVisible={infoModalVisible}
        onClose={() => setInfoModalVisible(false)}
        type="success"
        title="SLOW score"
        message={`Mark countries as visited.\nTell us if you stayed longer (11, 31, 101) days, this will increase your SLOW score, each longer stay should include at least 11 days countinuous stay in a country.`}
      />
    </PageWrapper>
  );
};

export default CountriesScreen;