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 (7, 31, 101) days, this will increase your SLOW score, each longer stay should include at least 7 days countinuous stay in a country.`}
      />
    </PageWrapper>
  );
};

export default CountriesScreen;