import React, { useCallback, useEffect, useRef, useState } from 'react';
import {
  View,
  Text,
  Image,
  TouchableOpacity,
  ScrollView,
  LayoutAnimation,
  findNodeHandle
} from 'react-native';
import { FlashList } from '@shopify/flash-list';
import { CommonActions, useFocusEffect, useNavigation } from '@react-navigation/native';
import { styles } from './styles';

import { NAVIGATION_PAGES } from 'src/types';
import { StoreType, storage } from 'src/storage';

import { Header, Input, PageWrapper } from 'src/components';
import { Colors } from 'src/theme';

import SearchIcon from 'assets/icons/search.svg';
import CalendarIcon from 'assets/icons/events/calendar-solid.svg';
import EarthIcon from 'assets/icons/travels-section/earth.svg';
import NomadsIcon from 'assets/icons/bottom-navigation/travellers.svg';
import CalendarPlusIcon from 'assets/icons/events/calendar-plus.svg';
import ShoppingCartIcon from 'assets/icons/events/shopping-cart.svg';
import { SingleEvent, useGetCanAddEventQuery, useGetEventsListQuery } from '@api/events';
import moment from 'moment';
import { API_HOST } from 'src/constants';
import { Grayscale } from 'react-native-color-matrix-image-filters';
import { renderSpotsText } from './utils';
import ChevronIcon from 'assets/icons/chevron-left.svg';

const EventsScreen = () => {
  const token = (storage.get('token', StoreType.STRING) as string) ?? null;
  const { data, refetch } = useGetEventsListQuery(token, 0, true);
  const { data: pastData } = useGetEventsListQuery(token, 1, true);
  const { data: canAddEvent } = useGetCanAddEventQuery(token, true);
  const navigation = useNavigation();
  const [searchQuery, setSearchQuery] = useState('');
  const [events, setEvents] = useState<SingleEvent[]>([]);
  const [pastEvents, setPastEvents] = useState<SingleEvent[]>([]);
  const [filteredEvents, setFilteredEvents] = useState<SingleEvent[]>([]);
  const [filteredPastEvents, setFilteredPastEvents] = useState<SingleEvent[]>([]);
  const date = new Date();

  const [isExpanded, setIsExpanded] = useState(false);
  const scrollViewRef = useRef<ScrollView>(null);
  const sectionRef = useRef<View>(null);

  const toggleExpand = () => {
    LayoutAnimation.configureNext(LayoutAnimation.Presets.easeInEaseOut, () => {
      if (!isExpanded && sectionRef.current && scrollViewRef.current) {
        sectionRef.current.measureLayout(
          findNodeHandle(scrollViewRef.current)!,
          (x, y) => {
            scrollViewRef.current?.scrollTo({ y, animated: true });
          },
          () => console.warn('events measureLayout error')
        );
      }
    });

    setIsExpanded(!isExpanded);
  };

  useEffect(() => {
    if (data && data.data) {
      setEvents(data.data);
      setFilteredEvents(data.data);
    }
  }, [data]);

  useEffect(() => {
    if (pastData && pastData.data) {
      setPastEvents(pastData.data);
      setFilteredPastEvents(pastData.data);
    }
  }, [pastData]);

  useFocusEffect(
    useCallback(() => {
      refetch();
    }, [navigation])
  );

  const handleSearch = (text: string) => {
    if (text) {
      const searchData =
        events.filter((item: any) => {
          const itemData = item.name ? item.name.toLowerCase() : ''.toLowerCase();
          const textData = text.toLowerCase();
          return itemData.indexOf(textData) > -1;
        }) ?? [];
      setFilteredEvents(searchData);

      const searchPastData =
        pastEvents.filter((item: any) => {
          const itemData = item.name ? item.name.toLowerCase() : ''.toLowerCase();
          const textData = text.toLowerCase();
          return itemData.indexOf(textData) > -1;
        }) ?? [];
      setFilteredPastEvents(searchPastData);

      setSearchQuery(text);
    } else {
      setFilteredEvents(events);
      setFilteredPastEvents(pastEvents);
      setSearchQuery(text);
    }
  };

  const formatEventDate = (event: SingleEvent) => {
    if (event.date_from && event.date_to) {
      return `${moment(event.date_from, 'YYYY-MM-DD').format('DD MMM YYYY')} - ${moment(event.date_to, 'YYYY-MM-DD').format('DD MMM YYYY')}`;
    } else {
      return moment(event.date, 'YYYY-MM-DD').format('DD MMMM YYYY');
    }
  };

  const renderEventCard = ({ item }: { item: SingleEvent }) => {
    let staticImgUrl = '/static/img/events/meeting.webp';
    let badgeColor = Colors.DARK_BLUE;
    let badgeText = '';
    if (item.full) {
      badgeColor = Colors.LIGHT_GRAY;
      badgeText = 'FULL';
    } else if (item.type === 2) {
      badgeColor = Colors.ORANGE;
      badgeText = 'TOUR';
      staticImgUrl = '/static/img/events/trip.webp';
    } else if (item.type === 3) {
      badgeColor = Colors.DARK_BLUE;
      badgeText = 'CONF';
      staticImgUrl = '/static/img/events/conference.webp';
    }

    const photo = item.photo
      ? API_HOST + '/webapi/events/get-square-photo/' + item.id + '?cacheBust=' + date
      : API_HOST + staticImgUrl;

    return (
      <Grayscale amount={item.active === 0 ? 1 : 0}>
        <TouchableOpacity
          style={[
            styles.card,
            item.type === 2 || item.type === 3 || item.full
              ? { backgroundColor: Colors.FILL_LIGHT }
              : { backgroundColor: Colors.WHITE }
          ]}
          onPress={() =>
            navigation.navigate(...([NAVIGATION_PAGES.EVENT, { url: item.url }] as never))
          }
          disabled={item.active === 0}
        >
          <View style={styles.imageWrapper}>
            <Image source={{ uri: photo }} style={styles.image} resizeMode="cover" />

            {/* {item.isPaid && (
          <View style={styles.iconOverlay}>
            <ShoppingCartIcon fill={Colors.WHITE} width={12} />
          </View>
        )} */}

            {item.joined ? (
              <View style={styles.joinedOverlay}>
                <Text style={{ color: Colors.WHITE, fontSize: 12, fontFamily: 'redhat-700' }}>
                  Joined
                </Text>
              </View>
            ) : null}
          </View>

          <View style={styles.info}>
            <Text style={styles.title} numberOfLines={2}>
              {item.name}
            </Text>

            <View style={[styles.row]}>
              <View style={styles.row}>
                <CalendarIcon fill={Colors.DARK_BLUE} height={14} width={14} />
                <Text style={[styles.dateAndLocation, { flex: 0 }]} numberOfLines={1}>
                  {formatEventDate(item)}
                </Text>
              </View>
            </View>

            <View style={styles.row}>
              <EarthIcon fill={Colors.DARK_BLUE} height={14} width={14} />
              <Text style={styles.dateAndLocation} numberOfLines={1}>
                {item.address1}
              </Text>
            </View>

            {item.registrations_info !== 1 && (
              <View style={styles.row}>
                <NomadsIcon fill={Colors.DARK_BLUE} height={14} width={14} />
                <Text style={styles.dateAndLocation} numberOfLines={1}>
                  {renderSpotsText(item)}
                </Text>
              </View>
            )}
          </View>

          {item.type !== 1 || item.full ? (
            <View
              style={[
                styles.statusBadge,
                { backgroundColor: item.active ? badgeColor : Colors.LIGHT_GRAY }
              ]}
            >
              <View style={styles.rotatedContainer}>
                <Text style={styles.statusText}>{badgeText}</Text>
              </View>
            </View>
          ) : null}
        </TouchableOpacity>
      </Grayscale>
    );
  };

  return (
    <PageWrapper>
      <Header
        label="Events"
        rightElement={
          canAddEvent?.can ? (
            <TouchableOpacity
              onPress={() => navigation.navigate(NAVIGATION_PAGES.CREATE_EVENT as never)}
              style={{ width: 30 }}
            >
              <CalendarPlusIcon fill={Colors.DARK_BLUE} />
            </TouchableOpacity>
          ) : null
        }
      />

      <ScrollView ref={scrollViewRef} nestedScrollEnabled showsVerticalScrollIndicator={false}>
        <View style={styles.searchContainer}>
          <Input
            inputMode={'search'}
            placeholder={'Search'}
            onChange={(text) => handleSearch(text)}
            value={searchQuery}
            icon={<SearchIcon fill={'#C8C8C8'} width={14} height={14} />}
            height={38}
          />
        </View>

        <FlashList
          data={filteredEvents}
          scrollEnabled={false}
          keyExtractor={(item) => item.id.toString()}
          renderItem={renderEventCard}
          estimatedItemSize={100}
          contentContainerStyle={styles.listContainer}
          showsVerticalScrollIndicator={false}
        />

        {filteredPastEvents && filteredPastEvents.length ? (
          <View ref={sectionRef} style={styles.sectionContainer}>
            <TouchableOpacity onPress={toggleExpand} style={styles.header}>
              <View style={styles.headerContainer}>
                <Text style={styles.headerText}>Past Events</Text>
              </View>

              <View style={styles.chevronContainer}>
                <ChevronIcon
                  fill={Colors.DARK_BLUE}
                  style={[styles.headerIcon, isExpanded ? styles.rotate : null]}
                />
              </View>
            </TouchableOpacity>

            {isExpanded ? (
              <FlashList
                data={filteredPastEvents}
                scrollEnabled={false}
                keyExtractor={(item) => item.id.toString()}
                renderItem={renderEventCard}
                estimatedItemSize={100}
                contentContainerStyle={styles.listContainer}
                showsVerticalScrollIndicator={false}
              />
            ) : null}
          </View>
        ) : null}
      </ScrollView>
    </PageWrapper>
  );
};

export default EventsScreen;