import React, { useEffect } from "react";
import { Searchbar, Title } from 'react-native-paper';
import { StyleSheet, SafeAreaView, FlatList } from 'react-native';
import API from "../API";
import GroupCard from "../components/GroupCard";

const Groups = () => {
    const [searchQuery, setSearchQuery] = React.useState('');
    const [groups, setGroups] = React.useState([]);
    const [queryTimer, setQueryTimer] = React.useState(0);

    useEffect(() => {
        let subscribed = true;
        API.getFollowingGroups('').then((data) => {
            if (subscribed)
                setGroups(data?.groups || []);
        });
        return () => {
            subscribed = false;
        }
    }, [])



    const onChangeSearch = query => {
        setSearchQuery(query);
        if (queryTimer) clearTimeout(queryTimer);
        let timerId = setTimeout(() => {
            if (!query) {
                return API.getFollowingGroups('').then((data) => {
                    setGroups(data.groups || []);
                });
            }
            API.searchGroups(query).then((data) => {
                setGroups(data.groups || []);
            })

        }, 300);
        setQueryTimer(timerId);
    };
    const renderProfile = (({ item }) => {
        return (<GroupCard profileObj={item} />);
    });
    return (
        <SafeAreaView style={{ flex: 1 }}>
            <Searchbar
                placeholder="Search Groups"
                onChangeText={onChangeSearch}
                value={searchQuery}
            />
            <FlatList
                contentContainerStyle={styles.container}
                numColumns={1}
                data={groups}
                renderItem={renderProfile}
                keyExtractor={item => item._id}
                ListHeaderComponent={searchQuery ? <></> : <Title style={styles.title} >Groups you follow:</Title>}
            />
        </SafeAreaView>
    )
}

export default Groups;

const styles = StyleSheet.create({
    container: {
        padding: 5,
    },
    title: {
        padding: 10,
        fontSize: 30,
        marginTop: 15,
        fontWeight: "bold",
        color: "#777"
    }
});