import React, { useCallback, useEffect, useState } from 'react';
import { View, FlatList, StyleSheet, Platform, Alert, BackHandler, Text, ToastAndroid } from 'react-native';
import LottieView from 'lottie-react-native';
import { InsideHeader } from '../../Component/Index';
import colors from '../../Constant/Color';
import { useWebSocketService } from '../../socket/Socket';
import Variables from '../../Constant/Variable';
import { useSelector } from 'react-redux';
import { apiCall } from '../../Axios/Axios';
import { AUCTION_ONE_TIME_BID, GET_AUCTION_DETAILS, REVERSE_AUCTION_ITEM, SELECTED_AUCTION_ITEM } from '../../Services/ApiCall/ApiUrls';
import { CommonActions, useFocusEffect, useNavigation } from '@react-navigation/native';
import NavigationString from '../../Constant/NavigationString';
import CountdownTimer from '../../Component/Counter/CountdownTimer';
import { useTheme } from '../../Hooks/useTheme';
import AppText from '../../components/AppText';
import ReverseBiddingCard from './Component/ReverseBiddingCard';
import ConfirmBidModal from './Component/ConfirmBidModal';
import GoBackModal from './Component/GoBackModal';

const StartReverseBidding = () => {
    const { colors } = useTheme();
    const styles = React.useMemo(() => makeStyles(colors), [colors]);
    const SelectedAuction = useSelector((state: any) => state.auction.auction);
    const loginUser = useSelector((state: any) => state.token.token)
    const Navigation: any = useNavigation()
    const [items, setItems] = useState<any>([]);
    const [bidValues, setBidValues] = useState<Record<number, number>>({});
    const [allBoolean, setAllBoolean] = useState({ showSuccess: false, showDialog: false, showBackDialog: false, bidPayload: {} as any, oneTimeBid: false, rebid: false, reload: false })
    const { subscribe, createRoom, placeBid } = useWebSocketService(
        Variables.webSocketUrl,
        () => console.log('Connected!'),
        (error) => console.log('WebSocket Error:', error),
        loginUser.token,
    );
    const getAuction = async () => {
        const selectedRes = await apiCall<any>('get', GET_AUCTION_DETAILS, {}, { id: SelectedAuction.auctionId });
        if (selectedRes.statusCode == 200 && selectedRes.data.contractorId.length) {
            setAllBoolean((prev: any) => ({ ...prev, oneTimeBid: true }))
        }
    }

    const getOneTimeBidValue = async () => {
        try {
            const selectedRes = await apiCall<any>('get', AUCTION_ONE_TIME_BID, {}, { auctionId: SelectedAuction.auctionId });
            if (selectedRes.statusCode == 200) {
                return selectedRes.data
            } else {
                return []
            }
        } catch (error) {

        }

    }
    
    const getAllAcutionItems = async () => {
        try {
            const payload = { auctionNumber: SelectedAuction.auctionNumber };
            let auctionItem: any[] = [];

            if (SelectedAuction.auctionPattern === 'Reverse') {
                const res = await apiCall<any>('get', REVERSE_AUCTION_ITEM, {}, payload);
                if (res?.statusCode === 200) auctionItem = res.data || [];
            }

            const selectedRes = await apiCall<any>('get', SELECTED_AUCTION_ITEM, {}, payload);

            const uniqueArray: number[] = Array.from(
                new Set(selectedRes?.data || [])
            );

            const filteredItems = auctionItem.filter(item =>
                uniqueArray.includes(item.id)
            );

            if (SelectedAuction.auctionCategories == 'Live') {
                const result = await createRoom(SelectedAuction.auctionNumber);

                subscribe(`/topic/room/${SelectedAuction.auctionNumber}`, data => {
                    console.log('🔥 BID UPDATE:', data);
                });
                const bidAmountMap2 = new Map<number, { bidAmount: number; contractorId: number }>();

                (result || []).forEach((r: any) => {
                    bidAmountMap2.set(r.auctionItemId, {
                        bidAmount: r.bidAmount,
                        contractorId: r.contractorId,
                    });
                });
                // Check One Time bid enable butoon
                if (SelectedAuction.auctionCategories != 'Live') {
                    const myBid = result.find(
                        (bid: any) => bid.contractorId === loginUser.contractorId
                    );

                    if (myBid) {
                        setAllBoolean((prev: any) => ({ ...prev, oneTimeBid: true }))
                    }
                }

                const bidAmountMap = new Map<number, number>();

                (result || []).forEach((r: any) => {
                    bidAmountMap.set(r.auctionItemId, r.bidAmount);
                });

                const updatedFilteredItems = filteredItems.map(item => {
                    const bidData = bidAmountMap2.get(item.id);
                    return {
                        ...item,
                        bidAmount: bidData?.bidAmount ?? item.auctionStartValue,
                        bidAvilable: bidData?.bidAmount ?? 0,
                        me: bidData?.contractorId == loginUser.contractorId ? true : false
                    };
                });

                const initialBids: Record<number, number> = {};
                updatedFilteredItems.forEach(item => {
                    initialBids[item.id] = item.bidAmount;
                });
                setBidValues(initialBids);
                setItems(updatedFilteredItems);
            } else {
                let result = []
                if (SelectedAuction.rebidAllowed) {
                    setAllBoolean((prev: any) => ({ ...prev, rebid: true }))
                }

                if (SelectedAuction.auctionCategories != 'Live') {
                    result = await getOneTimeBidValue()
                }
                const bidMap = new Map<number, any>();

                result.forEach((bid: any) => {
                    bidMap.set(bid.auctionItemId, bid);
                });
                const mergedData = auctionItem.map((item: any) => {
                    const bid = bidMap.get(item.id);

                    if (!bid) {
                        return {
                            ...item,
                            bidAmount: item.auctionStartValue,
                            contractorId: item.contractorId,
                        };
                    }

                    return {
                        ...item,
                        bidAmount: bid.bidAmount,
                        bidId: bid.bidId,
                        contractorId: bid.contractorId,
                        contractorName: bid.contractorName,
                        me: bid.contractorId === loginUser.contractorId,
                        bidTime: bid.bidTime,
                    };
                });
                const initialBids: Record<number, number> = {};
                mergedData.forEach(item => {
                    initialBids[item.id] = item.bidAmount;
                });
                setBidValues(initialBids);
                setItems(mergedData)
                setBidValues(initialBids);
            }
        } catch (error) {
            console.error('Error fetching auction items:', error);
        }
    };

    subscribe(`/topic/room/${SelectedAuction.auctionNumber}`, async (message) => {

        const result = message[message.length - 1]

        const updatedBidItem = (prev: any[]) =>
            prev.map(item =>
                item.id === result.auctionItemId
                    ? { ...item, bidAmount: result.bidAmount, me: result.contractorId == loginUser.contractorId ? true : false }
                    : item
            );

        setItems(updatedBidItem);

        setBidValues(prev => ({
            ...prev,
            [result.auctionItemId]: result.bidAmount,
        }));
        try {

        } catch (err) {
            console.log('JSON parse error:', err);
        }
    });

    useEffect(() => {
        if (SelectedAuction.auctionCategories == 'One-time') {
            getAuction()
        }
        getAllAcutionItems();
        subscribe(`/topic/room/${SelectedAuction.auctionNumber}`, (data) => { });
    }, [allBoolean.reload]);

    useEffect(() => {
        const initial: Record<number, number> = {};
        items.forEach((item: any) => {
            initial[item.id] = item.bidAmount + item.bidVariationValue;
        });
        setBidValues(initial);
    }, []);

    const handleUpdate = (id: number, val: number) => {
        setBidValues(prev => ({ ...prev, [id]: prev[id] + val }));
    };

    const submitBid = async (item: any) => {
        const payload = {
            itemId: item.id,
            bidAmount: bidValues[item.id],
            auctionId: SelectedAuction.auctionId,
            contractorId: loginUser.contractorId,
            fullName: loginUser.fullName,
            roomId: SelectedAuction.auctionNumber,
        };
        setAllBoolean((prev: any) => ({ ...prev, bidPayload: payload, showDialog: true }));
    };

    const placeBidSubmit = async (data: any) => {
        setAllBoolean((prev: any) => ({ ...prev, showDialog: false }));
        try {
            const result: any = await placeBid(data);

            if (result?.status && result.data) {
                const updatedBidItem = (prev: any[]) =>
                    prev.map(item =>
                        item.id === result.data.auctionItemId
                            ? { ...item, bidAmount: result.data.bidAmount, me: result.data?.contractorId == loginUser.contractorId ? true : false }
                            : item
                    );

                getAllAcutionItems()
            }
        } catch (error) {
            console.error('Error placing bid:', error);
        }
    };

    useFocusEffect(
        useCallback(() => {
            const onBackPress = () => {
                setAllBoolean((prev: any) => ({ ...prev, showBackDialog: true }));
                return true; // block default back action
            };

            const subscription = BackHandler.addEventListener(
                'hardwareBackPress',
                onBackPress
            );

            return () => subscription.remove();
        }, [Navigation])
    );

    return (
        <View style={styles.container}>
            <InsideHeader title="Bidding Panel" showArrow />
            <View style={styles.container2}>
                <AppText variant="h3" color={colors.text} bold style={styles.title as any}>
                    {SelectedAuction.deptName}
                </AppText>

                <View style={styles.timerWrapper}>
                    <CountdownTimer
                        endDate={SelectedAuction.keyDates.auctionBidding.endDateTime}
                        myStyle={{ fontSize: 30 }}
                        size={30}
                    />
                </View>
            </View>

            <FlatList
                data={items}
                keyExtractor={item => item.id.toString()}
                renderItem={({ item, index }) => (
                    <ReverseBiddingCard
                        item={{ ...item, index }}
                        bidValue={bidValues[item.id] || 0}
                        onIncrease={() => handleUpdate(item.id, item.emdAmount)}
                        onDecrease={() => handleUpdate(item.id, -item.emdAmount)}
                        onPlaceBid={() => { submitBid(item) }}
                        SelectedAuction={SelectedAuction}
                        allBoolean={allBoolean}
                        setAllBoolean={setAllBoolean}
                    />
                )}
                contentContainerStyle={{ padding: 16 }}
            />

            {allBoolean.showSuccess && (
                <View style={styles.overlay}>
                    <LottieView
                        source={require('../../lottie/Success.json')}
                        autoPlay
                        loop={false}
                        style={{ width: 200, height: 200 }}
                    />
                </View>
            )}

            <ConfirmBidModal
                visible={allBoolean.showDialog}
                onClose={() => setAllBoolean(prev => ({ ...prev, showDialog: false }))}
                onConfirm={() => placeBidSubmit(allBoolean.bidPayload)}
                bidAmount={allBoolean.bidPayload?.bidAmount}
            />

            <GoBackModal
                visible={allBoolean.showBackDialog}
                onClose={() => setAllBoolean(prev => ({ ...prev, showBackDialog: false }))}
                onConfirm={() => {
                    setAllBoolean(prev => ({ ...prev, showBackDialog: false }));
                    Navigation.dispatch(
                        CommonActions.reset({
                            index: 0,
                            routes: [{ name: NavigationString.Home }],
                        })
                    );
                }}
            />
        </View>
    );
};

export default StartReverseBidding;

const makeStyles = (colors: any) => StyleSheet.create({
    container: { flex: 1, backgroundColor: colors.background },
    container2: {
        paddingHorizontal: 16,
        paddingTop: 12,
        paddingBottom: 8,
    },
    title: {
        marginBottom: 6,
    } as any,
    timerWrapper: {
        alignItems: 'center',
    },
    overlay: { ...StyleSheet.absoluteFillObject, backgroundColor: colors.overlay, justifyContent: 'center', alignItems: 'center', zIndex: 99 },
});