import {BSON} from "realm";
import {ActivityIndicator, Button, Text, useTheme} from "react-native-paper";
import React, {useCallback, useEffect, useLayoutEffect, useMemo, useState} from "react";
import {Alert, Platform, RefreshControl, ScrollView, Share, StyleSheet, View} from "react-native";
import {
    CircleCheck,
    CircleDot,
    CircleEllipsis,
    CreditCard,
    Plus,
    SmartphoneNfcIcon,
    WifiOff,
    TvMinimalPlay,
    Star,
    SquareArrowOutUpRight
} from "lucide-react-native";

import {EmptyStatePlaceholder} from "../components/EmptyStatePlaceholder";
import {AMUIStatusAlert} from "../components/AMUIStatusAlert";
import {AMUICardDetail} from "../components/AMUICard";
import {ICCard} from "../components/ICCard";

import RealmContext from "../models/RealmContext";
import {AMServer} from "../models/AMServer";
import {AMCard} from "../models/AMCard";

import {
    AMCardInRequest,
    AMServerConnectionInfo,
    AMServerInstanceMetrics,
    fetchServerInfo,
    getGameName,
    performCardIn
} from "amnet-shared";

import ObjectId = BSON.ObjectId;
import {AMCardRecentUse} from "../models/AMCardRecentUse";
import {MenuAction, MenuView, NativeActionEvent} from "@react-native-menu/menu";

const {useRealm, useQuery, useObject} = RealmContext;

export default function ServerCardIn({route, navigation}) {
    const realm = useRealm();
    const theme = useTheme()

    const {serverId} = route.params;
    const server = useObject(AMServer, ObjectId.createFromHexString(serverId));
    const cards = useQuery({
        type: AMCard,
        query: q => q.sorted("lastUsed", true)
    });

    // header actions
    const menuCallback = useCallback(async (e: NativeActionEvent) => {
        switch (e.nativeEvent.event) {
            case "share":
                Share.share({url: server.shareUrl});
                break;

            case "delete":
                Alert.alert("Delete Server", "Are you sure you want to delete this server?", [
                    {
                        text: "Cancel",
                        style: "cancel"
                    },
                    {
                        text: "Delete",
                        style: "destructive",
                        onPress: () => {
                            realm.write(() => {
                                realm.delete(server);
                                navigation.goBack();
                            });
                        }
                    }
                ]);

                break;
        }
    }, [realm, server, navigation]);

    // server state
    const [serverRefreshing, setServerRefreshing] = useState<boolean>(false);
    const [serverReloadCounter, setServerReloadCounter] = useState<number>(0);
    const [serverConnectionSuccess, setServerConnectionSuccess] = useState<boolean | null>(null);

    const [userSelectedCard, setUserSelectedCard] = useState<AMCard | null>(null);
    const [cardInCompleted, setCardInCompleted] = useState<boolean | null>(null);

    const disableCardIn = useMemo(() => cardInCompleted !== null || !serverConnectionSuccess, [cardInCompleted, serverConnectionSuccess]);
    const serverDefaultCard = useMemo(() => {
        if (server?.isValid() !== true || !server.gameId) {
            return null;
        }

        return realm.objects<AMCardRecentUse>(AMCardRecentUse.schema.name).find(x => x.gameId === server.gameId)?.card;
    }, [realm, cards, server?.gameId]);

    const selectedCard = useMemo(() => [userSelectedCard, serverDefaultCard, cards.at(0)].find(x => x?.isValid() == true) ?? null, [userSelectedCard, serverDefaultCard, cards]);
    const unselectedCards = useMemo(() => cards.filter(x => x.isValid() === true && x._id.toHexString() !== selectedCard?._id.toHexString()), [cards, selectedCard]);

    useLayoutEffect(() => {
        if (server?.isValid() !== true) {
            return;
        }

        navigation.setOptions({
            title: server.serverName,
            headerRight: () => (
                <MenuView actions={menuActions} onPressAction={menuCallback}>
                    <CircleEllipsis color={theme.colors.primary}/>
                </MenuView>
            )
        });
    }, [navigation, server]);

    useEffect(() => {
        if (server?.isValid() !== true) {
            navigation.goBack();
            return;
        }

        if (!serverConnectionSuccess) {
            return;
        }

        const metrics = server as AMServerInstanceMetrics;
        if (metrics.sessionUptime > 0 && metrics.timeSinceLastPoll === null) {
            const timeout = setTimeout(() => setServerReloadCounter(serverReloadCounter + 1), 5000);
            return () => clearTimeout(timeout);
        }
    }, [serverConnectionSuccess, server]);

    // invalid card/server selection
    useEffect(() => {
        if (userSelectedCard?.isValid() === false) {
            setUserSelectedCard(null);
        }
    }, [userSelectedCard]);

    // server info update
    useEffect(() => {
        const abortController = new AbortController();
        fetchServerInfo(server.serverAddress, abortController.signal).then(r => {
            if (!r) {
                setServerConnectionSuccess(false);
                return;
            }

            setServerConnectionSuccess(true);

            realm.write(() => {
                server.lastUsed = new Date();
                Object.keys(r).forEach(x => server[x] = r[x]);
            });
        }).catch(() => {
            setServerConnectionSuccess(false);
        }).finally(() => {
            setServerRefreshing(false);
        });

        const timeout = setTimeout(() => abortController.abort(), 5000);
        return () => {
            clearTimeout(timeout);
            abortController.abort();
        }
    }, [serverId, serverReloadCounter, realm]);

    const cardInCallback = useCallback((card: AMCard) => {
        const abortController = new AbortController();
        const request: AMCardInRequest = {
            cardId: card.code,
            physicalCardIDm: card.physicalCardData?.cardIDm ?? undefined
        };

        performCardIn(server, request, abortController.signal).then(r => {
            const now = new Date();
            realm.write(() => {
                server.lastUsed = now;
                card.lastUsed = now;

                if (server.gameId) {
                    // replace the "most recent card" record for the current game
                    realm.delete(realm.objects(AMCardRecentUse.schema.name).filtered("gameId = $0", server.gameId));
                    realm.create(AMCardRecentUse.schema.name, AMCardRecentUse.generate(server.gameId, card));
                }
            });

            setCardInCompleted(r);
        }).catch(() => {
            setCardInCompleted(false);
        }).finally(() => {
            setTimeout(() => setCardInCompleted(null), 3000);
        });

        setTimeout(() => abortController.abort(), 5000);
        return () => abortController.abort();
    }, [server]);

    const performRefresh = () => {
        setServerRefreshing(true);
        setServerReloadCounter(serverReloadCounter + 1);
    };

    if (server?.isValid() !== true) {
        return null;
    }

    if (serverConnectionSuccess === null) {
        return (
            <View style={{flex: 1, justifyContent: "center", alignItems: "center", gap: 10}}>
                <ActivityIndicator animating/>
                <Text variant="bodyMedium">Connecting to server...</Text>
            </View>
        )
    }

    return (
        <ScrollView contentInsetAdjustmentBehavior="automatic" refreshControl={<RefreshControl refreshing={serverRefreshing} onRefresh={performRefresh}/>}>
            <View style={styles.container}>
                <StatusAlert server={server} connectionEstablished={serverConnectionSuccess}/>
                <View style={styles.section}>
                    <Text variant="titleLarge" style={styles.sectionTitle}>{server.gameId ? `Play ${getGameName(server.gameId)}` : "Selected Card"}</Text>
                    {selectedCard ? <>
                            <ICCard actionDisabled
                                    card={selectedCard}
                                    actionIcon={<CircleCheck color="green" size={24}/>}>
                                {serverDefaultCard?.code == selectedCard.code && <DefaultCardDetail/>}
                            </ICCard>
                            <Button style={{flex: 1}}
                                        textColor="white"
                                        disabled={disableCardIn}
                                        contentStyle={{flexDirection: 'row-reverse'}}
                                        mode={serverConnectionSuccess ? "contained" : "outlined"}
                                        buttonColor={cardInCompleted === false ? "red" : "green"}
                                        onPress={() => cardInCallback(selectedCard)}
                                        icon={() => <SquareArrowOutUpRight color={disableCardIn ? "gray" : "white"} size={18}/>}>
                                {cardInCompleted === null ? "Card In" : cardInCompleted ? "Card In Success" : "Failed"}
                            </Button>
                        </>
                        : <View style={styles.emptyPlaceholderView}>
                            <EmptyStatePlaceholder message="No card selected" icon={<CreditCard color="gray"/>}/>
                            <Button mode="text"
                                    icon={() => <Plus color={theme.colors.primary} size={18}/>}
                                    onPress={() => navigation.navigate('add-card')}>
                                Add Card
                            </Button>
                        </View>
                    }
                </View>

                {cards.length > 0 && (
                    <View style={styles.section}>
                        <Text variant="titleLarge" style={styles.sectionTitle}>Additional Cards</Text>
                        <Button mode="contained"
                                textColor="white"
                                buttonColor={theme.colors.tertiary}
                                contentStyle={{flexDirection: 'row-reverse'}}
                                icon={() => <Plus color="white" size={18}/>}
                                onPress={() => navigation.navigate('add-card')}>
                            Add Card
                        </Button>

                        {unselectedCards.length
                            ? unselectedCards.map((card: AMCard) => (
                                <ICCard card={card}
                                        key={card._id.toHexString()}
                                        actionIcon={<CircleDot color={theme.colors.tertiary} size={24}/>}
                                        onPress={() => setUserSelectedCard(card)}>
                                    {serverDefaultCard?.code == card.code && <DefaultCardDetail/>}
                                </ICCard>))
                            : <View style={styles.emptyPlaceholderView}>
                                <EmptyStatePlaceholder message="No additional cards" icon={<SmartphoneNfcIcon color="gray"/>}/>
                            </View>}
                    </View>)}
            </View>
        </ScrollView>
    )
}

function StatusAlert(props: {
    server: AMServerConnectionInfo & Partial<AMServerInstanceMetrics>,
    connectionEstablished: boolean
}) {
    if (!props.connectionEstablished) {
        return (
            <AMUIStatusAlert color="red" icon={WifiOff} title="Connection Failed">
                <Text variant="bodyMedium">
                    There was an issue connecting to <Text variant="bodyMedium"
                    style={{fontFamily: "JetBrainsMono_400Regular"}}>{props.server.serverAddress}</Text>.
                    Check the network connection and try again.
                </Text>
            </AMUIStatusAlert>
        )
    }

    // don't show if undefined (some older server versions)
    if (props.server.timeSinceLastPoll === null) {
        return (
            <AMUIStatusAlert color="#822eff" icon={TvMinimalPlay} title="Server Startup">
                <Text variant="bodyMedium">
                    Scanning a card below may not have any effect until the service has fully started up.
                </Text>
            </AMUIStatusAlert>
        )
    }

    return null;
}

function DefaultCardDetail() {
    return (
        <>
            {/* spacer */}
            <View></View>
            <AMUICardDetail>
                <Star size={18} color="goldenrod"/>
                <Text style={{color: "goldenrod"}}>Previously used with this game</Text>
            </AMUICardDetail>
        </>

    )
}

const menuActions: MenuAction[] = [
    {
        id: "share",
        title: "Share",
        image: Platform.select({
            ios: "square.and.arrow.up",
            android: "share"
        })
    },
    {
        id: "delete",
        title: "Delete Server",
        attributes: {
            destructive: true,
        },
        image: Platform.select({
            ios: "trash",
            android: "delete"
        })
    }
];

const styles = StyleSheet.create({
    section: {
        gap: 10
    },
    sectionTitle: {
        fontWeight: "bold"
    },
    emptyPlaceholderView: {
        marginVertical: 30,
        gap: 15
    },
    container: {
        paddingTop: Platform.select({android: 120, default: 0}),
        paddingHorizontal: 16,
        paddingBottom: 80,
        gap: 20
    }
});