import React, { useState, useEffect } from "react";
import {
    StyleSheet,
    Text,
    View,
    FlatList,
    TouchableOpacity,
    Modal,
    PermissionsAndroid,
    Platform,
    NativeModules,
    Linking,
    Alert,
} from "react-native";
import AppView from "../../components/AppView";
import colors from "../../components/colors";

const { ContactsModule } = NativeModules;

const APP_URL = "https://play.google.com/store/apps/details?id=com.yourapp"; // replace with your real app url

const YourContacts = () => {
    const [contacts, setContacts] = useState<any[]>([]);
    const [selectedContact, setSelectedContact] = useState<any>(null);
    const [modalVisible, setModalVisible] = useState(false);

    useEffect(() => {
        handleFetchContacts();
    }, []);

    const handleFetchContacts = async () => {
        try {
            if (Platform.OS === "android") {
                const granted = await PermissionsAndroid.request(
                    PermissionsAndroid.PERMISSIONS.READ_CONTACTS,
                    {
                        title: "Contacts Permission",
                        message: "This app would like to view your contacts.",
                        buttonPositive: "OK",
                    }
                );

                if (granted !== PermissionsAndroid.RESULTS.GRANTED) {
                    console.log("Contacts permission denied");
                    return;
                }
            }

            const fetchedContacts = await ContactsModule.getContacts();
            setContacts(fetchedContacts);
        } catch (error) {
            console.error("Error fetching contacts:", error);
        }
    };

    const APP_URL = "https://play.google.com/store/apps/details?id=com.yourapp"; // your app link
    const WHATSAPP_URL = "https://play.google.com/store/apps/details?id=com.whatsapp"; // fallback store link

    const handleSend = async (contact: any) => {
        if (!contact) return;

        const message = `Hey ${contact.name}, check out this awesome app! Download here: ${APP_URL}`;

        // direct send to contact if you want
        const url = `whatsapp://send?phone=${contact.phone}&text=${encodeURIComponent(
            message
        )}`;

        try {
            const supported = await Linking.canOpenURL("whatsapp://send");
            if (supported) {
                // WhatsApp installed
                await Linking.openURL(url);
            } else {
                // WhatsApp not installed → send user to Play Store/App Store
                if (Platform.OS === "android") {
                    await Linking.openURL(WHATSAPP_URL);
                } else if (Platform.OS === "ios") {
                    await Linking.openURL("itms-apps://apps.apple.com/app/whatsapp-messenger/id310633997");
                }
            }
        } catch (err) {
            console.error("Error sending to WhatsApp:", err);
            Alert.alert("Error", "Something went wrong while trying to open WhatsApp");
        }

        setModalVisible(false);
    };


    const renderContact = ({ item }: { item: any }) => (
        <View style={styles.contactRow}>
            <View style={styles.avatar}>
                <Text style={styles.avatarText}>
                    {item.name ? item.name.charAt(0).toUpperCase() : "?"}
                </Text>
            </View>
            <View style={styles.contactInfo}>
                <Text style={styles.contactName}>{item.name}</Text>
                <Text style={styles.contactPhone}>{item.phone}</Text>
            </View>
            <TouchableOpacity
                style={styles.inviteButton}
                onPress={() => {
                    setSelectedContact(item);
                    setModalVisible(true);
                }}
            >
                <Text style={styles.inviteText}>Invite</Text>
            </TouchableOpacity>
        </View>
    );

    return (
        <AppView>
            <View>
              <Text style={styles.header}>Select Contact</Text>  
              
            </View>
            
            <FlatList
                data={contacts}
                keyExtractor={(item, index) => index.toString()}
                renderItem={renderContact}
            />

            {/* Send Modal */}
            <Modal
                transparent={true}
                visible={modalVisible}
                animationType="slide"
                onRequestClose={() => setModalVisible(false)}
            >
                <View style={styles.modalOverlay}>
                    <View style={styles.modalContent}>
                        <Text style={styles.modalTitle}>Send Invite</Text>
                        {selectedContact && (
                            <Text style={styles.modalText}>
                                Send invite to {selectedContact.name} ({selectedContact.phone})
                            </Text>
                        )}
                        <View style={styles.modalActions}>
                            <TouchableOpacity
                                style={styles.cancelButton}
                                onPress={() => setModalVisible(false)}
                            >
                                <Text style={styles.cancelText}>Cancel</Text>
                            </TouchableOpacity>
                            <TouchableOpacity
                                style={styles.sendButton}
                                onPress={() => handleSend(selectedContact)}
                            >
                                <Text style={styles.sendText}>Send</Text>
                            </TouchableOpacity>
                        </View>
                    </View>
                </View>
            </Modal>
        </AppView>
    );
};


export default YourContacts;

const styles = StyleSheet.create({
    container: {
        flex: 1,
        backgroundColor: "#fff",
        paddingHorizontal: 10,
        paddingTop: 20,
    },
    header: {
        fontSize: 20,
        fontWeight: "bold",
        marginBottom: 15,
    },
    contactRow: {
        flexDirection: "row",
        alignItems: "center",
        paddingVertical: 12,
        borderBottomWidth: 0.5,
        borderBottomColor: "#ddd",
    },
    avatar: {
        width: 45,
        height: 45,
        borderRadius: 25,
        backgroundColor: colors.pastelOrange,
        justifyContent: "center",
        alignItems: "center",
        marginRight: 12,
    },
    avatarText: {
        color: "#fff",
        fontSize: 18,
        fontWeight: "bold",
    },
    contactInfo: {
        flex: 1,
    },
    contactName: {
        fontSize: 16,
        fontWeight: "600",
    },
    contactPhone: {
        fontSize: 13,
        color: "gray",
    },
    inviteButton: {
        paddingHorizontal: 14,
        paddingVertical: 6,
        borderRadius: 8,
        borderWidth: 1,
        borderColor: colors.Settings,
    },
    inviteText: {
        color: colors.Settings,
        fontWeight: "bold",
    },
    modalOverlay: {
        flex: 1,
        backgroundColor: "rgba(0,0,0,0.5)",
        justifyContent: "center",
        alignItems: "center",
    },
    modalContent: {
        width: "80%",
        backgroundColor: "#fff",
        borderRadius: 10,
        padding: 20,
        alignItems: "center",
    },
    modalTitle: {
        fontSize: 18,
        fontWeight: "bold",
        marginBottom: 10,
    },
    modalText: {
        fontSize: 15,
        marginBottom: 20,
        textAlign: "center",
    },
    modalActions: {
        flexDirection: "row",
        justifyContent: "space-between",
        width: "100%",
    },
    cancelButton: {
        flex: 1,
        marginRight: 10,
        paddingVertical: 10,
        borderRadius: 8,
        backgroundColor: "#ddd",
        alignItems: "center",
    },
    cancelText: {
        fontWeight: "bold",
        color: "#333",
    },
    sendButton: {
        flex: 1,
        marginLeft: 10,
        paddingVertical: 10,
        borderRadius: 8,
        backgroundColor: colors.pastelOrange,
        alignItems: "center",
    },
    sendText: {
        fontWeight: "bold",
        color: "#fff",
    },
});