import {Button, ButtonSize, Dialog, Text, TextField, TextFieldRef, View,} from "react-native-ui-lib";
import React, {useRef, useState} from "react";
import {useSignIn} from "@/hooks/firebase/useSignIn";
import {StyleSheet} from "react-native";
import Toast from "react-native-toast-message";
import {useLoginWithQrCode} from "@/hooks/firebase/useLoginWithQrCode";
import {Camera, CameraView} from "expo-camera";

const SignInPage = ({
                        setTab,
                    }: {
    setTab: React.Dispatch<
        React.SetStateAction<"register" | "login" | "reset-password">
    >;
}) => {
    const [email, setEmail] = useState<string>("");
    const [password, setPassword] = useState<string>("");
    const [hasPermission, setHasPermission] = useState<boolean | null>(null);
    const [showCameraDialog, setShowCameraDialog] = useState<boolean>(false);
    const passwordRef = useRef<TextFieldRef>(null);

    const {mutateAsync: signIn, error, isError} = useSignIn();
    const {mutateAsync: signInWithQrCode} = useLoginWithQrCode();

    const handleSignIn = async () => {
        await signIn({email, password});
        if (!isError) {
            Toast.show({
                type: "success",
                text1: "Login successful!",
            });
        } else {
            Toast.show({
                type: "error",
                text1: "Error logging in",
                text2: `${error}`,
            });
        }
    };

    const handleQrCodeScanned = async ({data}: { data: string }) => {
        setShowCameraDialog(false);
        try {
            await signInWithQrCode({userId: data});
            Toast.show({
                type: "success",
                text1: "Login successful with QR code!",
            });
        } catch (err) {
            Toast.show({
                type: "error",
                text1: "Error logging in with QR code",
                text2: `${err}`,
            });
        }
    };

    const getCameraPermissions = async (callback: () => void) => {
        const {status} = await Camera.requestCameraPermissionsAsync();
        setHasPermission(status === "granted");
        if (status === "granted") {
            callback();
        }
    };

    return (
        <View padding-10 centerV height={"100%"}>
            <TextField
                placeholder="Email"
                keyboardType={"email-address"}
                returnKeyType={"next"}
                textContentType={"emailAddress"}
                defaultValue={email}
                onChangeText={setEmail}
                style={styles.textfield}
                onSubmitEditing={() => {
                    // Move focus to the description field
                    passwordRef.current?.focus();
                }}
            />
            <TextField
                ref={passwordRef}
                placeholder="Password"
                textContentType={"oneTimeCode"}
                value={password}
                onChangeText={setPassword}
                secureTextEntry
                style={styles.textfield}
                autoCorrect={false}
            />
            <Button
                label="Log in"
                marginT-50
                labelStyle={{
                    fontFamily: "PlusJakartaSans_600SemiBold",
                    fontSize: 16,
                }}
                onPress={handleSignIn}
                style={{marginBottom: 20, height: 50}}
                backgroundColor="#fd1775"
            />
            <Button
                label="Log in with a QR Code"
                labelStyle={{
                    fontFamily: "PlusJakartaSans_600SemiBold",
                    fontSize: 16,
                }}
                onPress={() => {
                    getCameraPermissions(() => setShowCameraDialog(true));
                }}
                style={{marginBottom: 20, height: 50}}
                backgroundColor="#fd1775"
            />
            {isError && (
                <Text center style={{marginBottom: 20}}>{`${
                    error?.toString()?.split("]")?.[1]
                }`}</Text>
            )}

            <View row centerH marginB-5 gap-5>
                <Text style={styles.jakartaLight}>Don't have an account?</Text>
                <Button
                    onPress={() => setTab("register")}
                    label="Sign Up"
                    labelStyle={[
                        styles.jakartaMedium,
                        {textDecorationLine: "none", color: "#fd1575"},
                    ]}
                    link
                    size={ButtonSize.xSmall}
                    padding-0
                    margin-0
                    text70
                    left
                    color="#fd1775"
                />
            </View>

            <View row centerH marginB-5 gap-5>
                <Text text70>Forgot your password?</Text>
                <Button
                    onPress={() => setTab("reset-password")}
                    label="Reset password"
                    labelStyle={[
                        styles.jakartaMedium,
                        {textDecorationLine: "none", color: "#fd1575"},
                    ]}
                    link
                    size={ButtonSize.xSmall}
                    padding-0
                    margin-0
                    text70
                    left
                    avoidInnerPadding
                    color="#fd1775"
                />
            </View>

            {/* Camera Dialog */}
            <Dialog
                visible={showCameraDialog}
                onDismiss={() => setShowCameraDialog(false)}
                bottom
                width="100%"
                height="70%"
                containerStyle={{padding: 15, backgroundColor: "white"}}
            >
                {hasPermission === null ? (
                    <Text>Requesting camera permissions...</Text>
                ) : !hasPermission ? (
                    <Text>No access to camera</Text>
                ) : (
                    <CameraView
                        style={{flex: 1, borderRadius: 15}}
                        onBarcodeScanned={handleQrCodeScanned}
                        barcodeScannerSettings={{
                            barcodeTypes: ["qr"],
                        }}
                    />
                )}
                <Button
                    label="Cancel"
                    onPress={() => setShowCameraDialog(false)}
                    backgroundColor="#fd1775"
                    style={{margin: 10, marginBottom: 30}}
                />
            </Dialog>
        </View>
    );
};

const styles = StyleSheet.create({
    textfield: {
        backgroundColor: "white",
        marginVertical: 10,
        padding: 30,
        height: 45,
        borderRadius: 50,
        fontFamily: "PlusJakartaSans_300Light",
    },
    jakartaLight: {
        fontFamily: "PlusJakartaSans_300Light",
        fontSize: 16,
        color: "#484848",
    },
    jakartaMedium: {
        fontFamily: "PlusJakartaSans_500Medium",
        fontSize: 16,
        color: "#919191",
        textDecorationLine: "underline",
    },
});

export default SignInPage;