Create a Tic-Tac-Toe using React-Native

import React, { Component } from 'react';
import { View, Text, TouchableOpacity, Button, StyleSheet } from 'react-native';
import { Provider as PaperProvider, Appbar } from 'react-native-paper';

class TicTacToe extends Component {
    constructor(props) {
        super(props);
        this.state = {
            squares: Array(9).fill(null),
            xIsNext: true,
        };
    }

    // Function to handle clicks on the squares
    handleClick(i) {
        const squares = this.state.squares.slice();
        if (calculateWinner(squares) || squares[i]) {
            return;
        }
        squares[i] = this.state.xIsNext ? 'X' : 'O';
        this.setState({
            squares: squares,
            xIsNext: !this.state.xIsNext,
        });
    }

    // Function to restart the game
    restartGame() {
        this.setState({
            // Set default values to reset the game
            squares: Array(9).fill(null),
            xIsNext: true,
        });
    }

    // Function to render the squares while playing
    renderSquare(i) {
        return (
            // render individual squares
            <TouchableOpacity
                style={styles.square}
                onPress={() => this.handleClick(i)}
            >
                <Text style={styles.squareText}>
                    {this.state.squares[i]}
                </Text>
            </TouchableOpacity>
        );
    }

    // Function to render everything inside the component
    render() {
        const winner = calculateWinner(this.state.squares);
        let status;
        // if someone won the game, change the status to winner
        // if all the squares are filled and no one has won, display as draw!
        if (winner) {
            status = `Winner: ${winner}`;
        } else if (this.state.squares.every((square) => square !== null)) {
            status = 'Draw!';
        } else {
            status = `Next player: ${this.state.xIsNext ? 'X' : 'O'}`;
        }
        // return entire game screen
        return (
            <View style={styles.container}>
                <Text style={styles.title}>Tic Tac Toe</Text>
                <View style={{ flexDirection: 'row', flexWrap: 'wrap' }}>
                    {this.renderSquare(0)}
                    {this.renderSquare(1)}
                    {this.renderSquare(2)}
                </View>
                <View style={{ flexDirection: 'row', flexWrap: 'wrap' }}>
                    {this.renderSquare(3)}
                    {this.renderSquare(4)}
                    {this.renderSquare(5)}
                </View>
                <View style={{ flexDirection: 'row', flexWrap: 'wrap' }}>
                    {this.renderSquare(6)}
                    {this.renderSquare(7)}
                    {this.renderSquare(8)}
                </View>
                <Text style={styles.status}>{status}</Text>
                <Button
                    title="Restart Game"
                    onPress={() => this.restartGame()}
                    style={styles.restartButton}
                />
            </View>
        );
    }
}

// Stylings
const styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
        backgroundColor: '#FFFFE0',
    },
    title: {
        fontSize: 24,
        marginBottom: 20,
    },
    square: {
        width: 100,
        height: 100,
        borderWidth: 1,
        borderColor: 'black',
        justifyContent: 'center',
        alignItems: 'center',
    },
    squareText: {
        fontSize: 40,
    },
    status: {
        marginVertical: 20,
        fontSize: 20,
    },
    restartButton: {
        marginTop: 10,
    },
});

// Function to determine the winner
function calculateWinner(squares) {
    const lines = [
        [0, 1, 2],
        [3, 4, 5],
        [6, 7, 8],
        [0, 3, 6],
        [1, 4, 7],
        [2, 5, 8],
        [0, 4, 8],
        [2, 4, 6],
    ];
    for (let i = 0; i < lines.length; i++) {
        const [a, b, c] = lines[i];
        if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
            return squares[a];
        }
    }
    return null;
}

// Return the entire component
export default function App() {
    return (
        <PaperProvider>
            <Appbar.Header>
                <Appbar.Content title="Tic Tac Toe" />
            </Appbar.Header>
            <TicTacToe />
        </PaperProvider>
    );
}