<?php

declare(strict_types=1);

/*
 * This file is a part of dflydev/dot-access-data.
 *
 * (c) Dragonfly Development Inc.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Dflydev\DotAccessData;

use ArrayAccess;
use Dflydev\DotAccessData\Exception\DataException;
use Dflydev\DotAccessData\Exception\InvalidPathException;
use Dflydev\DotAccessData\Exception\MissingPathException;

/**
 * @implements ArrayAccess<string, mixed>
 */
class Data implements DataInterface, ArrayAccess
{
    private const DELIMITERS = ['.', '/'];

    /**
     * Internal representation of data data
     *
     * @var array<string, mixed>
     */
    protected $data;

    /**
     * Constructor
     *
     * @param array<string, mixed> $data
     */
    public function __construct(array $data = [])
    {
        $this->data = $data;
    }

    /**
     * {@inheritdoc}
     */
    public function append(string $key, $value = null): void
    {
        $currentValue =& $this->data;
        $keyPath = self::keyToPathArray($key);

        $endKey = array_pop($keyPath);
        foreach ($keyPath as $currentKey) {
            if (! isset($currentValue[$currentKey])) {
                $currentValue[$currentKey] = [];
            }
            $currentValue =& $currentValue[$currentKey];
        }

        if (!isset($currentValue[$endKey])) {
            $currentValue[$endKey] = [];
        }

        if (!is_array($currentValue[$endKey])) {
            // Promote this key to an array.
            // TODO: Is this really what we want to do?
            $currentValue[$endKey] = [$currentValue[$endKey]];
        }

        $currentValue[$endKey][] = $value;
    }

    /**
     * {@inheritdoc}
     */
    public function set(string $key, $value = null): void
    {
        $currentValue =& $this->data;
        $keyPath = self::keyToPathArray($key);

        $endKey = array_pop($keyPath);
        foreach ($keyPath as $currentKey) {
            if (!isset($currentValue[$currentKey])) {
                $currentValue[$currentKey] = [];
            }
            if (!is_array($currentValue[$currentKey])) {
                throw new DataException(sprintf('Key path "%s" within "%s" cannot be indexed into (is not an array)', $currentKey, self::formatPath($key)));
            }
            $currentValue =& $currentValue[$currentKey];
        }
        $currentValue[$endKey] = $value;
    }

    /**
     * {@inheritdoc}
     */
    public function remove(string $key): void
    {
        $currentValue =& $this->data;
        $keyPath = self::keyToPathArray($key);

        $endKey = array_pop($keyPath);
        foreach ($keyPath as $currentKey) {
            if (!isset($currentValue[$currentKey])) {
                return;
            }
            $currentValue =& $currentValue[$currentKey];
        }
        unset($currentValue[$endKey]);
    }

    /**
     * {@inheritdoc}
     *
     * @psalm-mutation-free
     */
    public function get(string $key, $default = null)
    {
        /** @psalm-suppress ImpureFunctionCall */
        $hasDefault = \func_num_args() > 1;

        $currentValue = $this->data;
        $keyPath = self::keyToPathArray($key);

        foreach ($keyPath as $currentKey) {
            if (!is_array($currentValue) || !array_key_exists($currentKey, $currentValue)) {
                if ($hasDefault) {
                    return $default;
                }

                throw new MissingPathException($key, sprintf('No data exists at the given path: "%s"', self::formatPath($keyPath)));
            }

            $currentValue = $currentValue[$currentKey];
        }

        return $currentValue === null ? $default : $currentValue;
    }

    /**
     * {@inheritdoc}
     *
     * @psalm-mutation-free
     */
    public function has(string $key): bool
    {
        $currentValue = $this->data;

        foreach (self::keyToPathArray($key) as $currentKey) {
            if (
                !is_array($currentValue) ||
                !array_key_exists($currentKey, $currentValue)
            ) {
                return false;
            }
            $currentValue = $currentValue[$currentKey];
        }

        return true;
    }

    /**
     * {@inheritdoc}
     *
     * @psalm-mutation-free
     */
    public function getData(string $key): DataInterface
    {
        $value = $this->get($key);
        if (is_array($value) && Util::isAssoc($value)) {
            return new Data($value);
        }

        throw new DataException(sprintf('Value at "%s" could not be represented as a DataInterface', self::formatPath($key)));
    }

    /**
     * {@inheritdoc}
     */
    public function import(array $data, int $mode = self::REPLACE): void
    {
        $this->data = Util::mergeAssocArray($this->data, $data, $mode);
    }

    /**
     * {@inheritdoc}
     */
    public function importData(DataInterface $data, int $mode = self::REPLACE): void
    {
        $this->import($data->export(), $mode);
    }

    /**
     * {@inheritdoc}
     *
     * @psalm-mutation-free
     */
    public function export(): array
    {
        return $this->data;
    }

    /**
     * {@inheritdoc}
     *
     * @return bool
     */
    #[\ReturnTypeWillChange]
    public function offsetExists($key)
    {
        return $this->has($key);
    }

    /**
     * {@inheritdoc}
     *
     * @return mixed
     */
    #[\ReturnTypeWillChange]
    public function offsetGet($key)
    {
        return $this->get($key, null);
    }

    /**
     * {@inheritdoc}
     *
     * @param string $key
     * @param mixed $value
     *
     * @return void
     */
    #[\ReturnTypeWillChange]
    public function offsetSet($key, $value)
    {
        $this->set($key, $value);
    }

    /**
     * {@inheritdoc}
     *
     * @return void
     */
    #[\ReturnTypeWillChange]
    public function offsetUnset($key)
    {
        $this->remove($key);
    }

    /**
     * @param string $path
     *
     * @return string[]
     *
     * @psalm-return non-empty-list<string>
     *
     * @psalm-pure
     */
    protected static function keyToPathArray(string $path): array
    {
        if (\strlen($path) === 0) {
            throw new InvalidPathException('Path cannot be an empty string');
        }

        $path = \str_replace(self::DELIMITERS, '.', $path);

        return \explode('.', $path);
    }

    /**
     * @param string|string[] $path
     *
     * @return string
     *
     * @psalm-pure
     */
    protected static function formatPath($path): string
    {
        if (is_string($path)) {
            $path = self::keyToPathArray($path);
        }

        return implode(' » ', $path);
    }
}

• [D] Exception
• [F] Data.php
  Delete
• [F] DataInterface.php
  Delete
• [F] Util.php
  Delete

About Section

About NFC Pay: Our Story and Mission

NFC Pay was founded with a vision to transform the way people handle transactions. Our journey is defined by a commitment to innovation, security, and convenience. We strive to deliver seamless, user-friendly payment solutions that make everyday transactions effortless and secure. Our mission is to empower you to pay with ease and confidence, anytime, anywhere.

• Simplifying Payments, One Tap at a Time.
• Reinventing Your Wallet for Modern Convenience.
• Smart Payments for a Effortless Lifestyle.
• Experience the Ease of Tap and Pay.
• Innovative Solutions for Your Daily Transactions.

FAQ Section

Frequently Asked Questions About NFC Pay

Here are answers to some common questions about NFC Pay. We aim to provide clear and concise information to help you understand how our platform works and how it can benefit you. If you have any further inquiries, please don’t hesitate to contact our support team.

How do I register for NFC Pay?

Download the app and sign up using your email or phone number, then complete the verification process.

Is my payment information secure?

Yes, we use advanced encryption and security protocols to protect your payment details.

Can I add multiple cards to my NFC Pay wallet?

Absolutely, you can link multiple debit or credit cards to your wallet.

How do I transfer money to another user?

Go to the transfer section, select the recipient, enter the amount, and authorize the transfer.

What should I do if I forget my PIN?

Use the “Forgot PIN” feature in the app to reset it following the provided instructions.

How can I activate my merchant account?

Sign up for a merchant account through the app and follow the setup instructions to start accepting payments.

Can I track my payment status?

Yes, you can view and track your payment status in the account dashboard