<?php

require_once __DIR__ . '../../../vendor/autoload.php';
// Load environment variables from .env file
$env_file = dirname(__DIR__) . '/dd/.env';

if (file_exists($env_file)) {
    $lines = file($env_file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
    foreach ($lines as $line) {
        // Remove leading/trailing whitespace
        $line = trim($line);

        // Skip comments (lines starting with #) and empty lines
        if (empty($line) || strpos($line, '#') === 0) {
            continue;
        }

        // Split the line into key and value
        $parts = explode('=', $line, 2); // Limit to 2 parts

        // Check if we have both key and value
        if (count($parts) === 2) {
            list($key, $value) = $parts;
            //remove any quotes around the value.
            $value = trim($value, "'\"");
            // Set the environment variable
            putenv("$key=$value");
        } else {
            // Log a warning if the line is invalid.  CRITICAL for debugging!
            error_log("Invalid line in .env file: " . $line);
        }
    }
}
// ✅ كلاس التشفير المتطابق مع Flutter
class EncryptionHelper {
    private $key;
    private $iv;

    public function __construct($key, $iv) {
        if (strlen($key) !== 32) {
            throw new Exception("❌ المفتاح (Key) لازم يكون 32 بايت.");
        }
        if (strlen($iv) !== 16) {
            throw new Exception("❌ الـ IV لازم يكون 16 بايت.");
        }

        $this->key = $key;
        $this->iv = $iv;
    }

    private function addPadding($data, $blockSize = 16) {
        $pad = $blockSize - (strlen($data) % $blockSize);
        return $data . str_repeat(chr($pad), $pad);
    }

    private function removePadding($data) {
        $pad = ord($data[strlen($data) - 1]);
        return substr($data, 0, -$pad);
    }

    public function encryptData($plainText) {
        $plainText = mb_convert_encoding($plainText, 'UTF-8');
        $paddedText = $this->addPadding($plainText);
        $encrypted = openssl_encrypt($paddedText, 'AES-256-CBC', $this->key, OPENSSL_RAW_DATA, $this->iv);
        return base64_encode($encrypted);
    }

    public function decryptData($encryptedText) {
        $decoded = base64_decode($encryptedText);
        $decrypted = openssl_decrypt($decoded, 'AES-256-CBC', $this->key, OPENSSL_RAW_DATA, $this->iv);
        return $this->removePadding($decrypted);
    }
}

$key = getenv('keyOfApp');
$iv = getenv('initializationVector');

echo "Key Length: " . strlen($key) . PHP_EOL;
echo "IV Length: " . strlen($iv) . PHP_EOL;

$encryptionHelper = new EncryptionHelper($key, $iv);
$storedHash = '$2y$10$cM9AJ.EJyX1zj8zReTw8CO.Rcr6XW.8njmHeezEqsv4OlEWyHHA4S';
$userProvidedPassword = 'unknown'; // This would come from the user input

if (password_verify($userProvidedPassword, $storedHash)) {
    echo "🔹  password_verify: Password is correct." . PHP_EOL;
} else {
    echo "🔹  password_verify: Incorrect password." . PHP_EOL;
}

$plainText = "unknown";
$encryptedText = $encryptionHelper->encryptData($plainText);
$decryptedText = $encryptionHelper->decryptData($encryptedText);

echo "🔹 Original Text: $plainText" . PHP_EOL;
echo "🔹 Encrypted Text: $encryptedText" . PHP_EOL;
echo "🔹 Decrypted Text: $decryptedText" . PHP_EOL;