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<?php

interface RepositoryInterface
{
  public function getById($id);
  public function getAll();
  public function save($data);
}

class Repository implements RepositoryInterface
{
  protected $db;
  public function __construct($db)
  {
    $this->db = $db;
  }
  public function getById($id)
  {
    // mock implementation to return data
    return ['id' => $id, 'name' => 'Product ' . $id, 'price' => 100.0];
  }
  public function getAll()
  {
    // mock implementation to return all data
    return [['id' => 1, 'name' => 'Product 1', 'price' => 100.0], ['id' => 2, 'name' => 'Product 2', 'price' => 200.0], ['id' => 3, 'name' => 'Product 3', 'price' => 300.0]];
  }
  public function save($data)
  {
    // mock implementation to save data
    echo "Saving data: " . print_r($data, true) . "\n";
  }
}

$repository = new Repository(null);

$productId = 1;
$product = $repository->getById($productId);

echo "Product Information: ";
echo "ID: " . $product['id'] . "\n";
echo "Name: " . $product['name'] . "\n";
echo "Price: " . $product['price'] . "\n";

$allProducts = $repository->getAll();
echo "All Products: \n";
foreach ($allProducts as $p) {
  echo "ID: " . $p['id'] . "\n";
  echo "Name: " . $p['name'] . "\n";
  echo "Price: " . $p['price'] . "\n";
}

$newProduct = ['name' => 'Super Product', 'price' => 99.99];
$repository->save($newProduct);
echo "New product saved successfully!\n";

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