fix(http-client): improve client configuration handling

* add support for HttpMethodsClient to be used directly without wrapping
* handle different client types (PSR-18, HttpClient) properly by wrapping only
  when needed
* fix client initialization to avoid creating new instances on every call
* add tests for client configuration scenarios
* improve type hints and error messages for invalid client configurations

src/Lib/Configuration.php

@@ -3,6 +3,7 @@
 namespace Typesense\Lib;
 
 use Http\Client\Common\HttpMethodsClient;
+use Http\Client\HttpClient;
 use Http\Discovery\Psr17FactoryDiscovery;
 use Http\Discovery\Psr18ClientDiscovery;
 use Monolog\Handler\StreamHandler;
@@ -56,9 +57,9 @@ class Configuration
     private LoggerInterface $logger;
 
     /**
-     * @var null|ClientInterface
+     * @var HttpMethodsClient|ClientInterface|null
      */
-    private ?ClientInterface $client = null;
+    private $client = null;
 
     /**
      * @var int
@@ -103,8 +104,18 @@ public function __construct(array $config)
         $this->logger   = new Logger('typesense');
         $this->logger->pushHandler(new StreamHandler('php://stdout', $this->logLevel));
 
-        if (true === \array_key_exists('client', $config) && $config['client'] instanceof ClientInterface) {
-            $this->client = $config['client'];
+        if (true === \array_key_exists('client', $config)) {
+            if ($config['client'] instanceof HttpMethodsClient) {
+                $this->client = $config['client'];
+            } elseif ($config['client'] instanceof HttpClient || $config['client'] instanceof ClientInterface) {
+                $this->client = new HttpMethodsClient(
+                    $config['client'],
+                    Psr17FactoryDiscovery::findRequestFactory(),
+                    Psr17FactoryDiscovery::findStreamFactory()
+                );
+            } else {
+                throw new ConfigError('Client must implement PSR-18 ClientInterface or Http\Client\HttpClient');
+            }
         }
     }
 
@@ -216,10 +227,14 @@ public function getLogger(): LoggerInterface
      */
     public function getClient(): ClientInterface
     {
-        return new HttpMethodsClient(
-            $this->client ?? Psr18ClientDiscovery::find(),
-            Psr17FactoryDiscovery::findRequestFactory(),
-            Psr17FactoryDiscovery::findStreamFactory(),
-        );
+        if ($this->client === null) {
+            $discoveredClient = Psr18ClientDiscovery::find();
+            $this->client = new HttpMethodsClient(
+                $discoveredClient,
+                Psr17FactoryDiscovery::findRequestFactory(),
+                Psr17FactoryDiscovery::findStreamFactory()
+            );
+        }
+        return $this->client;
     }
 }

tests/Feature/HttpClientsTest.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace Feature;
+
+use Tests\TestCase;
+use Http\Client\Common\HttpMethodsClient;
+use Http\Discovery\Psr17FactoryDiscovery;
+use Http\Discovery\Psr18ClientDiscovery;
+use Typesense\Exceptions\ConfigError;
+use Symfony\Component\HttpClient\Psr18Client;
+use Typesense\Client;
+use \stdClass;
+
+class HttpClientsTest extends TestCase
+{
+    private array $baseConfig;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->baseConfig = [
+            'api_key' => $_ENV['TYPESENSE_API_KEY'],
+            'nodes' => [[
+                'host' => $_ENV['TYPESENSE_NODE_HOST'],
+                'port' => $_ENV['TYPESENSE_NODE_PORT'],
+                'protocol' => $_ENV['TYPESENSE_NODE_PROTOCOL']
+            ]]
+        ];
+    }
+
+    public function testWorksWithDefaultClient(): void
+    {
+        $client = new Client($this->baseConfig);
+        $response = $client->health->retrieve();
+        $this->assertIsBool($response['ok']);
+    }
+
+    public function testWorksWithPsr18Client(): void
+    {
+        $httpClient = new Psr18Client();
+        $config = array_merge($this->baseConfig, ['client' => $httpClient]);
+
+        $client = new Client($config);
+        $response = $client->health->retrieve();
+        $this->assertIsBool($response['ok']);
+    }
+
+    public function testWorksWithHttpMethodsClient(): void
+    {
+        $httpClient = new HttpMethodsClient(
+            Psr18ClientDiscovery::find(),
+            Psr17FactoryDiscovery::findRequestFactory(),
+            Psr17FactoryDiscovery::findStreamFactory()
+        );
+
+        $config = array_merge($this->baseConfig, ['client' => $httpClient]);
+
+        $client = new Client($config);
+        $response = $client->health->retrieve();
+        $this->assertIsBool($response['ok']);
+    }
+
+    public function testRejectsInvalidClient(): void
+    {
+        $this->expectException(ConfigError::class);
+        $this->expectExceptionMessage('Client must implement PSR-18 ClientInterface or Http\Client\HttpClient');
+
+        $config = array_merge($this->baseConfig, ['client' => new stdClass()]);
+        new Client($config);
+    }
+}