fix: Create Albert-specific model clients for OpenAI-compatible API

- Add GPTModelClient and EmbeddingsModelClient for Albert with configurable base URL
- Update PlatformFactory to use Albert-specific clients instead of OpenAI's
- Fix PHPStan errors by using correct Platform class
- Apply code style fixes

Author: OskarStark

src/Platform/Bridge/Albert/EmbeddingsModelClient.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpLlm\LlmChain\Platform\Bridge\Albert;
+
+use PhpLlm\LlmChain\Platform\Bridge\OpenAI\Embeddings;
+use PhpLlm\LlmChain\Platform\Model;
+use PhpLlm\LlmChain\Platform\ModelClientInterface;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Symfony\Contracts\HttpClient\ResponseInterface;
+use Webmozart\Assert\Assert;
+
+/**
+ * Embeddings Model Client for Albert API (OpenAI-compatible).
+ */
+final readonly class EmbeddingsModelClient implements ModelClientInterface
+{
+    public function __construct(
+        private HttpClientInterface $httpClient,
+        #[\SensitiveParameter]
+        private string $apiKey,
+        private string $baseUrl,
+    ) {
+        Assert::stringNotEmpty($apiKey, 'The API key must not be empty.');
+        Assert::stringNotEmpty($baseUrl, 'The base URL must not be empty.');
+    }
+
+    public function supports(Model $model): bool
+    {
+        return $model instanceof Embeddings;
+    }
+
+    public function request(Model $model, array|string $payload, array $options = []): ResponseInterface
+    {
+        return $this->httpClient->request('POST', $this->baseUrl.'embeddings', [
+            'auth_bearer' => $this->apiKey,
+            'json' => array_merge($options, $payload),
+        ]);
+    }
+}

src/Platform/Bridge/Albert/GPTModelClient.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpLlm\LlmChain\Platform\Bridge\Albert;
+
+use PhpLlm\LlmChain\Platform\Bridge\OpenAI\GPT;
+use PhpLlm\LlmChain\Platform\Model;
+use PhpLlm\LlmChain\Platform\ModelClientInterface;
+use Symfony\Component\HttpClient\EventSourceHttpClient;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Symfony\Contracts\HttpClient\ResponseInterface;
+use Webmozart\Assert\Assert;
+
+/**
+ * GPT Model Client for Albert API (OpenAI-compatible).
+ */
+final readonly class GPTModelClient implements ModelClientInterface
+{
+    private EventSourceHttpClient $httpClient;
+
+    public function __construct(
+        HttpClientInterface $httpClient,
+        #[\SensitiveParameter]
+        private string $apiKey,
+        private string $baseUrl,
+    ) {
+        $this->httpClient = $httpClient instanceof EventSourceHttpClient ? $httpClient : new EventSourceHttpClient($httpClient);
+        Assert::stringNotEmpty($apiKey, 'The API key must not be empty.');
+        Assert::stringNotEmpty($baseUrl, 'The base URL must not be empty.');
+    }
+
+    public function supports(Model $model): bool
+    {
+        return $model instanceof GPT;
+    }
+
+    public function request(Model $model, array|string $payload, array $options = []): ResponseInterface
+    {
+        return $this->httpClient->request('POST', $this->baseUrl.'chat/completions', [
+            'auth_bearer' => $this->apiKey,
+            'json' => array_merge($options, $payload),
+        ]);
+    }
+}

src/Platform/Bridge/Albert/PlatformFactory.php

@@ -4,26 +4,42 @@
 
 namespace PhpLlm\LlmChain\Platform\Bridge\Albert;
 
-use PhpLlm\LlmChain\Platform\Bridge\OpenAI\Platform;
-use Symfony\Component\HttpClient\HttpClient;
+use PhpLlm\LlmChain\Platform\Bridge\OpenAI\Embeddings\ResponseConverter as EmbeddingsResponseConverter;
+use PhpLlm\LlmChain\Platform\Bridge\OpenAI\GPT\ResponseConverter as GPTResponseConverter;
+use PhpLlm\LlmChain\Platform\Contract;
+use PhpLlm\LlmChain\Platform\Platform;
+use Symfony\Component\HttpClient\EventSourceHttpClient;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 final class PlatformFactory
 {
     /**
-     * Creates a Platform instance for Albert API.
+     * Creates a Platform instance for Albert API (OpenAI-compatible).
      */
     public static function create(
         string $apiKey,
         string $albertUrl,
         ?HttpClientInterface $httpClient = null,
     ): Platform {
-        $httpClient ??= HttpClient::create();
+        $httpClient = $httpClient instanceof EventSourceHttpClient ? $httpClient : new EventSourceHttpClient($httpClient);
+
+        // Configure base URL for Albert API
+        $baseUrl = rtrim($albertUrl, '/').'/v1/';
+
+        // Create Albert-specific model clients with custom base URL
+        $gptClient = new GPTModelClient($httpClient, $apiKey, $baseUrl);
+        $embeddingsClient = new EmbeddingsModelClient($httpClient, $apiKey, $baseUrl);
 
         return new Platform(
-            $httpClient,
-            $apiKey,
-            rtrim($albertUrl, '/').'/v1/',
+            [
+                $gptClient,
+                $embeddingsClient,
+            ],
+            [
+                new GPTResponseConverter(),
+                new EmbeddingsResponseConverter(),
+            ],
+            Contract::create(),
         );
     }
 }

tests/Platform/Bridge/Albert/PlatformFactoryTest.php

@@ -5,7 +5,7 @@
 namespace PhpLlm\LlmChain\Tests\Platform\Bridge\Albert;
 
 use PhpLlm\LlmChain\Platform\Bridge\Albert\PlatformFactory;
-use PhpLlm\LlmChain\Platform\Bridge\OpenAI\Platform;
+use PhpLlm\LlmChain\Platform\Platform;
 use PHPUnit\Framework\Attributes\CoversClass;
 use PHPUnit\Framework\Attributes\Small;
 use PHPUnit\Framework\Attributes\Test;