Ai fix

includes/ai.php

@@ -138,10 +138,38 @@ function fociz_ai_chat_gemini(array $messages, array $options, array $aiSettings
         $payload['generationConfig']['responseMimeType'] = 'application/json';
     }
 
-    // Geef de sleutel zowel in de URL (?key=) als in de x-goog-api-key header mee voor proxy-ondersteuning
+    $cleanModel = preg_replace('#^models/#', '', $model);
-    $endpoint = "https://generativelanguage.googleapis.com/v1beta/models/{$model}:generateContent?key=" . urlencode($apiKey);
 
-    $response = fociz_http_request($endpoint, [
+    // Bepaal fallback volgorde van endpoints/versies voor maximale compatibiliteit met alle Google AI Studio accounts
+    $candidateUrls = [];
+    if (str_contains($cleanModel, '1.5-flash')) {
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash-latest:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1/models/gemini-1.5-flash:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash-001:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash-002:generateContent";
+    } elseif (str_contains($cleanModel, '1.5-pro')) {
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1/models/gemini-1.5-pro:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-pro-latest:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-pro:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-pro-001:generateContent";
+    } elseif (str_contains($cleanModel, '2.0-flash')) {
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash-exp:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1/models/gemini-2.0-flash:generateContent";
+    } else {
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/{$cleanModel}:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1/models/{$cleanModel}:generateContent";
+        $candidateUrls[] = "https://generativelanguage.googleapis.com/v1beta/models/{$cleanModel}-latest:generateContent";
+    }
+
+    $response = null;
+    $lastError = null;
+    $successfulModel = $cleanModel;
+
+    foreach ($candidateUrls as $baseUrl) {
+        $endpoint = $baseUrl . '?key=' . urlencode($apiKey);
+        $res = fociz_http_request($endpoint, [
             'method'  => 'POST',
             'headers' => [
                 'Content-Type'   => 'application/json',
@@ -151,7 +179,85 @@ function fociz_ai_chat_gemini(array $messages, array $options, array $aiSettings
             'timeout' => 20,
         ]);
 
-    if ($response['status'] !== 200 || empty($response['json']['candidates'][0]['content']['parts'][0]['text'])) {
+        if ($res['status'] === 200 && !empty($res['json']['candidates'][0]['content']['parts'][0]['text'])) {
+            $response = $res;
+            if (preg_match('#/models/([^:]+)#', $baseUrl, $mName)) {
+                $successfulModel = $mName[1];
+            }
+            break;
+        }
+
+        // Als het een model-not-found 404 fout is, probeer de volgende kandidaat
+        $msg = $res['json']['error']['message'] ?? ($res['error'] ?? '');
+        $lastError = $msg;
+        if ($res['status'] === 404 || str_contains($msg, 'not found') || str_contains($msg, 'not supported')) {
+            continue;
+        }
+
+        // Bij andere fouten (zoals ongeldige sleutel 400/403) direct stoppen
+        $response = $res;
+        break;
+    }
+
+    // Als alle directe kandidaten een 404 gaven, probeer dynamisch via ListModels een passend gemini model te vinden
+    if (!$response && ($lastError && (str_contains($lastError, 'not found') || str_contains($lastError, 'not supported')))) {
+        $listUrl = "https://generativelanguage.googleapis.com/v1beta/models?key=" . urlencode($apiKey);
+        $listRes = fociz_http_request($listUrl, [
+            'method'  => 'GET',
+            'headers' => ['x-goog-api-key' => $apiKey],
+            'timeout' => 10,
+        ]);
+
+        if ($listRes['status'] === 200 && !empty($listRes['json']['models'])) {
+            $availModels = [];
+            foreach ($listRes['json']['models'] as $mItem) {
+                $mMethods = $mItem['supportedGenerationMethods'] ?? [];
+                if (in_array('generateContent', $mMethods, true)) {
+                    $mClean = preg_replace('#^models/#', '', $mItem['name'] ?? '');
+                    if ($mClean) $availModels[] = $mClean;
+                }
+            }
+
+            // Zoek een passend gemini model
+            $fallbackModel = null;
+            foreach ($availModels as $am) {
+                if (str_contains($am, 'flash')) {
+                    $fallbackModel = $am;
+                    break;
+                }
+            }
+            if (!$fallbackModel) {
+                foreach ($availModels as $am) {
+                    if (str_contains($am, 'gemini')) {
+                        $fallbackModel = $am;
+                        break;
+                    }
+                }
+            }
+
+            if ($fallbackModel) {
+                $dynEndpoint = "https://generativelanguage.googleapis.com/v1beta/models/{$fallbackModel}:generateContent?key=" . urlencode($apiKey);
+                $dynRes = fociz_http_request($dynEndpoint, [
+                    'method'  => 'POST',
+                    'headers' => [
+                        'Content-Type'   => 'application/json',
+                        'x-goog-api-key' => $apiKey,
+                    ],
+                    'body'    => $payload,
+                    'timeout' => 20,
+                ]);
+
+                if ($dynRes['status'] === 200 && !empty($dynRes['json']['candidates'][0]['content']['parts'][0]['text'])) {
+                    $response = $dynRes;
+                    $successfulModel = $fallbackModel;
+                } else {
+                    $response = $dynRes;
+                }
+            }
+        }
+    }
+
+    if (!$response || $response['status'] !== 200 || empty($response['json']['candidates'][0]['content']['parts'][0]['text'])) {
         $errMsg = null;
         if (!empty($response['json']['error']['message'])) {
             $errMsg = $response['json']['error']['message'];
@@ -160,7 +266,7 @@ function fociz_ai_chat_gemini(array $messages, array $options, array $aiSettings
         } elseif (!empty($response['body'])) {
             $errMsg = "Gemini fout (HTTP {$response['status']}): " . strip_tags(substr((string)$response['body'], 0, 200));
         } else {
-            $errMsg = "Gemini API aanroep mislukt (HTTP {$response['status']})";
+            $errMsg = $lastError ?: "Gemini API aanroep mislukt";
         }
         error_log("fociz_ai_chat_gemini fout: {$errMsg}");
         return [
@@ -191,7 +297,7 @@ function fociz_ai_chat_gemini(array $messages, array $options, array $aiSettings
         'success'  => true,
         'content'  => $cleanContent,
         'json'     => $parsedJson,
-        'model'    => $model,
+        'model'    => $successfulModel,
         'provider' => 'gemini',
     ];
 }