Update app.py

app.py

@@ -1,53 +1,48 @@
 import os, requests, gradio as gr
 
-# 🔗 Hugging Face API bağlantısı
-API_URL = "https://api-inference.huggingface.co/models/mistralai/Mixtral-8x7B-Instruct-v0.1"
+# 🔗 Ana ve yedek modeller
+PRIMARY_URL = "https://api-inference.huggingface.co/models/mistralai/Mixtral-8x7B-Instruct-v0.1"
+FALLBACK_URL = "https://api-inference.huggingface.co/models/meta-llama/Meta-Llama-3-8B-Instruct"
 HF_TOKEN = os.getenv("HF_TOKEN")
 HEADERS = {"Authorization": f"Bearer {HF_TOKEN}"}
 
-# 💬 Ana sohbet fonksiyonu
-def chat(message, history):
-    history = history or []
+def ask_model(url, message):
     payload = {
         "inputs": message,
         "parameters": {"max_new_tokens": 300, "temperature": 0.7},
         "options": {"wait_for_model": True}
     }
-
     try:
-        r = requests.post(API_URL, headers=HEADERS, json=payload, timeout=60)
-
-        try:
-            data = r.json()
-        except ValueError:
-            reply = "⚠️ Model boş yanıt döndürdü veya bağlantı kesildi."
-            history.append((message, reply))
-            return history, history
-
-        # 🔍 Yanıt kontrolü
+        r = requests.post(url, headers=HEADERS, json=payload, timeout=60)
+        data = r.json()
         if isinstance(data, list) and "generated_text" in data[0]:
-            reply = data[0]["generated_text"]
-        else:
-            reply = data.get("generated_text") or data.get("error", "⚠️ Modelden yanıt alınamadı.")
-
-    except Exception as e:
-        reply = f"❌ Hata: {e}"
+            return data[0]["generated_text"]
+        if isinstance(data, dict) and "generated_text" in data:
+            return data["generated_text"]
+        return None
+    except Exception:
+        return None
 
+def chat(message, history):
+    history = history or []
+    reply = ask_model(PRIMARY_URL, message)
+    if not reply:
+        reply = ask_model(FALLBACK_URL, message)
+    if not reply:
+        reply = "⚠️ Şu anda modellerden yanıt alınamadı. Lütfen birkaç saniye sonra tekrar deneyin."
     history.append((message, reply))
     return history, history
 
-
-# 🎨 Tema ve arayüz ayarları
 theme = gr.themes.Soft(primary_hue="blue", neutral_hue="slate").set(
     body_background_fill="#0f172a",
     block_background_fill="#1e293b",
     block_title_text_color="#38bdf8"
 )
 
-with gr.Blocks(theme=theme, title="ZenkaMind v11") as demo:
+with gr.Blocks(theme=theme, title="ZenkaMind v12") as demo:
     gr.Markdown(
-        "<h1 style='text-align:center;color:#38bdf8'>🧠 ZenkaMind v11</h1>"
-        "<p style='text-align:center;color:#94a3b8'>Türkçe yapay zekâ sohbet asistanı — Mixtral 8x7B</p>"
+        "<h1 style='text-align:center;color:#38bdf8'>🧠 ZenkaMind v12</h1>"
+        "<p style='text-align:center;color:#94a3b8'>Türkçe yapay zekâ sohbet asistanı — Mixtral + Llama 3</p>"
     )
 
     chat_ui = gr.Chatbot(height=460, label="ZenkaMind")