Update app.py

app.py

@@ -1,56 +1,52 @@
 import streamlit as st
-import transformers
 from transformers import pipeline
 
-# Load translation pipeline (use your fine-tuned model here later)
-translator = pipeline("translation", model="Helsinki-NLP/opus-mt-en-hi")
+# Language pair to model mapping
+model_mapping = {
+    ("English", "Hindi"): "Helsinki-NLP/opus-mt-en-hi",
+    ("Hindi", "English"): "ai4bharat/indic-translator-hi-en",
+    ("English", "Telugu"): "ai4bharat/indic-translator-en-te",
+    ("Telugu", "English"): "ai4bharat/indic-translator-te-en",
+}
 
 # Streamlit page config
 st.set_page_config(page_title="Translator", layout="wide")
 
-# Language options
-languages = ["English", "Hindi", "Spanish", "Odia", "Telugu"]
+# Only allowed languages
+languages = ["English", "Hindi", "Telugu"]
 
-# UI starts here
+# UI
 st.markdown("""
     <style>
     .big-font { font-size:25px !important; font-weight: bold; }
-    .tab-style { display: flex; gap: 20px; font-size:18px; }
-    .tab-style div { cursor: pointer; }
     .output-box { background-color: #f9f9f9; padding: 20px; border-radius: 10px; min-height: 300px; font-size: 22px; }
-    .copy-button { margin-top: 10px; }
     </style>
 """, unsafe_allow_html=True)
 
-# Create two columns
+# Two columns
 col1, col2 = st.columns(2)
 
 with col1:
-    # Detected Language Dropdown
     source_lang = st.selectbox("Detected Language", languages, index=0)
-    
-    # Text input
     st.markdown('<div class="big-font">Enter your text:</div>', unsafe_allow_html=True)
     user_input = st.text_area("", "hi how are you", height=250)
-    
-    # Translate Button
     translate_button = st.button("Translate", use_container_width=True)
 
 with col2:
-    # Target Language Dropdown
     target_lang = st.selectbox("Translate To", languages, index=1)
     
     if translate_button and user_input:
-        # Right now, not actually changing based on languages selected
-        # You can later map different models based on selected languages
-        translated_text = translator(user_input, max_length=400)[0]['translation_text']
+        if (source_lang, target_lang) in model_mapping:
+            model_name = model_mapping[(source_lang, target_lang)]
+            translator = pipeline("translation", model=model_name)
+            translated_text = translator(user_input, max_length=400)[0]['translation_text']
+        else:
+            translated_text = "❌ Translation not available for selected language pair."
     else:
         translated_text = ""
-    
-    # Show translated text
+
     st.markdown('<div class="output-box">' + (translated_text if translated_text else "") + '</div>', unsafe_allow_html=True)
 
-    # Copy and Paraphrase Buttons
-    if translated_text:
+    if translated_text and "❌" not in translated_text:
         st.button("Copy", use_container_width=True)
         st.button("Paraphrase", use_container_width=True)