Update app.py

app.py

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+import gradio as gr
+import os
+from openai import OpenAI
+
+# Initialize OpenRouter client
+client = OpenAI(
+    base_url="https://openrouter.ai/api/v1",
+    api_key=os.environ.get("OPENROUTER_API_KEY"),
+)
+
+def generate_subject_lines(email_body, tone, num_suggestions):
+    """Generate email subject lines based on content and tone."""
+    
+    if not email_body.strip():
+        return "Please enter email content."
+    
+    # Construct the prompt
+    prompt = f"""Generate {num_suggestions} compelling email subject lines for the following email content.
+
+Tone: {tone}
+
+Email content:
+{email_body}
+
+Requirements:
+- Make them attention-grabbing but not clickbait
+- Keep them under 60 characters when possible
+- Match the {tone} tone
+- Make each one distinct
+
+Provide only the subject lines, numbered 1-{num_suggestions}."""
+
+    try:
+        # Call OpenRouter API with a free model
+        response = client.chat.completions.create(
+            model="google/gemma-2-9b-it:free",  # Free model on OpenRouter
+            messages=[
+                {"role": "user", "content": prompt}
+            ],
+            max_tokens=500,
+            temperature=0.8,
+        )
+        
+        result = response.choices[0].message.content
+        return result
+        
+    except Exception as e:
+        return f"Error: {str(e)}\n\nMake sure your OPENROUTER_API_KEY is set correctly."
+
+# Create Gradio interface
+with gr.Blocks(title="Email Subject Line Generator", theme=gr.themes.Soft()) as demo:
+    gr.Markdown("""
+    # 📧 Smart Email Subject Line Generator
+    
+    Generate compelling subject lines for your emails using AI. Perfect for:
+    - Business emails
+    - Marketing campaigns
+    - Cold outreach
+    - Newsletter titles
+    """)
+    
+    with gr.Row():
+        with gr.Column():
+            email_input = gr.Textbox(
+                label="Email Content",
+                placeholder="Paste your email content here...",
+                lines=10
+            )
+            
+            tone_select = gr.Radio(
+                choices=["Professional", "Friendly", "Urgent", "Casual", "Formal"],
+                label="Tone",
+                value="Professional"
+            )
+            
+            num_select = gr.Slider(
+                minimum=3,
+                maximum=10,
+                value=5,
+                step=1,
+                label="Number of Suggestions"
+            )
+            
+            generate_btn = gr.Button("Generate Subject Lines", variant="primary")
+        
+        with gr.Column():
+            output = gr.Textbox(
+                label="Generated Subject Lines",
+                lines=15,
+                show_copy_button=True
+            )
+    
+    # Example emails
+    gr.Markdown("### 📝 Try These Examples:")
+    gr.Examples(
+        examples=[
+            [
+                "Hi there,\n\nI wanted to reach out about our new productivity tool that's helped over 5,000 teams save 10+ hours per week. We're offering a free 30-day trial for early adopters. Would you be interested in a quick demo?\n\nBest regards",
+                "Professional",
+                5
+            ],
+            [
+                "Hey team,\n\nQuick reminder that our monthly all-hands meeting is tomorrow at 2 PM. We'll be discussing Q4 goals and the new office policy. Please come prepared with questions!\n\nSee you there!",
+                "Friendly",
+                4
+            ],
+        ],
+        inputs=[email_input, tone_select, num_select],
+        label=None
+    )
+    
+    # Connect the button
+    generate_btn.click(
+        fn=generate_subject_lines,
+        inputs=[email_input, tone_select, num_select],
+        outputs=output
+    )
+
+# Launch the app
+if __name__ == "__main__":
+    demo.launch()