app.py

import os
import gradio as gr
import json
from google import genai
from google.genai import types

api_key=os.environ.get("GEMINI_API_KEY")

def generate_video_title(youtube_url,api_key):
    try:
        client = genai.Client(api_key=api_key)

        model = "gemini-2.5-pro"
        contents = [
            types.Content(
                role="user",
                parts=[
                    types.Part(
                        file_data=types.FileData(
                            file_uri=youtube_url,
                            mime_type="video/*",
                        ),
                        video_metadata=types.VideoMetadata(
                            end_offset="5s",
                        ),
                    ),
                    types.Part.from_text(text=""" """),
                ],
            ),
        ]
        generate_content_config = types.GenerateContentConfig(
            thinking_config = types.ThinkingConfig(
                thinking_budget=-1,
            ),
            response_mime_type="application/json",
            response_schema=genai.types.Schema(
                type = genai.types.Type.OBJECT,
                required = ["titel"],
                properties = {
                    "titel": genai.types.Schema(
                        type = genai.types.Type.STRING,
                    ),
                },
            ),
            system_instruction=[
                types.Part.from_text(text="""always answer this question: wie lautet der titel des videos"""),
            ],
        )

        # Collect the streamed response
        response_text = ""
        for chunk in client.models.generate_content_stream(
            model=model,
            contents=contents,
            config=generate_content_config,
        ):
            response_text += chunk.text
        
        # Parse the JSON response to extract the title
        try:
            response_json = json.loads(response_text)
            return response_json.get("titel", "No title generated")
        except json.JSONDecodeError:
            return f"Error parsing response: {response_text}"
            
    except Exception as e:
        return f"Error: {str(e)}"



def create_gradio_interface():
    """Create and return the Gradio interface"""
    
    with gr.Blocks(title="YouTube Video Title Generator", theme=gr.themes.Soft()) as app:
        gr.HTML("<h1 style='text-align: center; color: #2563eb;'>🎬 YouTube Video Title Generator</h1>")
        gr.HTML("<p style='text-align: center; color: #6b7280;'>Analyze YouTube videos and generate titles with AI</p>")
        
        with gr.Row():
            with gr.Column(scale=1):
                
                youtube_url_input = gr.Textbox(
                    label="YouTube Video URL",
                    placeholder="https://www.youtube.com/watch?v=...",
                    lines=2,
                    info="Paste the YouTube video URL here"
                )
                
                with gr.Row():
                    generate_btn = gr.Button("Analyze Video & Generate Title", variant="primary", size="lg")
                    clear_btn = gr.Button("Clear", variant="secondary")
            
            with gr.Column(scale=1):
                output = gr.Textbox(
                    label="Generated Title",
                    placeholder="Your generated video title will appear here...",
                    lines=3,
                    interactive=False
                )
        
        # Event handlers
        generate_btn.click(
            fn=generate_video_title,
            inputs=youtube_url_input,
            outputs=output
        )
        
        clear_btn.click(
            fn=lambda: ("", ""),
            outputs=[youtube_url_input, output]
        )
        
        # Example inputs
        gr.HTML("<h3 style='margin-top: 20px;'>💡 Example YouTube URLs:</h3>")
        examples = gr.Examples(
            examples=[
                ["https://www.youtube.com/watch?v=dQw4w9WgXcQ"],
                ["https://youtu.be/dQw4w9WgXcQ"],
                ["https://www.youtube.com/watch?v=example123"]
            ],
            inputs=youtube_url_input,
            label="Click on any example to try it out:"
        )
        
        # Instructions
        with gr.Accordion("📋 Instructions", open=False):
            gr.Markdown("""
            ### Supported URL formats:
            - `https://www.youtube.com/watch?v=VIDEO_ID`
            - `https://youtu.be/VIDEO_ID`
            - YouTube playlist URLs (will analyze the first video)
            """)
    
    return app

if __name__ == "__main__":
    # Create and launch the Gradio app
    app = create_gradio_interface()
    
    # Launch with sharing enabled - set to False for local use only
    app.launch(
        share=True,  # Set to False if you don't want to create a public link
        server_name="0.0.0.0",  # Allow access from other devices on your network
        server_port=7860,  # Default Gradio port
        show_api=True  # Show API documentation
    )