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import os
import tempfile
import gradio as gr
import re
import sys
import shutil

# Try to import required packages with error handling
try:
    from yt_dlp import YoutubeDL
    YT_DLP_AVAILABLE = True
except ImportError as e:
    YT_DLP_AVAILABLE = False
    print(f"yt-dlp import error: {e}")

try:
    import whisper
    WHISPER_AVAILABLE = True
except ImportError as e:
    WHISPER_AVAILABLE = False
    print(f"whisper import error: {e}")

print(f"Python version: {sys.version}")
print(f"yt-dlp available: {YT_DLP_AVAILABLE}")
print(f"whisper available: {WHISPER_AVAILABLE}")

def download_audio(url, cookies_file_path=None):
    """Download audio from YouTube URL and return the file path"""
    if not YT_DLP_AVAILABLE:
        raise Exception("yt-dlp is not available. Please check the installation.")
    
    try:
        # Create a temporary directory for downloads
        temp_dir = tempfile.mkdtemp()
        output_path = os.path.join(temp_dir, "audio")
        
        ydl_opts = {
            'format': 'bestaudio[ext=m4a]/bestaudio/best',
            'outtmpl': output_path + '.%(ext)s',
            'quiet': True,
            'no_warnings': True,
        }
        
        # Add cookies file if provided
        if cookies_file_path and os.path.exists(cookies_file_path):
            ydl_opts['cookiefile'] = cookies_file_path
            print(f"Using cookies file: {cookies_file_path}")
        
        with YoutubeDL(ydl_opts) as ydl:
            info_dict = ydl.extract_info(url, download=True)
            filename = ydl.prepare_filename(info_dict)
            
            # Find the downloaded file
            for ext in ['.m4a', '.webm', '.mp4', '.mp3']:
                potential_file = output_path + ext
                if os.path.exists(potential_file):
                    return potential_file
            
            raise FileNotFoundError(f"Downloaded audio file not found")
                
    except Exception as e:
        raise Exception(f"Failed to download audio: {str(e)}")

def transcribe_audio(file_path):
    """Transcribe audio file using Whisper"""
    if not WHISPER_AVAILABLE:
        raise Exception("OpenAI Whisper is not available. Please check the installation.")
    
    try:
        # Use the smallest model to reduce memory usage
        model = whisper.load_model("tiny")
        result = model.transcribe(file_path)
        return result["text"]
    except Exception as e:
        raise Exception(f"Failed to transcribe audio: {str(e)}")

def extract_stock_info_simple(text):
    """Extract stock information using simple pattern matching"""
    try:
        stock_info = []
        
        # Simple patterns to look for stock-related information
        stock_patterns = [
            r'\b[A-Z]{1,5}\b(?:\s+stock|\s+shares|\s+symbol)',  # Stock symbols
            r'(?:buy|sell|target|price)\s+[A-Z]{1,5}',
            r'\$\d+(?:\.\d{2})?',  # Dollar amounts
            r'\b(?:bullish|bearish|buy|sell|hold)\b',
        ]
        
        # Look for company names and stock mentions
        companies = re.findall(r'\b[A-Z][a-z]+(?:\s+[A-Z][a-z]+)*(?:\s+(?:Inc|Corp|Company|Ltd)\.?)?', text)
        symbols = re.findall(r'\b[A-Z]{2,5}\b', text)
        prices = re.findall(r'\$\d+(?:\.\d{2})?', text)
        actions = re.findall(r'\b(?:buy|sell|hold|bullish|bearish|target|stop\s+loss)\b', text, re.IGNORECASE)
        
        # Format the extracted information
        result = "=== EXTRACTED STOCK INFORMATION ===\n\n"
        
        if companies:
            result += f"πŸ“Š Mentioned Companies: {', '.join(set(companies[:10]))}\n\n"
        
        if symbols:
            result += f"πŸ”€ Potential Stock Symbols: {', '.join(set(symbols[:10]))}\n\n"
        
        if prices:
            result += f"πŸ’° Price Mentions: {', '.join(set(prices[:10]))}\n\n"
        
        if actions:
            result += f"πŸ“ˆ Trading Actions: {', '.join(set(actions[:10]))}\n\n"
        
        # Look for specific recommendation patterns
        recommendations = []
        sentences = text.split('.')
        for sentence in sentences:
            if any(word in sentence.lower() for word in ['buy', 'sell', 'target', 'recommendation']):
                if any(symbol in sentence for symbol in symbols[:5]):
                    recommendations.append(sentence.strip())
        
        if recommendations:
            result += "🎯 Potential Recommendations:\n"
            for rec in recommendations[:5]:
                result += f"β€’ {rec}\n"
        
        if not any([companies, symbols, prices, actions]):
            result += "⚠️ No clear stock recommendations found in the transcript.\n"
            result += "This might be because:\n"
            result += "β€’ The video doesn't contain stock recommendations\n"
            result += "β€’ The audio quality was poor\n"
            result += "β€’ The content is not in English\n"
        
        return result
        
    except Exception as e:
        return f"Error extracting stock info: {str(e)}"

def cleanup_file(file_path):
    """Clean up temporary files"""
    try:
        if file_path and os.path.exists(file_path):
            os.remove(file_path)
            # Also try to remove the directory if it's empty
            try:
                os.rmdir(os.path.dirname(file_path))
            except:
                pass
    except:
        pass

def process_cookies_file(cookies_file):
    """Process uploaded cookies file and return the path"""
    if cookies_file is None:
        return None
    
    try:
        # Create a temporary file for cookies
        temp_cookies_path = tempfile.mktemp(suffix='.txt')
        
        # Copy the uploaded file to temp location
        shutil.copy2(cookies_file.name, temp_cookies_path)
        
        return temp_cookies_path
    except Exception as e:
        print(f"Error processing cookies file: {e}")
        return None

def process_video(url, cookies_file, progress=gr.Progress()):
    """Main function to process YouTube video"""
    
    # Check if required packages are available
    if not YT_DLP_AVAILABLE:
        return "Error: yt-dlp is not installed properly. Please check the requirements.", "", "❌ Error: Missing yt-dlp"
    
    if not WHISPER_AVAILABLE:
        return "Error: OpenAI Whisper is not installed properly. Please check the requirements.", "", "❌ Error: Missing Whisper"
    
    if not url or not url.strip():
        return "Please provide a valid YouTube URL", "", "❌ Error: Invalid URL"
    
    audio_path = None
    cookies_temp_path = None
    
    try:
        # Validate URL
        if not any(domain in url.lower() for domain in ['youtube.com', 'youtu.be']):
            return "Please provide a valid YouTube URL", "", "❌ Error: Invalid URL"
        
        # Process cookies file if provided
        progress(0.05, desc="Processing cookies...")
        cookies_temp_path = process_cookies_file(cookies_file)
        
        status_msg = "βœ… Cookies loaded" if cookies_temp_path else "⚠️ No cookies (may encounter bot detection)"
        
        # Download audio
        progress(0.2, desc="Downloading audio...")
        audio_path = download_audio(url, cookies_temp_path)
        
        # Transcribe audio
        progress(0.6, desc="Transcribing audio...")
        transcript = transcribe_audio(audio_path)
        
        if not transcript.strip():
            return "No speech detected in the video", "", "❌ No speech detected"
        
        # Extract stock information
        progress(0.9, desc="Extracting stock information...")
        stock_details = extract_stock_info_simple(transcript)
        
        progress(1.0, desc="Complete!")
        return transcript, stock_details, "βœ… Processing completed successfully"
        
    except Exception as e:
        error_msg = f"Error processing video: {str(e)}"
        return error_msg, "", f"❌ Error: {str(e)}"
    
    finally:
        # Clean up temporary files
        cleanup_file(audio_path)
        cleanup_file(cookies_temp_path)

# Create Gradio interface
with gr.Blocks(
    title="Stock Recommendation Extractor",
    theme=gr.themes.Soft(),
    css="""
    .gradio-container {
        max-width: 1400px;
        margin: auto;
    }
    .status-box {
        padding: 10px;
        border-radius: 5px;
        margin: 10px 0;
    }
    """
) as demo:
    
    gr.Markdown("""
    # πŸ“ˆ Stock Recommendation Extractor from YouTube
    
    Extract stock recommendations and trading information from YouTube videos using AI transcription.
    
    **How it works:**
    1. Upload your cookies.txt file (optional but recommended to avoid bot detection)
    2. Paste YouTube video URL
    3. Downloads audio from YouTube video
    4. Transcribes using OpenAI Whisper
    5. Extracts stock-related information
    
    **⚠️ Disclaimer:** This is for educational purposes only. Always do your own research!
    """)
    
    with gr.Row():
        with gr.Column(scale=1):
            # Cookies file upload
            cookies_input = gr.File(
                label="πŸͺ Upload Cookies File (cookies.txt)",
                file_types=[".txt"],
                file_count="single"
            )
            
            gr.Markdown("""
            **How to get cookies.txt:**
            1. Install browser extension like "Get cookies.txt LOCALLY"
            2. Visit YouTube in your browser (logged in)
            3. Export cookies for youtube.com
            4. Upload the downloaded cookies.txt file here
            """)
            
            url_input = gr.Textbox(
                label="πŸ“Ί YouTube URL",
                placeholder="https://www.youtube.com/watch?v=...",
                lines=2
            )
            
            process_btn = gr.Button(
                "πŸš€ Extract Stock Information", 
                variant="primary",
                size="lg"
            )
            
            # Status display
            status_output = gr.Textbox(
                label="πŸ“Š Status",
                lines=1,
                interactive=False
            )
            
            gr.Markdown("""
            ### πŸ’‘ Tips:
            - Upload cookies.txt to avoid bot detection
            - Works best with financial YouTube channels
            - Ensure video has clear audio
            - English content works best
            """)
    
    with gr.Row():
        with gr.Column():
            transcript_output = gr.Textbox(
                label="πŸ“ Full Transcript",
                lines=15,
                max_lines=20,
                show_copy_button=True
            )
        
        with gr.Column():
            stock_info_output = gr.Textbox(
                label="πŸ“Š Extracted Stock Information",
                lines=15,
                max_lines=20,
                show_copy_button=True
            )
    
    # Event handlers
    process_btn.click(
        fn=process_video,
        inputs=[url_input, cookies_input],
        outputs=[transcript_output, stock_info_output, status_output],
        show_progress=True
    )
    
    # Example section
    gr.Markdown("### πŸ“‹ Example URLs (Replace with actual financial videos)")
    gr.Examples(
        examples=[
            ["https://www.youtube.com/watch?v=dQw4w9WgXcQ"],
        ],
        inputs=[url_input],
        label="Click to try example"
    )
    
    gr.Markdown("""
    ### πŸ”§ Troubleshooting:
    - **Bot Detection Error**: Upload your cookies.txt file
    - **No Audio Found**: Check if video has audio track
    - **Transcription Failed**: Video might be too long or audio quality poor
    - **No Stock Info**: Video might not contain financial content
    """)

if __name__ == "__main__":
    demo.launch()