import os
import uuid
import time
import json
import requests
import soundfile as sf
import gradio as gr
from moviepy import VideoFileClip

ELEVENLABS_API_KEY = os.environ.get('ELEVENLABS_API_KEY', '')

def extract_audio(video_path, output_format="mp3"):

    if not video_path:
        return None, "No video provided"
    
    output_path = f"extracted_audio_{uuid.uuid4().hex[:8]}.{output_format}"
    
    try:
        video = VideoFileClip(video_path)
        video.audio.write_audiofile(output_path, logger=None)
        video.close()
        return output_path, f"Audio extracted successfully"
    except Exception as e:
        return None, f"Error extracting audio: {str(e)}"

def transcribe_with_scribe(audio_path, api_key, model_id="scribe_v1"):
    start_time = time.time()
    
    if not api_key:
        return {"error": "Please provide an API key"}
    
    url = "https://api.elevenlabs.io/v1/speech-to-text"
    headers = {
        "xi-api-key": api_key
    }
    
    try:
        with open(audio_path, "rb") as f:
            files = {
                "file": f,
                "model_id": (None, model_id)
            }
            response = requests.post(url, headers=headers, files=files)
            response.raise_for_status()
            result = response.json()
    except requests.exceptions.RequestException as e:
        return {"error": f"API request failed: {str(e)}"}
    except json.JSONDecodeError:
        return {"error": "Failed to parse API response"}
    
    end_time = time.time()
    processing_time = end_time - start_time
    
    file_size = os.path.getsize(audio_path) / (1024 * 1024)
    
    try:
        audio_data, sample_rate = sf.read(audio_path)
        audio_duration = len(audio_data) / sample_rate
    except:
        try:
            import librosa
            audio_duration = librosa.get_duration(filename=audio_path)
        except:
            audio_duration = 0
    
    text = result.get('text', '')
    
    return {
        "service": "Scribe",
        "text": text,
        "processing_time": processing_time,
        "file_size_mb": file_size,
        "audio_duration": audio_duration,
        "real_time_factor": processing_time / audio_duration if audio_duration > 0 else None,
        "processing_speed": audio_duration / processing_time if audio_duration > 0 else None,
        "raw_response": result
    }

def save_transcription(transcription):
    if "error" in transcription:
        return None, transcription["error"]
    
    transcript_filename = f"transcription_{uuid.uuid4().hex[:8]}.txt"
    
    try:
        with open(transcript_filename, "w", encoding="utf-8") as f:
            f.write(transcription.get('text', 'No text found'))
        return transcript_filename, "Transcription saved as text file"
    except Exception as e:
        return None, f"Error saving transcription: {str(e)}"

def process_video_file(video_input, output_format, api_key, model_id):

    audio_output, audio_status = extract_audio(video_input, output_format)
    
    if not audio_output:
        return None, audio_status, None, audio_status
    
    transcription = transcribe_with_scribe(audio_output, api_key, model_id)
    
    transcript_file, transcript_status = save_transcription(transcription)
    
    try:
        os.remove(audio_output)
    except Exception:
        pass
    
    return audio_output, audio_status, transcript_file, transcript_status

def create_interface():
    with gr.Blocks(title="Video to Audio to Transcription") as app:
        gr.Markdown("# Video => Audio => Transcription")
        
        with gr.Row():
            api_key = gr.Textbox(
                placeholder="Enter your ElevenLabs API key", 
                label="ElevenLabs API Key", 
                type="password", 
                value=ELEVENLABS_API_KEY
            )
            model_id = gr.Dropdown(
                choices=["scribe_v1"], 
                value="scribe_v1", 
                label="Transcription Model"
            )
        
        with gr.Tabs():
            with gr.TabItem("Upload Video"):
                with gr.Row():
                    with gr.Column():
                        video_input = gr.Video(label="Upload Video")
                        format_choice_file = gr.Radio(
                            ["mp3"], 
                            value="mp3", 
                            label="Output Format"
                        )
                        extract_button_file = gr.Button("Extract Audio & Transcribe")
                    
                    with gr.Column():
                        audio_output_file = gr.Audio(label="Extracted Audio", type="filepath")
                        status_output_file = gr.Textbox(label="Audio Extraction Status")
                        transcript_file_output = gr.File(label="Transcription Text File")
                        transcript_status_output = gr.Textbox(label="Transcription Status")
                
                extract_button_file.click(
                    fn=process_video_file, 
                    inputs=[video_input, format_choice_file, api_key, model_id], 
                    outputs=[
                        audio_output_file, 
                        status_output_file, 
                        transcript_file_output, 
                        transcript_status_output
                    ]
                )
        
        return app

def main():
    app = create_interface()
    app.launch()

if __name__ == "__main__":
    main()