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import os
import requests
import json
import gradio as gr
import re

# Hugging Face ํ™˜๊ฒฝ ๋ณ€์ˆ˜๋กœ๋ถ€ํ„ฐ RapidAPI ํ‚ค์™€ ํ˜ธ์ŠคํŠธ ๊ฐ€์ ธ์˜ค๊ธฐ
AA_KEY = os.getenv("AA_KEY")
AA_HOST = "youtube-transcriptor.p.rapidapi.com"

# ์ž๋ง‰ ์–ธ์–ด ์šฐ์„ ์ˆœ์œ„ ๋ฆฌ์ŠคํŠธ 
LANGUAGE_PRIORITY = ['ko', 'en', 'ja', 'zh']

# ์œ ํŠœ๋ธŒ URL์—์„œ ๋น„๋””์˜ค ID๋ฅผ ์ถ”์ถœํ•˜๋Š” ํ•จ์ˆ˜
def get_video_id(youtube_url):
   # ์œ ํŠœ๋ธŒ URL ๋˜๋Š” youtu.be ๋‹จ์ถ• URL์—์„œ video_id ์ถ”์ถœ
   video_id_match = re.search(r"(?<=v=)[^#&?]*", youtube_url) or re.search(r"(?<=youtu.be/)[^#&?]*", youtube_url)
   
   # YouTube Shorts URL ์ฒ˜๋ฆฌ
   if not video_id_match:
       video_id_match = re.search(r"(?<=shorts/)[^#&?]*", youtube_url)
   
   return video_id_match.group(0) if video_id_match else None

# ์œ ํŠœ๋ธŒ ์ž๋ง‰์„ ์š”์ฒญํ•˜๋Š” ํ•จ์ˆ˜ (์–ธ์–ด ์šฐ์„ ์ˆœ์œ„๋ฅผ ์ ์šฉํ•˜์—ฌ ์‹œ๋„)
def get_youtube_transcript(youtube_url):
    try:
        # ๋น„๋””์˜ค ID ์ถ”์ถœ
        video_id = get_video_id(youtube_url)
        if video_id is None:
            return {"error": "์ž˜๋ชป๋œ ์œ ํŠœ๋ธŒ URL์ž…๋‹ˆ๋‹ค."}
        
        url = "https://youtube-transcriptor.p.rapidapi.com/transcript"
        headers = {
            "x-rapidapi-key": AA_KEY,
            "x-rapidapi-host": AA_HOST
        }
        
        # 1. ์šฐ์„ ์ˆœ์œ„ ์–ธ์–ด๋กœ ์‹œ๋„
        for lang in LANGUAGE_PRIORITY:
            querystring = {"video_id": video_id, "lang": lang}
            response = requests.get(url, headers=headers, params=querystring)
            
            if response.status_code == 200:
                data = response.json()
                if data and not isinstance(data, str) and "error" not in data:
                    return {"language": lang, "data": data}
                if isinstance(data, dict) and "availableLangs" in data:
                    available_langs = data["availableLangs"]
                    # 2. ๊ฐ€๋Šฅํ•œ ์–ธ์–ด๊ฐ€ ์žˆ๋‹ค๋ฉด ํ•ด๋‹น ์–ธ์–ด๋กœ ์‹œ๋„
                    for available_lang in available_langs:
                        querystring = {"video_id": video_id, "lang": available_lang}
                        response = requests.get(url, headers=headers, params=querystring)
                        if response.status_code == 200:
                            data = response.json()
                            if data and not isinstance(data, str) and "error" not in data:
                                return {"language": available_lang, "data": data}
        
        # 3. ๋ชจ๋“  ์‹œ๋„ ์‹คํŒจ์‹œ
        return {"error": "์ž๋ง‰์„ ์ฐพ์„ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค."}
        
    except Exception as e:
        return {"error": "์ž๋ง‰์„ ๋ถˆ๋Ÿฌ์˜ค๋Š”๋ฐ ์‹คํŒจํ–ˆ์Šต๋‹ˆ๋‹ค."}

# Gradio ์ธํ„ฐํŽ˜์ด์Šค ํ•จ์ˆ˜
def youtube_transcript_interface(youtube_url):
    transcript_data = get_youtube_transcript(youtube_url)
    return json.dumps(transcript_data, ensure_ascii=False, indent=2)

# Gradio ์ธํ„ฐํŽ˜์ด์Šค ์ƒ์„ฑ
interface = gr.Interface(
   fn=youtube_transcript_interface,
   inputs="text",
   outputs="text",
   title="YouTube ์ž๋ง‰ ์ถ”์ถœ๊ธฐ",
   description="์œ ํŠœ๋ธŒ URL์„ ์ž…๋ ฅํ•˜์„ธ์š”."
)

# Gradio ์ธํ„ฐํŽ˜์ด์Šค ์‹คํ–‰
interface.launch()