import subprocess
import os
import glob
import shutil
from concurrent.futures import ThreadPoolExecutor

def move_to_unmatched(base_path, lang, audio_exists, subtitle_exists):
    unmatched_path = os.path.join(base_path, "unmatched", lang)
    os.makedirs(unmatched_path, exist_ok=True)
    
    if audio_exists:
        audio_file = glob.glob(f"{base_path}/{lang}.wav")[0]
        shutil.move(audio_file, unmatched_path)
    
    if subtitle_exists:
        subtitle_file = glob.glob(f"{base_path}/{lang}.vtt")[0]
        shutil.move(subtitle_file, unmatched_path)

def download_and_convert_audio(video_url, languages):
    video_id = video_url.split('=')[-1]
    base_path = f"dataset/{video_id}"
    os.makedirs(base_path, exist_ok=True)

    for lang in languages:
        command_download = [
            'yt-dlp',
            '--extract-audio',
            '--audio-format', 'm4a',
            '--write-sub',
            '--sub-langs', lang,
            '--sub-format', 'vtt',
            '--output', f"{base_path}/%(title)s.{lang}.%(ext)s",
            '--format', f'bestaudio[ext=m4a][acodec=mp4a.40.2][language={lang}]',
            video_url
        ]
        subprocess.run(command_download)

        m4a_files = glob.glob(f"{base_path}/*.{lang}.m4a")
        if m4a_files:
            m4a_file = m4a_files[0]
            wav_file = f"{base_path}/{lang}.wav"
            command_convert = ['ffmpeg', '-i', m4a_file, '-acodec', 'pcm_s16le', '-ar', '44100', wav_file]
            subprocess.run(command_convert)
            os.remove(m4a_file)

        vtt_files = glob.glob(f"{base_path}/*.{lang}.vtt")
        if vtt_files:
            vtt_file = vtt_files[0]
            new_vtt_file = f"{base_path}/{lang}.vtt"
            os.rename(vtt_file, new_vtt_file)

        audio_exists = bool(glob.glob(f"{base_path}/{lang}.wav"))
        subtitle_exists = bool(glob.glob(f"{base_path}/{lang}.vtt"))

        if not (audio_exists and subtitle_exists):
            move_to_unmatched(base_path, lang, audio_exists, subtitle_exists)

def process_video(url, languages):
    try:
        download_and_convert_audio(url, languages)
    except Exception as e:
        print(f"Error processing {url}: {e}")

if __name__ == "__main__":
    
    video_urls = []

    with open('urls.txt', 'r') as file:
        video_urls = [line.strip() for line in file if line.strip()]

    languages = ["ar", "es", "fr", "hi", "id", "ja", "ko", "pt", "ru", "th", "tr", "vi", "en"]

    with ThreadPoolExecutor(max_workers=5) as executor:
        futures = [executor.submit(process_video, url, languages) for url in video_urls]
        for future in futures:
            future.result()