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import os
import re
import shutil
import requests
import gradio as gr
from mutagen.mp3 import MP3
from mutagen.flac import FLAC
from mutagen.id3 import TIT2, TPE1, TALB


def insert_metadata(file_path: str, title, artist, album):
    print(f"The file was successfully downloaded and saved to {file_path}")
    if file_path.endswith(".flac"):
        audio = FLAC(file_path)
        audio["TITLE"] = title
        audio["ARTIST"] = artist
        audio["ALBUM"] = album

    else:
        audio = MP3(file_path)
        try:
            audio.add_tags()
        except Exception as e:
            print(e)

        audio.tags.add(TIT2(encoding=3, text=title))
        audio.tags.add(TPE1(encoding=3, text=artist))
        audio.tags.add(TALB(encoding=3, text=album))

    audio.save()
    print(f"Metadata was successfully inserted into {file_path}")


def download_file(mid: str, url: str, title, artist, album, cache="./__pycache__"):
    if os.path.exists(cache):
        shutil.rmtree(cache)

    os.makedirs(cache)
    local_filename = f"{cache}/{mid}.mp3"
    response = requests.get(url, stream=True)
    if response.status_code == 200:
        with open(local_filename, "wb") as file:
            for chunk in response.iter_content(chunk_size=8192):
                file.write(chunk)

        insert_metadata(local_filename, title, artist, album)
        return local_filename

    else:
        print(f"Download Failure, status code: {response.status_code}")
        return url


def extract_fst_url(text):
    url_pattern = r'(https?://[^\s"]+)'
    match = re.search(url_pattern, text)
    if match:
        return match.group(1)
    else:
        return None


def get_real_url(short_url):
    return requests.get(
        short_url,
        headers={
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36"
        },
        allow_redirects=True,
        timeout=10,
    ).url


def parse_id(url: str):
    if not url:
        return None

    if re.fullmatch(r"^[A-Za-z0-9]{14}$", url):
        return str(url)

    url = extract_fst_url(url)
    if not url:
        return None

    if url.startswith("https://c6.y.qq.com/base/fcgi-bin/"):
        return get_real_url(url).split("songmid=")[1].split("&")[0]

    match = re.search(r"songDetail/([^?]+)", url)
    if match:
        return str(match.group(1))
    else:
        return None


def infer(url: str):
    song = title = song_id = artist = album = quality = size = None
    try:
        song_mid = parse_id(url)
        if not song_mid:
            title = "Please enter a valid URL or mid!"
            return song, title, song_id, artist, album, quality, size

        response = requests.get(
            os.getenv("api"),
            params={"mid": song_mid},
        )

        if response.status_code == 200 and response.json()["code"] == 200:
            data = response.json()["data"]
            song = download_file(
                data["mid"],
                data["urls"][0]["url"],
                data["title"],
                data["author"],
                data["album"],
            )
            title = data["title"]
            song_id = data["id"]
            artist = data["author"]
            album = data["album"]
            quality = data["urls"][0]["type"]
            size = data["urls"][0]["size"]

        else:
            raise Exception(response.json()["msg"])

    except Exception as e:
        title = f"{e}"

    return song, title, song_id, artist, album, quality, size


if __name__ == "__main__":
    gr.Interface(
        fn=infer,
        inputs=[
            gr.Textbox(
                label="Please enter the mid or URL of QQ music song",
                placeholder="https://y.qq.com/n/ryqq/songDetail/*",
            ),
        ],
        outputs=[
            gr.Audio(label="Song download", show_download_button=True),
            gr.Textbox(label="Title", show_copy_button=True),
            gr.Textbox(label="Song ID", show_copy_button=True),
            gr.Textbox(label="Artist", show_copy_button=True),
            gr.Textbox(label="Album", show_copy_button=True),
            gr.Textbox(label="Quality", show_copy_button=True),
            gr.Textbox(label="Size(B)", show_copy_button=True),
        ],
        title="QQ Music Parser",
        description="This site does not provide any audio storage services, only provide the most basic parsing services",
        flagging_mode="never",
        examples=[
            "003N68WJ0mh5jN",
            "https://y.qq.com/n/ryqq/songDetail/003N68WJ0mh5jN",
            "https://c6.y.qq.com/base/fcgi-bin/u?__=VfAFlMiujMhz",
        ],
        cache_examples=False,
    ).launch()