import vfetcher
import vobjects
import urllib.parse
import json
import subprocess
import os
import shlex


def audio_list(config):
    payload = config.audio_list_payload()
    json_list = vfetcher.fetch(
        payload["method"],
        f"{config.vk_host()}{config.audio_list_url()}",
        payload["headers"].items(),
        payload["body"].encode(),
    )
    plain_list = json.loads(json_list)
    return vobjects.audio_list(plain_list)


def audio_data(config, audio_list):
    payload = config.audio_data_payload()
    body = {
        "al": "1",
        "audio_ids": ",".join([audio.cid() for audio in audio_list]),
    }
    json_data = vfetcher.fetch(
        payload["method"],
        f"{config.vk_host()}{config.audio_data_url()}",
        payload["headers"].items(),
        urllib.parse.urlencode(body).encode("ascii"),
    )
    plain_data = json.loads(json_data.decode("windows-1251"))
    return vobjects.audio_data(plain_data)


def audio_manifest(config, audio_data):
    body = {}
    raw_content = vfetcher.fetch(
        "GET",
        audio_data.blessed_url(config),
        {}.items(),
        urllib.parse.urlencode(body).encode(),
    )
    return vobjects.Manifest(raw_content)


def audio_chunk(config, audio_data, chunk):
    body = {}
    manifest = audio_data.manifest()
    raw_data = vfetcher.fetch(
        "GET",
        f"{audio_data.root_url(config)}{chunk}",
        {}.items(),
        urllib.parse.urlencode(body).encode("utf-8"),
    )
    return vobjects.Chunk(manifest, chunk, raw_data)


def audio(config, audio_manifest, idx=None):
    data = audio_manifest.data()
    audio_dir = config.audio_directory()
    if not os.path.exists(audio_dir):
        os.makedirs(audio_dir)
    subprocess.run(
        [
            f'ffmpeg -y -protocol_whitelist file,http,https,tcp,tls,crypto -allowed_extensions ALL -i {audio_manifest.index(config)} -metadata title={shlex.quote(data.title())} -metadata artist={shlex.quote(data.artist())} -metadata track={idx} {shlex.quote(data.findex(config))}',
        ],
        shell=True,
        stdout=subprocess.DEVNULL,
        stderr=subprocess.DEVNULL,
    )