import re
import requests
import tempfile
import subprocess
import urllib.request

def parseRedditVideo(link: str, outPath: str):
    response = requests.get(url=link, headers = {'User-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0'})
    json = response.json()
    isVideo = json[0]['data']['children'][0]['data']['is_video']
    if not isVideo: return
    mpdListLink = json[0]['data']['children'][0]['data']['media']['reddit_video']['dash_url']
    mpdResponse = requests.get(url=mpdListLink, headers = {'User-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0'})
    mpdXMLData = mpdResponse.text


    baseLink = json[0]['data']['children'][0]['data']['url']
    reSearchData = re.findall('<BaseURL>(.*?)</BaseURL>', mpdXMLData)

    highestVideoQualityFullLink = reSearchData[0]
    audioPartialLink = reSearchData[-1]

    highestVideoQualityFullLink = baseLink + '/' + highestVideoQualityFullLink
    audioFullLink = baseLink + '/' + audioPartialLink

    tempDir = tempfile.gettempdir()
    tempVideoFilepath = tempDir + '\\' +  next(tempfile._get_candidate_names())
    tempAudioFilepath = tempDir + '\\' +  next(tempfile._get_candidate_names())

    urllib.request.urlretrieve(highestVideoQualityFullLink, tempVideoFilepath)
    urllib.request.urlretrieve(audioFullLink, tempAudioFilepath)


    ffmpegJoiningCommand = f"ffmpeg -i \"{tempVideoFilepath}\" -i \"{tempAudioFilepath}\" -c copy \"{outPath}\""

    subprocess.call(ffmpegJoiningCommand, shell=True)



def main(): 
    #Example
    link = "https://www.reddit.com/r/Animemes/comments/d5ga6a/sign_memes_are_now_banned/.json"
    parseRedditVideo(link,"G:\\out.mkv")

main()