#!/usr/bin/env python3

import subprocess
import time
import requests
import os
import sys

channel_list = []
downloading = []


def download_stream(channel):
    downloading.append(channel)
    # TODO: Output dl-stream to a log file
    subprocess.Popen(
        ["dl-stream", "-r", channel], start_new_session=True, stdout=subprocess.DEVNULL
    )


# Checks if the channel_list exists and if not makes one
if os.path.exists("channel_list.txt"):
    # Grab all the channels from channel_list.txt and put them in a list
    with open("channel_list.txt", "r") as file:
        # channel_list = file.readlines()
        channel_list = [
            line for line in file if line.strip()
        ]  # Removes all white spaces per line
else:
    print("ERROR:'channel_list.txt' does not exist, creating now!")
    with open("channel_list.txt", "w") as file:
        pass  # Writes Nothing
    sys.exit("Please populate the channel_list.txt with one channel per line!")

# Run untill progam is killed
while True:
    # Exits the program if there is no channels to Grab
    if not channel_list:
        sys.exit("Please populate the channel_list.txt with one channel per line!")
    for channel in channel_list:
        channel = channel.strip()
        contents = requests.get("https://www.twitch.tv/" + channel).content.decode(
            "utf-8"
        )
        if "isLiveBroadcast" in contents:
            print(channel + " is live!")
            if channel not in downloading:
                download_stream(channel)
            else:
                print(channel + " is already downloading")
        else:
            print(channel + " is not live.")
            if channel in downloading:
                downloading.remove(channel)
                print(channel + " is no longer downloading")
    time.sleep(60)  # Wait 60 Seconds before trying again