#!/usr/bin/env python3
import os
import shutil
import subprocess
import sys
import time
from datetime import datetime

import requests

channel_list = []
downloading = {}


def write_log(channel):
    with open("log.txt", "a") as log:
        line = downloading[channel].stdout.readline()
        if line:
            log.write(line.decode())


def download_stream(channel):
    downloading[channel] = subprocess.Popen(
        ["dl-stream", "-r", channel],
        start_new_session=True,
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
    )
    write_log(channel)


# TODO: Clean things up intp their own method

# Checks if dl-stream is in the systems path
if not shutil.which("dl-stream"):
    sys.exit("ERROR: dl-stream is not found in the systems path!")


# 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
# TODO: Make it so user can kill gracefully
# TODO: This includes all the subprocess too!
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!")
    print("\n------------------------------------")
    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("\033[1m" + channel + "\033[0m is \033[32mlive\033[0m!")
            if channel not in downloading:
                download_stream(channel)
            else:
                print(channel + " is already downloading")
                write_log(channel)
        else:
            print("\033[1m" + channel + "\033[0m is \033[31mnot live\033[0m.")
            if channel in downloading:
                del downloading[channel]
                print(channel + " is no longer downloading")
        time.sleep(1)  # Wait one second before going to next channel
    print("\n\033[3mLast checked: " + datetime.now().strftime("%H:%M:%S") + "\033[0m")
    print("------------------------------------")
    time.sleep(60)  # Wait 60 Seconds before trying again