import json
import os
import tempfile

import urllib3

import time


def send_open_door_request(host, username, password):
    urllib3.PoolManager().request(
        "GET",
        f"http://{host}/local/Doorcom/door.cgi?r=1",
        headers=urllib3.make_headers(basic_auth=f"{username}:{password}"),
    )


def get_ring_status(host, username, password):
    response = urllib3.PoolManager().request(
        "GET",
        f"http://{host}/local/Doorcom/monitor.cgi?ring=1",
        headers=urllib3.make_headers(basic_auth=f"{username}:{password}"),
        preload_content=False,
        decode_content=True,
    )

    while True:
        line = response.readline()
        if line != b"--ioboundary\r\n":
            continue
        header = response.readline()
        if header != b"Content-Type: text/plain\r\n":
            continue
        if response.readline() != b"\r\n":
            continue
        data = []
        while True:
            line = response.readline()
            if line != b"\r\n":
                data.append(line.decode().rstrip())
            else:
                if data:
                    yield data
                break


def read_file_contents(file_name):
    with open(file_name, "r", encoding="utf-8") as f:
        return f.read()


def open_door():
    with open(
        "/etc/myintercom-doorbell/settings.json", "r", encoding="utf-8"
    ) as config_file:
        config = json.load(config_file)

    send_open_door_request(
        host=config["host"],
        username=config["username"],
        password=read_file_contents(config["passwordFile"]),
    )


def poll():
    outgoing_dir = "/var/spool/asterisk/outgoing/"

    with open(
        "/etc/myintercom-doorbell/settings.json", "r", encoding="utf-8"
    ) as config_file:
        config = json.load(config_file)

    audiosocket = f"{config['audiosocket']['address']}:{config['audiosocket']['port']}/{config['audiosocket']['uuid']}"
    callfile_content = (
        f"Channel: Audiosocket/{audiosocket}\n"
        "Context: doorbell\n"
        f"CallerID: {config['callerId']}\n"
        "Extension: s\n"
        "Priority: 1\n"
    )

    while True:
        for status in get_ring_status(
            host=config["host"],
            username=config["username"],
            password=read_file_contents(config["passwordFile"]),
        ):
            if status == ["1:H"]:
                print("ringing", flush=True)
                with tempfile.NamedTemporaryFile(dir="/var/tmp", mode="w") as f:
                    f.write(callfile_content)
                    os.chmod(f.name, 0o644)
                    os.link(
                        f.name, os.path.join(outgoing_dir, os.path.basename(f.name))
                    )
                time.sleep(config["dialTime"])
            else:
                print(".", end="", flush=True)