import os, sys
from json import loads
from asyncio_dvrip import DVRIPCam
import asyncio
from nvr_core import NVR
from nvr_types import File

def app_dir():
    return os.path.dirname(os.path.abspath(__file__))

def load_config(config_name):
    try:
        path = os.path.join(app_dir(), config_name)
        print("Looking config file", path)
        with open(path, "r", encoding="utf8") as f:
            return loads(f.read())
    except Exception as e:
        print("cannot find or parse config.json", e)
        sys.exit(1)       

class Recorder:
    loop = asyncio.get_event_loop()
    def __init__(self, address, port, username, password, name = ""):
        self.address = address
        self.port = int(port)
        self.username = username
        self.password = password
        self.name = name

    @property
    def nvr(self):
        client = DVRIPCam(self.address, port = self.port, user = self.username, password = self.password)
        return NVR(client, self.loop)

    def __str__(self) -> str:
        if not self.name:
            return f"{self.address}:{self.port}"
        else:
            return self.name

class Config:
    def __init__(self, config_name = "config.json") -> None:
        raw = load_config(config_name)
        self.listen_address = raw.get("backend", {}).get("address", "0.0.0.0")
        self.listen_port = int(raw.get("backend", {}).get("port", "8080"))
        self.recorders = []
        for raw_server in raw.get("recorders", []):
            self.recorders.append(Recorder(raw_server.get("ip"), raw_server.get("port"), raw_server.get("user"), raw_server.get("password"), raw_server.get("name", "")))
        if (self.recorders.__len__() == 0):
            print("Recorders not find")
        else:
            for recorder in self.recorders:
                print(recorder)

    def getRecorder(self, index = 0) -> Recorder:
        return self.recorders[index]

    def getRecorders(self):
        return [str(r) for r in self.recorders]