from UM.Application import Application
from cura.PrinterOutputDevice import PrinterOutputDevice

from PyQt5.QtNetwork import QHttpMultiPart, QHttpPart, QNetworkRequest, QNetworkAccessManager, QNetworkReply
from PyQt5.QtCore import QUrl

from time import time
from typing import Callable

class NetworkedPrinterOutputDevice(PrinterOutputDevice):
    def __init__(self, device_id, parent = None):
        super().__init__(device_id = device_id, parent = parent)
        self._manager = None
        self._createNetworkManager()
        self._last_response_time = time()
        self._last_request_time = None
        self._api_prefix = ""
        self._address = ""

        self._user_agent = "%s/%s " % (Application.getInstance().getApplicationName(), Application.getInstance().getVersion())

        self._onFinishedCallbacks = {}

    def _update(self):
        if not self._manager.networkAccessible():
            pass  # TODO: no internet connection.

        pass

    def _createEmptyRequest(self, target):
        url = QUrl("http://" + self._address + self._api_prefix + target)
        request = QNetworkRequest(url)
        request.setHeader(QNetworkRequest.ContentTypeHeader, "application/json")
        request.setHeader(QNetworkRequest.UserAgentHeader, self._user_agent)
        return request

    def _put(self, target: str, data: str, onFinished: Callable):
        request = self._createEmptyRequest(target)
        self._onFinishedCallbacks[request] = onFinished
        self._manager.put(request, data.encode())

    def _get(self, target: str, onFinished: Callable):
        request = self._createEmptyRequest(target)
        self._onFinishedCallbacks[request] = onFinished
        self._manager.get(request)

    def _delete(self, target: str, onFinished: Callable):
        pass

    def _post(self, target: str, data: str, onFinished: Callable, onProgress: Callable):
        pass

    def _createNetworkManager(self):
        if self._manager:
            self._manager.finished.disconnect(self.__handleOnFinished)
            #self._manager.networkAccessibleChanged.disconnect(self._onNetworkAccesibleChanged)
            #self._manager.authenticationRequired.disconnect(self._onAuthenticationRequired)

        self._manager = QNetworkAccessManager()
        self._manager.finished.connect(self.__handleOnFinished)
        #self._manager.authenticationRequired.connect(self._onAuthenticationRequired)
        #self._manager.networkAccessibleChanged.connect(self._onNetworkAccesibleChanged)  # for debug purposes

    def __handleOnFinished(self, reply: QNetworkReply):
        self._last_response_time = time()
        try:
            self._onFinishedCallbacks[reply.request()](reply)
            del self._onFinishedCallbacks[reply.request]  # Remove the callback.
        except Exception as e:
            print("Something went wrong with callback", e)
        pass