import sys
from PyQt5.QtCore import QThread
from PyQt5.QtQml import QQmlApplicationEngine
from PyQt5.QtWidgets import QApplication
from gui import GUI
from webcam_controller import WebcamControl

if __name__ == '__main__':
    # create the main Qt application objects
    app = QApplication(sys.argv)
    engine = QQmlApplicationEngine()
    context = engine.rootContext()

    webcam_control = WebcamControl()
    webcam_control_thread = QThread()
    webcam_control.moveToThread(webcam_control_thread)
    webcam_control_thread.started.connect(webcam_control.start)

    # start the main thread
    webcam_control_thread.start()
    gui = GUI()

    # make GUI signal connections
    webcam_control.status_signal.connect(gui.handle_connection_status)
    webcam_control.webcammanager.video.connect(gui.handle_image)
    gui.webcam_connect.connect(webcam_control.command_connect)

    context.setContextProperty("gui", gui)
    engine.addImageProvider("webcam", gui.webcam_provider)

    app.setQuitOnLastWindowClosed(False)
    app.lastWindowClosed.connect(webcam_control.shutdown)
    webcam_control.shutdown_event.connect(app.quit)

    engine.load('main.qml')
    status = app.exec_()
    sys.exit(status)