import logging
import signal
import ctypes

from PyQt6 import QtCore
from PyQt6.QtWidgets import *
from PyQt6.QtCore import *
from PyQt6.QtGui import *
import sys

import constants
from raven.pluginregistry import PluginRegistry
from ravenui import RavenUI


logging.basicConfig(level=logging.INFO)
log = logging.getLogger("main")

def stop_signal(signum, _stackframe):
    """ Handle terminate signal """
    try:
        log.info("Terminate signal received. %s", signum)
        QtCore.QCoreApplication.quit()
    except Exception:
        log.exception("Exception occurred while terminating")
        sys.exit(1)
    sys.exit(0)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setWindowIcon(QIcon(constants.raven_icon))  # works only for Linux

    # make icon appear in Windows
    # see https://stackoverflow.com/questions/1551605/how-to-set-applications-taskbar-icon-in-windows-7/1552105#1552105
    if sys.platform == 'win32' or sys.platform == 'cygwin':
        myappid = 'opentext.ravenlog'  # arbitrary string
        ctypes.windll.shell32.SetCurrentProcessExplicitAppUserModelID(myappid)

    # translator = QTranslator()
    # if translator.load(QLocale("de"), "messages_de.ts"):
    #    app.installTranslator(translator)

    # workaround to make signals work in QT apps.
    # They do not work out of the box, because the main thread
    # is running in C++ code once app.exec() is executed
    # Forcing an empty lambda to be executed periodically gives
    # control back to python and allows python to react to signals
    timer = QTimer()
    timer.timeout.connect(lambda: None)
    timer.start(100)

    # init plugins
    PluginRegistry.load_plugin("RavenLogPlugin")
    PluginRegistry.load_plugin("OpenFilePlugin")

    window = PluginRegistry.executeSingle("create_main_window")
    RavenUI.window = window
    window.show()
    # window.open_file("/home/andi/ws/performanceDb/data/production/logs_2018-09-06_2018-09-06.csv")
    # window.open_file("/home/andi/ws/performanceDb/data/production/vapbdcom.csv")
    # window.open_file("/var/log/syslog")
    # window.open_file("/home/andi/ws/ravenlog/example.log")
    # window.open_file("C:\\Users\\andi\\ws\\some.log")

    signal.signal(signal.SIGINT, stop_signal)
    signal.signal(signal.SIGTERM, stop_signal)

    app.exec()