import logging
import os
import signal
import ctypes
from pathlib import Path

from PySide6 import QtCore
from PySide6.QtWidgets import QApplication
from PySide6.QtCore import QTimer, QLibraryInfo, QTranslator, QLocale
from PySide6.QtGui import QIcon
import sys

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

import gettext

gettext.install('ravenlog', 'locale')

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)

    locale = os.environ['LANG'] if os.environ['LANG'] else "en"

    src_dir = Path(__file__).resolve().parent
    try:
        translation = gettext.translation('messages', localedir=src_dir / 'locales', languages=[locale])
        if translation:
            translation.install()
            _ = translation.gettext
            ngettext = translation.ngettext
    except FileNotFoundError:
        pass
    if not _:
        _ = gettext.gettext
        ngettext = gettext.ngettext
        print('No translation found')

    # 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")
    PluginRegistry.load_plugin("LogFilePlugin")
    PluginRegistry.load_plugin("NotesPlugin")

    PluginRegistry.execute("set_translator", lambda string: translator.tr(string))

    window = PluginRegistry.execute_single("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")
    # PluginRegistry.execute("open_file", "/home/andi/ws/ravenlog/example.log")
    PluginRegistry.execute("open_file",
                           "/home/andi/ws/performanceDb/data/production/lt_axc_21.4_133.02_maxInstance/lt_axc_21.4_133.02_maxInstance/app/axcng-service_i-0a69bd43d3624a5bc_172_28_60_222_VADPERFO01AA001_2021-09-21_091717/service/service.log");
    PluginRegistry.execute("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()