import logging
import signal
from PySide6 import QtCore
from PySide6.QtWidgets import QApplication
from PySide6.QtCore import QTimer
import sys
import constants
from src import install
from src.pluginregistry import PluginRegistry
import gettext
from src.ui.icon import Icon

__version__ = '0.2.0'

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

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


def register_signal_handler():
    signal.signal(signal.SIGINT, stop_signal)
    signal.signal(signal.SIGTERM, stop_signal)


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)


def apply_time_workaround():
    # 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)


def init_plugins():
    PluginRegistry.load_plugin("KrowLogPlugin")
    PluginRegistry.load_plugin("OpenFilePlugin")
    PluginRegistry.load_plugin("LogFilePlugin")
    PluginRegistry.load_plugin("NotesPlugin")
    PluginRegistry.load_plugin("TimeDiffPlugin")
    PluginRegistry.load_plugin("FilesBrowserPlugin")


if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setWindowIcon(Icon(constants.krow_icon))  # works only for Linux (but only X11, not Wayland)

    # install stuff, e.g. a desktop file, set icon on Windows
    install.install()

    apply_time_workaround()

    init_plugins()
    window = PluginRegistry.execute_single("create_main_window")
    window.show()

    PluginRegistry.execute("after_start")

    register_signal_handler()

    app.exec()