from __future__ import annotations

from typing import TYPE_CHECKING

from PySide6.QtCore import QObject, QEvent
from PySide6.QtWidgets import QApplication, QWidget

if TYPE_CHECKING:
    from PySide6.QtGui import QDragEnterEvent


class MainWindow(QWidget):
    def __init__(self):
        super().__init__()

        self._drop_processor = DropProcessor()

        self.setAcceptDrops(True)
        self.installEventFilter(self._drop_processor)

    # All works well, when we are using dragEnterEvent method instead of installEventFilter
    # def dragEnterEvent(self, event: QDragEnterEvent):
    #     print(f'dragEnterEvent {event} type: {type(event)}')
    #     print(f'mimeData: {event.mimeData()}')
    #     event.acceptProposedAction()


class DropProcessor(QObject):
    def eventFilter(self, watched: QObject, event: QEvent):
        if event.type() == QEvent.DragEnter:
            print(f'drag eventFilter:\n\tevent.type(): {event.type()}\n\tevent: {event}\n\ttype(event): {type(event)}')
            # We'll get the next error here if we try to get event.mimeData()
            # AttributeError: 'PySide6.QtCore.QEvent' object has no attribute 'mimeData'
            # event.mimeData()
            event.setAccepted(True)
            return True
        elif event.type() == QEvent.Drop:
            print(f'drop eventFilter:\n\tevent.type(): {event.type()}\n\tevent: {event}\n\ttype(event): {type(event)}')
            return True
        else:
            return super().eventFilter(watched, event)


if __name__ == '__main__':
    app = QApplication()
    main_window = MainWindow()
    main_window.show()
    app.exec()