import npyscreen
import bisect


class RemovableMulti(npyscreen.MultiLineAction):

    def actionHighlighted(self, act_on_this, keypress):
        self.remove_item()

    def register_oppisite(self, opposite):
        self.opposite = opposite
        opposite.opposite = self

    def remove_item(self):
        selected_value = self.values[self.cursor_line]
        del self.values[self.cursor_line]
        bisect.insort(self.opposite.values, selected_value)

        self.opposite.display()
        self.display()


class BoxedRemovableMulti(npyscreen.BoxTitle):
    _contained_widget = RemovableMulti


class AddRemoveForm(npyscreen.ActionFormV2):
    def create(self):
        self.keepers = self.add(
            BoxedRemovableMulti,
            values=sorted(self.parentApp.starting_values),
            name="Words to keep",
            max_height=10
        )
        self.to_remove = self.add(
            BoxedRemovableMulti, values=[],  name="Words to remove",
            max_height=10
        )
        self.keepers.entry_widget.register_oppisite(
            self.to_remove.entry_widget)

    def on_cancel(self):
        self.canceled = True

    def on_ok(self):
        self.canceled = False

    def afterEditing(self):
        self.parentApp.setNextForm(None)


class RemoveWordsActivity(npyscreen.NPSAppManaged):
    def __init__(self, starting_values, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.starting_values = starting_values

    def onStart(self):
        self.addForm('MAIN', AddRemoveForm,
                     name="Exclude Words", minimum_lines=0, minimum_columns=0)

    def get_results(self):
        form = self.getForm('MAIN')
        vals = form.to_remove.entry_widget.values
        canceled = form.canceled
        return canceled, vals


if __name__ == "__main__":
    values = [
        'hello',
        'return',
        'butt',
        'fuck',
        'abcdefghijklmnopqrstuvwxyz'
    ]
    app = RemoveWordsActivity(values)
    app.run()