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import os

from ament_index_python.resources import get_resource

from python_qt_binding import loadUi
from python_qt_binding.QtWidgets import QWidget


class TextFilterWidget(QWidget):

    def __init__(self, parentfilter):
        """
        Widget for displaying interactive data related to text filtering.
        :param parentfilter: buddy filter were data is stored, ''TimeFilter''
        """
        super(TextFilterWidget, self).__init__()

        pkg_name = 'rqt_console'
        _, package_path = get_resource('packages', pkg_name)
        ui_file = os.path.join(
            package_path, 'share', pkg_name, 'resource', 'filters', 'text_filter_widget.ui')

        loadUi(ui_file, self)
        self.setObjectName('TextFilterWidget')
        self._parentfilter = parentfilter  # When data is changed it is stored in the parent filter

        self.text_edit.textChanged.connect(self.handle_text_changed)
        self.regex_check_box.clicked[bool].connect(self.handle_regex_clicked)

        self.handle_text_changed()

    def set_text(self, text):
        """
        Setter for the text edit widget
        :param text: text to be placed in text_edit, ''str''
        """
        self.text_edit.setText(text)

    def set_regex(self, checked):
        """
        Setter for the text edit widget
        :param text: text to be placed in text_edit, ''str''
        """
        self.regex_check_box.setChecked(checked)
        self.handle_regex_clicked(checked)

    def handle_text_changed(self):
        self._parentfilter.set_text(self.text_edit.text())

    def handle_regex_clicked(self, clicked):
        self._parentfilter.set_regex(clicked)

    def repopulate(self):
        """
        Stub function.
        If the widget had any dynamically adjustable data it would requery it
        in this function.
        """
        pass

    def save_settings(self, settings):
        settings.set_value('text', self._parentfilter._text)
        settings.set_value('regex', self._parentfilter._regex)

    def restore_settings(self, settings):
        text = settings.value('text', '')
        self.set_text(text)
        self.handle_text_changed()

        regex = settings.value('regex') in [True, 'true']
        self.set_regex(regex)
        self.handle_regex_clicked(regex)
