# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

from functools import partial
import os
import random
import sys
import unittest

from pathlib import Path
sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
from init_paths import init_test_paths
init_test_paths(False)

from PySide6.QtCore import QObject, SIGNAL

try:
    from PySide6.QtWidgets import QPushButton, QSpinBox
    hasQtGui = True
except ImportError:
    hasQtGui = False

from helper.basicpyslotcase import BasicPySlotCase
from helper.usesqapplication import UsesQApplication


class MultipleSignalConnections(unittest.TestCase):
    '''Base class for multiple signal connection testing'''

    def run_many(self, sender, signal, emitter, receivers, args=None):
        """Utility method to connect a list of receivers to a signal.
        sender - QObject that will emit the signal
        signal - string with the signal signature
        emitter - the callable that will trigger the signal
        receivers - list of BasicPySlotCase instances
        args - tuple with the arguments to be sent.
        """

        if args is None:
            args = tuple()

        for rec in receivers:
            rec.setUp()
            QObject.connect(sender, SIGNAL(signal), rec.cb)
            rec.args = tuple(args)

        emitter(*args)

        for rec in receivers:
            self.assertTrue(rec.called)


if hasQtGui:
    class QtGuiMultipleSlots(UsesQApplication, MultipleSignalConnections):
        '''Multiple connections to QtGui signals'''

        def testButtonClick(self):
            """Multiple connections to QPushButton.clicked()"""
            sender = QPushButton('button')
            receivers = [BasicPySlotCase() for x in range(30)]
            self.run_many(sender, 'clicked()', sender.click, receivers)

        def testSpinBoxValueChanged(self):
            """Multiple connections to QSpinBox.valueChanged(int)"""
            sender = QSpinBox()
            # FIXME if number of receivers if higher than 50, segfaults
            receivers = [BasicPySlotCase() for x in range(10)]
            self.run_many(sender, 'valueChanged(int)', sender.setValue,
                          receivers, (1,))

if __name__ == '__main__':
    unittest.main()