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'''Test case for PYSIDE-1354: Ensure that slots are invoked from the receiver's
thread context when using derived classes (and thus, a global receiver).'''

import os
import sys
import unittest

sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from init_paths import init_test_paths
init_test_paths(False)

from PySide2.QtCore import QObject, QThread, QTimer, Slot
from helper.usesqcoreapplication import UsesQCoreApplication


class ReceiverBase(QObject):
    def __init__(self, parent=None):
        super(ReceiverBase, self).__init__(parent)
        self.senderThread = None

    @Slot()
    def slot_function(self):
        self.senderThread = QThread.currentThread()


class Receiver(ReceiverBase):
    pass


class TestThread(QThread):
    def __init__(self, parent=None):
        super(TestThread, self).__init__(parent)

    def run(self):
        pass


class SignalAcrossThreads(UsesQCoreApplication):
    def setUp(self):
        UsesQCoreApplication.setUp(self)
        self._timer_tick = 0
        self._timer = QTimer()
        self._timer.setInterval(20)
        self._timer.timeout.connect(self._control_test)
        self._worker_thread = TestThread()

    def tearDown(self):
        UsesQCoreApplication.tearDown(self)

    @Slot()
    def _control_test(self):
        if self._timer_tick == 0:
            self._worker_thread.start()
        elif self._timer_tick == 1:
            self._worker_thread.wait()
        else:
            self._timer.stop()
            self.app.quit()
        self._timer_tick += 1

    def test(self):
        worker_thread_receiver = Receiver()
        worker_thread_receiver.moveToThread(self._worker_thread)
        self._worker_thread.started.connect(worker_thread_receiver.slot_function)

        main_thread = QThread.currentThread()
        main_thread_receiver = Receiver()
        self._worker_thread.started.connect(main_thread_receiver.slot_function)

        self._timer.start()
        self.app.exec_()

        self.assertEqual(worker_thread_receiver.senderThread, self._worker_thread)
        self.assertEqual(main_thread_receiver.senderThread, main_thread)


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