# coding: utf-8
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# Copyright (c) 2016-2017 European Synchrotron Radiation Facility
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__authors__ = ["H. Payno"]
__license__ = "MIT"
__date__ = "02/11/2020"


import unittest
from processview.core.superviseprocess import SuperviseProcess
from processview.core.dataset import Dataset
from processview.core.dataset import DatasetIdentifier
from processview.gui.processmanager import ProcessManager
from processview.core.manager import DatasetState
from silx.gui.utils.testutils import SignalListener
from silx.gui.utils.testutils import TestCaseQt
import gc


class TestProcessManager(TestCaseQt):
    """
    test ProcessManager
    """

    def setUp(self):
        TestCaseQt.setUp(self)
        self.signalListener = SignalListener()
        self.manager = ProcessManager()
        self.manager.sigUpdated.connect(self.signalListener)

    def tearDown(self):
        self.signalListener = None
        self.processManager = None
        gc.collect()
        TestCaseQt.tearDown(self)

    def testProcessStatesUpdate(self):
        """insure providing states works well"""
        p1 = SuperviseProcess()
        p2 = SuperviseProcess()
        scan_1 = _DummyScan("scan1")
        scan_2 = _DummyScan("scan2")
        self.manager.notify_dataset_state(
            dataset=scan_1, state=DatasetState.PENDING, process=p1
        )
        self.manager.notify_dataset_state(
            dataset=scan_2, state=DatasetState.SUCCEED, process=p1
        )
        self.manager.notify_dataset_state(
            dataset=scan_2, state=DatasetState.FAILED, process=p2
        )
        self.assertEqual(self.signalListener.callCount(), 3)


class _DummyScan(Dataset):
    def __init__(self, name):
        super().__init__()
        self.name = name

    def __str__(self) -> str:
        return self.name

    def get_dataset_identifier(self) -> DatasetIdentifier:
        return _DummyIdentifier(self)


class _DummyIdentifier(DatasetIdentifier):
    def __init__(self, dataset):
        super().__init__(dataset)
        self.name = dataset.name

    def __str__(self):
        return self.name

    def __eq__(self, other):
        return self.name == other.name

    def __hash__(self):
        return hash(self.name)


def suite():
    test_suite = unittest.TestSuite()
    for ui in (TestProcessManager,):
        test_suite.addTest(unittest.defaultTestLoader.loadTestsFromTestCase(ui))
    return test_suite
