# coding: utf-8
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"""Basic tests for ColormapDialog"""

__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "09/11/2018"


import unittest

from silx.gui import qt
from silx.gui.dialog import ColormapDialog
from silx.gui.utils.testutils import TestCaseQt
from silx.gui.colors import Colormap, preferredColormaps
from silx.utils.testutils import ParametricTestCase
from silx.gui.plot.PlotWindow import PlotWindow

import numpy.random


# Makes sure a QApplication exists
_qapp = qt.QApplication.instance() or qt.QApplication([])


class TestColormapDialog(TestCaseQt, ParametricTestCase):
    """Test the ColormapDialog."""
    def setUp(self):
        TestCaseQt.setUp(self)
        ParametricTestCase.setUp(self)
        self.colormap = Colormap(name='gray', vmin=10.0, vmax=20.0,
                                 normalization='linear')

        self.colormapDiag = ColormapDialog.ColormapDialog()
        self.colormapDiag.setAttribute(qt.Qt.WA_DeleteOnClose)

    def tearDown(self):
        del self.colormapDiag
        ParametricTestCase.tearDown(self)
        TestCaseQt.tearDown(self)

    def testGUIEdition(self):
        """Make sure the colormap is correctly edited and also that the
        modification are correctly updated if an other colormapdialog is
        editing the same colormap"""
        colormapDiag2 = ColormapDialog.ColormapDialog()
        colormapDiag2.setColormap(self.colormap)
        colormapDiag2.show()
        self.colormapDiag.setColormap(self.colormap)
        self.colormapDiag.show()

        self.colormapDiag._comboBoxColormap._setCurrentName('red')
        self.colormapDiag._normButtonLog.click()
        self.assertTrue(self.colormap.getName() == 'red')
        self.assertTrue(self.colormapDiag.getColormap().getName() == 'red')
        self.assertTrue(self.colormap.getNormalization() == 'log')
        self.assertTrue(self.colormap.getVMin() == 10)
        self.assertTrue(self.colormap.getVMax() == 20)
        # checked second colormap dialog
        self.assertTrue(colormapDiag2._comboBoxColormap.getCurrentName() == 'red')
        self.assertTrue(colormapDiag2._normButtonLog.isChecked())
        self.assertTrue(int(colormapDiag2._minValue.getValue()) == 10)
        self.assertTrue(int(colormapDiag2._maxValue.getValue()) == 20)
        colormapDiag2.close()

    def testGUIModalOk(self):
        """Make sure the colormap is modified if gone through accept"""
        assert self.colormap.isAutoscale() is False
        self.colormapDiag.setModal(True)
        self.colormapDiag.show()
        self.colormapDiag.setColormap(self.colormap)
        self.assertTrue(self.colormap.getVMin() is not None)
        self.colormapDiag._minValue.setValue(None)
        self.assertTrue(self.colormap.getVMin() is None)
        self.colormapDiag._maxValue.setValue(None)
        self.mouseClick(
            widget=self.colormapDiag._buttonsModal.button(qt.QDialogButtonBox.Ok),
            button=qt.Qt.LeftButton
        )
        self.assertTrue(self.colormap.getVMin() is None)
        self.assertTrue(self.colormap.getVMax() is None)
        self.assertTrue(self.colormap.isAutoscale() is True)

    def testGUIModalCancel(self):
        """Make sure the colormap is not modified if gone through reject"""
        assert self.colormap.isAutoscale() is False
        self.colormapDiag.setModal(True)
        self.colormapDiag.show()
        self.colormapDiag.setColormap(self.colormap)
        self.assertTrue(self.colormap.getVMin() is not None)
        self.colormapDiag._minValue.setValue(None)
        self.assertTrue(self.colormap.getVMin() is None)
        self.mouseClick(
            widget=self.colormapDiag._buttonsModal.button(qt.QDialogButtonBox.Cancel),
            button=qt.Qt.LeftButton
        )
        self.assertTrue(self.colormap.getVMin() is not None)

    def testGUIModalClose(self):
        assert self.colormap.isAutoscale() is False
        self.colormapDiag.setModal(False)
        self.colormapDiag.show()
        self.colormapDiag.setColormap(self.colormap)
        self.assertTrue(self.colormap.getVMin() is not None)
        self.colormapDiag._minValue.setValue(None)
        self.assertTrue(self.colormap.getVMin() is None)
        self.mouseClick(
            widget=self.colormapDiag._buttonsNonModal.button(qt.QDialogButtonBox.Close),
            button=qt.Qt.LeftButton
        )
        self.assertTrue(self.colormap.getVMin() is None)

    def testGUIModalReset(self):
        assert self.colormap.isAutoscale() is False
        self.colormapDiag.setModal(False)
        self.colormapDiag.show()
        self.colormapDiag.setColormap(self.colormap)
        self.assertTrue(self.colormap.getVMin() is not None)
        self.colormapDiag._minValue.setValue(None)
        self.assertTrue(self.colormap.getVMin() is None)
        self.mouseClick(
            widget=self.colormapDiag._buttonsNonModal.button(qt.QDialogButtonBox.Reset),
            button=qt.Qt.LeftButton
        )
        self.assertTrue(self.colormap.getVMin() is not None)
        self.colormapDiag.close()

    def testGUIClose(self):
        """Make sure the colormap is modify if go through reject"""
        assert self.colormap.isAutoscale() is False
        self.colormapDiag.show()
        self.colormapDiag.setColormap(self.colormap)
        self.assertTrue(self.colormap.getVMin() is not None)
        self.colormapDiag._minValue.setValue(None)
        self.assertTrue(self.colormap.getVMin() is None)
        self.colormapDiag.close()
        self.assertTrue(self.colormap.getVMin() is None)

    def testSetColormapIsCorrect(self):
        """Make sure the interface fir the colormap when set a new colormap"""
        self.colormap.setName('red')
        self.colormapDiag.show()
        for norm in (Colormap.NORMALIZATIONS):
            for autoscale in (True, False):
                if autoscale is True:
                    self.colormap.setVRange(None, None)
                else:
                    self.colormap.setVRange(11, 101)
                self.colormap.setNormalization(norm)
                with self.subTest(colormap=self.colormap):
                    self.colormapDiag.setColormap(self.colormap)
                    self.assertTrue(
                        self.colormapDiag._normButtonLinear.isChecked() == (norm is Colormap.LINEAR))
                    self.assertTrue(
                        self.colormapDiag._comboBoxColormap.getCurrentName() == 'red')
                    self.assertTrue(
                        self.colormapDiag._minValue.isAutoChecked() == autoscale)
                    self.assertTrue(
                        self.colormapDiag._maxValue.isAutoChecked() == autoscale)
                    if autoscale is False:
                        self.assertTrue(self.colormapDiag._minValue.getValue() == 11)
                        self.assertTrue(self.colormapDiag._maxValue.getValue() == 101)
                        self.assertTrue(self.colormapDiag._minValue.isEnabled())
                        self.assertTrue(self.colormapDiag._maxValue.isEnabled())
                    else:
                        self.assertFalse(self.colormapDiag._minValue._numVal.isEnabled())
                        self.assertFalse(self.colormapDiag._maxValue._numVal.isEnabled())

    def testColormapDel(self):
        """Check behavior if the colormap has been deleted outside. For now
        we make sure the colormap is still running and nothing more"""
        self.colormapDiag.setColormap(self.colormap)
        self.colormapDiag.show()
        del self.colormap
        self.assertTrue(self.colormapDiag.getColormap() is None)
        self.colormapDiag._comboBoxColormap._setCurrentName('blue')

    def testColormapEditedOutside(self):
        """Make sure the GUI is still up to date if the colormap is modified
        outside"""
        self.colormapDiag.setColormap(self.colormap)
        self.colormapDiag.show()

        self.colormap.setName('red')
        self.assertTrue(
            self.colormapDiag._comboBoxColormap.getCurrentName() == 'red')
        self.colormap.setNormalization(Colormap.LOGARITHM)
        self.assertFalse(self.colormapDiag._normButtonLinear.isChecked())
        self.colormap.setVRange(11, 201)
        self.assertTrue(self.colormapDiag._minValue.getValue() == 11)
        self.assertTrue(self.colormapDiag._maxValue.getValue() == 201)
        self.assertTrue(self.colormapDiag._minValue._numVal.isEnabled())
        self.assertTrue(self.colormapDiag._maxValue._numVal.isEnabled())
        self.assertFalse(self.colormapDiag._minValue.isAutoChecked())
        self.assertFalse(self.colormapDiag._maxValue.isAutoChecked())
        self.colormap.setVRange(None, None)
        self.assertFalse(self.colormapDiag._minValue._numVal.isEnabled())
        self.assertFalse(self.colormapDiag._maxValue._numVal.isEnabled())
        self.assertTrue(self.colormapDiag._minValue.isAutoChecked())
        self.assertTrue(self.colormapDiag._maxValue.isAutoChecked())

    def testSetColormapScenario(self):
        """Test of a simple scenario of a colormap dialog editing several
        colormap"""
        colormap1 = Colormap(name='gray', vmin=10.0, vmax=20.0,
                             normalization='linear')
        colormap2 = Colormap(name='red', vmin=10.0, vmax=20.0,
                             normalization='log')
        colormap3 = Colormap(name='blue', vmin=None, vmax=None,
                             normalization='linear')
        self.colormapDiag.setColormap(self.colormap)
        self.colormapDiag.setColormap(colormap1)
        del colormap1
        self.colormapDiag.setColormap(colormap2)
        del colormap2
        self.colormapDiag.setColormap(colormap3)
        del colormap3

    def testNotPreferredColormap(self):
        """Test that the colormapEditor is able to edit a colormap which is not
        part of the 'prefered colormap'
        """
        def getFirstNotPreferredColormap():
            cms = Colormap.getSupportedColormaps()
            preferred = preferredColormaps()
            for cm in cms:
                if cm not in preferred:
                    return cm
            return None

        colormapName = getFirstNotPreferredColormap()
        assert colormapName is not None
        colormap = Colormap(name=colormapName)
        self.colormapDiag.setColormap(colormap)
        self.colormapDiag.show()
        cb = self.colormapDiag._comboBoxColormap
        self.assertTrue(cb.getCurrentName() == colormapName)
        cb.setCurrentIndex(0)
        index = cb.findLutName(colormapName)
        assert index is not 0  # if 0 then the rest of the test has no sense
        cb.setCurrentIndex(index)
        self.assertTrue(cb.getCurrentName() == colormapName)

    def testColormapEditableMode(self):
        """Test that the colormapDialog is correctly updated when changing the
        colormap editable status"""
        colormap = Colormap(normalization='linear', vmin=1.0, vmax=10.0)
        self.colormapDiag.show()
        self.colormapDiag.setColormap(colormap)
        for editable in (True, False):
            with self.subTest(editable=editable):
                colormap.setEditable(editable)
                self.assertTrue(
                    self.colormapDiag._comboBoxColormap.isEnabled() is editable)
                self.assertTrue(
                    self.colormapDiag._minValue.isEnabled() is editable)
                self.assertTrue(
                    self.colormapDiag._maxValue.isEnabled() is editable)
                self.assertTrue(
                    self.colormapDiag._normButtonLinear.isEnabled() is editable)
                self.assertTrue(
                    self.colormapDiag._normButtonLog.isEnabled() is editable)

        # Make sure the reset button is also set to enable when edition mode is
        # False
        self.colormapDiag.setModal(False)
        colormap.setEditable(True)
        self.colormapDiag._normButtonLog.click()
        resetButton = self.colormapDiag._buttonsNonModal.button(qt.QDialogButtonBox.Reset)
        self.assertTrue(resetButton.isEnabled())
        colormap.setEditable(False)
        self.assertFalse(resetButton.isEnabled())

    def testImageData(self):
        data = numpy.random.rand(5, 5)
        self.colormapDiag.setData(data)

    def testEmptyData(self):
        data = numpy.empty((10, 0))
        self.colormapDiag.setData(data)

    def testNoneData(self):
        data = numpy.random.rand(5, 5)
        self.colormapDiag.setData(data)
        self.colormapDiag.setData(None)


class TestColormapAction(TestCaseQt):
    def setUp(self):
        TestCaseQt.setUp(self)
        self.plot = PlotWindow()
        self.plot.setAttribute(qt.Qt.WA_DeleteOnClose)

        self.colormap1 = Colormap(name='blue', vmin=0.0, vmax=1.0,
                                  normalization='linear')
        self.colormap2 = Colormap(name='red', vmin=10.0, vmax=100.0,
                                  normalization='log')
        self.defaultColormap = self.plot.getDefaultColormap()

        self.plot.getColormapAction()._actionTriggered(checked=True)
        self.colormapDialog = self.plot.getColormapAction()._dialog
        self.colormapDialog.setAttribute(qt.Qt.WA_DeleteOnClose)

    def tearDown(self):
        self.colormapDialog.close()
        self.plot.close()
        del self.colormapDialog
        del self.plot
        TestCaseQt.tearDown(self)

    def testActiveColormap(self):
        self.assertTrue(self.colormapDialog.getColormap() is self.defaultColormap)

        self.plot.addImage(data=numpy.random.rand(10, 10), legend='img1',
                           origin=(0, 0),
                           colormap=self.colormap1)
        self.plot.setActiveImage('img1')
        self.assertTrue(self.colormapDialog.getColormap() is self.colormap1)

        self.plot.addImage(data=numpy.random.rand(10, 10), legend='img2',
                           origin=(0, 0),
                           colormap=self.colormap2)
        self.plot.addImage(data=numpy.random.rand(10, 10), legend='img3',
                           origin=(0, 0))

        self.plot.setActiveImage('img3')
        self.assertTrue(self.colormapDialog.getColormap() is self.defaultColormap)
        self.plot.getActiveImage().setColormap(self.colormap2)
        self.assertTrue(self.colormapDialog.getColormap() is self.colormap2)

        self.plot.remove('img2')
        self.plot.remove('img3')
        self.plot.remove('img1')
        self.assertTrue(self.colormapDialog.getColormap() is self.defaultColormap)

    def testShowHideColormapDialog(self):
        self.plot.getColormapAction()._actionTriggered(checked=False)
        self.assertFalse(self.plot.getColormapAction().isChecked())
        self.plot.getColormapAction()._actionTriggered(checked=True)
        self.assertTrue(self.plot.getColormapAction().isChecked())
        self.plot.addImage(data=numpy.random.rand(10, 10), legend='img1',
                           origin=(0, 0),
                           colormap=self.colormap1)
        self.colormap1.setName('red')
        self.plot.getColormapAction()._actionTriggered()
        self.colormap1.setName('blue')
        self.colormapDialog.close()
        self.assertFalse(self.plot.getColormapAction().isChecked())


def suite():
    test_suite = unittest.TestSuite()
    for testClass in (TestColormapDialog, TestColormapAction):
        test_suite.addTest(unittest.defaultTestLoader.loadTestsFromTestCase(
            testClass))
    return test_suite


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