import sys
import subprocess
import unittest
import webbrowser
import logging

from PyQt4.QtGui import *
from PyQt4.QtTest import QTest
from PyQt4.QtCore import *
from PyQt4.QtWebKit import *
from mock import MagicMock

# Local
from DataExplorer import DataExplorerWindow
from AboutBox import AboutBox
from WelcomePanel import WelcomePanel
from IPythonWidget import IPythonWidget

from GuiManager import Acknowledgements, GuiManager
from MainWindow import MainSasViewWindow
from UnitTesting.TestUtils import QtSignalSpy

app = QApplication(sys.argv)

class GuiManagerTest(unittest.TestCase):
    '''Test the Main Window functionality'''
    def setUp(self):
        '''Create the tested object'''
        class MainWindow(MainSasViewWindow):
            # Main window of the application
            def __init__(self, reactor, parent=None):
                super(MainWindow, self).__init__(parent)
        
                # define workspace for dialogs.
                self.workspace = QWorkspace(self)
                self.setCentralWidget(self.workspace)

        self.manager = GuiManager(MainWindow(None), None)

    def tearDown(self):
        '''Destroy the GUI'''
        self.manager = None

    def testDefaults(self):
        """
        Test the object in its default state
        """
        self.assertIsInstance(self.manager.filesWidget, DataExplorerWindow)
        self.assertIsInstance(self.manager.dockedFilesWidget, QDockWidget)
        self.assertIsInstance(self.manager.dockedFilesWidget.widget(), DataExplorerWindow)
        self.assertEqual(self.manager.dockedFilesWidget.features(), QDockWidget.NoDockWidgetFeatures)
        self.assertEqual(self.manager._workspace.dockWidgetArea(self.manager.dockedFilesWidget), Qt.LeftDockWidgetArea)

        self.assertIsInstance(self.manager.logDockWidget, QDockWidget)
        self.assertIsInstance(self.manager.logDockWidget.widget(), QTextBrowser)
        self.assertEqual(self.manager._workspace.dockWidgetArea(self.manager.logDockWidget), Qt.BottomDockWidgetArea)

        self.assertIsInstance(self.manager.ackWidget, Acknowledgements)
        self.assertIsInstance(self.manager.aboutWidget, AboutBox)
        self.assertIsInstance(self.manager.welcomePanel, WelcomePanel)

    def testLogging(self):
        """
        Test logging of stdout, stderr and log messages
        """
        # See if the log window is empty
        self.assertEqual(self.manager.logDockWidget.widget().toPlainText(), "")

        # Now, send some message to stdout.
        # We are in the MainWindow scope, so simple 'print' will work
        message = "from stdout"
        print message
        self.assertIn(message, self.manager.logDockWidget.widget().toPlainText())

        # Send some message to stderr
        message = "from stderr"
        sys.stderr.write(message)
        self.assertIn(message, self.manager.logDockWidget.widget().toPlainText())

        # And finally, send a log message
        import logging
        message = "from logging"
        message_logged = "ERROR: " + message
        logging.error(message)
        self.assertIn(message_logged, self.manager.logDockWidget.widget().toPlainText())

    def testConsole(self):
        """
        Test the docked QtConsole
        """
        # Invoke the console action
        self.manager.actionPython_Shell_Editor()

        # Test the widegt properties
        self.assertIsInstance(self.manager.ipDockWidget, QDockWidget)
        self.assertIsInstance(self.manager.ipDockWidget.widget(), IPythonWidget)
        self.assertEqual(self.manager._workspace.dockWidgetArea(self.manager.ipDockWidget), Qt.RightDockWidgetArea)

    def testUpdatePerspective(self):
        """
        """
        pass

    def testUpdateStatusBar(self):
        """
        """
        pass

    def testSetData(self):
        """
        """
        pass

    def testSetData(self):
        """
        """
        pass

    def testQuitApplication(self):
        """
        Test that the custom exit method is called on shutdown
        """
        # Must mask sys.exit, otherwise the whole testing process stops.
        sys.exit = MagicMock()

        # Say No to the close dialog
        QMessageBox.question = MagicMock(return_value=QMessageBox.No)

        # Open, then close the manager
        self.manager.quitApplication()

        # See that the MessageBox method got called
        self.assertTrue(QMessageBox.question.called)

        # Say Yes to the close dialog
        QMessageBox.question = MagicMock(return_value=QMessageBox.Yes)

        # Open, then close the manager
        self.manager.quitApplication()

        # See that the MessageBox method got called
        self.assertTrue(QMessageBox.question.called)

    def testCheckUpdate(self):
        """
        Tests the SasView website version polling
        """
        self.manager.processVersion = MagicMock()
        version = {'update_url'  : 'http://www.sasview.org/sasview.latestversion', 
                   'version'     : '3.1.2',
                   'download_url': 'https://github.com/SasView/sasview/releases'}
        self.manager.checkUpdate()

        self.manager.processVersion.assert_called_with(version)

        pass

    def testProcessVersion(self):
        """
        Tests the version checker logic
        """
        # 1. version = 0.0.0
        version_info = {u'version' : u'0.0.0'}
        spy_status_update = QtSignalSpy(self.manager, self.manager.communicate.statusBarUpdateSignal)

        self.manager.processVersion(version_info)

        self.assertEqual(spy_status_update.count(), 1)
        message = 'Could not connect to the application server. Please try again later.'
        self.assertIn(message, str(spy_status_update.signal(index=0)))

        # 2. version < LocalConfig.__version__
        version_info = {u'version' : u'0.0.1'}
        spy_status_update = QtSignalSpy(self.manager, self.manager.communicate.statusBarUpdateSignal)

        self.manager.processVersion(version_info)

        self.assertEqual(spy_status_update.count(), 1)
        message = 'You have the latest version of SasView'
        self.assertIn(message, str(spy_status_update.signal(index=0)))

        # 3. version > LocalConfig.__version__
        version_info = {u'version' : u'999.0.0'}
        spy_status_update = QtSignalSpy(self.manager, self.manager.communicate.statusBarUpdateSignal)
        webbrowser.open = MagicMock()

        self.manager.processVersion(version_info)

        self.assertEqual(spy_status_update.count(), 1)
        message = 'Version 999.0.0 is available!'
        self.assertIn(message, str(spy_status_update.signal(index=0)))

        webbrowser.open.assert_called_with("https://github.com/SasView/sasview/releases")

        # 4. couldn't load version
        version_info = {}
        logging.error = MagicMock()
        spy_status_update = QtSignalSpy(self.manager, self.manager.communicate.statusBarUpdateSignal)

        self.manager.processVersion(version_info)

        # Retrieve and compare arguments of the mocked call
        message = "guiframe: could not get latest application version number"
        args, _ = logging.error.call_args
        self.assertIn(message, args[0])

        # Check the signal message
        message = 'Could not connect to the application server.'
        self.assertIn(message, str(spy_status_update.signal(index=0)))

    def testActions(self):
        """
        """
        pass

    #### FILE ####
    def testActionLoadData(self):
        """
        Menu File/Load Data File(s)
        """
        # Mock the system file open method
        QFileDialog.getOpenFileNames = MagicMock(return_value=None)

        # invoke the action
        self.manager.actionLoadData()

        # Test the getOpenFileName() dialog called once
        self.assertTrue(QFileDialog.getOpenFileNames.called)

    def testActionLoadDataFolder(self):
        """
        Menu File/Load Data Folder
        """
        # Mock the system file open method
        QFileDialog.getExistingDirectory = MagicMock(return_value=None)

        # invoke the action
        self.manager.actionLoad_Data_Folder()

        # Test the getOpenFileName() dialog called once
        self.assertTrue(QFileDialog.getExistingDirectory.called)

    #### VIEW ####
    def testActionHideToolbar(self):
        """
        Menu View/Hide Toolbar
        """
        # Need to display the main window to initialize the toolbar.
        self.manager._workspace.show()

        # Check the initial state
        self.assertTrue(self.manager._workspace.toolBar.isVisible())
        self.assertEqual('Hide Toolbar', self.manager._workspace.actionHide_Toolbar.text())

        # Invoke action
        self.manager.actionHide_Toolbar()

        # Assure changes propagated correctly
        self.assertFalse(self.manager._workspace.toolBar.isVisible())
        self.assertEqual('Show Toolbar', self.manager._workspace.actionHide_Toolbar.text())

        # Revert
        self.manager.actionHide_Toolbar()

        # Assure the original values are back
        self.assertTrue(self.manager._workspace.toolBar.isVisible())
        self.assertEqual('Hide Toolbar', self.manager._workspace.actionHide_Toolbar.text())


    #### HELP ####
    def testActionDocumentation(self):
        """
        Menu Help/Documentation
        """
        #Mock the QWebView method
        QWebView.show = MagicMock()

        # Assure the filename is correct
        self.assertIn("index.html", self.manager._helpLocation)

        # Invoke the action
        self.manager.actionDocumentation()

        # Check if show() got called
        self.assertTrue(QWebView.show.called)

    def testActionTutorial(self):
        """
        Menu Help/Tutorial
        """
        # Mock subprocess.Popen
        subprocess.Popen = MagicMock()

        tested_location = self.manager._tutorialLocation

        # Assure the filename is correct
        self.assertIn("Tutorial.pdf", tested_location)

        # Invoke the action
        self.manager.actionTutorial()

        # Check if popen() got called
        self.assertTrue(subprocess.Popen.called)

        #Check the popen() call arguments
        subprocess.Popen.assert_called_with([tested_location], shell=True)

    def testActionAcknowledge(self):
        """
        Menu Help/Acknowledge
        """
        self.manager.actionAcknowledge()

        # Check if the window is actually opened.
        self.assertTrue(self.manager.ackWidget.isVisible())
        self.assertIn("developers@sasview.org", self.manager.ackWidget.label.text())

    def testActionCheck_for_update(self):
        """
        Menu Help/Check for update
        """
        # Just make sure checkUpdate is called.
        self.manager.checkUpdate = MagicMock()

        self.manager.actionCheck_for_update()

        self.assertTrue(self.manager.checkUpdate.called)
             
       
if __name__ == "__main__":
    unittest.main()