from Cocoa import *
from CoreData import *
import objc

class DragAppAppDelegate (NSObject):
    clubWindow = objc.IBOutlet()
    peopleWindow = objc.IBOutlet()
    
    _managedObjectModel = objc.ivar()
    _managedObjectContext = objc.ivar()
    _things = objc.ivar()

    def managedObjectModel(self):
        if self._managedObjectModel is None:
            allBundles = NSMutableSet.alloc().init()
            allBundles.addObject_(NSBundle.mainBundle())
            allBundles.addObjectsFromArray_(NSBundle.allFrameworks())
        
            self._managedObjectModel = NSManagedObjectModel.mergedModelFromBundles_(allBundles.allObjects())

        return self._managedObjectModel

    

    # Change this path/code to point to your App's data store.
    def applicationSupportFolder(self):
        paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, True)

        if len(paths) == 0:
            NSRunAlertPanel("Alert", "Can't find application support folder", 
                    "Quit", None, None)
            NSApplication.sharedApplication().terminate_(self)
        else:
            applicationSupportFolder = paths[0].stringByAppendingPathComponent_("DragApp")

        return applicationSupportFolder

    def managedObjectContext(self):
        if self._managedObjectContext is None:
            fileManager = NSFileManager.defaultManager()
            applicationSupportFolder = self.applicationSupportFolder()

            if not fileManager.fileExistsAtPath_isDirectory_(applicationSupportFolder, None)[0]:
                fileManager.createDirectoryAtPath_attributes_(
                        applicationSupportFolder, None)
            
            url = NSURL.fileURLWithPath_(
                    applicationSupportFolder.stringByAppendingPathComponent_(
                        "DragApp.xml"))

            coordinator = NSPersistentStoreCoordinator.alloc().initWithManagedObjectModel_(self.managedObjectModel())
            result, error = coordinator.addPersistentStoreWithType_configuration_URL_options_error_(NSXMLStoreType, None, url, None, None)
            if result:
                self._managedObjectContext = NSManagedObjectContext.alloc().init()
                self._managedObjectContext.setPersistentStoreCoordinator_(coordinator)
            else:
                NSApplication.sharedApplication().presentError_(error)
        
        return self._managedObjectContext
        

    def windowWillReturnUndoManager_(self, window):
        return self.managedObjectContext().undoManager()

    @objc.IBAction
    def saveAction_(self, sender):
        res, error = self.managedObjectContext().save_(None)
        if not res:
            NSApplication.sharedApplication().presentError_(error)

    def applicationShouldTerminate_(self, sender):
        context = self.managedObjectContext()

        reply = NSTerminateNow;

        if context is not None:
            if context.commitEditing():
                res, error = context.save_(None)
                if not res:
                    # This default error handling implementation should be 
                    # changed to make sure the error presented includes 
                    # application specific error recovery. For now, simply 
                    # display 2 panels.
                    errorResult = NSApplication.sharedApplication().presentError_(error)
                                    
                    if errorResult: # Then the error was handled
                        reply = NSTerminateCancel
                    else:
                        # Error handling wasn't implemented. Fall back to 
                        # displaying a "quit anyway" panel.
                        alertReturn = NSRunAlertPanel(None, "Could not save changes while quitting. Quit anyway?" , "Quit anyway", "Cancel", None)
                        if alertReturn == NSAlertAlternateReturn:
                            reply = NSTerminateCancel;	

            else:
                reply = NSTerminateCancel

        return reply