/*

 Copyright (C) 2014-2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 This is the main controller for the application. It instantiates and runs a presentation.

 */

#import "AAPLAppDelegate.h"

#import <IOKit/pwr_mgt/IOPMLib.h>

@implementation AAPLAppDelegate {

    AAPLPresentationViewController *_presentationViewController;

    IOPMAssertionID _assertionID;

}

- (void)applicationWillFinishLaunching:(NSNotification *)notification {

    [self disableDisplaySleeping];

    // Create a presentation from a plist file

    _presentationViewController = [[AAPLPresentationViewController alloc] initWithContentsOfFile:@"Scene Kit Presentation"];

    _presentationViewController.delegate = self;

    // Populate the 'Go' menu for direct access to slides

    [self populateGoMenu];

    // Start the presentation

    [self.window.contentView addSubview:_presentationViewController.presentationView];

    _presentationViewController.presentationView.frame = [self.window.contentView bounds];

    _presentationViewController.presentationView.autoresizingMask = NSViewWidthSizable | NSViewHeightSizable;

}

- (void) applicationDidFinishLaunching:(NSNotification *)notification

{

    [_presentationViewController applicationDidFinishLaunching];

}

- (void)applicationWillTerminate:(NSNotification *)notification {

    //restore default display settings

    [self enableDisplaySleeping];

}

#pragma mark - Presentation delegate

- (void)presentationViewController:(AAPLPresentationViewController *)presentationViewController willPresentSlideAtIndex:(NSUInteger)slideIndex step:(NSUInteger)step {

    // Update the window's title depending on the current slide

    if (step == 0) {

        self.window.title = [NSString stringWithFormat:@"SceneKit slide %ld", slideIndex];

    } else {

        self.window.title = [NSString stringWithFormat:@"SceneKit slide %ld step %ld", slideIndex, step];

    }

}

#pragma mark - 'Go' menu

- (void)populateGoMenu {

    for (NSUInteger i = 0; i < _presentationViewController.numberOfSlides; i++) {

        NSString *slideName = NSStringFromClass([_presentationViewController classOfSlideAtIndex:i]);

        NSRange prefixRange = NSMakeRange(0, @"AAPLSlide".length);

        NSString *title = [slideName stringByReplacingCharactersInRange:prefixRange withString:[NSString stringWithFormat:@"%lu ", (unsigned long)i]];

        NSMenuItem *item = [[NSMenuItem alloc] initWithTitle:title action:@selector(goTo:) keyEquivalent:@""];

        item.representedObject = @(i);

        [_goMenu addItem:item];

    }

}

#pragma mark - Actions

- (IBAction)nextSlide:(id)sender {

    [_presentationViewController goToNextSlideStep];

}

- (IBAction)previousSlide:(id)sender {

    [_presentationViewController goToPreviousSlide];

}

- (IBAction)goTo:(NSMenuItem *)sender {

    NSInteger index = [sender.representedObject integerValue];

    [_presentationViewController goToSlideAtIndex:index];

}

- (IBAction)exportSlidesToImages:(NSMenuItem *)sender {

    [_presentationViewController exportSlidesToImages:sender];

}

- (IBAction)exportSlidesToSCN:(NSMenuItem *)sender {

    [_presentationViewController exportSlidesToSCN:sender];

}

- (IBAction) autoPlay:(id) sender{

    [_presentationViewController autoPlay:sender];

}

- (IBAction)toggleCursor:(id)sender {

    static BOOL hidden = NO;

    if (hidden) {

        [NSCursor unhide];

        hidden = NO;

    } else {

        [NSCursor hide];

        hidden = YES;

    }

}

#pragma mark - NSApplicationDelegate

- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender {

    return YES;

}

#pragma mark - Sleep

- (void)disableDisplaySleeping {

    CFStringRef reasonForActivity = CFSTR("Scene Kit Presentation");

    IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep, kIOPMAssertionLevelOn, reasonForActivity, &_assertionID);

}

- (void)enableDisplaySleeping {

    if (_assertionID)

        IOPMAssertionRelease(_assertionID);

}

@end