/*

     File: ASCSlideAnimationEvents.m

 Abstract: Animation events slide.

  Version: 1.1

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#import "ASCPresentationViewController.h"

#import "ASCSlideTextManager.h"

#import "ASCSlide.h"

#import "Utils.h"

typedef NS_ENUM(NSInteger, ASCCharacterAnimation) {

    ASCCharacterAnimationAttack = 0,

    ASCCharacterAnimationWalk,

    ASCCharacterAnimationDie,

    ASCCharacterAnimationCount

};

@interface ASCSlideAnimationEvents : ASCSlide

@end

@implementation ASCSlideAnimationEvents {

    SCNNode *_heroSkeletonNode;

    CAAnimation *_animations[ASCCharacterAnimationCount];

}

- (void)setupSlideWithPresentationViewController:(ASCPresentationViewController *)presentationViewController {

    // Load the character and add it to the scene

    SCNNode *heroNode = [self.groundNode asc_addChildNodeNamed:@"heroGroup" fromSceneNamed:@"hero" withScale:0.0];

    heroNode.scale = SCNVector3Make(0.023, 0.023, 0.023);

    heroNode.position = SCNVector3Make(0.0, 0.0, 15.0);

    heroNode.rotation = SCNVector4Make(1.0, 0.0, 0.0, -M_PI_2);

    [self.groundNode addChildNode:heroNode];

    // Convert sceneTime-based animations into systemTime-based animations.

    // Animations loaded from DAE files will play according to the `currentTime` property of the scene renderer if this one is playing

    // (see the SCNSceneRenderer protocol). Here we don't play a specific DAE so we want the animations to animate as soon as we add

    // them to the scene (i.e have them to play according the time of the system when the animation was added).

    _heroSkeletonNode = [heroNode childNodeWithName:@"skeleton" recursively:YES];

    for (NSString *animationKey in _heroSkeletonNode.animationKeys) {

        // Find all the animations. Make them system time based and repeat forever.

        // And finally replace the old animation.

        CAAnimation *animation = [_heroSkeletonNode animationForKey:animationKey];

        animation.usesSceneTimeBase = NO;

        animation.repeatCount = FLT_MAX;

        [_heroSkeletonNode addAnimation:animation forKey:animationKey];

    }

    // Load other animations so that we will use them later

    [self setAnimation:ASCCharacterAnimationAttack withAnimationNamed:@"attackID" fromSceneNamed:@"attack"];

    [self setAnimation:ASCCharacterAnimationDie withAnimationNamed:@"DeathID" fromSceneNamed:@"death"];

    [self setAnimation:ASCCharacterAnimationWalk withAnimationNamed:@"WalkID" fromSceneNamed:@"walk"];

}

- (NSUInteger)numberOfSteps {

    return 5;

}

- (void)presentStepIndex:(NSUInteger)index withPresentionViewController:(ASCPresentationViewController *)presentationViewController {

    switch (index) {

        case 0:

        {

            self.textManager.title = @"Animation Events";

            [self.textManager addBullet:@"SCNAnimationEvent" atLevel:0];

            [self.textManager addCode:

             @"#SCNAnimationEvent# *anEvent = \n"

             @"  [SCNAnimationEvent #animationEventWithKeyTime:#0.2 #block:#aBlock]; \n"

             @"anAnimation.#animationEvents# = @[anEvent, anotherEvent];"];

            // Warm up NSSound by playing an empty sound.

            // Otherwise the first sound may take some time to start playing and will be desynchronised.

            [[NSSound soundNamed:@"emptySound"] play];

            break;

        }

        case 1:

        case 2:

        {

            // Trigger the attack animation

            [_heroSkeletonNode addAnimation:_animations[ASCCharacterAnimationAttack] forKey:@"attack"];

            break;

        }

        case 3:

        {

            // Trigger the walk animation

            [_heroSkeletonNode addAnimation:_animations[ASCCharacterAnimationWalk] forKey:@"walk"];

            break;

        }

        case 4:

        {

            // Trigger the death animation

            // Make sure to remove the "idle" animation and prevent the model from intersecting with the floor.

            [_heroSkeletonNode removeAllAnimations];

            [_heroSkeletonNode addAnimation:_animations[ASCCharacterAnimationDie] forKey:@"death"];

            [SCNTransaction begin];

            {

                _heroSkeletonNode.parentNode.transform = CATransform3DTranslate(_heroSkeletonNode.parentNode.transform, 0, 0, 40);

            }

            [SCNTransaction commit];

            break;

        }

    }

}

- (void)setAnimation:(ASCCharacterAnimation)index withAnimationNamed:(NSString *)animationName fromSceneNamed:(NSString *)sceneName {

    // Load the DAE using SCNSceneSource in order to be able to retrieve the animation by its identifier

    NSURL *url = [[NSBundle mainBundle] URLForResource:sceneName withExtension:@"dae"];

    SCNSceneSource *sceneSource = [SCNSceneSource sceneSourceWithURL:url options:nil];

    CAAnimation *animation = [sceneSource entryWithIdentifier:animationName withClass:[CAAnimation class]];

    _animations[index] = animation;

    // Blend animations for smoother transitions

    [animation setFadeInDuration:0.3];

    [animation setFadeOutDuration:0.3];

    if (index == ASCCharacterAnimationDie) {

        // We want the "death" animation to remain at its final state at the end of the animation

        animation.removedOnCompletion = NO;

        animation.fillMode = kCAFillModeBoth;

        // Create animation events and set them to the animation

        SCNAnimationEventBlock swipeSoundEventBlock = ^(CAAnimation *animation, id animatedObject, BOOL playingBackward) {

            [[NSSound soundNamed:@"swipe"] play];

        };

        SCNAnimationEventBlock deathSoundEventBlock = ^(CAAnimation *animation, id animatedObject, BOOL playingBackward) {

            [[NSSound soundNamed:@"death"] play];

        };

        animation.animationEvents = @[[SCNAnimationEvent animationEventWithKeyTime:0.0 block:swipeSoundEventBlock],

                                      [SCNAnimationEvent animationEventWithKeyTime:0.3 block:deathSoundEventBlock]];

    }

    if (index == ASCCharacterAnimationAttack) {

        // Create an animation event and set it to the animation

        SCNAnimationEventBlock swordSoundEventBlock = ^(CAAnimation *animation, id animatedObject, BOOL playingBackward) {

            [[NSSound soundNamed:@"sword"] play];

        };

        animation.animationEvents = @[[SCNAnimationEvent animationEventWithKeyTime:0.4 block:swordSoundEventBlock]];

    }

    if (index == ASCCharacterAnimationWalk) {

        // Repeat the walk animation 3 times

        animation.repeatCount = 3;

        // Create an animation event and set it to the animation

        SCNAnimationEventBlock stepSoundEventBlock = ^(CAAnimation *animation, id animatedObject, BOOL playingBackward) {

            [[NSSound soundNamed:@"walk"] play];

        };

        animation.animationEvents = @[[SCNAnimationEvent animationEventWithKeyTime:0.2 block:stepSoundEventBlock],

                                      [SCNAnimationEvent animationEventWithKeyTime:0.7 block:stepSoundEventBlock]];

    }

}

@end