#import "ASCPresentation.h"

#import "ASCTextManager.h"

#import "ASCSlide.h"

#import "Utils.h"

#define TEST_13810403 0

@interface SlideShaderModifiers ()

@property (retain) SCNNode *virus;

@end

@implementation ASCSlideShaderModifiers

- (void) setup:(ASCPresentation *)controller

{

    ASCTextManager *text = [self textManager];

    [text addText:@"Shader Modifiers" withType:ASCTextTypeTitle level:0];

    [text addText:@"Inject custom GLSL code" withType:ASCTextTypeBullet level:0];

    [text addText:@"Combines with Scene Kit’s rendering" withType:ASCTextTypeBullet level:0];

    [text addText:@"Inject at specific entry points" withType:ASCTextTypeBullet level:0];

    SCNSphere *sphereGeom = [SCNSphere sphereWithRadius:3];

    [sphereGeom setSegmentCount:150];

    self.virus = [SCNNode nodeWithGeometry:sphereGeom];

    self.virus.geometry = sphereGeom;

    self.virus.position = SCNVector3Make(3, 4, 7);

    [self.ground addChildNode:self.virus];

    //redraw forever

    controller.view.playing = YES;

    controller.view.loops = YES;

    NSString *geomSrc = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"sm_geom" ofType:@"shader"] encoding:NSUTF8StringEncoding error:nil];

    NSString *surfSrc = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"sm_surf" ofType:@"shader"] encoding:NSUTF8StringEncoding error:nil];

    NSString *liteSrc = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"sm_light" ofType:@"shader"] encoding:NSUTF8StringEncoding error:nil];

    NSString *fragSrc = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"sm_frag" ofType:@"shader"] encoding:NSUTF8StringEncoding error:nil];

    self.virus.geometry.firstMaterial.specular.contents = [NSColor whiteColor];

    self.virus.geometry.firstMaterial.shaderModifiers = @{

                                                    SCNShaderModifierEntryPointGeometry : geomSrc,

                                                    SCNShaderModifierEntryPointSurface : surfSrc,

                                                    SCNShaderModifierEntryPointLightingModel : liteSrc,

                                                    SCNShaderModifierEntryPointFragment : fragSrc

                                                    };

    //start hidden

    self.virus.opacity = 0.0;

}

- (NSUInteger) numberOfSteps

{

    return 7;

}

- (void) presentStepIndex:(NSUInteger)index withController:(ASCPresentation *)controller

{

    ASCTextManager *text = self.textManager;

    [SCNTransaction begin];

    switch (index) {

        case 0:

            controller.showNewBadge = YES;

            break;

        case 1:

        {

            [text flipOutTextType:ASCTextTypeBullet];

            [text addText:@"Entry Points" withType:ASCTextTypeSubTitle level:0];

            [text addText:@"Geometry" withType:ASCTextTypeBullet level:0];

            [text addText:@"Surface" withType:ASCTextTypeBullet level:0];

            [text addText:@"Lighting" withType:ASCTextTypeBullet level:0];

            [text addText:@"Fragment" withType:ASCTextTypeBullet level:0];

            [text flipInTextType:ASCTextTypeBullet];

        }

            break;

        case 2: // Geometry

        {

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:1];

            self.virus.opacity = 1.0;

            [self.virus.geometry.firstMaterial setValue:@1.0 forKey:@"geomIntensity"];

            [SCNTransaction commit];

            //geometry

            [text highlightBulletAtIndex:0];

            //add code

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0];

            SCNVector3 textPos = SCNVector3Make(8, 8, 0);

            SCNNode *textNode = [text addText:@"myMaterial.shaderModifiers = @{" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    #SCNShaderModifierEntryPointGeometry# : " withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    @\"float len = length(#_geometry#.position.xy);" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    _geometry.position.z = sin(6.0 * (len + u_time));" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    [...] \"};" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            [SCNTransaction commit];

        }

            break;

        case 3: // Surface

        {

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:1];

            [self.virus.geometry.firstMaterial setValue:@1.0 forKey:@"surfIntensity"];

            [SCNTransaction commit];

            //remove code

            [text fadeOutTextType:ASCTextTypeCode];

            [text highlightBulletAtIndex:1];

            // Add Code example

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0];

            SCNVector3 textPos = SCNVector3Make(8, 6, 0);

            SCNNode *textNode = [text addText:@"myMaterial.shaderModifiers = @{" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    #SCNShaderModifierEntryPointSurface# : " withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    @\"#uniform# float myFactor=1.0;" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    [...] \"};" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            [SCNTransaction commit];

        }

        break;

        case 4: // Lighting

        {

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:1];

            [self.virus.geometry.firstMaterial setValue:@1.0 forKey:@"lightIntensity"];

            [SCNTransaction commit];

            [text fadeOutTextType:ASCTextTypeCode];

            [text highlightBulletAtIndex:2];

            // Add Code example

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0];

            SCNVector3 textPos = SCNVector3Make(8, 6, 0);

            SCNNode *textNode = [text addText:@"myMaterial.shaderModifiers = @{" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    #SCNShaderModifierEntryPointLighting# : " withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    @\"#uniform# float myFactor=1.0;" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    [...] \"};" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            [SCNTransaction commit];

        } break;

        case 5: // Fragment

        {

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:1];

            [self.virus.geometry.firstMaterial setValue:@1.0 forKey:@"fragIntensity"];

            [SCNTransaction commit];

            [text fadeOutTextType:ASCTextTypeCode];

            [text highlightBulletAtIndex:3];

            // Add Code example

            [SCNTransaction begin];

            [SCNTransaction setAnimationDuration:0];

            SCNVector3 textPos = SCNVector3Make(8, 6, 0);

            SCNNode *textNode = [text addText:@"myMaterial.shaderModifiers = @{" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    #SCNShaderModifierEntryPointFragment# : " withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    @\"#uniform# float myFactor=1.0;" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            textNode = [text addText:@"    [...] \"};" withType:ASCTextTypeCode level:0];

            textNode.position = textPos;

            [SCNTransaction commit];

        }

            break;

        case 6: // Conclusion

        {

            [SCNTransaction setAnimationDuration:1.0];

            self.virus.opacity = 0.0;

            [text fadeOutTextType:ASCTextTypeCode];

            [text flipOutTextType:ASCTextTypeBullet];

            [text flipOutTextType:ASCTextTypeSubTitle];

            [text addText:@"SCNShadable" withType:ASCTextTypeSubTitle level:0];

            [text addText:@"Shaders parameters are animatable" withType:ASCTextTypeBullet level:0];

            [text addText:@"protocol adopted by SCNMaterial and SCNGeometry" withType:ASCTextTypeBullet level:0];

            [text flipInTextType:ASCTextTypeSubTitle];

            [text flipInTextType:ASCTextTypeBullet];

        } break;

    }

    [SCNTransaction commit];

}

//- (NSArray *) lightIntensities

//{

//    return @[@0.0, @0.0, @1.0];

//}

- (void) orderOut:(ASCPresentation *)controller

{

    controller.view.playing = NO;

}

@end