/*

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

 See LICENSE.txt for this sample’s licensing information

 Abstract:

  AAPLCoolPresentationController implementation.

 */

#import "AAPLCoolPresentationController.h"

@implementation AAPLCoolPresentationController

- (instancetype)initWithPresentedViewController:(UIViewController *)presentedViewController presentingViewController:(UIViewController *)presentingViewController

{

    self = [super initWithPresentedViewController:presentedViewController presentingViewController:presentingViewController];

    if(self)

    {

        // Create our dimming view

        _dimmingView = [[UIView alloc] init];

        [[self dimmingView] setBackgroundColor:[[UIColor purpleColor] colorWithAlphaComponent:0.4]];

        // Create our other chrome

        _bigFlowerImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"BigFlower"]];

        _carlImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Carl"]];

        [[self carlImageView] setFrame:CGRectMake(0,0,500,245)];

        _jaguarPrintImageH = [[UIImage imageNamed:@"JaguarH"] resizableImageWithCapInsets:UIEdgeInsetsZero resizingMode:UIImageResizingModeTile];

        _jaguarPrintImageV = [[UIImage imageNamed:@"JaguarV"] resizableImageWithCapInsets:UIEdgeInsetsZero resizingMode:UIImageResizingModeTile];

        _topJaguarPrintImageView = [[UIImageView alloc] initWithImage:[self jaguarPrintImageH]];

        _bottomJaguarPrintImageView = [[UIImageView alloc] initWithImage:[self jaguarPrintImageH]];

        _leftJaguarPrintImageView = [[UIImageView alloc] initWithImage:[self jaguarPrintImageV]];

        _rightJaguarPrintImageView = [[UIImageView alloc] initWithImage:[self jaguarPrintImageV]];

    }

    return self;

}

- (CGRect)frameOfPresentedViewInContainerView

{

    // Return a frame that's centered in the display, with a width of 300pt and a height which varies based on our vertical size class

    CGRect containerBounds = [[self containerView] bounds];

    CGRect presentedViewFrame = CGRectZero;

    CGFloat width = 300;

    CGFloat height = ([[self traitCollection] verticalSizeClass] == UIUserInterfaceSizeClassCompact) ? 300 : containerBounds.size.height - (2 * [self jaguarPrintImageH].size.height);

    presentedViewFrame.size = CGSizeMake(width, height);

    presentedViewFrame.origin = CGPointMake(containerBounds.size.width / 2.0, containerBounds.size.height / 2.0);

    presentedViewFrame.origin.x -= presentedViewFrame.size.width / 2.0;

    presentedViewFrame.origin.y -= presentedViewFrame.size.height / 2.0;

    return presentedViewFrame;

}

- (void)presentationTransitionWillBegin

{

    [super presentationTransitionWillBegin];

    // Add our chrome to the dimming view

    [self addViewsToDimmingView];

    // Before the presentation begins, we want to have our dimming view be totally transparent

    [[self dimmingView] setAlpha:0.0];

    // Alongside the view controller presentation animation, we want to fade the dimming view to

    // be opaque. We can do so by animating alongside the current transition on the presented

    // view controller

    [[[self presentedViewController] transitionCoordinator] animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {

        [[self dimmingView] setAlpha:1.0];

    } completion:nil];

    // Using a custom animation, animate in our jaguar print

    [self moveJaguarPrintToPresentedPosition:NO];

    [UIView animateWithDuration:1.0 animations:^{

        [self moveJaguarPrintToPresentedPosition:YES];

    }];

}

- (void)containerViewWillLayoutSubviews

{

    [[self dimmingView] setFrame:[[self containerView] bounds]];

    [[self presentedView] setFrame:[self frameOfPresentedViewInContainerView]];

    [self moveJaguarPrintToPresentedPosition:YES];

}

- (void)containerViewDidLayoutSubviews

{

    CGPoint bigFlowerCenter = [[self dimmingView] frame].origin;

    bigFlowerCenter.x += [[[self bigFlowerImageView] image] size].width / 4.0;

    bigFlowerCenter.y += [[[self bigFlowerImageView] image] size].height / 4.0;

    [[self bigFlowerImageView] setCenter:bigFlowerCenter];

    CGRect carlFrame = [[self carlImageView] frame];

    carlFrame.origin.y = [[self dimmingView] bounds].size.height - carlFrame.size.height;

    [[self carlImageView] setFrame:carlFrame];

}

- (void)dismissalTransitionWillBegin

{

    [super dismissalTransitionWillBegin];

    // In -dismissalTransitionWillBegin, we want to undo what we did in

    // -presentationTransitionWillBegin. Fade our dimming view's alpha back to 0

    [[[self presentedViewController] transitionCoordinator] animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {

        [[self dimmingView] setAlpha:0.0];

} completion:nil];

}

- (void)addViewsToDimmingView

{

    // We only want the flower and Carl if we have enough space. Only add them

    // if both of our size classes are Regular

    if(([[self traitCollection] horizontalSizeClass] == UIUserInterfaceSizeClassRegular) &&

       ([[self traitCollection] verticalSizeClass] == UIUserInterfaceSizeClassRegular))

    {

        [[self dimmingView] addSubview:[self bigFlowerImageView]];

        [[self dimmingView] addSubview:[self carlImageView]];

    }

    [[self dimmingView] addSubview:[self topJaguarPrintImageView]];

    [[self dimmingView] addSubview:[self bottomJaguarPrintImageView]];

    [[self dimmingView] addSubview:[self leftJaguarPrintImageView]];

    [[self dimmingView] addSubview:[self rightJaguarPrintImageView]];

    [[self containerView] addSubview:[self dimmingView]];

}

- (void)moveJaguarPrintToPresentedPosition:(BOOL)presentedPosition

{

    CGSize horizontalJaguarSize = [[self jaguarPrintImageH] size];

    CGSize verticalJaguarSize = [[self jaguarPrintImageV] size];

    CGRect frameOfView = [self frameOfPresentedViewInContainerView];

    CGRect containerFrame = [[self containerView] frame];

    CGRect topFrame, bottomFrame, leftFrame, rightFrame;

    topFrame.size.height = bottomFrame.size.height = horizontalJaguarSize.height;

    topFrame.size.width = bottomFrame.size.width = frameOfView.size.width;

    leftFrame.size.width = rightFrame.size.width = verticalJaguarSize.width;

    leftFrame.size.height = rightFrame.size.height = frameOfView.size.height;

    topFrame.origin.x = frameOfView.origin.x;

    bottomFrame.origin.x = frameOfView.origin.x;

    leftFrame.origin.y = frameOfView.origin.y;

    rightFrame.origin.y = frameOfView.origin.y;

    CGRect frameToAlignAround = presentedPosition ? frameOfView : containerFrame;

    topFrame.origin.y = CGRectGetMinY(frameToAlignAround) - horizontalJaguarSize.height;

    bottomFrame.origin.y = CGRectGetMaxY(frameToAlignAround);

    leftFrame.origin.x = CGRectGetMinX(frameToAlignAround) - verticalJaguarSize.width;

    rightFrame.origin.x = CGRectGetMaxX(frameToAlignAround);

    [[self topJaguarPrintImageView] setFrame:topFrame];

    [[self bottomJaguarPrintImageView] setFrame:bottomFrame];

    [[self leftJaguarPrintImageView] setFrame:leftFrame];

    [[self rightJaguarPrintImageView] setFrame:rightFrame];

}

@end