/*

Copyright (C) 2015 Apple Inc. All Rights Reserved.

See LICENSE.txt for this sample’s licensing information

Abstract:

A simple view controller that manages a content view and an ADBannerView.

*/

#import "TextViewController.h"

@interface TextViewController ()

@property (nonatomic, copy) NSString *text;

@property (nonatomic, weak) IBOutlet UIView *contentView;

// contentView's vertical bottom constraint, used to alter the contentView's vertical size when ads arrive

@property (nonatomic, weak) IBOutlet NSLayoutConstraint *bottomConstraint;

@property (nonatomic, weak) IBOutlet UITextView *textView;

@property (nonatomic, weak) IBOutlet UILabel *timerLabel;

@property (nonatomic, strong) ADBannerView *bannerView;

@property (nonatomic, strong) NSTimer *timer;

@property (nonatomic, assign) CFTimeInterval ticks;

@end

#pragma mark -

@implementation TextViewController

- (void)layoutAnimated:(BOOL)animated {

    CGRect contentFrame = self.view.bounds;

    // all we need to do is ask the banner for a size that fits into the layout area we are using

    CGSize sizeForBanner = [self.bannerView sizeThatFits:contentFrame.size];

    // compute the ad banner frame

    CGRect bannerFrame = self.bannerView.frame;

    if (self.bannerView.bannerLoaded) {

        // bring the ad into view

        contentFrame.size.height -= sizeForBanner.height;   // shrink down content frame to fit the banner below it

        bannerFrame.origin.y = contentFrame.size.height;

        bannerFrame.size.height = sizeForBanner.height;

        bannerFrame.size.width = sizeForBanner.width;

        // if the ad is available and loaded, shrink down the content frame to fit the banner below it,

        // we do this by modifying the vertical bottom constraint constant to equal the banner's height

        //

        NSLayoutConstraint *verticalBottomConstraint = self.bottomConstraint;

        verticalBottomConstraint.constant = sizeForBanner.height;

        [self.view layoutSubviews];

    }

    else {

        // hide the banner off screen further off the bottom

        bannerFrame.origin.y = contentFrame.size.height;

    }

    [UIView animateWithDuration:animated ? 0.25 : 0.0 animations:^{

        [self.contentView layoutIfNeeded];

        self.bannerView.frame = bannerFrame;

    }];

}

- (void)setText:(NSString *)text {

    _text = [text copy];

    self.textView.text = text;

}

- (void)startTimer {

    if (self.timer == nil) {

        self.timer = [NSTimer scheduledTimerWithTimeInterval:0.1

                                                  target:self

                                                selector:@selector(timerTick:)

                                                userInfo:nil

                                                 repeats:YES];

    }

}

- (void)stopTimer {

    [self.timer invalidate];

    self.timer = nil;

}

- (void)timerTick:(NSTimer *)timer {

    // Timers are not guaranteed to tick at the nominal rate specified, so this isn't technically accurate.

    // However, this is just an example to demonstrate how to stop some ongoing activity, so we can live with that inaccuracy.

    self.ticks += 0.1;

    double seconds = fmod(self.ticks, 60.0);

    double minutes = fmod(trunc(self.ticks / 60.0), 60.0);

    double hours = trunc(self.ticks / 3600.0);

    self.timerLabel.text = [NSString stringWithFormat:@"%02.0f:%02.0f:%04.1f", hours, minutes, seconds];

}

- (void)viewDidLoad {

    [super viewDidLoad];

    // On iOS 6 ADBannerView introduces a new initializer, use it when available.

    if ([ADBannerView instancesRespondToSelector:@selector(initWithAdType:)]) {

        _bannerView = [[ADBannerView alloc] initWithAdType:ADAdTypeBanner];

    }

    else {

        _bannerView = [[ADBannerView alloc] init];

    }

    self.bannerView.delegate = self;

    [self.view addSubview:self.bannerView];

    NSDictionary *ipsums =

        [NSDictionary dictionaryWithContentsOfURL:[[NSBundle mainBundle] URLForResource:@"ipsums" withExtension:@"plist"]];

    self.text = ipsums[@"Original"];

    self.textView.text = self.text;

}

- (void)viewDidAppear:(BOOL)animated {

    [super viewDidAppear:animated];

    [self layoutAnimated:NO];

    [self startTimer];

}

- (void)viewDidDisappear:(BOOL)animated {

    [super viewDidDisappear:animated];

    [self stopTimer];

}

- (void)viewDidLayoutSubviews {

    [self layoutAnimated:[UIView areAnimationsEnabled]];

}

- (void)bannerViewDidLoadAd:(ADBannerView *)banner {

    [self layoutAnimated:YES];

}

- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error {

    NSLog(@"didFailToReceiveAdWithError %@", error);

    [self layoutAnimated:YES];

}

- (BOOL)bannerViewActionShouldBegin:(ADBannerView *)banner willLeaveApplication:(BOOL)willLeave {

    [self stopTimer];

    return YES;

}

- (void)bannerViewActionDidFinish:(ADBannerView *)banner {

    [self startTimer];

}

@end