/*

     File: RootViewController.m 

 Abstract: n/a 

  Version: 1.0.1 

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*/

#import "RootViewController.h"

@interface RootViewController ()

- (void)changeVideoQuality:(id)sender;

- (void)changeFlashMode:(id)sender;

- (void)changeCamera:(id)sender;

- (void)createImagePicker;

- (void)startRecording;

- (void)stopRecording;

- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo;

@end

@implementation RootViewController

#pragma mark -

#pragma mark View lifecycle

- (void)viewDidLoad {

    [super viewDidLoad];

    cameraSelectionButton.alpha = 0.0;

    flashModeButton.alpha = 0.0;

    recordIndicatorView.alpha = 0.0;

    [self createImagePicker];

    recordGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(toggleVideoRecording)];

    recordGestureRecognizer.numberOfTapsRequired = 2;

    [cameraOverlayView addGestureRecognizer:recordGestureRecognizer];

}

- (void)viewWillAppear:(BOOL)animated

{

    CGRect theRect = [imagePicker.view frame];

    [cameraOverlayView setFrame:theRect];

    [self presentViewController:imagePicker animated:animated completion:nil];

    imagePicker.cameraOverlayView = cameraOverlayView;

}

#pragma mark -

#pragma mark Memory management

- (void)didReceiveMemoryWarning {

    // Releases the view if it doesn't have a superview.

    [super didReceiveMemoryWarning];

    // Relinquish ownership any cached data, images, etc that aren't in use.

}

- (void)viewDidUnload {

    // Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.

    // For example: self.myOutlet = nil;

}

- (void)dealloc {

    [recordGestureRecognizer release];

    [super dealloc];

}

- (void)createImagePicker {

    imagePicker = [[UIImagePickerController alloc] init];

    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

    imagePicker.mediaTypes = [NSArray arrayWithObject:@"public.movie"];

    imagePicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;

    imagePicker.allowsEditing = NO;

    imagePicker.showsCameraControls = NO;

    imagePicker.cameraViewTransform = CGAffineTransformIdentity;

    // not all devices have two cameras or a flash so just check here

    if ( [UIImagePickerController isCameraDeviceAvailable: UIImagePickerControllerCameraDeviceRear] ) {

        imagePicker.cameraDevice = UIImagePickerControllerCameraDeviceRear;

        if ( [UIImagePickerController isCameraDeviceAvailable: UIImagePickerControllerCameraDeviceFront] ) {

            cameraSelectionButton.alpha = 1.0;

            showCameraSelection = YES;

        }

    } else {

        imagePicker.cameraDevice = UIImagePickerControllerCameraDeviceFront;

    }

    if ( [UIImagePickerController isFlashAvailableForCameraDevice:imagePicker.cameraDevice] ) {

        imagePicker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOff;

        flashModeButton.alpha = 1.0;

        showFlashMode = YES;

    }

    imagePicker.videoQuality = UIImagePickerControllerQualityType640x480;

    imagePicker.delegate = self;

    imagePicker.wantsFullScreenLayout = YES;

}

- (void)toggleVideoRecording {

    if (!recording) {

        recording = YES;

        [self startRecording];

    } else {

        recording = NO;

        [self stopRecording];

    }

}

- (void)changeVideoQuality:(id)sender {

    if (imagePicker.videoQuality == UIImagePickerControllerQualityType640x480) {

        imagePicker.videoQuality = UIImagePickerControllerQualityTypeHigh;

        [videoQualitySelectionButton setImage:[UIImage imageNamed:@"hd-selected.png"] forState:UIControlStateNormal];

    } else {

        imagePicker.videoQuality = UIImagePickerControllerQualityType640x480;

        [videoQualitySelectionButton setImage:[UIImage imageNamed:@"sd-selected.png"] forState:UIControlStateNormal];

    }

}

- (void)changeFlashMode:(id)sender {

    if (imagePicker.cameraFlashMode == UIImagePickerControllerCameraFlashModeOff) {

        imagePicker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;

        [flashModeButton setImage:[UIImage imageNamed:@"flash-on.png"] forState:UIControlStateNormal];

    } else {

        imagePicker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOff;

        [flashModeButton setImage:[UIImage imageNamed:@"flash-off.png"] forState:UIControlStateNormal];

    }

}

- (void)changeCamera:(id)sender {

    if (imagePicker.cameraDevice == UIImagePickerControllerCameraDeviceRear) {

        imagePicker.cameraDevice = UIImagePickerControllerCameraDeviceFront;

    } else {

        imagePicker.cameraDevice = UIImagePickerControllerCameraDeviceRear;

    }

    if ( ![UIImagePickerController isFlashAvailableForCameraDevice:imagePicker.cameraDevice] ) {

        [UIView animateWithDuration:0.3 animations:^(void) {flashModeButton.alpha = 0;}];

        showFlashMode = NO;

    } else {

        [UIView animateWithDuration:0.3 animations:^(void) {flashModeButton.alpha = 1.0;}];

        showFlashMode = YES;

    }

}

- (void)startRecording {

    void (^hideControls)(void);

    hideControls = ^(void) {

        cameraSelectionButton.alpha = 0;

        flashModeButton.alpha = 0;

        videoQualitySelectionButton.alpha = 0;

        recordIndicatorView.alpha = 1.0;

    };

    void (^recordMovie)(BOOL finished);

    recordMovie = ^(BOOL finished) {

        [imagePicker startVideoCapture];

    };

    // Hide controls

    [UIView  animateWithDuration:0.3 delay:0.0 options:UIViewAnimationOptionCurveEaseInOut animations:hideControls completion:recordMovie];

}

- (void)stopRecording {

    [imagePicker stopVideoCapture];

}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    NSURL *videoURL = [info valueForKey:UIImagePickerControllerMediaURL];

    NSString *pathToVideo = [videoURL path];

    BOOL okToSaveVideo = UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(pathToVideo);

    if (okToSaveVideo) {

        UISaveVideoAtPathToSavedPhotosAlbum(pathToVideo, self, @selector(video:didFinishSavingWithError:contextInfo:), NULL);

    } else {

        [self video:pathToVideo didFinishSavingWithError:nil contextInfo:NULL];

    }

}

- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {

    void (^showControls)(void);

    showControls = ^(void) {

        if (showCameraSelection) cameraSelectionButton.alpha = 1.0;

        if (showFlashMode) flashModeButton.alpha = 1.0;

        videoQualitySelectionButton.alpha = 1.0;

        recordIndicatorView.alpha = 0.0;

    };

    // Show controls

    [UIView  animateWithDuration:0.3 delay:0.0 options:UIViewAnimationOptionCurveEaseInOut animations:showControls completion:NULL];

}

@end