/*

     File: CAUITransportView.mm

 Abstract: 

  Version: 1.1.2

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 */

#import "CAUITransportView.h"

@interface CAUITransportView ()

@property (nonatomic, assign) IBOutlet UILabel *currentTime;

@property (nonatomic, assign) IBOutlet CAUITransportButton *playPauseButton;

@property (nonatomic, assign) IBOutlet CAUITransportButton *recordButton;

@property (nonatomic, assign) IBOutlet CAUITransportButton *rewindButton;

@property (nonatomic, assign) IBOutlet UIImageView *hostIconView;

@end

@implementation CAUITransportView {

    UIImage                      *hostIcon;

    NSTimer                      *pollPlayerTimer;

    BOOL                         inForeground;

}

@synthesize engine = _engine;

@synthesize rewindButton;

@synthesize playPauseButton;

@synthesize recordButton;

@synthesize hostIconView;

@synthesize currentTime;

extern NSString *kTransportStateChangedNotification;

void displayAlertDialog(NSString *title, NSString *message);

#pragma mark Initialization/dealloc

- (void) awakeFromNib {

    rewindButton.drawingStyle    = rewindButtonStyle;

    playPauseButton.drawingStyle = pauseButtonStyle;

    recordButton.drawingStyle    = recordButtonStyle;

    rewindButton.fillColor       = [UIColor darkGrayColor].CGColor;

    playPauseButton.fillColor    = [UIColor darkGrayColor].CGColor;

    recordButton.fillColor       = [UIColor redColor].CGColor;

    UIApplicationState appstate = [UIApplication sharedApplication].applicationState;

    inForeground = (appstate != UIApplicationStateBackground);

    [[NSNotificationCenter defaultCenter] addObserver: self

                                             selector: @selector(appHasGoneInBackground)

                                                 name: UIApplicationDidEnterBackgroundNotification

                                               object: nil];

    [[NSNotificationCenter defaultCenter] addObserver: self

                                             selector: @selector(appHasGoneForeground)

                                                 name: UIApplicationWillEnterForegroundNotification

                                               object: nil];

    //Set touch listener on host icon

    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hostIconSelected:)];

    //Default value for cancelsTouchesInView is YES, which will prevent buttons to be clicked

    singleTap.cancelsTouchesInView = NO;

    [hostIconView addGestureRecognizer:singleTap];

}

- (void) dealloc {

    if (_engine)

        [((NSObject*)_engine) removeObserver:self forKeyPath:kTransportStateChangedNotification];

    [hostIcon release];

    [super dealloc];

}

- (void) setDelegateAddObserver:(id<CAUITransportEngine>) inDelegate {

    if (_engine != inDelegate) {

        if (_engine) 

            [((NSObject*)_engine) removeObserver:self forKeyPath:kTransportStateChangedNotification];

        [((NSObject*)_engine) release];

        _engine = (id)[((NSObject*)inDelegate) retain];

        [[NSNotificationCenter defaultCenter] addObserver: self

                                                 selector: @selector(updateTransportControls)

                                                     name: kTransportStateChangedNotification

                                                   object: _engine];

    }

}

#pragma mark IBActions

- (IBAction) togglePlayback:(id) sender {

    if (self.engine) {

        if (!self.engine.connected)

            displayAlertDialog(@"Error", @"Host not connected");

        else {

            [self.engine togglePlay];

            [self startPollingPlayer];

            [self updateTransportControls];

        }

    }

}

- (IBAction) toggleRecording:(id) sender {

    if (self.engine) {

        if (!self.engine.connected)

            displayAlertDialog(@"Error", @"Host not connected");

        else {

            [self.engine toggleRecord];

            [self updateTransportControls];

        }

    }

}

- (IBAction) rewindAction:(id) sender {

    if (self.engine) {

        if(!self.engine.connected)

            displayAlertDialog(@"Error", @"Host not connected");

        else {

            [self.engine rewind];

            [self updateTransportControls];

        }

    }

}

#pragma mark Activation behavior

- (void) appHasGoneInBackground {

    inForeground = NO;

    [self stopPollingPlayer];

}

- (void) appHasGoneForeground {

    inForeground = YES;

    if (self.engine && [self.engine isHostPlaying])

        [self startPollingPlayer];

    else 

        [self stopPollingPlayer];

    [self updateTransportControls];

}

#pragma mark Control updating

- (void) updateTransportControls {

    if (self.engine) {

        if ([self.engine isHostConnected]) {

            if (!hostIcon)

                hostIcon =  [self.engine getAudioUnitIcon];

            if (hostIcon) {

                hostIconView.userInteractionEnabled = YES;

                [hostIconView setImage:hostIcon];

                hostIconView.contentMode = UIViewContentModeCenter;

            }

            recordButton.drawingStyle    = [self.engine isHostRecording] ? recordEnabledButtonStyle : recordButtonStyle;

            playPauseButton.drawingStyle = [self.engine isHostPlaying]   ? pauseButtonStyle         : playButtonStyle;

            [recordButton setEnabled: [self.engine canRecord]];

            [currentTime setText: [self.engine getPlayTimeString]];

            self.hidden = NO;

        } else

            self.hidden = YES;

        [self setNeedsDisplay];

    }

}

- (void) stopPollingPlayer {

    if (pollPlayerTimer) {

        [pollPlayerTimer invalidate];

        pollPlayerTimer = NULL;

    }

}

- (void) startPollingPlayer {

    if (self.engine && [self.engine isHostConnected] && inForeground ) {

        if (!pollPlayerTimer) {

            pollPlayerTimer =  [NSTimer scheduledTimerWithTimeInterval: 0.05

                                                                target: self

                                                              selector: @selector(pollHost)

                                                              userInfo: nil

                                                               repeats: YES];

        }

    }

}

- (void) pollHost {

    if (self.engine)

        [currentTime setText:[self.engine getPlayTimeString]];

}

- (void) hostIconSelected:(UITapGestureRecognizer *) gesture {

    if (self.engine)

        [self.engine gotoHost];

}

@end