/*

     File: APLConfigurationViewController.m

 Abstract: Illustrates how to configure an iOS device as a beacon.

  Version: 1.1

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 */

#import "APLConfigurationViewController.h"

#import "APLDefaults.h"

#import "APLUUIDViewController.h"

@import CoreLocation;

@import CoreBluetooth;

CBPeripheralManager *peripheralManager = nil;

CLBeaconRegion *region = nil;

NSNumber *power = nil;

@interface APLConfigurationViewController () <CBPeripheralManagerDelegate, UIAlertViewDelegate, UITextFieldDelegate>

@property (nonatomic, weak) IBOutlet UISwitch *enabledSwitch;

@property (nonatomic, weak) IBOutlet UITextField *uuidTextField;

@property (nonatomic, weak) IBOutlet UITextField *majorTextField;

@property (nonatomic, weak) IBOutlet UITextField *minorTextField;

@property (nonatomic, weak) IBOutlet UITextField *powerTextField;

@property BOOL enabled;

@property NSUUID *uuid;

@property NSNumber *major;

@property NSNumber *minor;

@property UIBarButtonItem *doneButton;

@property NSNumberFormatter *numberFormatter;

- (void)updateAdvertisedRegion;

@end

@implementation APLConfigurationViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneEditing:)];

    if(region)

    {

        self.uuid = region.proximityUUID;

        self.major = region.major;

        self.minor = region.minor;

    }

    else

    {

        self.uuid = [APLDefaults sharedDefaults].defaultProximityUUID;

        self.major = [NSNumber numberWithShort:0];

        self.minor = [NSNumber numberWithShort:0];

    }

    if(!power)

    {

        power = [APLDefaults sharedDefaults].defaultPower;

    }

    self.numberFormatter = [[NSNumberFormatter alloc] init];

    self.numberFormatter.numberStyle = NSNumberFormatterDecimalStyle;

}

- (void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:animated];

    if (!peripheralManager)

    {

        peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)];

    }

    else

    {

        peripheralManager.delegate = self;

    }

    // Refresh the enabled switch.

    self.enabled = self.enabledSwitch.on = peripheralManager.isAdvertising;

    self.uuidTextField.text = [self.uuid UUIDString];

    self.majorTextField.text = [self.major stringValue];

    self.minorTextField.text = [self.minor stringValue];

    self.powerTextField.text = [power stringValue];

}

-(void)viewWillDisappear:(BOOL)animated

{

    [super viewWillDisappear:animated];

    peripheralManager.delegate = nil;

}

- (void)peripheralManagerDidUpdateState:(CBPeripheralManager *)peripheral

{

}

#pragma mark - Text editing

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField

{

    if(textField == self.uuidTextField)

    {

        [self performSegueWithIdentifier:@"selectUUID" sender:self];

        return NO;

    }

    return YES;

}

- (void)textFieldDidBeginEditing:(UITextField *)textField

{

    self.navigationItem.rightBarButtonItem = self.doneButton;

}

- (void)textFieldDidEndEditing:(UITextField *)textField

{

    if(textField == self.majorTextField)

    {

        self.major = [self.numberFormatter numberFromString:textField.text];

    }

    else if(textField == self.minorTextField)

    {

        self.minor = [self.numberFormatter numberFromString:textField.text];

    }

    else if(textField == self.powerTextField)

    {

        power = [self.numberFormatter numberFromString:textField.text];

        // ensure the power is negative

        if([power intValue] > 0)

        {

            power = [NSNumber numberWithInt:-[power intValue]];

            textField.text = [power stringValue];

        }

    }

    self.navigationItem.rightBarButtonItem = nil;

    [self updateAdvertisedRegion];

}

- (IBAction)toggleEnabled:(UISwitch *)sender

{

    self.enabled = sender.on;

    [self updateAdvertisedRegion];

}

- (IBAction)doneEditing:(id)sender

{

    [self.majorTextField resignFirstResponder];

    [self.minorTextField resignFirstResponder];

    [self.powerTextField resignFirstResponder];

    [self.tableView reloadData];

}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

    if([[segue identifier] isEqualToString:@"selectUUID"])

    {

        APLUUIDViewController *uuidSelector = [segue destinationViewController];

        uuidSelector.uuid = self.uuid;

    }

}

- (IBAction)unwindUUIDSelector:(UIStoryboardSegue*)sender

{

    APLUUIDViewController *uuidSelector = [sender sourceViewController];

    self.uuid = uuidSelector.uuid;

    [self updateAdvertisedRegion];

}

- (void)updateAdvertisedRegion

{

    if(peripheralManager.state < CBPeripheralManagerStatePoweredOn)

    {

        NSString *title = NSLocalizedString(@"Bluetooth must be enabled", @"");

        NSString *message = NSLocalizedString(@"To configure your device as a beacon", @"");

        NSString *cancelButtonTitle = NSLocalizedString(@"OK", @"Cancel button title in configuration Save Changes");

        UIAlertView *errorAlert = [[UIAlertView alloc] initWithTitle:title message:message delegate:self cancelButtonTitle:cancelButtonTitle otherButtonTitles:nil];

        [errorAlert show];

        return;

    }

    [peripheralManager stopAdvertising];

    if(self.enabled)

    {

        // We must construct a CLBeaconRegion that represents the payload we want the device to beacon.

        NSDictionary *peripheralData = nil;

        region = [[CLBeaconRegion alloc] initWithProximityUUID:self.uuid major:[self.major shortValue] minor:[self.minor shortValue] identifier:BeaconIdentifier];

        peripheralData = [region peripheralDataWithMeasuredPower:power];

        // The region's peripheral data contains the CoreBluetooth-specific data we need to advertise.

        if(peripheralData)

        {

            [peripheralManager startAdvertising:peripheralData];

        }

    }

}

@end