/*

     File: APLRangingViewController.m

 Abstract: View controller that illustrates how to start and stop ranging for a beacon region.

  Version: 1.1

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 */

#import "APLRangingViewController.h"

#import "APLDefaults.h"

@import CoreLocation;

@interface APLRangingViewController () <CLLocationManagerDelegate>

@property NSMutableDictionary *beacons;

@property CLLocationManager *locationManager;

@property NSMutableDictionary *rangedRegions;

@end

@implementation APLRangingViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.beacons = [[NSMutableDictionary alloc] init];

    // This location manager will be used to demonstrate how to range beacons.

    self.locationManager = [[CLLocationManager alloc] init];

    self.locationManager.delegate = self;

    // Populate the regions we will range once.

    self.rangedRegions = [[NSMutableDictionary alloc] init];

    for (NSUUID *uuid in [APLDefaults sharedDefaults].supportedProximityUUIDs)

    {

        CLBeaconRegion *region = [[CLBeaconRegion alloc] initWithProximityUUID:uuid identifier:[uuid UUIDString]];

        self.rangedRegions[region] = [NSArray array];

    }

}

- (void)viewDidAppear:(BOOL)animated

{

    [super viewDidAppear:animated];

    // Start ranging when the view appears.

    for (CLBeaconRegion *region in self.rangedRegions)

    {

        [self.locationManager startRangingBeaconsInRegion:region];

    }

}

- (void)viewDidDisappear:(BOOL)animated

{

    [super viewDidDisappear:animated];

    // Stop ranging when the view goes away.

    for (CLBeaconRegion *region in self.rangedRegions)

    {

        [self.locationManager stopRangingBeaconsInRegion:region];

    }

}

#pragma mark - Location manager delegate

- (void)locationManager:(CLLocationManager *)manager didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region

{

    /*

     CoreLocation will call this delegate method at 1 Hz with updated range information.

     Beacons will be categorized and displayed by proximity.  A beacon can belong to multiple

     regions.  It will be displayed multiple times if that is the case.  If that is not desired,

     use a set instead of an array.

     */

    self.rangedRegions[region] = beacons;

    [self.beacons removeAllObjects];

    NSMutableArray *allBeacons = [NSMutableArray array];

    for (NSArray *regionResult in [self.rangedRegions allValues])

    {

        [allBeacons addObjectsFromArray:regionResult];

    }

    for (NSNumber *range in @[@(CLProximityUnknown), @(CLProximityImmediate), @(CLProximityNear), @(CLProximityFar)])

    {

        NSArray *proximityBeacons = [allBeacons filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"proximity = %d", [range intValue]]];

        if([proximityBeacons count])

        {

            self.beacons[range] = proximityBeacons;

        }

    }

    [self.tableView reloadData];

}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    return self.beacons.count;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    NSArray *sectionValues = [self.beacons allValues];

    return [sectionValues[section] count];

}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section

{

    NSString *title;

    NSArray *sectionKeys = [self.beacons allKeys];

    // The table view will display beacons by proximity.

    NSNumber *sectionKey = sectionKeys[section];

    switch([sectionKey integerValue])

    {

        case CLProximityImmediate:

            title = NSLocalizedString(@"Immediate", @"Immediate section header title");

            break;

        case CLProximityNear:

            title = NSLocalizedString(@"Near", @"Near section header title");

            break;

        case CLProximityFar:

            title = NSLocalizedString(@"Far", @"Far section header title");

            break;

        default:

            title = NSLocalizedString(@"Unknown", @"Unknown section header title");

            break;

    }

    return title;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    static NSString *identifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];

    // Display the UUID, major, minor and accuracy for each beacon.

    NSNumber *sectionKey = [self.beacons allKeys][indexPath.section];

    CLBeacon *beacon = self.beacons[sectionKey][indexPath.row];

    cell.textLabel.text = [beacon.proximityUUID UUIDString];

    NSString *formatString = NSLocalizedString(@"Major: %@, Minor: %@, Acc: %.2fm", @"Format string for ranging table cells.");

    cell.detailTextLabel.text = [NSString stringWithFormat:formatString, beacon.major, beacon.minor, beacon.accuracy];

    return cell;

}

@end