/*

 Copyright (C) 2018 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 A simple model class to display pins representing photos on the map.

 */

#import "PhotoAnnotation.h"

@import CoreLocation;

@implementation PhotoAnnotation

- (id)initWithImagePath:(NSString *)anImagePath title:(NSString *)aTitle coordinate:(CLLocationCoordinate2D)aCoordinate {

    self = [super init];

    if (self != nil) {

        self.imagePath = anImagePath;

        self.title = aTitle;

        self.coordinate = aCoordinate;

    }

    return self;

}

- (NSString *)title {

    if (self.containedAnnotations.count > 0) {

        return [NSString stringWithFormat:@"%zd Photos", self.containedAnnotations.count + 1];

    }

    return _title;

}

- (UIImage *)image {

    if (!_image && self.imagePath) {

        _image = [UIImage imageWithContentsOfFile:self.imagePath];

    }

    return _image;

}

- (NSString *)stringForPlacemark:(CLPlacemark *)placemark {

    NSMutableString *string = [[NSMutableString alloc] init];

    if (placemark.locality) {

        [string appendString:placemark.locality];

    }

    if (placemark.administrativeArea) {

        if (string.length > 0)

            [string appendString:@", "];

        [string appendString:placemark.administrativeArea];

    }

    if (string.length == 0 && placemark.name)

        [string appendString:placemark.name];

    return string;

}

- (void)updateSubtitleIfNeeded {

    if (self.subtitle == nil) {

        // for the subtitle, we reverse geocode the lat/long for a proper location string name

        CLLocation *location = [[CLLocation alloc] initWithLatitude:self.coordinate.latitude longitude:self.coordinate.longitude];

        CLGeocoder *geocoder = [[CLGeocoder alloc] init];

        [geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {

            if (placemarks.count > 0) {

                CLPlacemark *placemark = placemarks[0];

                self.subtitle = [NSString stringWithFormat:@"Near %@", [self stringForPlacemark:placemark]];

            }

        }];

    }

}

@end