/*

 Copyright (C) 2015 Apple Inc. All Rights Reserved.

  See LICENSE.txt for this sample’s licensing information

  Abstract:

  Displays an MKMapView and demonstrates how to use the included KMLParser class to place annotations and overlays from a parsed KML file on top of the MKMapView. 

 */

@import MapKit;

#import "KMLParser.h"

#import "KMLViewerViewController.h"

@interface KMLViewerViewController ()

@property (nonatomic, weak) IBOutlet MKMapView *map;

@property (nonatomic, strong) KMLParser *kmlParser;

@end

@implementation KMLViewerViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Locate the path to the route.kml file in the application's bundle

    // and parse it with the KMLParser.

    NSString *path = [[NSBundle mainBundle] pathForResource:@"KML_Sample" ofType:@"kml"];

    NSURL *url = [NSURL fileURLWithPath:path];

    self.kmlParser = [[KMLParser alloc] initWithURL:url];

    [self.kmlParser parseKML];

    // Add all of the MKOverlay objects parsed from the KML file to the map.

    NSArray *overlays = [self.kmlParser overlays];

    [self.map addOverlays:overlays];

    // Add all of the MKAnnotation objects parsed from the KML file to the map.

    NSArray *annotations = [self.kmlParser points];

    [self.map addAnnotations:annotations];

    // Walk the list of overlays and annotations and create a MKMapRect that

    // bounds all of them and store it into flyTo.

    MKMapRect flyTo = MKMapRectNull;

    for (id <MKOverlay> overlay in overlays) {

        if (MKMapRectIsNull(flyTo)) {

            flyTo = [overlay boundingMapRect];

        } else {

            flyTo = MKMapRectUnion(flyTo, [overlay boundingMapRect]);

        }

    }

    for (id <MKAnnotation> annotation in annotations) {

        MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);

        MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0, 0);

        if (MKMapRectIsNull(flyTo)) {

            flyTo = pointRect;

        } else {

            flyTo = MKMapRectUnion(flyTo, pointRect);

        }

    }

    // Position the map so that all overlays and annotations are visible on screen.

    self.map.visibleMapRect = flyTo;

}

#pragma mark MKMapViewDelegate

- (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay {

    return [self.kmlParser rendererForOverlay:overlay];

}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {

    return [self.kmlParser viewForAnnotation:annotation];

}

@end