//
//  RMAnnotation.m
//  MapView
//
// Copyright (c) 2008-2013, Route-Me Contributors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
//   list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

#import <CoreLocation/CoreLocation.h>

#import "RMGlobalConstants.h"
#import "RMAnnotation.h"
#import "RMMapView.h"
#import "RMMapLayer.h"
#import "RMQuadTree.h"

@interface RMQuadTreeNode (RMAnnotation)

- (void)annotationDidChangeBoundingBox:(RMAnnotation *)annotation;

@end

#pragma mark -

@implementation RMAnnotation

@synthesize coordinate;
@synthesize title;
@synthesize subtitle;
@synthesize userInfo;
@synthesize annotationType;
@synthesize annotationIcon, badgeIcon;
@synthesize anchorPoint;

@synthesize mapView;
@synthesize projectedLocation;
@synthesize projectedBoundingBox;
@synthesize hasBoundingBox;
@synthesize enabled, clusteringEnabled;
@synthesize position;
@synthesize quadTreeNode;
@synthesize isClusterAnnotation=_isClusterAnnotation;
@synthesize clusteredAnnotations;
@synthesize isUserLocationAnnotation;

+ (instancetype)annotationWithMapView:(RMMapView *)aMapView coordinate:(CLLocationCoordinate2D)aCoordinate andTitle:(NSString *)aTitle
{
    return [[self alloc] initWithMapView:aMapView coordinate:aCoordinate andTitle:aTitle];
}

- (id)initWithMapView:(RMMapView *)aMapView coordinate:(CLLocationCoordinate2D)aCoordinate andTitle:(NSString *)aTitle
{
    if (!(self = [super init]))
        return nil;

    self.mapView      = aMapView;
    self.coordinate   = aCoordinate;
    self.title        = aTitle;
    self.subtitle     = nil;
    self.userInfo     = nil;
    self.quadTreeNode = nil;

    self.annotationType    = nil;
    self.annotationIcon    = nil;
    self.badgeIcon         = nil;
    self.anchorPoint       = CGPointZero;
    self.hasBoundingBox    = NO;
    self.enabled           = YES;
    self.clusteringEnabled = YES;

    self.isUserLocationAnnotation = NO;

    layer = nil;

    return self;
}

- (void)dealloc
{
    [[self.mapView quadTree] removeAnnotation:self];
}

- (void)setCoordinate:(CLLocationCoordinate2D)aCoordinate
{
    coordinate = aCoordinate;
    self.projectedLocation = [[mapView projection] coordinateToProjectedPoint:aCoordinate];
    self.position = [mapView projectedPointToPixel:self.projectedLocation];

    if (!self.hasBoundingBox)
        self.projectedBoundingBox = RMProjectedRectMake(self.projectedLocation.x, self.projectedLocation.y, 1.0, 1.0);

    [self.quadTreeNode performSelector:@selector(annotationDidChangeBoundingBox:) withObject:self];
}

- (void)setMapView:(RMMapView *)aMapView
{
    mapView = aMapView;

    if (!aMapView)
        self.layer = nil;
}

- (void)setPosition:(CGPoint)aPosition animated:(BOOL)animated
{
    position = aPosition;

    if (layer)
        [layer setPosition:aPosition animated:animated];
}

- (void)setPosition:(CGPoint)aPosition
{
    [self setPosition:aPosition animated:YES];
}

- (CGPoint)absolutePosition
{
    return [self.mapView.layer convertPoint:self.position fromLayer:self.layer.superlayer];
}

- (RMMapLayer *)layer
{
    return layer;
}

- (void)setLayer:(RMMapLayer *)aLayer
{
    CALayer *superLayer = [layer superlayer];

    if (layer != aLayer)
    {
        if (layer.superlayer)
            [layer removeFromSuperlayer];

         layer = nil;
    }

    if (aLayer)
    {
        layer = aLayer;
        layer.annotation = self;
        [superLayer addSublayer:layer];
        [layer setPosition:self.position animated:NO];
    }
}

- (BOOL)isAnnotationWithinBounds:(CGRect)bounds
{
    if (self.hasBoundingBox)
    {
        RMProjectedRect projectedScreenBounds = [mapView projectedBounds];
        return RMProjectedRectIntersectsProjectedRect(projectedScreenBounds, projectedBoundingBox);
    }
    else
    {
        return CGRectContainsPoint(bounds, self.position);
    }
}

- (BOOL)isAnnotationOnScreen
{
    return [self isAnnotationWithinBounds:[mapView bounds]];
}

- (BOOL)isAnnotationVisibleOnScreen
{
    return (layer != nil && [self isAnnotationOnScreen]);
}

- (void)setIsClusterAnnotation:(BOOL)isClusterAnnotation
{
    _isClusterAnnotation = isClusterAnnotation;
}

- (NSArray *)clusteredAnnotations
{
    return (self.isClusterAnnotation ? ((RMQuadTreeNode *)self.userInfo).clusteredAnnotations : nil);
}

- (void)setIsUserLocationAnnotation:(BOOL)flag
{
    isUserLocationAnnotation = flag;
}

#pragma mark -

- (void)setBoundingBoxCoordinatesSouthWest:(CLLocationCoordinate2D)southWest northEast:(CLLocationCoordinate2D)northEast
{
    RMProjectedPoint first = [[mapView projection] coordinateToProjectedPoint:southWest];
    RMProjectedPoint second = [[mapView projection] coordinateToProjectedPoint:northEast];
    self.projectedBoundingBox = RMProjectedRectMake(first.x, first.y, second.x - first.x, second.y - first.y);
    self.hasBoundingBox = YES;
}

- (void)setBoundingBoxFromLocations:(NSArray *)locations
{
    CLLocationCoordinate2D min, max;
	min.latitude = kRMMaxLatitude; min.longitude = kRMMaxLongitude;
	max.latitude = kRMMinLatitude; max.longitude = kRMMinLongitude;

    CLLocationDegrees currentLatitude, currentLongitude;

	for (CLLocation *currentLocation in locations)
    {
        currentLatitude = currentLocation.coordinate.latitude;
        currentLongitude = currentLocation.coordinate.longitude;

        // POIs outside of the world...
        if (currentLatitude < kRMMinLatitude || currentLatitude > kRMMaxLatitude || currentLongitude < kRMMinLongitude || currentLongitude > kRMMaxLongitude)
            continue;

		max.latitude  = fmax(currentLatitude, max.latitude);
		max.longitude = fmax(currentLongitude, max.longitude);
		min.latitude  = fmin(currentLatitude, min.latitude);
		min.longitude = fmin(currentLongitude, min.longitude);
	}

    [self setBoundingBoxCoordinatesSouthWest:min northEast:max];
}

#pragma mark -

- (NSString *)description
{
    if (self.hasBoundingBox)
        return [NSString stringWithFormat:@"<%@: %@ @ (%.0f,%.0f) {(%.0f,%.0f) - (%.0f,%.0f)}>", NSStringFromClass([self class]), (self.title ? self.title : self.annotationType), self.projectedLocation.x, self.projectedLocation.y, self.projectedBoundingBox.origin.x, self.projectedBoundingBox.origin.y, self.projectedBoundingBox.origin.x + self.projectedBoundingBox.size.width, self.projectedBoundingBox.origin.y + self.projectedBoundingBox.size.height];
    else
        return [NSString stringWithFormat:@"<%@: %@ @ (%.0f,%.0f)>", NSStringFromClass([self class]), (self.title ? self.title : self.annotationType), self.projectedLocation.x, self.projectedLocation.y];
}

@end