//
//  RMCoreAnimationRenderer.m
//
// Copyright (c) 2008-2009, 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 "RMGlobalConstants.h"
#import "RMCoreAnimationRenderer.h"
#import <QuartzCore/QuartzCore.h>
#import "RMTile.h"
#import "RMTileLoader.h"
#import "RMPixel.h"
#import "RMTileImage.h"

@implementation RMCoreAnimationRenderer

- (id)initWithContent:(RMMapContents *)_contents
{
	if (!(self = [super initWithContent:_contents]))
		return nil;

	// NOTE: RMMapContents may still be initialising when this function
	//       is called. Be careful using any of methods - they might return
	//       strange data.

	layer = [[CAScrollLayer layer] retain];
	layer.anchorPoint = CGPointZero;
	layer.masksToBounds = YES;
	// If the frame is set incorrectly here, it will be fixed when setRenderer is called in RMMapContents
	layer.frame = [content screenBounds];

	NSMutableDictionary *customActions = [NSMutableDictionary dictionaryWithDictionary:[layer actions]];
	[customActions setObject:[NSNull null] forKey:@"sublayers"];
	layer.actions = customActions;
	layer.delegate = self;

	tiles = [[NSMutableArray alloc] init];

	return self;
}

- (void)dealloc
{
	[tiles release];
	[layer release];
	[super dealloc];
}

/// \bug this is a no-op
- (void)mapImageLoaded:(NSNotification *)notification
{
}

- (id <CAAction>)actionForLayer:(CALayer *)theLayer forKey:(NSString *)key
{
	if (theLayer == layer)
	{
//		RMLog(@"base layer key: %@", key);
		return nil;
	}

	if ([key isEqualToString:@"position"] || [key isEqualToString:@"bounds"])
		return nil;
	else {
//		RMLog(@"key: %@", key);
		return nil;
	}
}

- (void)tileImageAdded:(RMTileImage *)image
{
//	RMLog(@"tileAdded: %d %d %d at %f %f %f %f", tile.x, tile.y, tile.zoom, image.screenLocation.origin.x, image.screenLocation.origin.y,
//		  image.screenLocation.size.width, image.screenLocation.size.height);
	
//	RMLog(@"tileAdded");

    RMTile tile = image.tile;
	NSUInteger min = 0, max = [tiles count];
	CALayer *sublayer = [image layer];
	sublayer.delegate = self;

	while (min < max) {
		// Binary search for insertion point
		NSUInteger pivot = (min + max) / 2;
		RMTileImage *other = [tiles objectAtIndex:pivot];
		RMTile otherTile = other.tile;

		if (otherTile.zoom <= tile.zoom) {
			min = pivot + 1;
		}
		if (otherTile.zoom > tile.zoom) {
			max = pivot;
		}
	}

	[tiles insertObject:image atIndex:min];
	[layer insertSublayer:sublayer atIndex:min];
}

- (void)tileImageRemoved:(RMTileImage *)tileImage
{
	RMTileImage *image = nil;
    RMTile tile = tileImage.tile;
    
	NSUInteger i = [tiles count];
	while (i--)
	{
		RMTileImage *potential = [tiles objectAtIndex:i];

		if (RMTilesEqual(tile, potential.tile))
		{
			image = [[potential retain] autorelease];
			[tiles removeObjectAtIndex:i];
			break;
		}
	}

//	RMLog(@"tileRemoved: %d %d %d at %f %f %f %f", tile.x, tile.y, tile.zoom, image.screenLocation.origin.x, image.screenLocation.origin.y,
//		  image.screenLocation.size.width, image.screenLocation.size.height);

	[[image layer] removeFromSuperlayer];
}

- (void)setFrame:(CGRect)frame
{
	layer.frame = [content screenBounds];
}

- (CALayer *)layer
{
	return layer;
}

@end