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/*
* cocos2d for iPhone: http://www.cocos2d-iphone.org
*
* Copyright (c) 2008-2010 Ricardo Quesada
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/

#import "ccConfig.h"
#import "CCTileMapAtlas.h"
#import "ccMacros.h"
#import "Support/CCFileUtils.h"

@interface CCTileMapAtlas (Private)
-(void) loadTGAfile:(NSString*)file;
-(void) calculateItemsToRender;
-(void) updateAtlasValueAt:(ccGridSize)pos withValue:(ccColor3B)value withIndex:(NSUInteger)idx;
@end


@implementation CCTileMapAtlas

@synthesize tgaInfo;

#pragma mark CCTileMapAtlas - Creation & Init
+(id) tileMapAtlasWithTileFile:(NSString*)tile mapFile:(NSString*)map tileWidth:(int)w tileHeight:(int)h
{
return [[[self alloc] initWithTileFile:tile mapFile:map tileWidth:w tileHeight:h] autorelease];
}


-(id) initWithTileFile:(NSString*)tile mapFile:(NSString*)map tileWidth:(int)w tileHeight:(int)h
{
[self loadTGAfile: map];
[self calculateItemsToRender];

if( (self=[super initWithTileFile:tile tileWidth:w tileHeight:h itemsToRender: itemsToRender]) ) {

posToAtlasIndex = [[NSMutableDictionary dictionaryWithCapacity:itemsToRender] retain];

[self updateAtlasValues];

[self setContentSize: CGSizeMake(tgaInfo->width*itemWidth_, tgaInfo->height*itemHeight_)];
}

return self;
}

-(void) dealloc
{
if( tgaInfo )
tgaDestroy(tgaInfo);

[posToAtlasIndex release];

[super dealloc];
}

-(void) releaseMap
{
if( tgaInfo )
tgaDestroy(tgaInfo);

tgaInfo = nil;

[posToAtlasIndex release];
posToAtlasIndex = nil;
}

-(void) calculateItemsToRender
{
NSAssert( tgaInfo != nil, @"tgaInfo must be non-nil");

itemsToRender = 0;
for(int x = 0;x < tgaInfo->width; x++ ) {
for(int y = 0; y < tgaInfo->height; y++ ) {
ccColor3B *ptr = (ccColor3B*) tgaInfo->imageData;
ccColor3B value = ptr[x + y * tgaInfo->width];
if( value.r )
itemsToRender++;
}
}
}

-(void) loadTGAfile:(NSString*)file
{
NSAssert( file != nil, @"file must be non-nil");

NSString *path = [CCFileUtils fullPathFromRelativePath:file ];

// //Find the path of the file
// NSBundle *mainBndl = [CCDirector sharedDirector].loadingBundle;
// NSString *resourcePath = [mainBndl resourcePath];
// NSString * path = [resourcePath stringByAppendingPathComponent:file];

tgaInfo = tgaLoad( [path UTF8String] );
#if 1
if( tgaInfo->status != TGA_OK )
[NSException raise:@"TileMapAtlasLoadTGA" format:@"TileMapAtas cannot load TGA file"];
#endif
}

#pragma mark CCTileMapAtlas - Atlas generation / updates

-(void) setTile:(ccColor3B) tile at:(ccGridSize) pos
{
NSAssert( tgaInfo != nil, @"tgaInfo must not be nil");
NSAssert( posToAtlasIndex != nil, @"posToAtlasIndex must not be nil");
NSAssert( pos.x < tgaInfo->width, @"Invalid position.x");
NSAssert( pos.y < tgaInfo->height, @"Invalid position.x");
NSAssert( tile.r != 0, @"R component must be non 0");

ccColor3B *ptr = (ccColor3B*) tgaInfo->imageData;
ccColor3B value = ptr[pos.x + pos.y * tgaInfo->width];
if( value.r == 0 )
CCLOG(@"cocos2d: Value.r must be non 0.");
else {
ptr[pos.x + pos.y * tgaInfo->width] = tile;

// XXX: this method consumes a lot of memory
// XXX: a tree of something like that shall be impolemented
NSNumber *num = [posToAtlasIndex objectForKey: [NSString stringWithFormat:@"%d,%d", pos.x, pos.y]];
[self updateAtlasValueAt:pos withValue:tile withIndex: [num integerValue]];
}
}

-(ccColor3B) tileAt:(ccGridSize) pos
{
NSAssert( tgaInfo != nil, @"tgaInfo must not be nil");
NSAssert( pos.x < tgaInfo->width, @"Invalid position.x");
NSAssert( pos.y < tgaInfo->height, @"Invalid position.y");

ccColor3B *ptr = (ccColor3B*) tgaInfo->imageData;
ccColor3B value = ptr[pos.x + pos.y * tgaInfo->width];

return value;
}

-(void) updateAtlasValueAt:(ccGridSize)pos withValue:(ccColor3B)value withIndex:(NSUInteger)idx
{
ccV3F_C4B_T2F_Quad quad;

NSInteger x = pos.x;
NSInteger y = pos.y;
float row = (value.r % itemsPerRow_);
float col = (value.r / itemsPerRow_);

float textureWide = [[textureAtlas_ texture] pixelsWide];
float textureHigh = [[textureAtlas_ texture] pixelsHigh];

#if CC_FIX_ARTIFACTS_BY_STRECHING_TEXEL
float left = (2*row*itemWidth_+1)/(2*textureWide);
float right = left+(itemWidth_*2-2)/(2*textureWide);
float top = (2*col*itemHeight_+1)/(2*textureHigh);
float bottom = top+(itemHeight_*2-2)/(2*textureHigh);
#else
float left = (row*itemWidth_)/textureWide;
float right = left+itemWidth_/textureWide;
float top = (col*itemHeight_)/textureHigh;
float bottom = top+itemHeight_/textureHigh;
#endif


quad.tl.texCoords.u = left;
quad.tl.texCoords.v = top;
quad.tr.texCoords.u = right;
quad.tr.texCoords.v = top;
quad.bl.texCoords.u = left;
quad.bl.texCoords.v = bottom;
quad.br.texCoords.u = right;
quad.br.texCoords.v = bottom;

quad.bl.vertices.x = (int) (x * itemWidth_);
quad.bl.vertices.y = (int) (y * itemHeight_);
quad.bl.vertices.z = 0.0f;
quad.br.vertices.x = (int)(x * itemWidth_ + itemWidth_);
quad.br.vertices.y = (int)(y * itemHeight_);
quad.br.vertices.z = 0.0f;
quad.tl.vertices.x = (int)(x * itemWidth_);
quad.tl.vertices.y = (int)(y * itemHeight_ + itemHeight_);
quad.tl.vertices.z = 0.0f;
quad.tr.vertices.x = (int)(x * itemWidth_ + itemWidth_);
quad.tr.vertices.y = (int)(y * itemHeight_ + itemHeight_);
quad.tr.vertices.z = 0.0f;

[textureAtlas_ updateQuad:&quad atIndex:idx];
}

-(void) updateAtlasValues
{
NSAssert( tgaInfo != nil, @"tgaInfo must be non-nil");


int total = 0;

for(int x = 0;x < tgaInfo->width; x++ ) {
for(int y = 0; y < tgaInfo->height; y++ ) {
if( total < itemsToRender ) {
ccColor3B *ptr = (ccColor3B*) tgaInfo->imageData;
ccColor3B value = ptr[x + y * tgaInfo->width];

if( value.r != 0 ) {
[self updateAtlasValueAt:ccg(x,y) withValue:value withIndex:total];

NSString *key = [NSString stringWithFormat:@"%d,%d", x,y];
NSNumber *num = [NSNumber numberWithInt:total];
[posToAtlasIndex setObject:num forKey:key];

total++;
}
}
}
}
}
@end
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