/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
 *   Jonathan Schleifer <js@webkeks.org>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#import "OFMutableSet_hashtable.h"
#import "OFCountedSet_hashtable.h"
#import "OFMapTable.h"
#import "OFString.h"
#import "OFArray.h"
#import "OFXMLElement.h"
#import "OFXMLAttribute.h"

#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFEnumerationMutationException.h"
#import "OFOutOfRangeException.h"

@implementation OFCountedSet_hashtable
+ (void)initialize
{
	if (self == [OFCountedSet_hashtable class])
		[self inheritMethodsFromClass: [OFMutableSet_hashtable class]];
}

- initWithSet: (OFSet*)set
{
	self = [self init];

	@try {
		void *pool = objc_autoreleasePoolPush();

		if ([set isKindOfClass: [OFCountedSet class]]) {
			OFCountedSet *countedSet = (OFCountedSet*)countedSet;
			OFEnumerator *enumerator =
			    [countedSet objectEnumerator];
			id object;

			while ((object = [enumerator nextObject]) != nil) {
				size_t i, count;

				count = [countedSet countForObject: object];

				for (i = 0; i < count; i++)
					[self addObject: object];
			}
		} else {
			OFEnumerator *enumerator = [set objectEnumerator];
			id object;

			while ((object = [enumerator nextObject]) != nil)
				[self addObject: object];
		}

		objc_autoreleasePoolPop(pool);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- initWithArray: (OFArray*)array
{
	self = [self init];

	@try {
		id const *objects = [array objects];
		size_t i, count = [array count];

		for (i = 0; i < count; i++)
			[self addObject: objects[i]];
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- initWithObjects: (id const*)objects
	    count: (size_t)count
{
	self = [self init];

	@try {
		size_t i;

		for (i = 0; i < count; i++)
			[self addObject: objects[i]];
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- initWithObject: (id)firstObject
       arguments: (va_list)arguments
{
	self = [self init];

	@try {
		id object;

		[self addObject: firstObject];

		while ((object = va_arg(arguments, id)) != nil)
			[self addObject: object];
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- initWithSerialization: (OFXMLElement*)element
{
	self = [self init];

	@try {
		void *pool = objc_autoreleasePoolPush();
		OFArray *objects;
		OFEnumerator *enumerator;
		OFXMLElement *objectElement;

		if (![[element name] isEqual: @"OFCountedSet"] ||
		    ![[element namespace] isEqual: OF_SERIALIZATION_NS])
			@throw [OFInvalidArgumentException exception];

		objects = [element elementsForName: @"object"
					 namespace: OF_SERIALIZATION_NS];

		enumerator = [objects objectEnumerator];
		while ((objectElement = [enumerator nextObject]) != nil) {
			void *pool2 = objc_autoreleasePoolPush();
			OFXMLElement *object;
			OFXMLAttribute *count_;
			size_t count;

			object = [[objectElement elementsForNamespace:
			    OF_SERIALIZATION_NS] firstObject];
			count_ = [objectElement attributeForName: @"count"];

			if (object == nil || count_ == nil)
				@throw [OFInvalidFormatException exception];

			count = (size_t)[[count_ stringValue] decimalValue];

			[_mapTable setValue: (void*)(uintptr_t)count
				     forKey: [object objectByDeserializing]];

			objc_autoreleasePoolPop(pool2);
		}

		objc_autoreleasePoolPop(pool);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (size_t)countForObject: (id)object
{
	return (size_t)(uintptr_t)[_mapTable valueForKey: object];
}

#ifdef OF_HAVE_BLOCKS
- (void)enumerateObjectsAndCountUsingBlock:
    (of_counted_set_enumeration_block_t)block
{
	@try {
		[_mapTable enumerateKeysAndValuesUsingBlock:
		    ^ (void *key, void *value, bool *stop) {
			block(key, (size_t)(uintptr_t)value, stop);
		}];
	} @catch (OFEnumerationMutationException *e) {
		@throw [OFEnumerationMutationException
		    exceptionWithObject: self];
	}
}
#endif

- (void)addObject: (id)object
{
	size_t count = (size_t)(uintptr_t)[_mapTable valueForKey: object];

	if (SIZE_MAX - count < 1 || UINTPTR_MAX - count < 1)
		@throw [OFOutOfRangeException exception];

	[_mapTable setValue: (void*)(uintptr_t)(count + 1)
		     forKey: object];
}

- (void)removeObject: (id)object
{
	size_t count = (size_t)(uintptr_t)[_mapTable valueForKey: object];

	if (count == 0)
		return;

	count--;

	if (count > 0)
		[_mapTable setValue: (void*)(uintptr_t)count
			     forKey: object];
	else
		[_mapTable removeValueForKey: object];
}

- (void)makeImmutable
{
}
@end
