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//
// NSTimer-NoodleExtensions.m
// NoodleKit
//
// Created by Paul Kim on 6/29/10.
// Copyright 2010 Noodlesoft, LLC. All rights reserved.
//
// 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 "NSTimer-NoodleExtensions.h"
#import <objc/runtime.h>
#import "NoodleGlue.h"

#if defined(NS_BLOCKS_AVAILABLE) && (NS_BLOCKS_AVAILABLE == 1)

static char originalDateKey;
static char observerKey;

@implementation NSTimer (NoodleExtensions)

+ (NSTimer *)scheduledTimerWithAbsoluteFireDate:(NSDate *)fireDate target:(id)target selector:(SEL)aSelector userInfo:(id)userInfo
{
__block NSTimer *timer;

timer = [[[NSTimer alloc] initWithAbsoluteFireDate:fireDate target:target selector:aSelector userInfo:userInfo] autorelease];

if (timer != nil)
{
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
}
return timer;
}

+ (NSTimer *)scheduledTimerWithAbsoluteFireDate:(NSDate *)fireDate block:(NoodleTimerBlock)block
{
NoodleGlue *glue;

glue = [NoodleGlue glueWithBlock:
^(NoodleGlue *blockGlue, id object)
{
block(object);
}];

return [self scheduledTimerWithAbsoluteFireDate:fireDate target:glue selector:@selector(invoke:) userInfo:nil];
}


+ (NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)seconds repeats:(BOOL)repeats block:(NoodleTimerBlock)block
{
NoodleGlue *glue;

glue = [NoodleGlue glueWithBlock:
^(NoodleGlue *blockGlue, id object)
{
block(object);
}];

return [self scheduledTimerWithTimeInterval:seconds target:glue selector:@selector(invoke:) userInfo:nil repeats:repeats];
}

+ (NSTimer *)timerWithTimeInterval:(NSTimeInterval)seconds repeats:(BOOL)repeats block:(NoodleTimerBlock)block
{
NoodleGlue *glue;

glue = [NoodleGlue glueWithBlock:
^(NoodleGlue *blockGlue, id object)
{
block(object);
}];

return [self timerWithTimeInterval:seconds target:glue selector:@selector(invoke:) userInfo:nil repeats:repeats];
}

- (id)initWithAbsoluteFireDate:(NSDate *)date target:(id)target selector:(SEL)aSelector userInfo:(id)userInfo
{
self = [self initWithFireDate:date interval:0 target:target selector:aSelector userInfo:userInfo repeats:NO];

if (self != nil)
{
__block NSTimer *blockSelf;
id observer;

blockSelf = self;
objc_setAssociatedObject(self, &originalDateKey, date, OBJC_ASSOCIATION_RETAIN);

// We create a special observer object instead of using self. Since we are doing a category here, we can't
// override -invalidate or -dealloc and do proper unregistering from notifications. Instead, we create an
// intermediary observer that handles the notifications and unregisters itself when it is dealloced. We set
// this observer as an associated object which is the only place where it is retained.
// Note that the timer variable used is declared __block so that it is not retained by the block which would
// result in a retain cycle.
observer = [NoodleGlue glueWithBlock:
^(NoodleGlue *glue, id object) {
[blockSelf setFireDate:(NSDate *)objc_getAssociatedObject(blockSelf, &originalDateKey)];
}
cleanupBlock:
^(NoodleGlue *glue) {
[[NSNotificationCenter defaultCenter] removeObserver:glue];
[[[NSWorkspace sharedWorkspace] notificationCenter] removeObserver:glue];
}];

objc_setAssociatedObject(self, &observerKey, observer, OBJC_ASSOCIATION_RETAIN);

[[NSNotificationCenter defaultCenter] addObserver:observer selector:@selector(invoke:) name:NSSystemTimeZoneDidChangeNotification object:nil];
[[[NSWorkspace sharedWorkspace] notificationCenter] addObserver:observer selector:@selector(invoke:) name:NSWorkspaceDidWakeNotification object:nil];
}
return self;
}

- (id)initWithAbsoluteFireDate:(NSDate *)date block:(NoodleTimerBlock)block
{
    NoodleGlue *glue;
    
    glue = [NoodleGlue glueWithBlock:
            ^(NoodleGlue *blockGlue, id object)
            {
                block(object);
            }];
return [self initWithAbsoluteFireDate:date target:glue selector:@selector(invoke:) userInfo:nil];
}

- (id)initWithFireDate:(NSDate *)date interval:(NSTimeInterval)seconds repeats:(BOOL)repeats block:(NoodleTimerBlock)block
{
    NoodleGlue *glue;
    
    glue = [NoodleGlue glueWithBlock:
            ^(NoodleGlue *blockGlue, id object)
            {
                block(object);
            }];
return [self initWithFireDate:date interval:seconds target:glue selector:@selector(invoke:) userInfo:nil repeats:repeats];
}


@end

#endif
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