//
//  XMPPSRVResolver.h
// 
//  Originally created by Eric Chamberlain on 6/15/10.
//  Based on SRVResolver by Apple, Inc.
//  

#import <Foundation/Foundation.h>
#import <dns_sd.h>

extern NSString *const XMPPSRVResolverErrorDomain;


@interface XMPPSRVResolver : NSObject
{
	__unsafe_unretained id delegate;
	dispatch_queue_t delegateQueue;
	
	dispatch_queue_t resolverQueue;
	void *resolverQueueTag;
	
	__strong NSString *srvName;
	NSTimeInterval timeout;
	
    BOOL resolveInProgress;
	
    NSMutableArray *results;
    DNSServiceRef sdRef;
	
	int sdFd;
	dispatch_source_t sdReadSource;
	dispatch_source_t timeoutTimer;
}

/**
 * The delegate & delegateQueue are mandatory.
 * The resolverQueue is optional. If NULL, it will automatically create it's own internal queue.
**/
- (id)initWithdDelegate:(id)aDelegate delegateQueue:(dispatch_queue_t)dq resolverQueue:(dispatch_queue_t)rq;

@property (strong, readonly) NSString *srvName;
@property (readonly) NSTimeInterval timeout;

- (void)startWithSRVName:(NSString *)aSRVName timeout:(NSTimeInterval)aTimeout;
- (void)stop;

+ (NSString *)srvNameFromXMPPDomain:(NSString *)xmppDomain;

@end

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

@protocol XMPPSRVResolverDelegate

- (void)xmppSRVResolver:(XMPPSRVResolver *)sender didResolveRecords:(NSArray *)records;
- (void)xmppSRVResolver:(XMPPSRVResolver *)sender didNotResolveDueToError:(NSError *)error;

@end

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

@interface XMPPSRVRecord : NSObject
{
	UInt16 priority;
	UInt16 weight;
	UInt16 port;
	NSString *target;
	
	NSUInteger sum;
	NSUInteger srvResultsIndex;
}

+ (XMPPSRVRecord *)recordWithPriority:(UInt16)priority weight:(UInt16)weight port:(UInt16)port target:(NSString *)target;

- (id)initWithPriority:(UInt16)priority weight:(UInt16)weight port:(UInt16)port target:(NSString *)target;

@property (nonatomic, readonly) UInt16 priority;
@property (nonatomic, readonly) UInt16 weight;
@property (nonatomic, readonly) UInt16 port;
@property (nonatomic, readonly) NSString *target;

@end