/*!
  @header ECLogging
  @abstract Module of Encore
 
  @availability OS X, GNUstep
  @copyright 2004, 2005, 2006 Oliver Langer

  Author: Oliver Langer

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA

  <pre>
  -------------------------------------------------------------------------
  Modification history

  16.01.06 ola     initial version
  22.08.06 ola     license changed
  -------------------------------------------------------------------------
  </pre>
*/

#include <Encore/ECMemory.h>
#include <Encore/ECLogging.h>
#include <Encore/ECDefaultLoggingFormatter.h>
#include <Encore/ECNSLogLoggingWriter.h>
#include <Encore/ECStringUtils.h>
#include <Encore/ECLogger.h>
#include <Encore/ECLoggingConfiguration.h>


static ECLogging *globalLogging = nil;
static NSLock *_lock;


@implementation ECLogging

+ initialize {
  [super initialize];

  _lock = [[NSLock alloc] init];

  if( nil == globalLogging ) {
    globalLogging = [[ECLogging alloc] init];
  }

  return self;
}


+ (ECLogger *)  loggerForContext: (NSString *) aContext {
  return [[ECLogging instance] loggerForContext: aContext];
}


+ (ECLogging *) instance {
  [_lock lock];
  if( nil == globalLogging ) {
    globalLogging = [[ECLogging alloc] init];
  }
  [_lock unlock];
  
  return globalLogging;
  
}


- init {
  if( nil != globalLogging ) {
    return globalLogging;
  }
  
  self = [super init];
  self->contextToLogger = [[NSMutableDictionary alloc] init];
  self->rootLogger = nil;
  
  return self;
}


- (void) dealloc {
  [self->contextToLogger release];
  [self->rootLogger release];
  
  [_lock lock];
    globalLogging = nil;
  [_lock unlock];
  [super dealloc];
}


- addRootLoggingConfiguration: (ECLoggingConfiguration *) aConfiguration {
  return [self addLoggingConfiguration: aConfiguration forContext: nil];
}


- addLoggingConfiguration: (ECLoggingConfiguration *) aConfiguration
  forContext: (NSString *) aContext {
  NSArray *allContexts;
  ECLogger *logger;
  int i;

  if( nil == aContext ) {
    self->rootLogger = [[aConfiguration logger] retain];
    
    return self;
  }
  
  EC_AUTORELEASEPOOL_BEGIN
    logger = [aConfiguration logger];

    allContexts = [self createAllSupercontextsOf: aContext];
    for( i = 0; i < [allContexts count]; i++ ) {
      [self->contextToLogger 
        setObject: logger
        forKey: [allContexts objectAtIndex: i]];
    }

    [self->contextToLogger 
      setObject: logger
      forKey: aContext];
  EC_AUTORELEASEPOOL_END

  return self;
}


- (NSArray *) createAllSupercontextsOf: (NSString *) aContextStr {
  NSArray *toReturn = [[[NSMutableArray alloc] init] autorelease];
  NSArray *substrings;
  NSMutableString *context = nil;
  int i;

  substrings = [aContextStr splitStringUsingDelimiter: @"."];
    
  for( i = 0; i < (int) ([substrings count]-2); i++) {
    if( nil == context ) {
      context = [[[NSMutableString alloc] init] autorelease];
    } else {
      [context appendString: @"."];
    }

    [context appendString: [substrings objectAtIndex: i]];
  }

  return toReturn;
}


- (ECLogger *)  loggerForContext: (NSString *) aContext {
  ECLogger *logger = [self->contextToLogger objectForKey: aContext];
  
  return (nil == logger) ? rootLogger : logger;
}
@end