/* FILE: WindowController.m
 *
 * Project              TChat
 * Class                WindowController
 * Creator              Chris B. Vetter
 * Maintainer           Chris B. Vetter
 * Creation Date        Mon Sep 11 15:17:32 CEST 2006
 *
 * Copyright (c) 2006
 *
 * TChat is free software under the terms of a dual BSD/LGPL license.
 * For a full copyright description, see the COPYRIGHT file.
 *
 ***************************************************************************/

//
// Include
//

#include "main.h"
#include "WindowController.h"

#include <AppKit/NSNibLoading.h>
#include <AppKit/NSScrollView.h>
#include <AppKit/NSTextStorage.h>
#include <AppKit/NSTextView.h>
#include <AppKit/NSWindowController.h>
#include <AppKit/NSWindow.h>

#include <Foundation/NSException.h>
#include <Foundation/NSFileHandle.h>
#include <Foundation/NSNotification.h>

//
// Define
//

#define Localize(key)   NSLocalizedString(key, @"")
#define NC		[NSNotificationCenter defaultCenter]

//
// Typedef
//

//
// Public
//

//
// Private
//

//
// Private Interface
//

@interface WindowController (Private)

@end

//
// Prototype
//

/***************************************************************************
**
** Implementation
**
*/

@implementation WindowController 

static WindowController	// fake 'shared' controller for -awakeFromNib...
  *wc = nil;		// thanks GNUstep :-P

/***************************************************************************
**
** Factory Methods
**
*/

/***************************************************************************
**
** Instance Methods
**
*/

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (id) initWithConnection: (NSFileHandle *) aFileHandle
                   myName: (NSString *) me
{
  if( (self = [super init]) )
  {
    //
    // Stupid GNUstep calls -init during -awakeFromNib :-P
    //
    wc = self;
    
    [NC addObserver: self
           selector: @selector(receiveMessage:)
               name: NSFileHandleReadCompletionNotification
             object: fileHandle];
    
    fileHandle = [aFileHandle retain];
    myName = [me copy];
    
    [fileHandle readInBackgroundAndNotify];
    
    [NSBundle loadNibNamed: @"WindowController.gorm"
                     owner: self];
    
    return self;
  }
  
  //
  // That's it
  //
  
  return nil;
}

/***************************************************************************
**
** Accessor Methods
**
*/

/***************************************************************************
**
** Protocol Methods
**
*/

/***************************************************************************
**
** Override Methods
**
*/

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (id) init
{
  if( ! wc )
  {
    [NSException raise: NSInternalInconsistencyException
                format: Localize(@"Use -initWithConnection:myName:")];
    
    exit(EXIT_FAILURE);
  }
  
  //
  // That's it
  //
  
  return wc;
}

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (void) dealloc
{
  {
    [[NSNotificationCenter defaultCenter] removeObserver: self];
    
    [fileHandle closeFile];
    [fileHandle release];
    
    [myName release];
  }
  [super dealloc];

  //
  // That's it
  //

  return;
}

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (void) awakeFromNib
{
  [inputField setEditable: YES];
  [inputField setStringValue: @""];
  [inputField setDelegate: self];
  [inputField setTarget: self];
  [inputField setAction: @selector(sendMessage:)];
  
  [[textView enclosingScrollView] setScrollsDynamically: YES];
  
  [window setInitialFirstResponder: inputField];
  [window setTitle: Localize(@"Chat Window")];
  [window setDelegate: self];
  [window center];
  
  //
  // That's it
  //
  
  return;
}

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (NSWindow *) window
{
  //
  // That's it
  //
  
  return window;
}

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (void) showWindow: (id) sender
{
  [inputField setStringValue: @""];
  
  [window orderFrontRegardless];
  [window display];
  
  //
  // That's it
  //
  
  return;
}

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (void) windowWillClose: (NSNotification *) notification
{
  [self release];
  
  //
  // That's it
  //
  
  return;
}

/***************************************************************************
**
** Private Methods
**
*/

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (void) postMessage: (NSString *) message
                from: (NSString *) person
{
  NSString
    *s = nil;
  NSAttributedString
    *as = nil;
  
  s = [NSString stringWithFormat: @"%@: %@\n", person, message];
  as = [[NSAttributedString alloc] initWithString: s];
  
  //
  // Display the message...
  //
  [[textView textStorage] appendAttributedString: as];
  [as release];
  
  //
  // ...and scroll if necessary
  //
  [textView scrollPoint: NSMakePoint(0., [[textView string] length])];
  
  //
  // FIXME: make 'inputField' the responder again, so we don't have to click
  //        it after a message has been sent and displayed
  
  //
  // That's it
  //
  
  return;
}

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (void) sendMessage: (id) sender
{
  NSString
    *message = nil;
  NSData
    *data = nil;
  
  //
  // Create the message and send it
  //
  message = [NSString stringWithFormat: @"_trystchat_:%@:%@",
              myName, [sender stringValue]];
  
  data = [NSData dataWithBytes: [message UTF8String]
                        length: [message length]];
  
  [fileHandle writeData: data];
  
  //
  // Display it in our own window...
  //
  [self postMessage: [sender stringValue]
               from: @"Me"];
  
  //
  // ...and clear out 'inputField'
  //
  [sender setStringValue: @""];

  //
  // That's it
  //
  
  return;
}

/**
 * <em>Description forthcoming</em>
 *
 *
 */

- (void) receiveMessage: (NSNotification *) notification
{
  NSData
    *data = nil;
  NSString
    *message = nil;
  NSArray
    *components = nil;
  
  data = [[notification userInfo] objectForKey: NSFileHandleNotificationDataItem];
  
  //
  // Too short?
  //
  if( [data length] == 0 )
  {
    [fileHandle readInBackgroundAndNotify];
    return;
  }
  
  //
  // Nope, retrieve the message
  //
  message = [[NSString alloc] initWithData: data
                                  encoding: NSUTF8StringEncoding];
  //
  // FIXME: if the actual message part contains a colon, we're screwed...
  //
  components = [message componentsSeparatedByString: @":"];
  
  if( [components count] != 3 )
  {
    [fileHandle readInBackgroundAndNotify];
    return;
  }
  
  //
  // Whatever it is, looks like it wasn't meant for us...
  //
  if( ! [[components objectAtIndex: 0] isEqualToString: @"_trystchat_"] )
  {
    [fileHandle readInBackgroundAndNotify];
    return;
  }
  
  //
  // Pop open the window
  //
  if( ! [[self window] isVisible] )
    [self showWindow: nil];
  
  //
  // ...and display the message
  //
  [self postMessage: [components objectAtIndex: 2] // FIXME: see above
               from: [components objectAtIndex: 1]];
  
  //
  // Now check if there's more
  //
  [fileHandle readInBackgroundAndNotify];
  
  //
  // That's it
  //
  
  return;
}

@end

/***************************************************************************
**
** Functions
**
*/

/*
** End of File.
**
****************************************************************************/