/*
 RDP Session object 
 
 Copyright 2013 Thinstuff Technologies GmbH, Authors: Martin Fleisz, Dorian Johnson
 
 This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. 
 If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#import "ios_freerdp.h"
#import "ios_freerdp_ui.h"
#import "ios_freerdp_events.h"

#import "RDPSession.h"
#import "TSXTypes.h"
#import "Bookmark.h"
#import "ConnectionParams.h"

NSString* TSXSessionDidDisconnectNotification = @"TSXSessionDidDisconnect";
NSString* TSXSessionDidFailToConnectNotification = @"TSXSessionDidFailToConnect";

@interface RDPSession (Private)
- (void)runSession;
- (void)runSessionFinished:(NSNumber*)result;
- (mfInfo*)mfi;

// The connection thread calls these on the main thread.
- (void)sessionWillConnect;
- (void)sessionDidConnect;
- (void)sessionDidDisconnect;
- (void)sessionDidFailToConnect:(int)reason;
- (void)sessionBitmapContextWillChange;
- (void)sessionBitmapContextDidChange;
@end

@implementation RDPSession

@synthesize delegate=_delegate, params=_params, toolbarVisible = _toolbar_visible, uiRequestCompleted = _ui_request_completed, bookmark = _bookmark;

+ (void)initialize
{
    ios_init_freerdp();
}

// Designated initializer.
- (id)initWithBookmark:(ComputerBookmark *)bookmark
{
	if (!(self = [super init]))
		return nil;
	
	if (!bookmark)
		[NSException raise:NSInvalidArgumentException format:@"%s: params may not be nil.", __func__];
	
    _bookmark = [bookmark retain];
	_params = [[bookmark params] copy];
    _name = [[bookmark label] retain];
    _delegate = nil;	
    _toolbar_visible = YES;
	_freerdp = ios_freerdp_new();
    rdpSettings* settings = _freerdp->settings;	
    _ui_request_completed = [[NSCondition alloc] init];
    
    BOOL connected_via_3g = ![bookmark conntectedViaWLAN];
    
	// Screen Size is set on connect (we need a valid delegate in case the user choose an automatic screen size)
    
	// Other simple numeric settings
	if ([_params hasValueForKey:@"colors"])
		settings->ColorDepth = [_params intForKey:@"colors" with3GEnabled:connected_via_3g];
	
	if ([_params hasValueForKey:@"port"])
		settings->ServerPort = [_params intForKey:@"port"];
	
	if ([_params boolForKey:@"console"])
		settings->ConsoleSession = 1;

	// connection info	
    settings->ServerHostname = strdup([_params UTF8StringForKey:@"hostname"]);
	
	// String settings
	if ([[_params StringForKey:@"username"] length])
		settings->Username = strdup([_params UTF8StringForKey:@"username"]);
    
	if ([[_params StringForKey:@"password"] length])
		settings->Password = strdup([_params UTF8StringForKey:@"password"]);
	
	if ([[_params StringForKey:@"domain"] length])
		settings->Domain = strdup([_params UTF8StringForKey:@"domain"]);
    
	settings->ShellWorkingDirectory = strdup([_params UTF8StringForKey:@"working_directory"]);
	settings->AlternateShell = strdup([_params UTF8StringForKey:@"remote_program"]);
	
	
	// RemoteFX
	if ([_params boolForKey:@"perf_remotefx" with3GEnabled:connected_via_3g])
	{
		settings->RemoteFxCodec = TRUE;
		settings->FastPathOutput = TRUE;
		settings->ColorDepth = 32;
		settings->LargePointerFlag = TRUE;
        settings->FrameMarkerCommandEnabled = TRUE;
        settings->FrameAcknowledge = 10;
	}
    
    // enable NSCodec
    settings->NSCodec = TRUE;
	settings->BitmapCacheV3Enabled = TRUE;

	// Performance flags
    settings->DisableWallpaper = ![_params boolForKey:@"perf_show_desktop" with3GEnabled:connected_via_3g];
    settings->DisableFullWindowDrag = ![_params boolForKey:@"perf_window_dragging" with3GEnabled:connected_via_3g];
    settings->DisableMenuAnims = ![_params boolForKey:@"perf_menu_animation" with3GEnabled:connected_via_3g];
    settings->DisableThemes = ![_params boolForKey:@"perf_windows_themes" with3GEnabled:connected_via_3g];
    settings->AllowFontSmoothing = [_params boolForKey:@"perf_font_smoothing" with3GEnabled:connected_via_3g];
    settings->AllowDesktopComposition = [_params boolForKey:@"perf_desktop_composition" with3GEnabled:connected_via_3g];
    
	settings->PerformanceFlags = PERF_FLAG_NONE;
	if (settings->DisableWallpaper)
        settings->PerformanceFlags |= PERF_DISABLE_WALLPAPER;        
	if (settings->DisableFullWindowDrag)
        settings->PerformanceFlags |= PERF_DISABLE_FULLWINDOWDRAG;
	if (settings->DisableMenuAnims)
		settings->PerformanceFlags |= PERF_DISABLE_MENUANIMATIONS;
	if (settings->DisableThemes)
        settings->PerformanceFlags |= PERF_DISABLE_THEMING;
	if (settings->AllowFontSmoothing)
		settings->PerformanceFlags |= PERF_ENABLE_FONT_SMOOTHING;
    if (settings->AllowDesktopComposition)
        settings->PerformanceFlags |= PERF_ENABLE_DESKTOP_COMPOSITION;
		
	if ([_params hasValueForKey:@"width"])
		settings->DesktopWidth = [_params intForKey:@"width"];
	if ([_params hasValueForKey:@"height"])
		settings->DesktopHeight = [_params intForKey:@"height"];
	
    // security
    switch ([_params intForKey:@"security"]) 
    {
        case TSXProtocolSecurityNLA:
            settings->RdpSecurity = FALSE;
            settings->TlsSecurity = FALSE;
            settings->NlaSecurity = TRUE;
            settings->ExtSecurity = FALSE;
            break;

        case TSXProtocolSecurityTLS:
            settings->RdpSecurity = FALSE;
            settings->TlsSecurity = TRUE;
            settings->NlaSecurity = FALSE;
            settings->ExtSecurity = FALSE;
            break;
            
        case TSXProtocolSecurityRDP:
            settings->RdpSecurity = TRUE;
            settings->TlsSecurity = FALSE;
            settings->NlaSecurity = FALSE;
            settings->ExtSecurity = FALSE;
            settings->DisableEncryption = TRUE;
            settings->EncryptionMethods = ENCRYPTION_METHOD_40BIT | ENCRYPTION_METHOD_128BIT | ENCRYPTION_METHOD_FIPS;
            settings->EncryptionLevel = ENCRYPTION_LEVEL_CLIENT_COMPATIBLE;
            break;

        default:
            break;
    }
    
	// Remote keyboard layout
	settings->KeyboardLayout = 0x409;
    
	// Audio settings
    settings->AudioPlayback = FALSE;
    settings->AudioCapture = FALSE;
	
	[self mfi]->session = self;
	return self;
}

- (void)dealloc
{
	[self setDelegate:nil];
    [_bookmark release];
    [_name release];
	[_params release];
    [_ui_request_completed release];
    
	ios_freerdp_free(_freerdp);
	
	[super dealloc];
}

- (CGContextRef)bitmapContext
{
    return [self mfi]->bitmap_context;
}

#pragma mark -
#pragma mark Connecting and disconnecting

- (void)connect
{    
	// Set Screen Size to automatic if widht or height are still 0
    rdpSettings* settings = _freerdp->settings;	
	if (settings->DesktopWidth == 0 || settings->DesktopHeight == 0)
	{
        CGSize size = CGSizeZero;        
        if ([[self delegate] respondsToSelector:@selector(sizeForFitScreenForSession:)])
            size = [[self delegate] sizeForFitScreenForSession:self];
        
        if (!CGSizeEqualToSize(CGSizeZero, size))
        {
            [_params setInt:size.width forKey:@"width"];
            [_params setInt:size.height forKey:@"height"];
            settings->DesktopWidth = size.width;
            settings->DesktopHeight = size.height;
        }
	}
    
    // TODO: This is a hack to ensure connections to RDVH with 16bpp don't have an odd screen resolution width
    //       Otherwise this could result in screen corruption ..
    if (settings->ColorDepth <= 16)
        settings->DesktopWidth &= (~1);
    
	[self performSelectorInBackground:@selector(runSession) withObject:nil];
}

- (void)disconnect
{
	mfInfo* mfi = [self mfi];
	
    ios_events_send(mfi, [NSDictionary dictionaryWithObject:@"disconnect" forKey:@"type"]);

	if (mfi->connection_state == TSXConnectionConnecting)
	{
		mfi->unwanted = YES;
		[self sessionDidDisconnect];
		return;
	}	
}

- (TSXConnectionState)connectionState
{
	return [self mfi]->connection_state;
}

// suspends the session
-(void)suspend
{
    if(!_suspended)
    {
        _suspended = YES;
//        instance->update->SuppressOutput(instance->context, 0, NULL);
    }
}

// resumes a previously suspended session
-(void)resume
{
    if(_suspended)
    {
/*        RECTANGLE_16 rec;
        rec.left = 0;
        rec.top = 0;
        rec.right = instance->settings->width;
        rec.bottom = instance->settings->height;
*/        
        _suspended = NO;
//        instance->update->SuppressOutput(instance->context, 1, &rec);
//        [delegate sessionScreenSettingsChanged:self];        
    }
}

// returns YES if the session is started
-(BOOL)isSuspended
{
    return _suspended;
}

#pragma mark -
#pragma mark Input events

- (void)sendInputEvent:(NSDictionary*)eventDescriptor
{
	if ([self mfi]->connection_state == TSXConnectionConnected)
		ios_events_send([self mfi], eventDescriptor);
}

#pragma mark -
#pragma mark Server events (main thread)

- (void)setNeedsDisplayInRectAsValue:(NSValue*)rect_value
{
	if ([[self delegate] respondsToSelector:@selector(session:needsRedrawInRect:)])
		[[self delegate] session:self needsRedrawInRect:[rect_value CGRectValue]];
} 


#pragma mark -
#pragma mark interface functions

- (UIImage*)getScreenshotWithSize:(CGSize)size
{
    NSAssert([self mfi]->bitmap_context != nil, @"Screenshot requested while having no valid RDP drawing context");
    
	CGImageRef cgImage = CGBitmapContextCreateImage([self mfi]->bitmap_context);
	UIGraphicsBeginImageContext(size);
	
    CGContextTranslateCTM(UIGraphicsGetCurrentContext(), 0, size.height);
	CGContextScaleCTM(UIGraphicsGetCurrentContext(), 1.0, -1.0);
	CGContextDrawImage(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, size.width, size.height), cgImage);
	
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

	UIGraphicsEndImageContext();
	CGImageRelease(cgImage);	
	
	return viewImage;    
}

- (rdpSettings*)getSessionParams
{
    return _freerdp->settings;
}

- (NSString*)sessionName
{
    return _name;
}

@end 

#pragma mark -
@implementation RDPSession (Private)

- (mfInfo*)mfi
{
	return MFI_FROM_INSTANCE(_freerdp);
}

// Blocks until rdp session finishes.
- (void)runSession
{
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];	

    // Run the session
    [self performSelectorOnMainThread:@selector(sessionWillConnect) withObject:nil waitUntilDone:YES];
    int result_code = ios_run_freerdp(_freerdp);
    [self mfi]->connection_state = TSXConnectionDisconnected;
    [self performSelectorOnMainThread:@selector(runSessionFinished:) withObject:[NSNumber numberWithInt:result_code] waitUntilDone:YES];

    [pool release];
}

// Main thread.
- (void)runSessionFinished:(NSNumber*)result
{
	int result_code = [result intValue];
	
	switch (result_code)
	{
		case MF_EXIT_CONN_CANCELED:
			[self sessionDidDisconnect];
			break;
		case MF_EXIT_LOGON_TIMEOUT:
		case MF_EXIT_CONN_FAILED:
			[self sessionDidFailToConnect:result_code];
			break;
		case MF_EXIT_SUCCESS:
		default:
			[self sessionDidDisconnect];	
            break;
	}			 
}

#pragma mark -
#pragma mark Session management (main thread)

- (void)sessionWillConnect
{	
	if ([[self delegate] respondsToSelector:@selector(sessionWillConnect:)])
		[[self delegate] sessionWillConnect:self];
}

- (void)sessionDidConnect
{
	if ([[self delegate] respondsToSelector:@selector(sessionDidConnect:)])	
		[[self delegate] sessionDidConnect:self];	
}

- (void)sessionDidFailToConnect:(int)reason
{	
    [[NSNotificationCenter defaultCenter] postNotificationName:TSXSessionDidFailToConnectNotification object:self];

	if ([[self delegate] respondsToSelector:@selector(session:didFailToConnect:)])
		[[self delegate] session:self didFailToConnect:reason];
}

- (void)sessionDidDisconnect
{	
    [[NSNotificationCenter defaultCenter] postNotificationName:TSXSessionDidDisconnectNotification object:self];
	
    if ([[self delegate] respondsToSelector:@selector(sessionDidDisconnect:)])	
		[[self delegate] sessionDidDisconnect:self];
}

- (void)sessionBitmapContextWillChange
{
	if ([[self delegate] respondsToSelector:@selector(sessionBitmapContextWillChange:)])	
		[[self delegate] sessionBitmapContextWillChange:self];
}

- (void)sessionBitmapContextDidChange
{
	if ([[self delegate] respondsToSelector:@selector(sessionBitmapContextDidChange:)])
		[[self delegate] sessionBitmapContextDidChange:self];
}

- (void)showGoProScreen
{
	if ([[self delegate] respondsToSelector:@selector(showGoProScreen:)])
		[[self delegate] showGoProScreen:self];    
}

- (void)sessionRequestsAuthenticationWithParams:(NSMutableDictionary*)params
{
	if ([[self delegate] respondsToSelector:@selector(session:requestsAuthenticationWithParams:)])
		[[self delegate] session:self requestsAuthenticationWithParams:params];    
}

- (void)sessionVerifyCertificateWithParams:(NSMutableDictionary*)params
{
	if ([[self delegate] respondsToSelector:@selector(session:verifyCertificateWithParams:)])
		[[self delegate] session:self verifyCertificateWithParams:params];    
}

@end