/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD 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 General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file cocoa_v.mm Code related to the cocoa video driver(s). */

/******************************************************************************
 *                             Cocoa video driver                             *
 * Known things left to do:                                                   *
 *  Nothing at the moment.                                                    *
 ******************************************************************************/

#ifdef WITH_COCOA

#include "../../stdafx.h"
#include "../../os/macosx/macos.h"

#define Rect  OTTDRect
#define Point OTTDPoint
#import <Cocoa/Cocoa.h>
#undef Rect
#undef Point

#include "../../openttd.h"
#include "../../debug.h"
#include "../../core/geometry_type.hpp"
#include "cocoa_v.h"
#include "../../blitter/factory.hpp"
#include "../../fileio_func.h"
#include "../../gfx_func.h"

#import <sys/param.h> /* for MAXPATHLEN */

/**
 * Important notice regarding all modifications!!!!!!!
 * There are certain limitations because the file is objective C++.
 * gdb has limitations.
 * C++ and objective C code can't be joined in all cases (classes stuff).
 * Read http://developer.apple.com/releasenotes/Cocoa/Objective-C++.html for more information.
 */


@interface OTTDMain : NSObject
@end


static NSAutoreleasePool *_ottd_autorelease_pool;
static OTTDMain *_ottd_main;
static bool _cocoa_video_started = false;
static bool _cocoa_video_dialog = false;

CocoaSubdriver *_cocoa_subdriver = NULL;



/**
 * The main class of the application, the application's delegate.
 */
@implementation OTTDMain
/**
 * Called when the internal event loop has just started running.
 */
- (void) applicationDidFinishLaunching: (NSNotification*) note
{
	/* Hand off to main application code */
	QZ_GameLoop();

	/* We're done, thank you for playing */
	[ NSApp stop:_ottd_main ];
}

/**
 * Display the in game quit confirmation dialog.
 */
- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication*) sender
{

	HandleExitGameRequest();

	return NSTerminateCancel; // NSTerminateLater ?
}
@end

/**
 * Initialize the application menu shown in top bar.
 */
static void setApplicationMenu()
{
	NSString *appName = @"OTTD";
	NSMenu *appleMenu = [ [ NSMenu alloc ] initWithTitle:appName ];

	/* Add menu items */
	NSString *title = [ @"About " stringByAppendingString:appName ];
	[ appleMenu addItemWithTitle:title action:@selector(orderFrontStandardAboutPanel:) keyEquivalent:@"" ];

	[ appleMenu addItem:[ NSMenuItem separatorItem ] ];

	title = [ @"Hide " stringByAppendingString:appName ];
	[ appleMenu addItemWithTitle:title action:@selector(hide:) keyEquivalent:@"h" ];

	NSMenuItem *menuItem = [ appleMenu addItemWithTitle:@"Hide Others" action:@selector(hideOtherApplications:) keyEquivalent:@"h" ];
	[ menuItem setKeyEquivalentModifierMask:(NSAlternateKeyMask | NSCommandKeyMask) ];

	[ appleMenu addItemWithTitle:@"Show All" action:@selector(unhideAllApplications:) keyEquivalent:@"" ];

	[ appleMenu addItem:[ NSMenuItem separatorItem ] ];

	title = [ @"Quit " stringByAppendingString:appName ];
	[ appleMenu addItemWithTitle:title action:@selector(terminate:) keyEquivalent:@"q" ];

	/* Put menu into the menubar */
	menuItem = [ [ NSMenuItem alloc ] initWithTitle:@"" action:nil keyEquivalent:@"" ];
	[ menuItem setSubmenu:appleMenu ];
	[ [ NSApp mainMenu ] addItem:menuItem ];

	/* Tell the application object that this is now the application menu.
	 * This interesting Objective-C construct is used because not all SDK
	 * versions define this method publicly. */
	[ NSApp performSelector:@selector(setAppleMenu:) withObject:appleMenu ];

	/* Finally give up our references to the objects */
	[ appleMenu release ];
	[ menuItem release ];
}

/**
 * Create a window menu.
 */
static void setupWindowMenu()
{
	NSMenu *windowMenu = [ [ NSMenu alloc ] initWithTitle:@"Window" ];

	/* "Minimize" item */
	[ windowMenu addItemWithTitle:@"Minimize" action:@selector(performMiniaturize:) keyEquivalent:@"m" ];

	/* Put menu into the menubar */
	NSMenuItem *menuItem = [ [ NSMenuItem alloc ] initWithTitle:@"Window" action:nil keyEquivalent:@"" ];
	[ menuItem setSubmenu:windowMenu ];
	[ [ NSApp mainMenu ] addItem:menuItem ];

	/* Tell the application object that this is now the window menu */
	[ NSApp setWindowsMenu:windowMenu ];

	/* Finally give up our references to the objects */
	[ windowMenu release ];
	[ menuItem release ];
}

/**
 * Startup the application.
 */
static void setupApplication()
{
	ProcessSerialNumber psn = { 0, kCurrentProcess };

	/* Ensure the application object is initialised */
	[ NSApplication sharedApplication ];

#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_3
	/* Tell the dock about us */
	if (MacOSVersionIsAtLeast(10, 3, 0)) {
		OSStatus returnCode = TransformProcessType(&psn, kProcessTransformToForegroundApplication);
		if (returnCode != 0) DEBUG(driver, 0, "Could not change to foreground application. Error %d", (int)returnCode);
	}
#endif

	/* Become the front process, important when start from the command line. */
	OSErr err = SetFrontProcess(&psn);
	if (err != 0) DEBUG(driver, 0, "Could not bring the application to front. Error %d", (int)err);

	/* Set up the menubar */
	[ NSApp setMainMenu:[ [ NSMenu alloc ] init ] ];
	setApplicationMenu();
	setupWindowMenu();

	/* Create OTTDMain and make it the app delegate */
	_ottd_main = [ [ OTTDMain alloc ] init ];
	[ NSApp setDelegate:_ottd_main ];
}

/**
 * Update the video modus.
 *
 * @pre _cocoa_subdriver != NULL
 */
static void QZ_UpdateVideoModes()
{
	assert(_cocoa_subdriver != NULL);

	OTTD_Point modes[32];
	uint count = _cocoa_subdriver->ListModes(modes, lengthof(modes));

	for (uint i = 0; i < count; i++) {
		_resolutions[i].width  = modes[i].x;
		_resolutions[i].height = modes[i].y;
	}

	_num_resolutions = count;
}

/**
 * Handle a change of the display area.
 */
void QZ_GameSizeChanged()
{
	if (_cocoa_subdriver == NULL) return;

	/* Tell the game that the resolution has changed */
	_screen.width = _cocoa_subdriver->GetWidth();
	_screen.height = _cocoa_subdriver->GetHeight();
	_screen.pitch = _cocoa_subdriver->GetWidth();
	_screen.dst_ptr = _cocoa_subdriver->GetPixelBuffer();
	_fullscreen = _cocoa_subdriver->IsFullscreen();

	BlitterFactoryBase::GetCurrentBlitter()->PostResize();

	GameSizeChanged();
}

/**
 * Find a suitable cocoa window subdriver.
 *
 * @param width Width of display area.
 * @param height Height of display area.
 * @param bpp Colour depth of display area.
 * @return Pointer to window subdriver.
 */
static CocoaSubdriver *QZ_CreateWindowSubdriver(int width, int height, int bpp)
{
#if defined(ENABLE_COCOA_QUARTZ) || defined(ENABLE_COCOA_QUICKDRAW)
	CocoaSubdriver *ret;
#endif

#ifdef ENABLE_COCOA_QUARTZ
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
	/* The reason for the version mismatch is due to the fact that the 10.4 binary needs to work on 10.5 as well. */
	if (MacOSVersionIsAtLeast(10, 5, 0)) {
		ret = QZ_CreateWindowQuartzSubdriver(width, height, bpp);
		if (ret != NULL) return ret;
	}
#endif
#endif

#ifdef ENABLE_COCOA_QUICKDRAW
	ret = QZ_CreateWindowQuickdrawSubdriver(width, height, bpp);
	if (ret != NULL) return ret;
#endif

#ifdef ENABLE_COCOA_QUARTZ
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
	/*
	 * If we get here we are running 10.4 or earlier and either openttd was compiled without the QuickDraw driver
	 * or it failed to load for some reason. Fall back to Quartz if possible even though that driver is slower.
	 */
	if (MacOSVersionIsAtLeast(10, 4, 0)) {
		ret = QZ_CreateWindowQuartzSubdriver(width, height, bpp);
		if (ret != NULL) return ret;
	}
#endif
#endif

	return NULL;
}

/**
 * Find a suitable cocoa subdriver.
 *
 * @param width Width of display area.
 * @param height Height of display area.
 * @param bpp Colour depth of display area.
 * @param fullscreen Wether a fullscreen mode is requested.
 * @param fallback Whether we look for a fallback driver.
 * @return Pointer to subdriver.
 * @return Pointer to window subdriver.
 */
static CocoaSubdriver *QZ_CreateSubdriver(int width, int height, int bpp, bool fullscreen, bool fallback)
{
	CocoaSubdriver *ret = fullscreen ? QZ_CreateFullscreenSubdriver(width, height, bpp) : QZ_CreateWindowSubdriver(width, height, bpp);
	if (ret != NULL) return ret;

	if (!fallback) return NULL;

	/* Try again in 640x480 windowed */
	DEBUG(driver, 0, "Setting video mode failed, falling back to 640x480 windowed mode.");
	ret = QZ_CreateWindowSubdriver(640, 480, bpp);
	if (ret != NULL) return ret;

#ifdef _DEBUG
	/* Try fullscreen too when in debug mode */
	DEBUG(driver, 0, "Setting video mode failed, falling back to 640x480 fullscreen mode.");
	ret = QZ_CreateFullscreenSubdriver(640, 480, bpp);
	if (ret != NULL) return ret;
#endif

	return NULL;
}


static FVideoDriver_Cocoa iFVideoDriver_Cocoa;

/**
 * Stop the cocoa video subdriver.
 */
void VideoDriver_Cocoa::Stop()
{
	if (!_cocoa_video_started) return;

	delete _cocoa_subdriver;
	_cocoa_subdriver = NULL;

	[ _ottd_main release ];

	_cocoa_video_started = false;
}

/**
 * Initialize a cocoa video subdriver.
 */
const char *VideoDriver_Cocoa::Start(const char * const *parm)
{
	if (!MacOSVersionIsAtLeast(10, 3, 0)) return "The Cocoa video driver requires Mac OS X 10.3 or later.";

	if (_cocoa_video_started) return "Already started";
	_cocoa_video_started = true;

	setupApplication();

	/* Don't create a window or enter fullscreen if we're just going to show a dialog. */
	if (_cocoa_video_dialog) return NULL;

	int width  = _cur_resolution.width;
	int height = _cur_resolution.height;
	int bpp = BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth();

	_cocoa_subdriver = QZ_CreateSubdriver(width, height, bpp, _fullscreen, true);
	if (_cocoa_subdriver == NULL) {
		Stop();
		return "Could not create subdriver";
	}

	QZ_GameSizeChanged();
	QZ_UpdateVideoModes();

	return NULL;
}

/**
 * Set dirty a rectangle managed by a cocoa video subdriver.
 *
 * @param left Left x cooordinate of the dirty rectangle.
 * @param top Uppder y coordinate of the dirty rectangle.
 * @param width Width of the dirty rectangle.
 * @param height Height of the dirty rectangle.
 */
void VideoDriver_Cocoa::MakeDirty(int left, int top, int width, int height)
{
	assert(_cocoa_subdriver != NULL);

	_cocoa_subdriver->MakeDirty(left, top, width, height);
}

/**
 * Start the main programme loop when using a cocoa video driver.
 */
void VideoDriver_Cocoa::MainLoop()
{
	/* Start the main event loop */
	[ NSApp run ];
}

/**
 * Change the resolution when using a cocoa video driver.
 *
 * @param w New window width.
 * @param h New window height.
 * @return Whether the video driver was successfully updated.
 */
bool VideoDriver_Cocoa::ChangeResolution(int w, int h)
{
	assert(_cocoa_subdriver != NULL);

	bool ret = _cocoa_subdriver->ChangeResolution(w, h);

	QZ_GameSizeChanged();
	QZ_UpdateVideoModes();

	return ret;
}

/**
 * Toggle between windowed and full screen mode for cocoa display driver.
 *
 * @param full_screen Whether to switch to full screen or not.
 * @return Whether the mode switch was successful.
 */
bool VideoDriver_Cocoa::ToggleFullscreen(bool full_screen)
{
	assert(_cocoa_subdriver != NULL);

	bool oldfs = _cocoa_subdriver->IsFullscreen();
	if (full_screen != oldfs) {
		int width  = _cocoa_subdriver->GetWidth();
		int height = _cocoa_subdriver->GetHeight();
		int bpp    = BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth();

		delete _cocoa_subdriver;
		_cocoa_subdriver = NULL;

		_cocoa_subdriver = QZ_CreateSubdriver(width, height, bpp, full_screen, false);
		if (_cocoa_subdriver == NULL) {
			_cocoa_subdriver = QZ_CreateSubdriver(width, height, bpp, oldfs, true);
			if (_cocoa_subdriver == NULL) error("Cocoa: Failed to create subdriver");
		}
	}

	QZ_GameSizeChanged();
	QZ_UpdateVideoModes();

	return _cocoa_subdriver->IsFullscreen() == full_screen;
}

/**
 * Catch asserts prior to initialization of the videodriver.
 *
 * @param title Window title.
 * @param message Message text.
 * @param buttonLabel Button text.
 *
 * @note This is needed since sometimes assert is called before the videodriver is initialized .
 */
void CocoaDialog(const char *title, const char *message, const char *buttonLabel)
{
	_cocoa_video_dialog = true;

	bool wasstarted = _cocoa_video_started;
	if (_video_driver == NULL) {
		setupApplication(); // Setup application before showing dialog
	} else if (!_cocoa_video_started && _video_driver->Start(NULL) != NULL) {
		fprintf(stderr, "%s: %s\n", title, message);
		return;
	}

	NSRunAlertPanel([ NSString stringWithUTF8String:title ], [ NSString stringWithUTF8String:message ], [ NSString stringWithUTF8String:buttonLabel ], nil, nil);

	if (!wasstarted && _video_driver != NULL) _video_driver->Stop();

	_cocoa_video_dialog = false;
}

/** Set the application's bundle directory.
 *
 * This is needed since OS X application bundles do not have a
 * current directory and the data files are 'somewhere' in the bundle.
 */
void cocoaSetApplicationBundleDir()
{
	char tmp[MAXPATHLEN];
	CFURLRef url = CFBundleCopyResourcesDirectoryURL(CFBundleGetMainBundle());
	if (CFURLGetFileSystemRepresentation(url, true, (unsigned char*)tmp, MAXPATHLEN)) {
		AppendPathSeparator(tmp, lengthof(tmp));
		_searchpaths[SP_APPLICATION_BUNDLE_DIR] = strdup(tmp);
	} else {
		_searchpaths[SP_APPLICATION_BUNDLE_DIR] = NULL;
	}

	CFRelease(url);
}

/**
 * Setup autorelease for the application pool.
 *
 * These are called from main() to prevent a _NSAutoreleaseNoPool error when
 * exiting before the cocoa video driver has been loaded
 */
void cocoaSetupAutoreleasePool()
{
	_ottd_autorelease_pool = [ [ NSAutoreleasePool alloc ] init ];
}

/**
 * Autorelease the application pool.
 */
void cocoaReleaseAutoreleasePool()
{
	[ _ottd_autorelease_pool release ];
}


/**
 * Re-implement the system cursor in order to allow hiding and showing it nicely
 */
@implementation NSCursor (OTTD_CocoaCursor)
+ (NSCursor *) clearCocoaCursor
{
	/* RAW 16x16 transparent GIF */
	unsigned char clearGIFBytes[] = {
		0x47, 0x49, 0x46, 0x38, 0x37, 0x61, 0x10, 0x00, 0x10, 0x00, 0x80, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0xF9, 0x04, 0x01, 0x00,
		0x00, 0x01, 0x00, 0x2C, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x10, 0x00,
		0x00, 0x02, 0x0E, 0x8C, 0x8F, 0xA9, 0xCB, 0xED, 0x0F, 0xA3, 0x9C, 0xB4,
		0xDA, 0x8B, 0xB3, 0x3E, 0x05, 0x00, 0x3B};
	NSData *clearGIFData = [ NSData dataWithBytesNoCopy:&clearGIFBytes[0] length:55 freeWhenDone:NO ];
	NSImage *clearImg = [ [ NSImage alloc ] initWithData:clearGIFData ];
	return [ [ NSCursor alloc ] initWithImage:clearImg hotSpot:NSMakePoint(0.0,0.0) ];
}
@end



@implementation OTTD_CocoaWindow

- (void)setDriver:(CocoaSubdriver*)drv
{
	driver = drv;
}
/**
  * Minimize the window
  */
- (void)miniaturize:(id)sender
{
	/* make the alpha channel opaque so anim won't have holes in it */
	driver->SetPortAlphaOpaque();

	/* window is hidden now */
	driver->active = false;

	[ super miniaturize:sender ];
}

/**
 * This method fires just before the window deminaturizes from the Dock.
 * We'll save the current visible surface, let the window manager redraw any
 * UI elements, and restore the surface. This way, no expose event
 * is required, and the deminiaturize works perfectly.
 */
- (void)display
{
	driver->SetPortAlphaOpaque();

	/* save current visible surface */
	[ self cacheImageInRect:[ driver->cocoaview frame ] ];

	/* let the window manager redraw controls, border, etc */
	[ super display ];

	/* restore visible surface */
	[ self restoreCachedImage ];

	/* window is visible again */
	driver->active = true;
}
/**
 * Define the rectangle we draw our window in
 */
- (void)setFrame:(NSRect)frameRect display:(BOOL)flag
{
	[ super setFrame:frameRect display:flag ];

	/* Don't do anything if the window is currently being created */
	if (driver->setup) return;

	if (!driver->WindowResized()) error("Cocoa: Failed to resize window.");
}
/**
 * Handle hiding of the application
 */
- (void)appDidHide:(NSNotification*)note
{
	driver->active = false;
}
/**
 * Fade-in the application and restore display plane
 */
- (void)appWillUnhide:(NSNotification*)note
{
	driver->SetPortAlphaOpaque ();

	/* save current visible surface */
	[ self cacheImageInRect:[ driver->cocoaview frame ] ];
}
/**
 * Unhide and restore display plane and re-activate driver
 */
- (void)appDidUnhide:(NSNotification*)note
{
	/* restore cached image, since it may not be current, post expose event too */
	[ self restoreCachedImage ];

	driver->active = true;
}
/**
 * Initialize event system for the application rectangle
 */
- (id)initWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)styleMask backing:(NSBackingStoreType)backingType defer:(BOOL)flag
{
	/* Make our window subclass receive these application notifications */
	[ [ NSNotificationCenter defaultCenter ] addObserver:self
		selector:@selector(appDidHide:) name:NSApplicationDidHideNotification object:NSApp ];

	[ [ NSNotificationCenter defaultCenter ] addObserver:self
		selector:@selector(appDidUnhide:) name:NSApplicationDidUnhideNotification object:NSApp ];

	[ [ NSNotificationCenter defaultCenter ] addObserver:self
		selector:@selector(appWillUnhide:) name:NSApplicationWillUnhideNotification object:NSApp ];

	return [ super initWithContentRect:contentRect styleMask:styleMask backing:backingType defer:flag ];
}

@end




@implementation OTTD_CocoaView
/**
 * Initialize the driver
 */
- (void)setDriver:(CocoaSubdriver*)drv
{
	driver = drv;
}
/**
 * Define the opaqueness of the window / screen
 * @return opaqueness of window / screen
 */
- (BOOL)isOpaque
{
	return YES;
}
/**
 * Draws a rectangle on the screen.
 * It's overwritten by the individual drivers but must be defined
 */
- (void)drawRect:(NSRect)invalidRect
{
	return;
}
/**
 * Allow to handle events
 */
- (BOOL)acceptsFirstResponder
{
	return YES;
}
/**
 * Actually handle events
 */
- (BOOL)becomeFirstResponder
{
	return YES;
}
/**
 * Define the rectangle where we draw our application window
 */
- (void)setTrackingRect
{
	NSPoint loc = [ self convertPoint:[ [ self window ] mouseLocationOutsideOfEventStream ] fromView:nil ];
	BOOL inside = ([ self hitTest:loc ]==self);
	if(inside) [ [ self window] makeFirstResponder:self ];
	trackingtag = [ self addTrackingRect:[self visibleRect] owner:self userData:nil assumeInside:inside ];
}
/**
 * Return responsibility for the application window to system
 */
- (void)clearTrackingRect
{
	[ self removeTrackingRect:trackingtag ];
}
/**
 * Declare responsibility for the cursor within our application rect
 */
- (void)resetCursorRects
{
	[ super resetCursorRects ];
	[ self clearTrackingRect ];
	[ self setTrackingRect ];
	[ self addCursorRect:[ self bounds ] cursor:[ NSCursor clearCocoaCursor ] ];
}
/**
 * Prepare for moving the application window
 */
- (void)viewWillMoveToWindow:(NSWindow *)win
{
	if (!win && [ self window ]) [ self clearTrackingRect ];
}
/**
 * Restore our responsibility for our application window after moving
 */
- (void)viewDidMoveToWindow
{
	if([ self window ]) [ self setTrackingRect ];
}
/**
 * Make OpenTTD aware that it has control over the mouse
 */
- (void)mouseEntered:(NSEvent *)theEvent
{
	_cursor.in_window = true;
}
/**
 * Make OpenTTD aware that it has NOT control over the mouse
 */
- (void)mouseExited:(NSEvent *)theEvent
{
	if (_cocoa_subdriver != NULL) UndrawMouseCursor();
	_cursor.in_window = false;
}
@end



@implementation OTTD_CocoaWindowDelegate
/** Initialize the video driver */
- (void)setDriver:(CocoaSubdriver*)drv
{
	driver = drv;
}
/** Handle closure requests */
- (BOOL)windowShouldClose:(id)sender
{
	HandleExitGameRequest();

	return NO;
}
/** Handle key acceptance */
- (void)windowDidBecomeKey:(NSNotification*)aNotification
{
	driver->active = true;
}
/** Resign key acceptance */
- (void)windowDidResignKey:(NSNotification*)aNotification
{
	driver->active = false;
}
/** Handle becoming main window */
- (void)windowDidBecomeMain:(NSNotification*)aNotification
{
	driver->active = true;
}
/** Resign being main window */
- (void)windowDidResignMain:(NSNotification*)aNotification
{
	driver->active = false;
}

@end

#endif /* WITH_COCOA */