/*

 SDL - Simple DirectMedia Layer

 Copyright (C) 1997-2009 Sam Lantinga

 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 St, Fifth Floor, Boston, MA  02110-1301  USA

 Sam Lantinga, mods for Hedgewars by Vittorio Giovara

 slouken@libsdl.org, vittorio.giovara@gmail.com

 */

#include "PascalImports.h"

#import "SDL_uikitview.h"

#if SDL_IPHONE_KEYBOARD

#import "SDL_keyboard_c.h"

#import "keyinfotable.h"

#import "SDL_uikitwindow.h"

#endif

@implementation SDL_uikitview

- (void)dealloc {

#if SDL_IPHONE_KEYBOARD

	SDL_DelKeyboard(0);

	[textField release];

#endif

	[super dealloc];

}

- (id)initWithFrame:(CGRect)frame {

	self = [super initWithFrame: frame];

#if SDL_IPHONE_KEYBOARD

	[self initializeKeyboard];

#endif	

	int i;

	for (i=0; i<MAX_SIMULTANEOUS_TOUCHES; i++) {

        mice[i].id = i;

		mice[i].driverdata = NULL;

		SDL_AddMouse(&mice[i], "Mouse", 0, 0, 1);

	}

	self.multipleTouchEnabled = YES;

	return self;

}

#pragma mark -

#pragma mark Custom SDL_UIView input handling

// we override default touch input to implement our own gestures

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

	/*NSEnumerator *enumerator = [touches objectEnumerator];

	UITouch *touch =(UITouch*)[enumerator nextObject];

	/* associate touches with mice, so long as we have slots 

	int i;

	int found = 0;

	for(i=0; touch && i < MAX_SIMULTANEOUS_TOUCHES; i++) {

		/* check if this mouse is already tracking a touch 

		if (mice[i].driverdata != NULL) {

			continue;

		}

		/*	

			mouse not associated with anything right now,

			associate the touch with this mouse

		found = 1;

		/* save old mouse so we can switch back 

		int oldMouse = SDL_SelectMouse(-1);

		/* select this slot's mouse 

		SDL_SelectMouse(i);

		CGPoint locationInView = [touch locationInView: self];

		/* set driver data to touch object, we'll use touch object later 

		mice[i].driverdata = [touch retain];

		/* send moved event 

		SDL_SendMouseMotion(i, 0, locationInView.x, locationInView.y, 0);

		/* send mouse down event 

		SDL_SendMouseButton(i, SDL_PRESSED, SDL_BUTTON_LEFT);

		/* re-calibrate relative mouse motion 

		SDL_GetRelativeMouseState(i, NULL, NULL);

		/* grab next touch 

		touch = (UITouch*)[enumerator nextObject]; 

		/* switch back to our old mouse 

		SDL_SelectMouse(oldMouse);

	}	*/

	UITouch *touch = [touches anyObject];

	if (2 == [touch tapCount] ) {

		HW_ammoMenu();

	}

	if (2 == [touches count]) {

		NSArray *twoTouches = [touches allObjects];

		UITouch *first = [twoTouches objectAtIndex:0];

		UITouch *second = [twoTouches objectAtIndex:1];

		initialDistance = distanceBetweenPoints([first locationInView:self], [second locationInView:self]);

	}

}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {

	initialDistance = 0;

	/*NSEnumerator *enumerator = [touches objectEnumerator];

	UITouch *touch=nil;

	while(touch = (UITouch *)[enumerator nextObject]) {

		/* search for the mouse slot associated with this touch 

		int i, found = NO;

		for (i=0; i<MAX_SIMULTANEOUS_TOUCHES && !found; i++) {

			if (mice[i].driverdata == touch) {

				/* found the mouse associate with the touch 

				[(UITouch*)(mice[i].driverdata) release];

				mice[i].driverdata = NULL;

				/* send mouse up 

				SDL_SendMouseButton(i, SDL_RELEASED, SDL_BUTTON_LEFT);

				/* discontinue search for this touch 

				found = YES;

			}

		}

	}*/

}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {

	/*

		this can happen if the user puts more than 5 touches on the screen

		at once, or perhaps in other circumstances.  Usually (it seems)

		all active touches are canceled.

	*/

	[self touchesEnded: touches withEvent: event];

}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

	if (2 == [touches count]) {

		NSArray *twoTouches = [touches allObjects];

		UITouch *first = [twoTouches objectAtIndex:0];

		UITouch *second = [twoTouches objectAtIndex:1];

		CGFloat currentDistance = distanceBetweenPoints([first locationInView:self], [second locationInView:self]);

		if (0 == initialDistance) 

			initialDistance = currentDistance;

		else if (currentDistance - initialDistance > kMinimumPinchDelta) {

			NSLog(@"Outward pinch detected");

			HW_zoomOut();

		}

		else if (initialDistance - currentDistance > kMinimumPinchDelta) {

			NSLog(@"Inward pinch detected");

			HW_zoomIn();

		}

	}

		// try to find the mouse associated with this touch 

		int i, found = NO;

		for (i=0; i<MAX_SIMULTANEOUS_TOUCHES && !found; i++) {

			if (mice[i].driverdata == touch) {

				// found proper mouse 

				CGPoint locationInView = [touch locationInView: self];

				// send moved event 

				SDL_SendMouseMotion(i, 0, locationInView.x, locationInView.y, 0);

				// discontinue search 

				found = YES;

			}

		}

	}*/

}

#pragma mark -

#pragma mark default routines

/*

	---- Keyboard related functionality below this line ----

*/

#if SDL_IPHONE_KEYBOARD

/* Is the iPhone virtual keyboard visible onscreen? */

- (BOOL)keyboardVisible {

	return keyboardVisible;

}

/* Set ourselves up as a UITextFieldDelegate */

- (void)initializeKeyboard {

	textField = [[[UITextField alloc] initWithFrame: CGRectZero] autorelease];

	textField.delegate = self;

	/* placeholder so there is something to delete! */

	textField.text = @" ";	

	/* set UITextInputTrait properties, mostly to defaults */

	textField.autocapitalizationType = UITextAutocapitalizationTypeNone;

	textField.autocorrectionType = UITextAutocorrectionTypeNo;

	textField.enablesReturnKeyAutomatically = NO;

	textField.keyboardAppearance = UIKeyboardAppearanceDefault;

	textField.keyboardType = UIKeyboardTypeDefault;

	textField.returnKeyType = UIReturnKeyDefault;

	textField.secureTextEntry = NO;	

	textField.hidden = YES;

	keyboardVisible = NO;

	/* add the UITextField (hidden) to our view */

	[self addSubview: textField];

	/* create our SDL_Keyboard */

	SDL_Keyboard keyboard;

	SDL_zero(keyboard);

	SDL_AddKeyboard(&keyboard, 0);

	SDLKey keymap[SDL_NUM_SCANCODES];

	SDL_GetDefaultKeymap(keymap);

	SDL_SetKeymap(0, 0, keymap, SDL_NUM_SCANCODES);

}

/* reveal onscreen virtual keyboard */

- (void)showKeyboard {

	keyboardVisible = YES;

	[textField becomeFirstResponder];

}

/* hide onscreen virtual keyboard */

- (void)hideKeyboard {

	keyboardVisible = NO;

	[textField resignFirstResponder];

}

/* UITextFieldDelegate method.  Invoked when user types something. */

- (BOOL)textField:(UITextField *)_textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

	if ([string length] == 0) {

		/* it wants to replace text with nothing, ie a delete */

		SDL_SendKeyboardKey( 0, SDL_PRESSED, SDL_SCANCODE_DELETE);

		SDL_SendKeyboardKey( 0, SDL_RELEASED, SDL_SCANCODE_DELETE);

	}

	else {

		/* go through all the characters in the string we've been sent

		   and convert them to key presses */

		int i;

		for (i=0; i<[string length]; i++) {

			unichar c = [string characterAtIndex: i];

			Uint16 mod = 0;

			SDL_scancode code;

			if (c < 127) {

				/* figure out the SDL_scancode and SDL_keymod for this unichar */

				code = unicharToUIKeyInfoTable[c].code;

				mod  = unicharToUIKeyInfoTable[c].mod;

			}

			else {

				/* we only deal with ASCII right now */

				code = SDL_SCANCODE_UNKNOWN;

				mod = 0;

			}

			if (mod & KMOD_SHIFT) {

				/* If character uses shift, press shift down */

				SDL_SendKeyboardKey( 0, SDL_PRESSED, SDL_SCANCODE_LSHIFT);

			}

			/* send a keydown and keyup even for the character */

			SDL_SendKeyboardKey( 0, SDL_PRESSED, code);

			SDL_SendKeyboardKey( 0, SDL_RELEASED, code);

			if (mod & KMOD_SHIFT) {

				/* If character uses shift, press shift back up */

				SDL_SendKeyboardKey( 0, SDL_RELEASED, SDL_SCANCODE_LSHIFT);

			}			

		}

	}

	return NO; /* don't allow the edit! (keep placeholder text there) */

}

/* Terminates the editing session */

- (BOOL)textFieldShouldReturn:(UITextField*)_textField {

	[self hideKeyboard];

	return YES;

}

#endif

@end

/* iPhone keyboard addition functions */

#if SDL_IPHONE_KEYBOARD

int SDL_iPhoneKeyboardShow(SDL_WindowID windowID) {

	SDL_Window *window = SDL_GetWindowFromID(windowID);

	SDL_WindowData *data;

	SDL_uikitview *view;

	if (NULL == window) {

		SDL_SetError("Window does not exist");

		return -1;

	}

	data = (SDL_WindowData *)window->driverdata;

	view = data->view;

	if (nil == view) {

		SDL_SetError("Window has no view");

		return -1;

	}

	else {

		[view showKeyboard];

		return 0;

	}

}

int SDL_iPhoneKeyboardHide(SDL_WindowID windowID) {

	SDL_Window *window = SDL_GetWindowFromID(windowID);

	SDL_WindowData *data;

	SDL_uikitview *view;

	if (NULL == window) {

		SDL_SetError("Window does not exist");

		return -1;

	}	

	data = (SDL_WindowData *)window->driverdata;

	view = data->view;

	if (NULL == view) {

		SDL_SetError("Window has no view");

		return -1;

	}

	else {

		[view hideKeyboard];

		return 0;

	}

}

SDL_bool SDL_iPhoneKeyboardIsShown(SDL_WindowID windowID) {

	SDL_Window *window = SDL_GetWindowFromID(windowID);

	SDL_WindowData *data;

	SDL_uikitview *view;

	if (NULL == window) {

		SDL_SetError("Window does not exist");

		return -1;

	}	

	data = (SDL_WindowData *)window->driverdata;

	view = data->view;

	if (NULL == view) {

		SDL_SetError("Window has no view");

		return 0;

	}

	else {

		return view.keyboardVisible;

	}

}

int SDL_iPhoneKeyboardToggle(SDL_WindowID windowID) {

	SDL_Window *window = SDL_GetWindowFromID(windowID);

	SDL_WindowData *data;

	SDL_uikitview *view;

	if (NULL == window) {

		SDL_SetError("Window does not exist");

		return -1;

	}	

	data = (SDL_WindowData *)window->driverdata;

	view = data->view;

	if (NULL == view) {

		SDL_SetError("Window has no view");

		return -1;

	}

	else {

		if (SDL_iPhoneKeyboardIsShown(windowID)) {

			SDL_iPhoneKeyboardHide(windowID);

		}

		else {

			SDL_iPhoneKeyboardShow(windowID);

		}

		return 0;

	}

}

#else

/* stubs, used if compiled without keyboard support */

int SDL_iPhoneKeyboardShow(SDL_WindowID windowID) {

	SDL_SetError("Not compiled with keyboard support");

	return -1;

}

int SDL_iPhoneKeyboardHide(SDL_WindowID windowID) {

	SDL_SetError("Not compiled with keyboard support");

	return -1;

}

SDL_bool SDL_iPhoneKeyboardIsShown(SDL_WindowID windowID) {

	return 0;

}

int SDL_iPhoneKeyboardToggle(SDL_WindowID windowID) {

	SDL_SetError("Not compiled with keyboard support");

	return -1;

}

#endif /* SDL_IPHONE_KEYBOARD */