/*

 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

 */

#import "PascalImports.h"

#import "CGPointUtils.h"

#import "SDL_uikitview.h"

#import "SDL_uikitappdelegate.h"

#if SDL_IPHONE_KEYBOARD

#import "SDL_keyboard_c.h"

#import "keyinfotable.h"

#import "SDL_uikitwindow.h"

#endif

@implementation SDL_uikitview

// they have to be global variables to allow showControls() to use them

UIButton *attackButton, *menuButton;

-(void) dealloc {

#if SDL_IPHONE_KEYBOARD

	SDL_DelKeyboard(0);

	[textField release];

#endif

	[menuButton release];

	[attackButton release];

	[super dealloc];

}

- (id)initWithFrame:(CGRect)frame {

	// the addTarget parameter for the buttons below is set like that because

	// this object is inherited by SDL_openglesview.m which is the one allocated by SDL.

	// We select this class with [self superclass] and call the selectors with "+" because

	// they are superclass methods 

	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;

	self.exclusiveTouch = YES;

/*

	// custom code

	// the coordinate system is still like in Portrait even though everything is rotated

	attackButton = [[UIButton alloc] initWithFrame:CGRectMake(30, 480, 260, 50)];

	[attackButton setBackgroundImage:[UIImage imageNamed:@"Default.png"] forState:UIControlStateNormal];

	[attackButton setBackgroundImage:[UIImage imageNamed:@"Default.png"] forState:UIControlStateHighlighted];

	[attackButton addTarget:[self superclass] action:@selector(attackButtonPressed) forControlEvents:UIControlEventTouchDown];

	[attackButton addTarget:[self superclass] action:@selector(buttonsReleased) forControlEvents:UIControlEventTouchUpInside|UIControlEventTouchUpOutside];

	//[self addSubview:attackButton];

	menuButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 480, 30, 50)];

	[menuButton setBackgroundImage:[UIImage imageNamed:@"Default.png"] forState:UIControlStateNormal];

	[menuButton addTarget:[self superclass] action:@selector(attackButtonPressed) forControlEvents:UIControlEventTouchUpInside];

	[menuButton addTarget:[self superclass] action:@selector(buttonsReleased) forControlEvents:UIControlEventTouchUpInside|UIControlEventTouchUpOutside];

	//[self addSubview:menuButton];

	UIButton *walkLeftButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 320, 100)];

	[walkLeftButton addTarget:[self superclass] action:@selector(walkingLeft) forControlEvents:UIControlEventTouchDown];

	[walkLeftButton addTarget:[self superclass] action:@selector(buttonsReleased) forControlEvents:UIControlEventTouchUpInside|UIControlEventTouchUpOutside];

	[self insertSubview:walkLeftButton atIndex:0];

	[walkLeftButton release];

	UIButton *walkRightButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 380, 320, 100)];

	[walkRightButton addTarget:[self superclass] action:@selector(walkingRight) forControlEvents:UIControlEventTouchDown];

	[walkRightButton addTarget:[self superclass] action:@selector(buttonsReleased) forControlEvents:UIControlEventTouchUpInside|UIControlEventTouchUpOutside];

	[self insertSubview:walkRightButton atIndex:0];

	[walkRightButton release];

	UIButton *moveDownButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 100, 70, 280)];

	[moveDownButton addTarget:[self superclass] action:@selector(movingDown) forControlEvents:UIControlEventTouchDown];

	[moveDownButton addTarget:[self superclass] action:@selector(buttonsReleased) forControlEvents:UIControlEventTouchUpInside|UIControlEventTouchUpOutside];

	[self insertSubview:moveDownButton atIndex:0];

	[moveDownButton release];

	UIButton *moveUpButton = [[UIButton alloc] initWithFrame:CGRectMake(250, 100, 70, 280)];

	[moveUpButton addTarget:[self superclass] action:@selector(movingUp) forControlEvents:UIControlEventTouchDown];

	[moveUpButton addTarget:[self superclass] action:@selector(buttonsReleased) forControlEvents:UIControlEventTouchUpInside|UIControlEventTouchUpOutside];

	[self insertSubview:moveUpButton atIndex:0];

	[moveUpButton release];

	//dummy button used to test chat

	UIButton *chatButton = [[UIButton alloc] initWithFrame:CGRectMake(70, 100, 250, 280)];

	[chatButton addTarget:[self superclass] action:@selector(chatBegin) forControlEvents:UIControlEventTouchDown];

	[self insertSubview:chatButton atIndex:0];

	[chatButton release];

	*/

	return self;

}

#pragma mark -

#pragma mark Exported functions for FreePascal

const char* IPH_getDocumentsPath() {

	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

	NSString *documentsDirectory = [paths objectAtIndex: 0];

	return [documentsDirectory UTF8String];

}

void IPH_showControls (void) {

	NSLog(@"Showing controls");

	/*

	[UIView beginAnimations:nil context:NULL];

	[UIView setAnimationDuration:0.5];

	attackButton.frame = CGRectMake(30, 430, 260, 50);

	menuButton.frame = CGRectMake(0, 430, 30, 50);

	[UIView commitAnimations];

	 */

}

#pragma mark -

#pragma mark Superclass methods to call Pascal code

+(void) attackButtonPressed {

	HW_shoot();

}

+(void) buttonsReleased {

	HW_allKeysUp();

}

+(void) walkingLeft {

	HW_walkLeft();

}

+(void) walkingRight {

	HW_walkRight();

}

+(void) movingUp {

	HW_aimUp();

}

+(void) movingDown {

	HW_aimDown();

}

+(void) chatBegin {

	//TODO: implement a UITextScroll and put received chat lines in there

}

#pragma mark -

#pragma mark Custom SDL_UIView input handling

#define kMinimumPinchDelta	50

#define kMinimumGestureLength	10

#define kMaximumVariance	3

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

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

	NSArray *twoTouches;

	UITouch *touch = [touches anyObject];

	switch ([touches count]) {

		case 1:

			gestureStartPoint = [touch locationInView:self];

			initialDistanceForPinching = 0;

			switch ([touch tapCount]) {

				case 1:

					NSLog(@"X:%d Y:%d", (int)gestureStartPoint.x, (int)gestureStartPoint.y );

					SDL_WarpMouseInWindow([SDLUIKitDelegate sharedAppDelegate].window, 

							      (int)gestureStartPoint.y, 320 - (int)gestureStartPoint.x);

					HW_click();

					break;

				case 2:

					HW_ammoMenu();

					break;

				default:

					break;

			}

			break;

		case 2:

			if (2 == [touch tapCount]) {

				HW_zoomReset();

			}

			// pinching

			twoTouches = [touches allObjects];

			UITouch *first = [twoTouches objectAtIndex:0];

			UITouch *second = [twoTouches objectAtIndex:1];

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

			break;

		default:

			break;

	}

}

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

	initialDistanceForPinching = 0;

	gestureStartPoint.x = 0;

	gestureStartPoint.y = 0;

	HW_allKeysUp();

}

- (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 {

	NSArray *twoTouches;

	CGPoint currentPosition;

	UITouch *touch = [touches anyObject];

	switch ([touches count]) {

		case 1:

			currentPosition = [touch locationInView:self];

			// panning

			SDL_WarpMouseInWindow([SDLUIKitDelegate sharedAppDelegate].window, 

							(int)gestureStartPoint.y, 320 - (int)gestureStartPoint.x);

			// remember that we have x and y inverted

			/* temporarily disabling hog movements for camera panning testing

			CGFloat vertDiff = gestureStartPoint.x - currentPosition.x;

			CGFloat horizDiff = gestureStartPoint.y - currentPosition.y;

			CGFloat deltaX = fabsf(vertDiff);

			CGFloat deltaY = fabsf(horizDiff);

			if (deltaY >= kMinimumGestureLength && deltaX <= kMaximumVariance) {

				NSLog(@"Horizontal swipe detected, begX:%f curX:%f", gestureStartPoint.x, currentPosition.x);

				if (horizDiff > 0) HW_walkLeft();

				else HW_walkRight();

			} else if (deltaX >= kMinimumGestureLength && deltaY <= kMaximumVariance){

				NSLog(@"Vertical swipe detected, begY:%f curY:%f", gestureStartPoint.y, currentPosition.y);

				if (vertDiff < 0) HW_aimUp();

				else HW_aimDown();

			}

			*/

			break;

		case 2:

			twoTouches = [touches allObjects];

			UITouch *first = [twoTouches objectAtIndex:0];

			UITouch *second = [twoTouches objectAtIndex:1];

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

			if (0 == initialDistanceForPinching) 

				initialDistanceForPinching = currentDistanceOfPinching;

			if (currentDistanceOfPinching < initialDistanceForPinching + kMinimumPinchDelta)

				HW_zoomOut();

			else if (currentDistanceOfPinching > initialDistanceForPinching + kMinimumPinchDelta)

				HW_zoomIn();

			currentDistanceOfPinching = initialDistanceForPinching;

			break;

		default:

			break;

	}

}

/*

#pragma mark -

#pragma mark Keyboard related functionality

#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_Window *window) {

	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_Window *window) {

	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_Window *window) {

	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_Window *window) {

	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(window)) {

			SDL_iPhoneKeyboardHide(window);

		}

		else {

			SDL_iPhoneKeyboardShow(window);

		}

		return 0;

	}

}

#else

// stubs, used if compiled without keyboard support

int SDL_iPhoneKeyboardShow(SDL_Window *window) {

	SDL_SetError("Not compiled with keyboard support");

	return -1;

}

int SDL_iPhoneKeyboardHide(SDL_Window *window) {

	SDL_SetError("Not compiled with keyboard support");

	return -1;

}

SDL_bool SDL_iPhoneKeyboardIsShown(SDL_Window *window) {

	return 0;

}

int SDL_iPhoneKeyboardToggle(SDL_Window *window) {

	SDL_SetError("Not compiled with keyboard support");

	return -1;

}

#endif /* SDL_IPHONE_KEYBOARD */