/*

 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"

#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;

	// custom code

	[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];

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

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

	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 -

+(void) attackButtonPressed {

	HW_shoot();

}

	HW_allKeysUp();

}

#pragma mark -

#pragma mark Custom SDL_UIView input handling

#define kMinimumGestureLength	10

#define kMaximumVariance	3

// 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];

		CGFloat oldX = locationInView.x;

		locationInView.x = locationInView.y;

		locationInView.y = 320 - oldX;

		// 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];

	switch ([touches count]) {

		case 1:

			gestureStartPoint = [touch locationInView:self];

			initialDistanceForPinching = 0;

			switch ([touch tapCount]) {

				case 1:

					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

			NSArray *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;

	HW_allKeysUp();

	/*

	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 {

	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;

	}

	/*

	NSEnumerator *enumerator = [touches objectEnumerator];

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

		// 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_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;