//
//  fsStateMachine.h
//  fuzzspaces
//
//  Created by fuzzimac4 on 6/4/09.
//  Copyright 2009 __MyCompanyName__. All rights reserved.
//

#import "sio2.h"

//  How many previous positions to record for a touch
#define FS_TOUCH_LAST_POSITIONS     ((unsigned int) 10)

//  Time until a touch is considered to be held (in seconds)
#define FS_TOUCH_IS_HELD_AFTER      ((NSTimeInterval) 1.0)

//  Total distance for touch to have moved to qualify as dragging (sensitivity in pixels)
#define FS_TOUCH_IS_DRAGGED_AFTER   ((double) 20.0)

//  Which state register are we in?
#define FS_STATE_REGISTER_ENVIRONMENT       ((unsigned short) (1 << 0))
#define FS_STATE_REGISTER_MENU              ((unsigned short) (1 << 1))
#define FS_STATE_REGISTER_TOOL              ((unsigned short) (1 << 2))
#define FS_STATE_REGISTER_VIEW              ((unsigned short) (1 << 3))
#define FS_STATE_REGISTER_TOUCH             ((unsigned short) (1 << 4))
#define FS_STATE_REGISTER_MULTITOUCH        ((unsigned short) (1 << 5))

//  Environment state register
#define FS_STATE_START                      ((unsigned short) (1 << 0))
#define FS_STATE_ERROR                      ((unsigned short) (1 << 1))
#define FS_STATE_DEBUG                      ((unsigned short) (1 << 2))
#define FS_STATE_SCREEN_TOUCH               ((unsigned short) (1 << 3))
#define FS_STATE_SCREEN_MULTITOUCH          ((unsigned short) (1 << 4))
#define FS_STATE_MENU_IS_CONTEXT_SENSITIVE  ((unsigned short) (1 << 5))
#define FS_STATE_MENU_IS_ALWAYS_ENABLED     ((unsigned short) (1 << 6))
#define FS_STATE_NO_SELECTION               ((unsigned short) (1 << 7))
#define FS_STATE_OBJECT_SELECTION           ((unsigned short) (1 << 8))
#define FS_STATE_FACET_SELECTION            ((unsigned short) (1 << 9))

//  Menu state register
#define FS_STATE_MENU_MODIFY                ((unsigned short) (1 << 0))
#define FS_STATE_MENU_TRANSFORM             ((unsigned short) (1 << 1))
#define FS_STATE_MENU_CREATE                ((unsigned short) (1 << 2))
#define FS_STATE_MENU_VIEW                  ((unsigned short) (1 << 3))

//  Tool state register
#define FS_STATE_TOOL_EXTRUDE               ((unsigned short) (1 << 0))
#define FS_STATE_TOOL_TRANSLATE             ((unsigned short) (1 << 1))
#define FS_STATE_TOOL_ROTATE                ((unsigned short) (1 << 2))
#define FS_STATE_TOOL_SCALE                 ((unsigned short) (1 << 3))
#define FS_STATE_TOOL_POLY_SQUARE           ((unsigned short) (1 << 4))

//  View state register
#define FS_STATE_VIEW_PAN                   ((unsigned short) (1 << 0))
#define FS_STATE_VIEW_ROTATE                ((unsigned short) (1 << 1))
#define FS_STATE_VIEW_MOVE                  ((unsigned short) (1 << 2))

//  Touch state register
#define FS_STATE_SCREEN_TOUCH_DRAG              ((unsigned short) (1 << 0))
#define FS_STATE_SCREEN_TOUCH_HOLD              ((unsigned short) (1 << 1))

//  Multitouch state register
#define FS_STATE_SCREEN_MULTITOUCH_PINCH_IN     ((unsigned short) (1 << 0))
#define FS_STATE_SCREEN_MULTITOUCH_PINCH_OUT    ((unsigned short) (1 << 1))
#define FS_STATE_SCREEN_MULTITOUCH_ROTATE       ((unsigned short) (1 << 2))

struct fsInputState {
    unsigned short registerEnvironment;
    unsigned short registerMenu;
    unsigned short registerTool;
    unsigned short registerView;
    unsigned short registerTouch;
    unsigned short registerMultitouch;
};
typedef struct fsInputState fsInputState;

struct fsInputStateDiff {
    fsInputState unsetStates;
    fsInputState setStates;
    fsInputState testStates;
    unsigned short clearRegisters;
};
typedef struct fsInputStateDiff fsInputStateDiff;

@interface fsStateMachine : NSObject {
    fsInputState *inputState;
    unsigned int touchAccumulator;
    NSTimer *touchTimer;
    NSRunLoop *mainRunLoop;
    vec2 *touchPositions;
    vec2 *touch2Positions;
    void (*currentStateCallback)(void);
}

@property unsigned int touchAccumulator;
@property (retain) NSTimer *touchTimer;
@property vec2 *touchPositions;
@property vec2 *touch2Positions;

- (fsStateMachine *) init;
- (void) dealloc;

- (unsigned short *) registerOffsetFor:(unsigned short)stateRegister;
- (void) setState:(unsigned short)stateFlag inRegister:(unsigned short)stateRegister;
- (BOOL) isState:(unsigned short)stateFlag inRegister:(unsigned short)stateRegister;
- (void) resetState:(unsigned short)stateFlag inRegister:(unsigned short)stateRegister;
- (void) resetRegister:(unsigned short)stateRegister;
- (void) applyStateDiff:(fsInputStateDiff *)stateDiff;

- (void) updateTouchesForWindow:(SIO2window *)_SIO2window;
- (void) updateWithMoveForWindow:(SIO2window *)_SIO2window;
- (void) updateWithAccelerometer:(SIO2window *)_SIO2window;

- (BOOL) areToolsInMenuEnabled;

@end