/*
 *	Ivypointer
 *
 *	Copyright (C) 2007
 *	DGAC / DSNA / DTI / R&D
 *
 * 	Main and only file
 *
 *	Authors: Benjamin Tissoires <tissoire@cena.fr>
 *
 *	Please refer to file version.h for the
 *	copyright notice regarding this software
 */

//#define _MPX_

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#if X_DISPLAY_MISSING
#	error X11 is required to build xtest
#else
#	include <X11/Xlib.h>
#	include <X11/X.h>
#	include <X11/Xutil.h>
//#	include<X11/extensions/XInput.h>
//#	include<X11/extensions/shape.h>
#	define XK_MISCELLANY
#	define XK_XKB_KEYS
#	include <X11/keysymdef.h>
#   ifndef  IsXExtensionKeyboard
# 		define IsXExtensionKeyboard 3
#	endif
#   ifndef  IsXExtensionPointer
# 		define IsXExtensionPointer 4
#	endif
#	if HAVE_X11_EXTENSIONS_XTEST_H
#		include <X11/extensions/XTest.h>
#	else
#		error The XTest extension is required to build xtest
#	endif
#	if HAVE_X11_EXTENSIONS_XINERAMA_H
		// Xinerama.h may lack extern "C" for inclusion by C++
		extern "C" {
#		include <X11/extensions/Xinerama.h>
		}
#	endif
#	if HAVE_XKB_EXTENSION
#		include <X11/XKBlib.h>
#	endif
#endif

#include <Ivy/ivyloop.h>
#include <Ivy/ivy.h>
#include <Ivy/version.h>


#include "getopt.h"

#define REGEXP_CHANGE_GEOMETRY_SCREEN "^screen_geometry_event device_id=%s x0=(.*) y0=(.*) x1=(.*) y1=(.*)"
#define REGEXP_LOCK_UNLOCK "^lock_event device_id=%s status=(lock|unlock)"

#define REGEXP_MOVE "^TelepointerMotion Id=%s X=(.*) Y=(.*)"
#define REGEXP_DRAG "^TelepointerDrag Id=%s X=(.*) Y=(.*)"
#define REGEXP_REL_MOVE "^TelepointerRelativeMotion Id=%s X=(.*) Y=(.*)"
#define REGEXP_BUTTON "^TelepointerButton Id=%s Button=(.*) status=(.*)"

#define CHAMP_X_TELEPOINTEUR 1
#define CHAMP_Y_TELEPOINTEUR 2

#define REGEXP_POINTER "^pointer_event device_id=%s x=(.*) y=(.*) presure=(.*) tilt_x=(.*) tilt_y=(.*) wheel=(.*) predicted_x=(.*) predicted_y=(.*) type=(.*) serial_number=(.*) time=(.*) hires_x=(.*) hires_y=(.*) proximity=(.*)"
#define REGEXP_PAD "^pad_event device_id=%s button=(.*) status=(.*) time=(.*)"
#define REGEXP_SLIDER "^slider_event device_id=%s value=(.*) side=(.*) time=(.*)"
#define REGEXP_BUTTON_WACOM "^button_event device_id=%s button=(.*) status=(.*) x=(.*) y=(.*) presure=(.*) tilt_x=(.*) tilt_y=(.*) wheel=(.*) predicted_x=(.*) predicted_y=(.*) type=(.*) serial_number=(.*) time=(.*) hires_x=(.*) hires_y=(.*) proximity=(.*)"

#define CHAMP_X_WACOM 12
#define CHAMP_Y_WACOM 13

#define CHAMP_X_WACOM_BUTTON 14
#define CHAMP_Y_WACOM_BUTTON 15

#define CHAMP_X_WACOM_PREDICTIVE 7
#define CHAMP_Y_WACOM_PREDICTIVE 8

#define CHAMP_X_WACOM_PREDICTIVE_BUTTON 9
#define CHAMP_Y_WACOM_PREDICTIVE_BUTTON 10

#define TIME_CLICK 200
#define TIME_BETWEEN_CLICK 200


static void printHelpMsg(const char *name);

static Display* display = NULL;
#ifdef _MPX_
static XDevice* dev = NULL;
//#else
//# error plop
#endif
static float width,height;
static float coords_input[4] = {0.0,0.0,100.0,100.0};
static float width_input,height_input, offsetx, offsety;
static float horiz_ratio; // width / width_input
static float vert_ratio; // height / height_input

static int dragged = 0;
static int relative = 0;
static int switch_mode = 0;

static int locked = 0;

static int predictive_mode = 0;

static int champX;
static int champY;
static int champXButton;
static int champYButton;

static float old_x = 0;
static float old_y = 0;

static int device_input_id_given = 0;

static Display*
openDisplay(const char* displayName)
{
	// get the DISPLAY
	if (displayName == NULL) {
		displayName = getenv("DISPLAY");
		if (displayName == NULL) {
			displayName = ":0.0";
		}
	}

	// open the display
	printf("XOpenDisplay(\"%s\")\n", displayName);
	display = XOpenDisplay(displayName);
	if (display == NULL) {
	    printf("EE : can't open display \"%s\"\n", displayName);
	    return NULL;
//		throw XScreenUnavailable(60.0);
	}

	// verify the availability of the XTest extension
    int majorOpcode, firstEvent, firstError;
	if (!XQueryExtension(display, XTestExtensionName,
						&majorOpcode, &firstEvent, &firstError)) {
		printf("XTEST extension not available");
		XCloseDisplay(display);
	    return NULL;
	}
	XTestGrabControl(display, True);
#if HAVE_XKB_EXTENSION
	{
		m_xkb = false;
		int major = XkbMajorVersion, minor = XkbMinorVersion;
		if (XkbLibraryVersion(&major, &minor)) {
			int opcode, firstError;
			if (XkbQueryExtension(display, &opcode, &m_xkbEventBase,
								&firstError, &major, &minor)) {
				m_xkb = true;
				XkbSelectEvents(display, XkbUseCoreKbd,
								XkbMapNotifyMask, XkbMapNotifyMask);
				XkbSelectEventDetails(display, XkbUseCoreKbd,
								XkbStateNotifyMask,
								XkbGroupStateMask, XkbGroupStateMask);
			}
		}
	}
#endif

	return display;
}

#ifdef _MPX_
static XDevice *openDevice(Display * dpy, int id){
	return XOpenDevice(dpy, id);
}
#endif

// --------------------------------------------------------------------------
// tools
// --------------------------------------------------------------------------

static int valid(float x, float y) {
	return !locked && x>=coords_input[0] && x<=coords_input[2] && y>=coords_input[1] && y<=coords_input[3];
}

// --------------------------------------------------------------------------
// X11 functions
// --------------------------------------------------------------------------

static void
fakeMouseButton(const unsigned int xButton, Bool press, int x, int y)
{
	if (xButton != 0) {
#ifndef _MPX_
		XTestFakeButtonEvent(display, xButton, press ? True : False, CurrentTime);
#else
		int axes[2] = {x,y};
		XTestFakeDeviceButtonEvent(display, dev, xButton, press ? True : False, axes, 2, CurrentTime);
#endif
		XFlush(display);
	}
}

static void
fakeMouseMove(int x, int y)
{
//	printf("x = %d,y = %d;\n ",x,y);
#ifndef _MPX_
    XTestFakeMotionEvent(display, DefaultScreen(display), x, y, CurrentTime);
#else
    int axes[2] = {x,y};
    XTestFakeDeviceMotionEvent(display, dev, False, 0, axes, 2, CurrentTime);
#endif
	//XWarpPointer(display, None, RootWindow(display, 0), 0, 0, 0, 0, x, y);
	XFlush(display);
}

static void
fakeMouseRelativeMove(int dx, int dy)
{
#ifndef _MPX_
    XTestFakeRelativeMotionEvent(display, dx, dy, CurrentTime);
#else
    int axes[2] = {dx,dy};
    XTestFakeDeviceMotionEvent(display, dev, True, 0, axes, 2, CurrentTime);
#endif
	//XWarpPointer(display, None, None, 0, 0, 0, 0, dx, dy);
	XFlush(display);
}

// --------------------------------------------------------------------------
// Geometry callback
// --------------------------------------------------------------------------

static void CallbackScreen(IvyClientPtr app, void *user_data, int argc, char *argv[]) {
//    char *id = argv[0];
    float x0 = atof(argv[1-device_input_id_given]);
    float y0 = atof(argv[2-device_input_id_given]);
    float x1 = atof(argv[3-device_input_id_given]);
    float y1 = atof(argv[4-device_input_id_given]);
    if (x1 > x0 && y1 > y0 ){
        offsetx = x0;
        offsety = y0;
        width = x1-x0;
        height = y1-y0;
		horiz_ratio = width / width_input;
		vert_ratio = height / height_input;
        printf("screen : %f+%f x %f+%f\n",offsetx,width,offsety,height);
    } else {
        printf("bad coords received : %.2f,%.2f %.2f,%.2f\n",x0,y0,x1,y1);
    }
}

// --------------------------------------------------------------------------
// Lock/Unlock callback
// --------------------------------------------------------------------------

static void CallbackLockUnlock(IvyClientPtr app, void *user_data, int argc, char *argv[]) {
    locked = strcmp(argv[1-device_input_id_given],"unlock");
}

// --------------------------------------------------------------------------
// Telepointer callbacks
// --------------------------------------------------------------------------

static void CallbackMove (IvyClientPtr app, void *user_data, int argc, char *argv[]) {
//    printf ("%s sent (size : %d)",IvyGetApplicationName(app),argc);
//    for  (i = 0; i < argc; i++)
//			printf(" '%s'",argv[i]);
    float x = atof(argv[champX]);
    float y = atof(argv[champY]);
    if (!valid(x,y)){
		// ignore outside events
		return;
	}
    x = offsetx + x * horiz_ratio;
    y = offsety + y * vert_ratio;
//    printf("x = %f,y = %f\n",x,y);
	old_x = x;
	old_y = y;
	fakeMouseMove((int)x,(int)y);
	if (dragged){
		fakeMouseButton(1,0,x,y);
		dragged = 0;
	}
}


static void CallbackDrag (IvyClientPtr app, void *user_data, int argc, char *argv[]) {
//    char *id = argv[0];
    float x = atof(argv[champX]);
    float y = atof(argv[champY]);
	if (!valid(x,y)){
		// ignore outside events
		return;
	}
    x = offsetx + x * horiz_ratio;
    y = offsety + y * vert_ratio;
//    printf("x = %f,y = %f\n",x,y);
	old_x = x;
	old_y = y;
	fakeMouseMove((int)x,(int)y);
	if (!dragged){
		fakeMouseButton(1,1,x,y);
		dragged = 1;
	}
}

static void CallbackRelMove (IvyClientPtr app, void *user_data, int argc, char *argv[]) {
//    char *id = argv[0];
    float dx = atof(argv[1-device_input_id_given]);
    float dy = atof(argv[2-device_input_id_given]);
    fakeMouseRelativeMove((int)dx,(int)dy);
}

static void CallbackButton (IvyClientPtr app, void *user_data, int argc, char *argv[]) {
//    char *id = argv[0];
    int b = atoi(argv[1-device_input_id_given]);
    int press = atoi(argv[2-device_input_id_given]);
	if (!valid(old_x,old_y)){
		// ignore outside events
		return;
	}
    fakeMouseButton(b,press,0,0);
}

// --------------------------------------------------------------------------
// Wacom callbacks
// --------------------------------------------------------------------------

static void CallbackPointer (IvyClientPtr app, void *user_data, int argc, char *argv[]) {
	//    char *id = argv[0];
	float x = atof(argv[champX]); // predicted position
	float y = atof(argv[champY]); // predicted position
	int time = atoi(argv[11-device_input_id_given]);
	int presure = atoi(argv[3-device_input_id_given]);
	static int old_time = 0;
	static int should_click = 0;
	static int clicked = 0;
	if (!valid(x,y)){
		// ignore outside events
		return;
	}

	if (!predictive_mode) {
		// in predictive mode, we don't allow the geometry to be changed
		x = offsetx + x * horiz_ratio;
		y = offsety + y * vert_ratio;
	}
	
	if (!relative) {
		//absolute mode
		fakeMouseMove((int)x,(int)y);
	} else {
		//relative mode
		int dx = (int)(x-old_x);
		int dy = (int)(y-old_y);
		int dt = time-old_time;
//	    if (old_time)
//        	printf("time=%d, old_time=%d, dt=%d\n",time, old_time, dt);
		if (presure > 0) {
			if (!should_click){
				old_time = time;
				dt = 0;
				should_click = 1;
//			    printf("armement du timeout\n");
			} else {
				if (should_click ==1 && dt > TIME_CLICK){
					should_click = 2;
//					printf("timeout\n");
				}
			}
			fakeMouseRelativeMove(dx,dy);
		} else {
			if (should_click == 1) {
//				printf("dt = %d\n",dt);
				if (clicked) {
					//double click
//					printf("ck\n");
					fakeMouseButton(1,0,x,y);
				}
//				printf("cli\n");
				clicked = 1;
				old_time = time;
				fakeMouseButton(1,1,x,y);
			}
			should_click = 0;
			if (clicked) {
				if (dt > TIME_BETWEEN_CLICK){
//					printf("ck\n");
					fakeMouseButton(1,0,x,y);
					clicked = 0;
				}
			} else {
				old_time = 0;
			}
		}
	}

	// release (common of both modes)
	if (dragged && presure==0){
		fakeMouseButton(1,0,x,y);
		dragged = 0;
	}

	old_x = x;
	old_y = y;
}

static void CallbackPad (IvyClientPtr app, void *user_data, int argc, char *argv[]) {
	if (!valid(old_x,old_y)){
		// ignore outside events
		return;
	}
    int b = atoi(argv[1-device_input_id_given]);
    int press = 0;
//    if (!b)
//        return
    if (strcmp(argv[2-device_input_id_given],"up")){
        press = 1;
    }
//    printf("Pad button=%d pressed%d event received\n",b, press);
    if (switch_mode && (b==11 || b==15 || (press && (b==12 || b==16)))){
        //inversion du mode
        relative = !relative;
    } else {
        fakeMouseButton(b,press,0,0);
    }
}

static void CallbackSlider (IvyClientPtr app, void *user_data, int argc, char *argv[]) {
    //TODO
//    char *id = argv[0];
//    int b = atoi(argv[1]);
//    int press = atoi(argv[2]);
//    if (!b)
//        return
//    fakeMouseButton(b,press);
}

static void CallbackButtonWacom (IvyClientPtr app, void *user_data, int argc, char *argv[]) {
//    char *id = argv[0];
    int b = atoi(argv[1-device_input_id_given]);
    if (b == 1 && relative) // gestion propre du bouton 1
        return;
    int press = strcmp(argv[2-device_input_id_given],"up");
	float x = atof(argv[champXButton]);
	float y = atof(argv[champYButton]);
	if (!valid(x,y)){
		// ignore outside events
		return;
	}
	
    fakeMouseButton(b,press,0,0);
}

static int extractValues(char optarg[], float* output, const char name[]){
	int i = 0;
	int j = 0;
	int last = 0;
	float coupures[4] = {0,0,0,0};

	while(optarg[i]){
		if (optarg[i] == ','){
			coupures[j] = i;
			j++;
			if (j > 3) {
				printHelpMsg(name);
				exit(1);
			}
		}
		i++;
	}
	coupures[j] = i;
	j = 0;
	last = 0;
    for (i=0; i< 4; i++){
	    int length = coupures[i]-last;
        char buf [1024] = "";
        int k;
        for (k = 0; k < length; k++) {
            buf[k] = optarg[last+k];
        }
        output[i] = atof(buf);
        last = coupures[i]+1;
    }
	return 1;
}

static void printHelpMsg(const char *name){
	const char* helpmsg =
	  "[options] [regexps]\n\t-b bus\t\tdefines the Ivy bus to which to connect to, defaults to 127:2010\n"
	  "\t-t\t\tuse data from ModeManager instead of xinput_wacom\n"
	  "\t-C x0,y0,x1,y1\tspecify the coords of the screen used\n"
	  "\t-d device\tuse \"device\" as the source of the events\n"
	  "\t-r\tuse relative mode by default\n"
	  "\t-s\tenable the ability to dynamically switch between relative and absolute\n"
	  "\t-p\tuse predictive mode (disable geometry)\n"
	  "\t-v\t\tprints the ivy relase number\n\n"
    ;
	printf("usage: %s %s",name,helpmsg);
}

// --------------------------------------------------------------------------
// Main
// --------------------------------------------------------------------------

int main(int argc, char *argv[]) {
	const char* bus = 0;
	char busbuf [1024] = "";
    char device_input_id [1024] = "(.*)";
    int wacom = 1;
    float user_coordsO = 0;
    float coordsO[4] = {0,0,0,0};
	int c;
	int id = -1;
	while ((c = getopt(argc, argv, "vb:td:C:rpi:sc:")) != EOF)
			switch (c) {
			case 'b':
				strcpy (busbuf, optarg);
				bus = busbuf;
				break;
			case 'v':
				printf("ivy c library version %d.%d\n",IVYMAJOR_VERSION,IVYMINOR_VERSION);
				break;
			case 'r':
				relative = 1;
				break;
			case 'd':
                strcpy (device_input_id, optarg);
                device_input_id_given = 1;
				break;
			case 't':
				wacom = 0;
				break;
			case 'p':
				predictive_mode = 1;
				break;
			case 'C':
				user_coordsO = extractValues(optarg, coordsO, argv[0]);
				break;
			case 'i':
				id = atoi(optarg);
				break;
			case 's':
				switch_mode = 1;
				break;
			case 'c':
				printf("option '-c' disapeared since 0.0.7\n");
				break;
			default:
				printf("bad option : %s\n",(char*)&c);
				printHelpMsg(argv[0]);
				exit(1);
			}
    Display* d = openDisplay(NULL);
    if (!d){
        return 1;
    }
#ifdef _MPX_
    if (id >=0){
    	printf("opening device id=%d\n",id);
    	dev = openDevice(d,id);
		if (!dev) {
			printf("unable to open device id=%d\n",id);
		}
    }
#endif
    
    if (!predictive_mode && user_coordsO){
    	offsetx = coordsO[0];
    	offsety = coordsO[1];
        width = coordsO[2]-coordsO[0];
        height = coordsO[3]-coordsO[1];
    } else {
    	offsetx = 0;
    	offsety = 0;
        width = DisplayWidth(d, DefaultScreen(d));
        height = DisplayHeight(d, DefaultScreen(d));
    }
	
    printf("screen : %.2f+%.2f x %.2f+%.2f\n",offsetx,width,offsety,height);
    
    // verifications
    if (width < 2 || height < 2 ){
    	printf("screen geometry : %.2f %.2f\n",width,height);
    	printHelpMsg(argv[0]);
    	exit(1);
    }
    
    if (wacom) {
		if (predictive_mode){
			coords_input[2] = width;
			coords_input[3] = height;
		} else {
			coords_input[2] = 1.0;
			coords_input[3] = 1.0;
		}
        //~ print_coords_input();
		if (!predictive_mode) {
			champX = CHAMP_X_WACOM;
			champY = CHAMP_Y_WACOM;
			champXButton = CHAMP_X_WACOM_BUTTON;
			champYButton = CHAMP_Y_WACOM_BUTTON;
		} else {
			champX = CHAMP_X_WACOM_PREDICTIVE;
			champY = CHAMP_Y_WACOM_PREDICTIVE;
			champXButton = CHAMP_X_WACOM_PREDICTIVE_BUTTON;
			champYButton = CHAMP_Y_WACOM_PREDICTIVE_BUTTON;
		}
    } else {
		champX = CHAMP_X_TELEPOINTEUR;
		champY = CHAMP_Y_TELEPOINTEUR;
	}
	
	champX -= device_input_id_given;
	champY -= device_input_id_given;
	champXButton -= device_input_id_given;
	champYButton -= device_input_id_given;
    
    width_input  = coords_input[2]-coords_input[0];
    height_input = coords_input[3]-coords_input[1];

	horiz_ratio = width / width_input;
	vert_ratio = height / height_input;
    
    MsgRcvPtr ptrMove,ptrRelMove,ptrButton,ptrGeometry,ptrLockUnlock;
    IvyInit("IvyPointer","IvyPointer Ready",NULL,NULL,NULL,NULL);
    
    char regexp[2048] = "";
    if (!wacom) {
    // telepointer callbacks

        sprintf(regexp, REGEXP_MOVE, device_input_id);
        ptrMove=IvyBindMsg(CallbackMove,&ptrMove,REGEXP_MOVE, device_input_id);
        printf("bound to %s\n",regexp);

        sprintf(regexp, REGEXP_DRAG, device_input_id);
        ptrMove=IvyBindMsg(CallbackDrag,&ptrMove, REGEXP_DRAG, device_input_id);
        printf("bound to %s\n",regexp);

        sprintf(regexp, REGEXP_REL_MOVE, device_input_id);
        ptrMove=IvyBindMsg(CallbackRelMove,&ptrRelMove, REGEXP_REL_MOVE, device_input_id);
        printf("bound to %s\n",regexp);

        sprintf(regexp, REGEXP_BUTTON, device_input_id);
        ptrMove=IvyBindMsg(CallbackButton,&ptrButton, REGEXP_BUTTON, device_input_id);
        printf("bound to %s\n",regexp);
    } else {
    //wacom callbacks
        sprintf(regexp, REGEXP_POINTER, device_input_id);
        ptrMove=IvyBindMsg(CallbackPointer,&ptrMove, REGEXP_POINTER, device_input_id);
        printf("bound to %s\n",regexp);

//       ptrMove=IvyBindMsg(CallbackSlider,&ptrMove,REGEXP_SLIDER);
//       printf("bound to %s\n",REGEXP_SLIDER);

        sprintf(regexp, REGEXP_PAD, device_input_id);
        ptrMove=IvyBindMsg(CallbackPad,&ptrButton, REGEXP_PAD, device_input_id);
        printf("bound to %s\n",regexp);

        sprintf(regexp, REGEXP_BUTTON_WACOM, device_input_id);
        ptrMove=IvyBindMsg(CallbackButtonWacom,&ptrButton, REGEXP_BUTTON_WACOM, device_input_id);
        printf("bound to %s\n",regexp);
    }

	if (!predictive_mode) {
		sprintf(regexp, REGEXP_CHANGE_GEOMETRY_SCREEN, device_input_id);
		ptrGeometry=IvyBindMsg(CallbackScreen,&ptrGeometry, REGEXP_CHANGE_GEOMETRY_SCREEN, device_input_id);
		printf("bound to %s\n",regexp);
	}

	sprintf(regexp, REGEXP_LOCK_UNLOCK, device_input_id);
	ptrLockUnlock=IvyBindMsg(CallbackLockUnlock,&ptrLockUnlock, REGEXP_LOCK_UNLOCK, device_input_id);
	printf("bound to %s\n",regexp);
	
    IvyStart(bus);
#if (IVYMAJOR_VERSION == 3) && (IVYMINOR_VERSION < 9)
    IvyMainLoop(NULL, NULL);
#else
    IvyMainLoop();
#endif
  return 0;
}