#include <glib.h>
#include <stdlib.h>
#include "config.h"
#ifdef HAVE_API_WIN32_BASE
#include <windows.h>
#endif
#ifndef _MSC_VER
#include <sys/time.h>
#endif /* _MSC_VER */
#include "color.h"
#include "coord.h"
#include "point.h"
#include "callback.h"
#include "graphics.h"
#include "debug.h"
#include "navit.h"
#include "types.h"
#include "navit_nls.h"
#include "event.h"
#include "search.h"
#include "country.h"
#include "track.h"
#include "gui_internal.h"
#include "gui_internal_widget.h"
#include "gui_internal_priv.h"
#include "gui_internal_html.h"
#include "gui_internal_menu.h"
#include "gui_internal_gesture.h"

void
gui_internal_gesture_ring_clear(struct gui_priv *this)
{
	this->gesture_ring_last=this->gesture_ring_first=0;
};

static struct gesture_elem *
gui_internal_gesture_ring_get(struct gui_priv *this, int i)
{
	int n=(this->gesture_ring_last-i+GESTURE_RINGSIZE)%GESTURE_RINGSIZE;
	if(n==this->gesture_ring_first)
		return NULL;
	return this->gesture_ring+n;
};

void
gui_internal_gesture_ring_add(struct gui_priv *this, struct point *p)
{
	long long msec;
#ifndef HAVE_API_WIN32_CE
	struct timeval tv;
	gettimeofday(&tv,NULL);
	msec=((long long)tv.tv_sec)*1000+tv.tv_usec/1000;
#else
	msec=GetTickCount();
#endif
	this->gesture_ring_last++;
	this->gesture_ring_last%=GESTURE_RINGSIZE;
	if(this->gesture_ring_last==this->gesture_ring_first) {
		this->gesture_ring_first++;
		this->gesture_ring_first%=GESTURE_RINGSIZE;
   	}
	this->gesture_ring[this->gesture_ring_last].p=*p;
	this->gesture_ring[this->gesture_ring_last].msec=msec;
	dbg(lvl_info,"msec="LONGLONG_FMT" x=%d y=%d\n",msec,p->x,p->y);
};

int
gui_internal_gesture_get_vector(struct gui_priv *this, long long msec, struct point *p0, int *dx, int *dy)
{
	struct gesture_elem *g;
	int x,y,dt;
	int i;

	dt=0;

	if(dx) *dx=0;
	if(dy) *dy=0;
	if(p0) {
		p0->x=-1;
		p0->y=-1;
	}

	g=gui_internal_gesture_ring_get(this,0);
	if(!g)
		return 0;
	x=g->p.x;
	y=g->p.y;
	if(p0) {
		*p0=g->p;
	}
	msec=g->msec;
	dbg(lvl_info,LONGLONG_FMT" %d %d\n",g->msec, g->p.x, g->p.y);
	for(i=1;(g=gui_internal_gesture_ring_get(this,i))!=NULL;i++) {
		if( msec-g->msec > 1000 )
			break;
		dt=msec-g->msec;
		if(dx) *dx=x-g->p.x;
		if(dy) *dy=y-g->p.y;
		if(p0) {
			*p0=g->p;
		}
		dbg(lvl_info,LONGLONG_FMT" %d %d\n",g->msec, g->p.x, g->p.y);
	}
	return dt;
}

int
gui_internal_gesture_do(struct gui_priv *this)
{
	int dt;
	int dx,dy;
	
	dt=gui_internal_gesture_get_vector(this, 1000, NULL, &dx, &dy);

	if( abs(dx) > this->icon_s*3 && abs(dy) < this->icon_s ) {
		struct widget *wt;
		dbg(lvl_debug,"horizontal dx=%d dy=%d\n",dx,dy);

		/* Prevent swiping if widget was scrolled beforehand */
		if(this->pressed==2)
			return 0;

		for(wt=this->highlighted;wt && wt->type!=widget_table;wt=wt->parent);
		if(!wt || wt->type!=widget_table || !wt->data)
			return 0;
		if(this->highlighted) {
			this->highlighted->state &= ~STATE_HIGHLIGHTED;
			this->highlighted=NULL;
		}
		if(dx<0)
			gui_internal_table_button_next(this,NULL,wt);
		else
			gui_internal_table_button_prev(this,NULL,wt);
		return 1;
	} else if( abs(dy) > this->icon_s*3 && abs(dx) < this->icon_s ) {
		dbg(lvl_debug,"vertical dx=%d dy=%d\n",dx,dy);
	} else if (dt>300 && abs(dx) <this->icon_s && abs(dy) <this->icon_s ) {
		dbg(lvl_debug,"longtap dx=%d dy=%d\n",dx,dy);
	} else {
		dbg(lvl_debug,"none dx=%d dy=%d\n",dx,dy);
	}
	
	return 0;

};