#include <stdio.h>
#include <string.h>
#include "util.h"

static int viewwidth=1900;
static int viewheight=1000;
static int imagewidth=100;
static int imageheight=100;
static const char *titleimg = NULL;
static const char *titlecolor = "black";

void util_format_title (
	const char *title)
{
	int titlesize = 7+2;
	if (viewwidth < 1900){
		titlesize = 5+2;
	}
	if (titleimg != NULL){
		int height = util_get_titleheight();
		printf ("<table border=0><tr><td width=%d height=%d background=%s:%dx%d align=bottom>\n"
			,viewwidth,height,titleimg,viewwidth,height);
		printf ("<font size=%d color=%s>&nbsp;&nbsp;&nbsp;%s</font>\n"
				,titlesize,titlecolor,title);
		printf ("</td></table>\n");
	}else{
		printf ("<font size=%d color=%s>&nbsp;&nbsp;&nbsp;%s</font>\n"
			,titlesize,titlecolor,title);
	}
}
int util_get_viewwidth()
{
	return viewwidth;
}
int util_get_viewheight()
{
	return viewheight;
}
int util_get_imagewidth()
{
	return imagewidth;
}
int util_get_imageheight()
{
	return imageheight;
}
const char *util_get_titleimg()
{
	return titleimg;
}

/*
	Return the required title-image height when the constraint is the viewwidth
*/
int util_get_titleheight()
{
	return((double)viewwidth/imagewidth)*imageheight;
}
/*
	Return the required title-image width when the constraint is the viewheight
*/
int util_get_titlewidth()
{
	return((double)viewheight/imageheight)*imagewidth;
}

static const char *prevpage = "none";
static const char *nextpage = "none";
static int highlit = -1;
#define NBSHOW_MAX 100
#define NBSHOW_LAST 99		// This tells we want to show the last step, without knowing what it is
static int nbshow = NBSHOW_MAX;
static bool showtitle = false;
static bool showcomments = false;

/*
	Record the number of steps in the current slide
*/
void navigation_setsteps(int nbsteps)
{
	if (highlit == NBSHOW_LAST) highlit = nbsteps;
	if (nbshow == NBSHOW_LAST) nbshow = nbsteps;
}
int navigation_getnbshow()
{
	return nbshow;
}
int navigation_gethighlit()
{
	return highlit;
}

bool navigation_getshowtitle()
{
	return showtitle;
}
bool navigation_getcomments()
{
	return showcomments;
}

void presentation_setarg(_F_tlmpprogram___v2 *c)
{
	c->setgrouparg ("Presentation");
	c->setarg (' ',"viewwidth","View width",viewwidth,false);
	c->setarg (' ',"viewheight","View height",viewheight,false);
	c->setarg (' ',"titleimg","Title background image",titleimg,false);
	c->setarg (' ',"titlecolor","Title font color",titlecolor,false);
	c->setarg (' ',"imagewidth","Title image width",imagewidth,false);
	c->setarg (' ',"imageheight","Title image height",imageheight,false);
}

void navigation_setarg(_F_tlmpprogram___v2 *c)
{
	c->setgrouparg ("Navigation");
	c->setarg ('h',"highlit","Which item to highlit (1,2,...)",highlit,false);
	c->setarg ('s',"show","how many items to show",nbshow,false);
	c->setarg (' ',"prev","Previous page",prevpage,false);
	c->setarg (' ',"next","Next page",nextpage,false);
	c->setarg (' ',"showtitle","Print the title of the page",showtitle,false);
	c->setarg (' ',"showcomments","Print the comments of the page",showcomments,false);
}


void navigation_print (const char *currpage, int nbsteps)
{
	debug_printf ("naviprint currpage=%s nbsteps=%d nbshow=%d\n",currpage,nbsteps,nbshow);
	
	int currstep = highlit;
	if (currstep == -1) currstep = nbshow;
	if (currstep > nbsteps) currstep = nbsteps;
	printf ("<script type=\"text/javascript\">\n");
	const char *pt = strrchr(currpage,'/');
	if (pt != NULL) currpage = pt+1;
	printf ("\tcurrpage=\"%s\";\n",currpage);
	if (currstep == 1){
		if (strcmp(prevpage,"none")==0){
			printf ("\tprevstep=\"none\";\n");
		}else{
			printf ("\tprevstep=\"%s_%d\";\n",prevpage,NBSHOW_MAX);
		}
	}else{
		printf ("\tprevstep=\"%s_%d\";\n",currpage,currstep-1);
	}
	if (currstep < nbsteps){
		printf ("\tnextstep=\"%s_%d\";\n",currpage,currstep+1);
	}else{
		if (strcmp(nextpage,"none")==0){
			printf ("\tnextstep=\"none\";\n");
		}else{
			printf ("\tnextstep=\"%s_%d\";\n",nextpage,1);
		}
	}
	printf ("\tprevpage=\"%s\";\n",prevpage);
	printf ("\tnextpage=\"%s\";\n",nextpage);

	printf ("</script>\n");
}