/*
 *		INTERPOLATOR 2070
 *
 *	+---------------------------------------+
 *	! Do not use that software in real life !
 *	+---------------------------------------+
 *
 *	imported in FloatImg Mon Nov  9 19:08:57 CET 2020
 *
 */
#include  <stdio.h>
#include  <string.h>
#include  <stdlib.h>
#include  <unistd.h>
#include  <glob.h>

#include  "../floatimg.h"

#include  "fonctions.h"
#include  "glitches.h"
#include  "crapulator.h"
#include  "metriques.h"
#include  "filterstack.h"

int		verbosity;

/* -------------------------------------------------------------- */
/*  on va essayer de trier l'ordre d'apparition des images
 *  selon une metrique approximative
 */
typedef struct {
	int		idx;		/* in globbuf.gl_pathv[n] */
	float		value;		/* from metric analyse     */
	} IdxValue;

static int	negative = 0;

static int cmp_idxvalues(const void *pa, const void *pb)
{
if (negative)
	return ( ((IdxValue *)pa)->value < ((IdxValue *)pb)->value);
else
	return ( ((IdxValue *)pa)->value > ((IdxValue *)pb)->value);
}

int tentative_triage(glob_t *ptr_glob, IdxValue **ptr_idxval,
		int method, double *p_average)
{
int		idx, foo, nombre;
float		metrique;
double		average;
char		*filename;
IdxValue	*idxvalues;

#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, ptr_glob,
				ptr_idxval, method);
#endif

nombre = ptr_glob->gl_pathc;

/* allocate the array for the sorting action */
idxvalues = calloc(nombre, sizeof(IdxValue));
if (NULL==idxvalues) {
	fprintf(stderr, "MEMORY ERROR in %s\n", __func__);
	exit(1);
	}
fprintf(stderr, "IdxValues array at %p\n", idxvalues);

*ptr_idxval = idxvalues;
average     = 0.0;

/* compute all the needed values */
for (idx=0; idx<nombre; idx++) {
	filename = ptr_glob->gl_pathv[idx];
	foo = get_float_metric_from_file(filename, &metrique, method);
	if (foo) {
		fprintf(stderr, "%s: err %d get metric of '%s'\n",
				__func__, foo,         filename);
		return -1;
		}
	if (verbosity)
		fprintf(stderr, "%5d   %s   %10.3f\r", 
					idx, filename, metrique);
	idxvalues[idx].idx = idx;
	idxvalues[idx].value = metrique;
	average += (double)metrique;
	}

if (method) {
	/* and now, we can massage all our datas */
	fprintf(stderr, "sorting method = %d ...\n", method);
	qsort(idxvalues, nombre, sizeof(IdxValue), cmp_idxvalues);
	}

if (verbosity > 1) {
	for (idx=0; idx<nombre; idx++) {
		printf("%5d   %9.3f  %5d\n", idx,
				idxvalues[idx].value, idxvalues[idx].idx);
		fflush(stdout);
		}
	}
average /= (double)nombre;
*p_average = average;

fprintf(stderr, "\naverage %f\n", average);

return 0;
}

/* -------------------------------------------------------------- */
/*
 *		This is the mega working loop
 */
int interpolator(char *pattern, char *outdir, int Nsteps,
				int infx, int outfx, int sort)
{
FloatImg	A, B, Out, *pFirst, *pSecond;
glob_t		globbuf;
int		foo, idx, ipng, w, h, step;
int		curpix;
int		iarray[3];
char		*cptr, line[200];
float		coef, value;
double		meanmetric;
IdxValue	*idx_values;			/* gni? */

fprintf(stderr, "  interpolate from '%s' to '%s' with %d steps.\n",
			pattern, outdir, Nsteps);

if (negative) fprintf(stderr, "%s: negative ON\n", __func__);

memset(&globbuf, 0, sizeof(glob_t));
foo = glob(pattern, 0, NULL, &globbuf);
fprintf(stderr, "globbing '%s' -> %d, %d files found\n",
			pattern, foo, (int)globbuf.gl_pathc);
if (0 == globbuf.gl_pathc) {
	fprintf(stderr, "%s : no file found, aborting\n", __func__);
	return -1;
	}

idx_values = NULL;
foo = tentative_triage(&globbuf, &idx_values, sort, &meanmetric);
if (foo) {
	fprintf(stderr, "sort of %p -> %d\n\n", idx_values, foo);
	return foo;
	}

foo = fimg_fileinfos(globbuf.gl_pathv[0], iarray);
if (FIMG_TYPE_RGB != iarray[2]) {
	fprintf(stderr, "can work only on RGB fimg picture, was %d\n",
							iarray[2]);	
	exit(1);	/* BLAM! */
	}

w = iarray[0], h = iarray[1];
fprintf(stderr, "first image size : %dx%d\n", w, h);

fimg_create(&A,   w, h, 3);	pFirst  = &A;
fimg_vdeg_a(&A, idx_values[0].value);

fimg_create(&B,   w, h, 3);	pSecond = &B;
fimg_create(&Out, w, h, 3);

ipng = 0;
for (idx=0; idx<globbuf.gl_pathc; idx++) {

	curpix = idx_values[idx].idx;

	cptr = globbuf.gl_pathv[curpix];	/* aliasing filename */

	/* read the next file in B */
	fprintf(stderr, "%5d / %5d    %s\r", idx,
				(int)globbuf.gl_pathc, cptr);
	foo = fimg_load_from_dump(cptr, &B);
	if (foo) {
		fprintf(stderr, "load %s from dump -> %d\n", cptr, foo);
		continue;
		}
	value = idx_values[idx].value;

	/* here was the input filter */
	foo = filterstack_run(0, &B, 0);
	if (foo) {
		fprintf(stderr, "%s: input fx fail %d\n", __func__, foo);
		exit(1);
		}

	for (step=0; step<Nsteps; step++) {
		coef = (float)step / (float)Nsteps;
		fimg_interpolate(pSecond, pFirst, &Out, coef);

		foo = filterstack_run(1, &Out, 0);
		if (foo) {
			fprintf(stderr, "run filt stack--> %d\n", foo);
			return foo;
			}

		sprintf(line, "%s/%05d.png", outdir, ipng);
		foo = fimg_save_as_png(&Out, line, 0);
		if (foo) {
			fprintf(stderr, "err saving %s\n", line);
			return -8;
			}
		ipng++;
		}

#if 1
	/* temporary hack : move datas */
	fimg_copy_data(&B, &A);
#else
	/* swap pointers to the two picz */
	pTmp = pSecond;
	pSecond = pFirst;
	pFirst = pTmp;
	/* XXX THIS CODE DON'T WORK !!! */
#endif

	}

fprintf(stderr, "\ngenerated %d png files\n", ipng);

return 0;
}
/* -------------------------------------------------------------- */
void help(void)
{
puts("\tINTERPOLATOR");
puts("usage:\n\tinterpolator [options] <inglob> <outdir> <nbsteep>");

/*	may be we can make options incoherent, like 
 *	the options of 'fonderie' software ?
 */
puts("options:");
puts("\t-E i:bla:k\tinput  filter chain");
puts("\t-F name:j\toutput filter chain");
puts("\t-n\t\tmake negative");
puts("\t-S nn\t\tmysterious sort");
puts("\t-L\t\tlist available filters");
puts("\t-v\t\tincrease verbosity");

if (verbosity) {
	list_crapulors("available filters");
	}

exit(0);
}
/* -------------------------------------------------------------- */
int main (int argc, char *argv[])
{
int		foo;
int		nbrsteps = 9;
int		opt;
// int		inFx = 0;
// int		outFx = 0;
int		sort = 0;
char		*InFchain  = "0";
char		*OutFchain = "0";

fprintf(stderr, "*** %s : compiled by tTh, %s %s\n", __FILE__,
			__DATE__, __TIME__);
fimg_print_version(2);

#if DEBUG_LEVEL
/* this is for the debug off calling shellscript */
for (foo=0; foo<argc; foo++)
	fprintf(stderr, "%5d     %s\n", foo, argv[foo]);
#endif

while ((opt = getopt(argc, argv, "E:F:hLnS:v")) != -1) {
	switch(opt) {
		case 'E':	InFchain = optarg;	break;
		case 'F':	OutFchain = optarg;	break;
		case 'h':	help();			break;
		case 'L':
			list_crapulors("available filters");
			exit(0);
		case 'S':	sort = atoi(optarg);	break;
		case 'v':	verbosity++;		break;
		case 'n':	negative = 1;		break;
		}
	}

#if DEBUG_LEVEL
fprintf(stderr, "%s: argc = %d, optind = %d\n", argv[0], argc, optind);
#endif

if (3 != (argc-optind)) {
	fprintf(stderr, "args: [options] <inglob> <outdir> <nbsteep>\n");
	exit(1);
	}

foo = parse_filter_chain(0, InFchain);
if (foo) {
	fprintf(stderr, "err %d parsing '%s'\n", foo, InFchain);
	exit(1);
	}
foo = parse_filter_chain(1, OutFchain);
if (foo) {
	fprintf(stderr, "err %d parsing '%s'\n", foo, OutFchain);
	exit(1);
	}

if (verbosity > 1) {
	puts("=========================");
	filterstack_list(0, __FILE__);
	filterstack_list(1, __FILE__);
	puts("=========================");
	}

nbrsteps = atoi(argv[optind+2]);
foo = interpolator(argv[optind], argv[optind+1], nbrsteps,
					0, 0, sort);

fprintf(stderr, "interpolator give us a %d score\n", foo);

return 0;
}
/* -------------------------------------------------------------- */