/*------------------------------------------------------------------
 * Glue for libpsyc.
 *------------------------------------------------------------------
 * func_spec for this:
 *
    mixed   psyc_parse(int* | string);
    string  psyc_render(mapping, mapping, string, int* | string);
 *
 *------------------------------------------------------------------
 * test LPC code:

	// doesn't work with (int *) yet
	mixed x = psyc_parse(":_context\ttest\n\n:_topic\ttesting\n_notice_test_libpsyc\nJust [_topic] libpsyc.\n|\n");
	mixed y = psyc_render(([ "_context": "test" ]), ([ "_topic": "testing" ]), "_notice_test_libpsyc", "Just [_topic] libpsyc.");
	debug_message(sprintf("libpsyc returned %O and %O\n", x, y));

 */

#include "array.h"
#include "interpret.h"
#include "mapping.h"
#include "mstrings.h"
#include "simulate.h"
#include "xalloc.h"

#include <psyc.h>
#include <psyc/parser.h>

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

#ifdef USE_PSYC

/*-------------------------------------------------------------------------*/
//  string  psyc_render(mapping, mapping, string, int* | string);

svalue_t *
f_psyc_render(svalue_t *sp) {

    free_svalue(sp--);
    free_svalue(sp--);
    free_svalue(sp--);
    free_svalue(sp--);
/*
    printf("rendering... not yet\n");
    string_t *out;
    memsafe(
	// out = alloc_mstring(5), 5,
	out = new_mstring("PSYC"), 5,
	"f_psyc_render test");
    put_string(sp, out);
*/
    put_c_string(++sp, "PSYC");
    return sp;

} /* f_psyc_render */

/*-------------------------------------------------------------------------*/
//  mixed   psyc_parse(int* | string);

svalue_t *
f_psyc_parse (svalue_t *sp) {
    string_t *str = NULL;
    vector_t *v;
    mapping_t *map;
    svalue_t *sv;
    mp_int i;
    psycString name, value, elem;
    psycParseState state;
    psycParseListState listState;
    char oper;
    int ret;

    psyc_initParseState(&state);
    i = 0;
    if (sp->type == T_POINTER) {
	if ((i = (mp_int)VEC_SIZE(sp->u.vec)) > 32) {
	    errorf("Bad arg 1 to psyc_parse(): int[] too long (%"PRIdMPINT")\n"
	     , i);
	    /* NOTREACHED */
	    return sp;
	}
	printf("\npsyc_parse got %ld int* bytes... not supported yet\n", i);
    }
    else if (sp->type == T_STRING) {
	printf("\npsyc_parse got a %d bytes long string...\n", mstrsize(sp->u.str));
	psyc_nextParseBuffer(&state, psyc_newString(get_txt(sp->u.str),
						    mstrsize(sp->u.str)));
    }

    v = allocate_array(4);
    if (!v) errorf("Out of memory for psyc_parse array.\n");
    map = allocate_mapping( 0, 1 );	// empty mapping
    if (!map) errorf("Out of memory for psyc_parse routing header.\n");
    put_mapping(&v->item[0], map);
    map = allocate_mapping( 0, 1 );	// empty mapping
    if (!map) errorf("Out of memory for psyc_parse entity header.\n");
    put_mapping(&v->item[1], map);

    do {
	ret = psyc_parse(&state, &oper, &name, &value);
	switch (ret) {
	case PSYC_PARSE_ROUTING:
		if (oper != ':') {
			puts("_failure_unsupported_state");
			continue;
		}
		// not sure if the following code is good.. TODO
		sv = pxalloc( sizeof( svalue_t ) );
		put_string(sv, new_n_mstring(name.ptr, name.length));
		sv = get_map_lvalue(v->item[0].u.map, sv);
		put_string(sv, new_n_mstring(value.ptr, value.length));
		break;
	case PSYC_PARSE_ENTITY:
		if (oper != ':') {
			puts("_failure_unsupported_state");
			continue;
		}
		// not sure if the following code is good.. TODO
		sv = pxalloc( sizeof( svalue_t ) );
		put_string(sv, new_n_mstring(name.ptr, name.length));
		sv = get_map_lvalue(v->item[1].u.map, sv);
		put_string(sv, new_n_mstring(value.ptr, value.length));

		if (memcmp(name.ptr, "_list", 5) == 0)
		{
			write(1, ">>> LIST START\n", 15);
			psyc_initParseListState(&listState);
			psyc_nextParseListBuffer(&listState, value);
			while ((ret = psyc_parseList(&listState, &name, &value, &elem)))
			{
				switch (ret)
				{
					case PSYC_PARSE_LIST_END:
					case PSYC_PARSE_LIST_ELEM:
						write(1, "|", 1);
						write(1, elem.ptr, elem.length);
						write(1, "\n", 1);
						break;
					default:
						errorf("Error while parsing PSYC list: %i\n", ret);
						/* NOTREACHED */
						return sp;
				}

				if (ret == PSYC_PARSE_LIST_END)
				{
					write(1, ">>> LIST END\n", 13);
					break;
				}
			}
		}
		break;
	case PSYC_PARSE_BODY:
		if (str) errorf("Got two PSYC methods in the same packet!?\n");
		// not sure if new_n_mstring is the right thing here.. TODO
		str = new_n_mstring(name.ptr, name.length);
		// make_tabled gets the shared string for the method
		put_string(&v->item[2], make_tabled(str));

		// not sure if new_n_mstring is the right thing here.. TODO
		str = new_n_mstring(value.ptr, value.length);
		put_string(&v->item[3], str);

		break;
	case PSYC_PARSE_COMPLETE:
		ret = 0;
		break;
	case PSYC_PARSE_INSUFFICIENT:
		errorf("Insufficient PSYC data.\n");
		/* NOTREACHED */
		return sp;
	default:
		errorf("Error while parsing PSYC: %i\n", ret);
		/* NOTREACHED */
		return sp;
	}
    } while (ret);

    free_svalue(sp);
//  push_string(sp, str);
//  put_number(sp, 4404);	// push a test rc
    put_array(sp, v);
    return sp;

} /* f_psyc_parse */

#endif /* USE_PSYC */