/*
   WMI Sample client
   Copyright (C) 2006 Andrzej Hajda <andrzej.hajda@wp.pl>
   Copyright (C) 2008 Jelmer Vernooij <jelmer@samba.org>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"
#include "lib/cmdline/popt_common.h"
#include "librpc/rpc/dcerpc.h"
#include "librpc/gen_ndr/ndr_oxidresolver.h"
#include "librpc/gen_ndr/ndr_oxidresolver_c.h"
#include "librpc/gen_ndr/ndr_dcom.h"
#include "librpc/gen_ndr/ndr_dcom_c.h"
#include "librpc/gen_ndr/ndr_remact_c.h"
#include "librpc/gen_ndr/ndr_epmapper_c.h"
#include "librpc/gen_ndr/com_dcom.h"

#include "lib/com/dcom/dcom.h"
#include "lib/com/com.h"

#include "lib/wmi/wmi.h"

struct program_args {
	char *hostname;
	char *query;
	char *ns;
};

static void parse_args(int argc, char *argv[], struct program_args *pmyargs)
{
	poptContext pc;
	int opt, i;

	int argc_new;
	char **argv_new;

	struct poptOption long_options[] = {
		POPT_AUTOHELP
		POPT_COMMON_SAMBA
		POPT_COMMON_CONNECTION
		POPT_COMMON_CREDENTIALS
		POPT_COMMON_VERSION
		{"namespace", 0, POPT_ARG_STRING, &pmyargs->ns, 0,
		 "WMI namespace, default to root\\cimv2", 0},
		POPT_TABLEEND
	};

	pc = poptGetContext("wmi", argc, (const char **) argv,
		long_options, POPT_CONTEXT_KEEP_FIRST);

	poptSetOtherOptionHelp(pc, "//host query\n\nExample: wmic -U [domain/]adminuser%password //host \"select * from Win32_ComputerSystem\"");

	while ((opt = poptGetNextOpt(pc)) != -1) {
		poptPrintUsage(pc, stdout, 0);
		poptFreeContext(pc);
		exit(1);
	}

	argv_new = discard_const_p(char *, poptGetArgs(pc));

	argc_new = argc;
	for (i = 0; i < argc; i++) {
		if (argv_new[i] == NULL) {
			argc_new = i;
			break;
		}
	}

	if (argc_new != 3 || argv_new[1][0] != '/'
			|| argv_new[1][1] != '/') {
		poptPrintUsage(pc, stdout, 0);
		poptFreeContext(pc);
		exit(1);
	}

	pmyargs->hostname = argv_new[1] + 2;
	pmyargs->query = argv_new[2];
	poptFreeContext(pc);
}

static void escape_string(const char *src, char *dst, int len)
{
	char *p = dst, *end = dst + len - 1;
	const char *q = src;

	if ( q == NULL) {
		strncpy( dst, "(null)", len);
		return;
	}

	while ( *q && p <= end ) {
		if ( strchr( "|\\(),", *q)) {
			*p++ = '\\';
			*p++ = *q++;
		} else if ( *q == '\n' ) {
			*p++ = '\\';
			*p++ = 'n';
			q++;
		} else if ( *q == '\r' ) {
			*p++ = '\\';
			*p++ = 'r';
			q++;
		} else {
			*p++ = *q++;
		}
	}

	*p++ = 0;
}

#define WERR_CHECK(msg) if (!W_ERROR_IS_OK(result)) { \
			    DEBUG(0, ("ERROR: %s\n", msg)); \
			    goto error; \
			} else { \
			    DEBUG(1, ("OK   : %s\n", msg)); \
			}

#define RETURN_CVAR_ARRAY_STR_START(arr) {\
        uint32_t i;\
	char *r;\
\
        if (!arr) {\
                return talloc_strdup(mem_ctx, "(null)");\
        }\
	r = talloc_strdup(mem_ctx, "(");\
        for (i = 0; i < arr->count; ++i) {


#define RETURN_CVAR_ARRAY_STR_END(fmt, arr, item) \
		r = talloc_asprintf_append(r, fmt "%s", item, (i+1 == arr->count)?"":",");\
        }\
        return talloc_asprintf_append(r, ")");\
}

#define RETURN_CVAR_ARRAY_STR(fmt, arr) \
	RETURN_CVAR_ARRAY_STR_START(arr) \
	RETURN_CVAR_ARRAY_STR_END(fmt, arr, arr->item[i])

#define RETURN_CVAR_ARRAY_ESCAPED(fmt, arr) \
	RETURN_CVAR_ARRAY_STR_START(arr) \
	char buf[2048]; \
	escape_string( arr->item[i], buf, 2048); \
	RETURN_CVAR_ARRAY_STR_END(fmt, arr, buf)

char *string_CIMVAR(TALLOC_CTX *mem_ctx, union CIMVAR *v, enum CIMTYPE_ENUMERATION cimtype)
{
	switch (cimtype) {
	case CIM_SINT8: return talloc_asprintf(mem_ctx, "%d", v->v_sint8);
	case CIM_UINT8: return talloc_asprintf(mem_ctx, "%u", v->v_uint8);
	case CIM_SINT16: return talloc_asprintf(mem_ctx, "%d", v->v_sint16);
	case CIM_UINT16: return talloc_asprintf(mem_ctx, "%u", v->v_uint16);
	case CIM_SINT32: return talloc_asprintf(mem_ctx, "%d", v->v_sint32);
	case CIM_UINT32: return talloc_asprintf(mem_ctx, "%u", v->v_uint32);
	case CIM_SINT64: return talloc_asprintf(mem_ctx, "%lld", v->v_sint64);
	case CIM_UINT64: return talloc_asprintf(mem_ctx, "%llu", v->v_sint64);
	case CIM_REAL32: return talloc_asprintf(mem_ctx, "%f", (double)v->v_uint32);
	case CIM_REAL64: return talloc_asprintf(mem_ctx, "%f", (double)v->v_uint64);
	case CIM_BOOLEAN: return talloc_asprintf(mem_ctx, "%s", v->v_boolean?"True":"False");
	case CIM_STRING:
	case CIM_DATETIME:
	case CIM_REFERENCE: {
		char buf[2048];
		escape_string((char*) v-> v_string, buf, 2048);
		return talloc_asprintf(mem_ctx, "%s", buf);
	}
	case CIM_CHAR16: return talloc_asprintf(mem_ctx, "Unsupported");
	case CIM_OBJECT: return talloc_asprintf(mem_ctx, "Unsupported");
	case CIM_ARR_SINT8: RETURN_CVAR_ARRAY_STR("%d", v->a_sint8);
	case CIM_ARR_UINT8: RETURN_CVAR_ARRAY_STR("%u", v->a_uint8);
	case CIM_ARR_SINT16: RETURN_CVAR_ARRAY_STR("%d", v->a_sint16);
	case CIM_ARR_UINT16: RETURN_CVAR_ARRAY_STR("%u", v->a_uint16);
	case CIM_ARR_SINT32: RETURN_CVAR_ARRAY_STR("%d", v->a_sint32);
	case CIM_ARR_UINT32: RETURN_CVAR_ARRAY_STR("%u", v->a_uint32);
	case CIM_ARR_SINT64: RETURN_CVAR_ARRAY_STR("%lld", v->a_sint64);
	case CIM_ARR_UINT64: RETURN_CVAR_ARRAY_STR("%llu", v->a_uint64);
	case CIM_ARR_REAL32: RETURN_CVAR_ARRAY_STR("%f", v->a_real32);
	case CIM_ARR_REAL64: RETURN_CVAR_ARRAY_STR("%f", v->a_real64);
	case CIM_ARR_BOOLEAN: RETURN_CVAR_ARRAY_STR("%d", v->a_boolean);
	case CIM_ARR_STRING: RETURN_CVAR_ARRAY_ESCAPED("%s", v->a_string);
	case CIM_ARR_DATETIME: RETURN_CVAR_ARRAY_ESCAPED("%s", v->a_datetime);
	case CIM_ARR_REFERENCE: RETURN_CVAR_ARRAY_ESCAPED("%s", v->a_reference);
	default: return talloc_asprintf(mem_ctx, "Unsupported");
	}
}

#undef RETURN_CVAR_ARRAY_STR

int main(int argc, char **argv)
{
	struct program_args args = {};
	uint32_t cnt = 5, ret;
	char *class_name = NULL;
	WERROR result;
	NTSTATUS status;
	struct IWbemServices *pWS = NULL;
	struct BSTR queryLanguage, query;
	struct IEnumWbemClassObject *pEnum = NULL;
	struct com_context *ctx = NULL;

	parse_args(argc, argv, &args);

	wmi_init(&ctx, cmdline_credentials);

	if (!args.ns)
		args.ns = "root\\cimv2";
	result = WBEM_ConnectServer(ctx, args.hostname, args.ns, 0, 0, 0, 0, 0, 0, &pWS);
	WERR_CHECK("Login to remote object.");

	queryLanguage.data = "WQL";
	query.data = args.query;
	result = IWbemServices_ExecQuery(pWS, ctx, queryLanguage, query, WBEM_FLAG_RETURN_IMMEDIATELY | WBEM_FLAG_ENSURE_LOCATABLE, NULL, &pEnum);
	WERR_CHECK("WMI query execute.");

	IEnumWbemClassObject_Reset(pEnum, ctx);
	WERR_CHECK("Reset result of WMI query.");

	do {
		uint32_t i, j;
		struct WbemClassObject *co[cnt];

		result = IEnumWbemClassObject_SmartNext(pEnum, ctx, 0xFFFFFFFF, cnt, co, &ret);
		/* WERR_BADFUNC is OK, it means only that there is less returned objects than requested */
		if (!W_ERROR_EQUAL(result, WERR_BADFUNC)) {
			WERR_CHECK("Retrieve result data.");
		} else {
			DEBUG(1, ("OK   : Retrieved less objects than requested (it is normal).\n"));
		}
		if (!ret) break;

		for (i = 0; i < ret; ++i) {
			if (!class_name || strcmp(co[i]->obj_class->__CLASS, class_name)) {
				if (class_name) talloc_free(class_name);
				class_name = talloc_strdup(ctx, co[i]->obj_class->__CLASS);
				printf("CLASS: %s\n", class_name);
				for (j = 0; j < co[i]->obj_class->__PROPERTY_COUNT; ++j)
					printf("%s%s", j?"|":"", co[i]->obj_class->properties[j].property.name);
				printf("\n");
			}
			for (j = 0; j < co[i]->obj_class->__PROPERTY_COUNT; ++j) {
				char *s;
				s = string_CIMVAR(ctx, &co[i]->instance->data[j], co[i]->obj_class->properties[j].property.desc->cimtype & CIM_TYPEMASK);
				printf("%s%s", j?"|":"", s);
			}
			printf("\n");
		}
	} while (ret == cnt);
	talloc_free(ctx);
	return 0;
error:
	status = werror_to_ntstatus(result);
	fprintf(stderr, "NTSTATUS: %s - %s\n", nt_errstr(status), get_friendly_nt_error_msg(status));
	talloc_free(ctx);
	return 1;
}
