#define _XOPEN_SOURCE 500
#include <stdlib.h>

#include "ua_types.h"
#include "ua_types_generated.h"
#include "ua_types_encoding_binary.h"
#include "ua_util.h"
#include "check.h"

START_TEST(newAndEmptyObjectShallBeDeleted) {
	// given
	void *obj = UA_new(&UA_TYPES[_i]);
	// then
	ck_assert_ptr_ne(obj, NULL);
    // finally
	UA_delete(obj, &UA_TYPES[_i]);
}
END_TEST

START_TEST(arrayCopyShallMakeADeepCopy) {
	// given
	UA_String a1[3];
	a1[0] = (UA_String){1, (UA_Byte*)"a"};
	a1[1] = (UA_String){2, (UA_Byte*)"bb"};
	a1[2] = (UA_String){3, (UA_Byte*)"ccc"};
	// when
	UA_String *a2;
	UA_Int32 retval = UA_Array_copy((const void *)a1, 3, (void **)&a2, &UA_TYPES[UA_TYPES_STRING]);
	// then
	ck_assert_int_eq(retval, UA_STATUSCODE_GOOD);
	ck_assert_int_eq(a1[0].length, 1);
	ck_assert_int_eq(a1[1].length, 2);
	ck_assert_int_eq(a1[2].length, 3);
	ck_assert_int_eq(a1[0].length, a2[0].length);
	ck_assert_int_eq(a1[1].length, a2[1].length);
	ck_assert_int_eq(a1[2].length, a2[2].length);
	ck_assert_ptr_ne(a1[0].data, a2[0].data);
	ck_assert_ptr_ne(a1[1].data, a2[1].data);
	ck_assert_ptr_ne(a1[2].data, a2[2].data);
	ck_assert_int_eq(a1[0].data[0], a2[0].data[0]);
	ck_assert_int_eq(a1[1].data[0], a2[1].data[0]);
	ck_assert_int_eq(a1[2].data[0], a2[2].data[0]);
	// finally
	UA_Array_delete((void *)a2, 3, &UA_TYPES[UA_TYPES_STRING]);
}
END_TEST

START_TEST(encodeShallYieldDecode) {
	// given
	UA_ByteString msg1, msg2;
	size_t pos = 0;
	void *obj1 = UA_new(&UA_TYPES[_i]);
    UA_StatusCode retval = UA_ByteString_allocBuffer(&msg1, 65000); // fixed buf size
	ck_assert_int_eq(retval, UA_STATUSCODE_GOOD);
    retval = UA_encodeBinary(obj1, &UA_TYPES[_i], &msg1, &pos);
    msg1.length = pos;
	if(retval != UA_STATUSCODE_GOOD) {
		UA_delete(obj1, &UA_TYPES[_i]);
		UA_ByteString_deleteMembers(&msg1);
		return;	
	}

	// when
	void *obj2 = UA_new(&UA_TYPES[_i]);
	pos = 0; retval = UA_decodeBinary(&msg1, &pos, obj2, &UA_TYPES[_i]);
	ck_assert_msg(retval == UA_STATUSCODE_GOOD, "could not decode idx=%d,nodeid=%i", _i, UA_TYPES[_i].typeId.identifier.numeric);
	ck_assert(!memcmp(obj1, obj2, UA_TYPES[_i].memSize)); // bit identical decoding
    assert(!memcmp(obj1, obj2, UA_TYPES[_i].memSize));
	retval = UA_ByteString_allocBuffer(&msg2, 65000);
	ck_assert_int_eq(retval, UA_STATUSCODE_GOOD);
	pos = 0; retval = UA_encodeBinary(obj2, &UA_TYPES[_i], &msg2, &pos);
    msg2.length = pos;
	ck_assert_int_eq(retval, UA_STATUSCODE_GOOD);

	// then
	ck_assert_msg(UA_ByteString_equal(&msg1, &msg2) == UA_TRUE, "messages differ idx=%d,nodeid=%i", _i,
                  UA_TYPES[_i].typeId.identifier.numeric);

	// finally
	UA_delete(obj1, &UA_TYPES[_i]);
	UA_delete(obj2, &UA_TYPES[_i]);
	UA_ByteString_deleteMembers(&msg1);
	UA_ByteString_deleteMembers(&msg2);
}
END_TEST

START_TEST(decodeShallFailWithTruncatedBufferButSurvive) {
	// given
	UA_ByteString msg1;
	void *obj1 = UA_new(&UA_TYPES[_i]);
	size_t pos = 0;
    UA_StatusCode retval = UA_ByteString_allocBuffer(&msg1, 65000); // fixed buf size
    retval |= UA_encodeBinary(obj1, &UA_TYPES[_i], &msg1, &pos);
	UA_delete(obj1, &UA_TYPES[_i]);
    if(retval != UA_STATUSCODE_GOOD) {
        UA_ByteString_deleteMembers(&msg1);
        return; // e.g. variants cannot be encoded after an init without failing (no datatype set)
    }
	// when
	void *obj2 = UA_new(&UA_TYPES[_i]);
	pos = 0;
	msg1.length = pos / 2;
	//fprintf(stderr,"testing %s with half buffer\n",UA_TYPES[_i].name);
	retval = UA_decodeBinary(&msg1, &pos, obj2, &UA_TYPES[_i]);
	ck_assert_int_ne(retval, UA_STATUSCODE_GOOD);
	//then
	// finally
	//fprintf(stderr,"delete %s with half buffer\n",UA_TYPES[_i].name);
	UA_delete(obj2, &UA_TYPES[_i]);
	UA_ByteString_deleteMembers(&msg1);
}
END_TEST

#define RANDOM_TESTS 1000

START_TEST(decodeScalarBasicTypeFromRandomBufferShallSucceed) {
	// given
	void *obj1 = NULL;
	UA_ByteString msg1;
	UA_Int32 retval = UA_STATUSCODE_GOOD;
	UA_Int32 buflen = 256;
	retval = UA_ByteString_allocBuffer(&msg1, buflen); // fixed size
#ifdef _WIN32
	srand(42);
#else
	srandom(42);
#endif
	for(int n = 0;n < RANDOM_TESTS;n++) {
		for(UA_Int32 i = 0;i < buflen;i++) {
#ifdef _WIN32
			UA_UInt32 rnd;
			rnd = rand();
			msg1.data[i] = rnd;
#else
			msg1.data[i] = (UA_Byte)random();  // when
#endif
		}
		size_t pos = 0;
		obj1 = UA_new(&UA_TYPES[_i]);
		retval |= UA_decodeBinary(&msg1, &pos, obj1, &UA_TYPES[_i]);
		//then
		ck_assert_msg(retval == UA_STATUSCODE_GOOD, "Decoding %d from random buffer", UA_TYPES[_i].typeId.identifier.numeric);
		// finally
		UA_delete(obj1, &UA_TYPES[_i]);
	}
	UA_ByteString_deleteMembers(&msg1);
}
END_TEST

START_TEST(decodeComplexTypeFromRandomBufferShallSurvive) {
	// given
	UA_ByteString msg1;
	UA_Int32 retval = UA_STATUSCODE_GOOD;
	UA_Int32 buflen = 256;
	retval = UA_ByteString_allocBuffer(&msg1, buflen); // fixed size
#ifdef _WIN32
	srand(42);
#else
	srandom(42);
#endif
	// when
	for(int n = 0;n < RANDOM_TESTS;n++) {
		for(UA_Int32 i = 0;i < buflen;i++) {
#ifdef _WIN32
			UA_UInt32 rnd;
			rnd = rand();
			msg1.data[i] = rnd;
#else
			msg1.data[i] = (UA_Byte)random();  // when
#endif
		}
		size_t pos = 0;
		void *obj1 = UA_new(&UA_TYPES[_i]);
		retval |= UA_decodeBinary(&msg1, &pos, obj1, &UA_TYPES[_i]);
		UA_delete(obj1, &UA_TYPES[_i]);
	}

	// finally
	UA_ByteString_deleteMembers(&msg1);
}
END_TEST

START_TEST(calcSizeBinaryShallBeCorrect) {
	// given
	void *obj = UA_new(&UA_TYPES[_i]);
    size_t predicted_size = UA_calcSizeBinary(obj, &UA_TYPES[_i]);
    UA_ByteString msg;
    UA_StatusCode retval = UA_ByteString_allocBuffer(&msg, predicted_size);
	ck_assert_int_eq(retval, UA_STATUSCODE_GOOD);
    size_t offset = 0;
    retval = UA_encodeBinary(obj, &UA_TYPES[_i], &msg, &offset);
	ck_assert_int_eq(retval, UA_STATUSCODE_GOOD);
	ck_assert_int_eq(offset, predicted_size);
    UA_delete(obj, &UA_TYPES[_i]);
    UA_ByteString_deleteMembers(&msg);
}
END_TEST

int main(void) {
	int number_failed = 0;
	SRunner *sr;

	Suite *s  = suite_create("testMemoryHandling");
	TCase *tc = tcase_create("Empty Objects");
	tcase_add_loop_test(tc, newAndEmptyObjectShallBeDeleted, UA_TYPES_BOOLEAN, UA_TYPES_COUNT - 1);
	tcase_add_test(tc, arrayCopyShallMakeADeepCopy);
	tcase_add_loop_test(tc, encodeShallYieldDecode, UA_TYPES_BOOLEAN, UA_TYPES_COUNT - 1);
	suite_add_tcase(s, tc);
	tc = tcase_create("Truncated Buffers");
	tcase_add_loop_test(tc, decodeShallFailWithTruncatedBufferButSurvive, UA_TYPES_BOOLEAN, UA_TYPES_COUNT - 1);
	suite_add_tcase(s, tc);

	tc = tcase_create("Fuzzing with Random Buffers");
	tcase_add_loop_test(tc, decodeScalarBasicTypeFromRandomBufferShallSucceed, UA_TYPES_BOOLEAN, UA_TYPES_DOUBLE);
	tcase_add_loop_test(tc, decodeComplexTypeFromRandomBufferShallSurvive, UA_TYPES_NODEID, UA_TYPES_COUNT - 1);
	suite_add_tcase(s, tc);

	tc = tcase_create("Test calcSizeBinary");
	tcase_add_loop_test(tc, calcSizeBinaryShallBeCorrect, UA_TYPES_BOOLEAN, UA_TYPES_COUNT - 1);

	sr = srunner_create(s);
	srunner_set_fork_status(sr, CK_NOFORK);
	srunner_run_all (sr, CK_NORMAL);
	number_failed += srunner_ntests_failed(sr);
	srunner_free(sr);

	return (number_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}