#include <winpr/crt.h>
#include <winpr/print.h>
#include <winpr/stream.h>

static BOOL TestStream_Verify(wStream* s, size_t mincap, size_t len, size_t pos)
{
	if (Stream_Buffer(s) == NULL)
	{
		printf("stream buffer is null\n");
		return FALSE;
	}

	if (Stream_ConstPointer(s) == NULL)
	{
		printf("stream pointer is null\n");
		return FALSE;
	}

	if (Stream_PointerAs(s, BYTE) < Stream_Buffer(s))
	{
		printf("stream pointer (%p) or buffer (%p) is invalid\n", Stream_ConstPointer(s),
		       (void*)Stream_Buffer(s));
		return FALSE;
	}

	if (Stream_Capacity(s) < mincap)
	{
		printf("stream capacity is %" PRIuz " but minimum expected value is %" PRIuz "\n",
		       Stream_Capacity(s), mincap);
		return FALSE;
	}

	if (Stream_Length(s) != len)
	{
		printf("stream has unexpected length (%" PRIuz " instead of %" PRIuz ")\n",
		       Stream_Length(s), len);
		return FALSE;
	}

	if (Stream_GetPosition(s) != pos)
	{
		printf("stream has unexpected position (%" PRIuz " instead of %" PRIuz ")\n",
		       Stream_GetPosition(s), pos);
		return FALSE;
	}

	if (Stream_GetPosition(s) > Stream_Length(s))
	{
		printf("stream position (%" PRIuz ") exceeds length (%" PRIuz ")\n", Stream_GetPosition(s),
		       Stream_Length(s));
		return FALSE;
	}

	if (Stream_GetPosition(s) > Stream_Capacity(s))
	{
		printf("stream position (%" PRIuz ") exceeds capacity (%" PRIuz ")\n",
		       Stream_GetPosition(s), Stream_Capacity(s));
		return FALSE;
	}

	if (Stream_Length(s) > Stream_Capacity(s))
	{
		printf("stream length (%" PRIuz ") exceeds capacity (%" PRIuz ")\n", Stream_Length(s),
		       Stream_Capacity(s));
		return FALSE;
	}

	if (Stream_GetRemainingLength(s) != len - pos)
	{
		printf("stream remaining length (%" PRIuz " instead of %" PRIuz ")\n",
		       Stream_GetRemainingLength(s), len - pos);
		return FALSE;
	}

	return TRUE;
}

static BOOL TestStream_New(void)
{
	wStream* s = NULL;
	/* Test creation of a 0-size stream with no buffer */
	s = Stream_New(NULL, 0);

	if (s)
		return FALSE;

	return TRUE;
}

static BOOL TestStream_Static(void)
{
	BYTE buffer[20];
	wStream staticStream;
	wStream* s = &staticStream;
	UINT16 v = 0;
	/* Test creation of a static stream */
	Stream_StaticInit(s, buffer, sizeof(buffer));
	Stream_Write_UINT16(s, 0xcab1);
	Stream_SetPosition(s, 0);
	Stream_Read_UINT16(s, v);

	if (v != 0xcab1)
		return FALSE;

	Stream_SetPosition(s, 0);
	Stream_Write_UINT16(s, 1);

	if (!Stream_EnsureRemainingCapacity(s, 10)) /* we can ask for 10 bytes */
		return FALSE;

	/* 30 is bigger than the buffer, it will be reallocated on the heap */
	if (!Stream_EnsureRemainingCapacity(s, 30) || !s->isOwner)
		return FALSE;

	Stream_Write_UINT16(s, 2);
	Stream_SetPosition(s, 0);
	Stream_Read_UINT16(s, v);

	if (v != 1)
		return FALSE;

	Stream_Read_UINT16(s, v);

	if (v != 2)
		return FALSE;

	// Intentional warning as the stream is not allocated.
	// Still, Stream_Free should not release such memory, therefore this statement
	// is required to test that.
	WINPR_PRAGMA_DIAG_PUSH
	WINPR_PRAGMA_DIAG_IGNORED_MISMATCHED_DEALLOC
	Stream_Free(s, TRUE);
	WINPR_PRAGMA_DIAG_POP
	return TRUE;
}

static BOOL TestStream_Create(size_t count, BOOL selfAlloc)
{
	size_t len = 0;
	size_t cap = 0;
	wStream* s = NULL;
	void* buffer = NULL;

	for (size_t i = 0; i < count; i++)
	{
		len = cap = i + 1;

		if (selfAlloc)
		{
			if (!(buffer = malloc(cap)))
			{
				printf("%s: failed to allocate buffer of size %" PRIuz "\n", __func__, cap);
				goto fail;
			}
		}

		if (!(s = Stream_New(selfAlloc ? buffer : NULL, len)))
		{
			printf("%s: Stream_New failed for stream #%" PRIuz "\n", __func__, i);
			goto fail;
		}

		if (!TestStream_Verify(s, cap, len, 0))
		{
			goto fail;
		}

		for (size_t pos = 0; pos < len; pos++)
		{
			Stream_SetPosition(s, pos);
			Stream_SealLength(s);

			if (!TestStream_Verify(s, cap, pos, pos))
			{
				goto fail;
			}
		}

		if (selfAlloc)
		{
			memset(buffer, i % 256, cap);

			if (memcmp(buffer, Stream_Buffer(s), cap))
			{
				printf("%s: buffer memory corruption\n", __func__);
				goto fail;
			}
		}

		Stream_Free(s, buffer ? FALSE : TRUE);
		free(buffer);
	}

	return TRUE;
fail:
	free(buffer);

	if (s)
	{
		Stream_Free(s, buffer ? FALSE : TRUE);
	}

	return FALSE;
}

static BOOL TestStream_Extent(UINT32 maxSize)
{
	wStream* s = NULL;
	BOOL result = FALSE;

	if (!(s = Stream_New(NULL, 1)))
	{
		printf("%s: Stream_New failed\n", __func__);
		return FALSE;
	}

	for (UINT32 i = 1; i < maxSize; i++)
	{
		if (i % 2)
		{
			if (!Stream_EnsureRemainingCapacity(s, i))
				goto fail;
		}
		else
		{
			if (!Stream_EnsureCapacity(s, i))
				goto fail;
		}

		Stream_SetPosition(s, i);
		Stream_SealLength(s);

		if (!TestStream_Verify(s, i, i, i))
		{
			printf("%s: failed to verify stream in iteration %" PRIu32 "\n", __func__, i);
			goto fail;
		}
	}

	result = TRUE;
fail:

	if (s)
	{
		Stream_Free(s, TRUE);
	}

	return result;
}

#define Stream_Peek_UINT8_BE Stream_Peek_UINT8
#define Stream_Read_UINT8_BE Stream_Read_UINT8
#define Stream_Peek_INT8_BE Stream_Peek_INT8
#define Stream_Read_INT8_BE Stream_Read_INT8

#define TestStream_PeekAndRead(_s, _r, _t)                            \
	do                                                                \
	{                                                                 \
		_t _a;                                                        \
		_t _b;                                                        \
		BYTE* _p = Stream_Buffer(_s);                                 \
		Stream_SetPosition(_s, 0);                                    \
		Stream_Peek_##_t(_s, _a);                                     \
		Stream_Read_##_t(_s, _b);                                     \
		if (_a != _b)                                                 \
		{                                                             \
			printf("%s: test1 " #_t "_LE failed\n", __func__);        \
			_r = FALSE;                                               \
		}                                                             \
		for (size_t _i = 0; _i < sizeof(_t); _i++)                    \
		{                                                             \
			if (((_a >> (_i * 8)) & 0xFF) != _p[_i])                  \
			{                                                         \
				printf("%s: test2 " #_t "_LE failed\n", __func__);    \
				_r = FALSE;                                           \
				break;                                                \
			}                                                         \
		}                                                             \
		/* printf("a: 0x%016llX\n", a); */                            \
		Stream_SetPosition(_s, 0);                                    \
		Stream_Peek_##_t##_BE(_s, _a);                                \
		Stream_Read_##_t##_BE(_s, _b);                                \
		if (_a != _b)                                                 \
		{                                                             \
			printf("%s: test1 " #_t "_BE failed\n", __func__);        \
			_r = FALSE;                                               \
		}                                                             \
		for (size_t _i = 0; _i < sizeof(_t); _i++)                    \
		{                                                             \
			if (((_a >> (_i * 8)) & 0xFF) != _p[sizeof(_t) - _i - 1]) \
			{                                                         \
				printf("%s: test2 " #_t "_BE failed\n", __func__);    \
				_r = FALSE;                                           \
				break;                                                \
			}                                                         \
		}                                                             \
		/* printf("a: 0x%016llX\n", a); */                            \
	} while (0)

static BOOL TestStream_Reading(void)
{
	BYTE src[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
	wStream* s = NULL;
	BOOL result = TRUE;

	if (!(s = Stream_New(src, sizeof(src))))
	{
		printf("%s: Stream_New failed\n", __func__);
		return FALSE;
	}

	TestStream_PeekAndRead(s, result, UINT8);
	TestStream_PeekAndRead(s, result, INT8);
	TestStream_PeekAndRead(s, result, UINT16);
	TestStream_PeekAndRead(s, result, INT16);
	TestStream_PeekAndRead(s, result, UINT32);
	TestStream_PeekAndRead(s, result, INT32);
	TestStream_PeekAndRead(s, result, UINT64);
	TestStream_PeekAndRead(s, result, INT64);
	Stream_Free(s, FALSE);
	return result;
}

static BOOL TestStream_Write(void)
{
	BOOL rc = FALSE;
	UINT8 u8 = 0;
	UINT16 u16 = 0;
	UINT32 u32 = 0;
	UINT64 u64 = 0;
	const BYTE data[] = "someteststreamdata";
	wStream* s = Stream_New(NULL, 100);

	if (!s)
		goto out;

	if (s->pointer != s->buffer)
		goto out;

	Stream_Write(s, data, sizeof(data));

	if (memcmp(Stream_Buffer(s), data, sizeof(data)) == 0)
		rc = TRUE;

	if (s->pointer != s->buffer + sizeof(data))
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	Stream_Write_UINT8(s, 42);

	if (s->pointer != s->buffer + 1)
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	Stream_Peek_UINT8(s, u8);

	if (u8 != 42)
		goto out;

	Stream_Write_UINT16(s, 0x1234);

	if (s->pointer != s->buffer + 2)
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	Stream_Peek_UINT16(s, u16);

	if (u16 != 0x1234)
		goto out;

	Stream_Write_UINT32(s, 0x12345678UL);

	if (s->pointer != s->buffer + 4)
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	Stream_Peek_UINT32(s, u32);

	if (u32 != 0x12345678UL)
		goto out;

	Stream_Write_UINT64(s, 0x1234567890ABCDEFULL);

	if (s->pointer != s->buffer + 8)
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	Stream_Peek_UINT64(s, u64);

	if (u64 != 0x1234567890ABCDEFULL)
		goto out;

out:
	Stream_Free(s, TRUE);
	return rc;
}

static BOOL TestStream_Seek(void)
{
	BOOL rc = FALSE;
	wStream* s = Stream_New(NULL, 100);

	if (!s)
		goto out;

	if (s->pointer != s->buffer)
		goto out;

	Stream_Seek(s, 5);

	if (s->pointer != s->buffer + 5)
		goto out;

	Stream_Seek_UINT8(s);

	if (s->pointer != s->buffer + 6)
		goto out;

	Stream_Seek_UINT16(s);

	if (s->pointer != s->buffer + 8)
		goto out;

	Stream_Seek_UINT32(s);

	if (s->pointer != s->buffer + 12)
		goto out;

	Stream_Seek_UINT64(s);

	if (s->pointer != s->buffer + 20)
		goto out;

	rc = TRUE;
out:
	Stream_Free(s, TRUE);
	return rc;
}

static BOOL TestStream_Rewind(void)
{
	BOOL rc = FALSE;
	wStream* s = Stream_New(NULL, 100);

	if (!s)
		goto out;

	if (s->pointer != s->buffer)
		goto out;

	Stream_Seek(s, 100);

	if (s->pointer != s->buffer + 100)
		goto out;

	Stream_Rewind(s, 10);

	if (s->pointer != s->buffer + 90)
		goto out;

	Stream_Rewind_UINT8(s);

	if (s->pointer != s->buffer + 89)
		goto out;

	Stream_Rewind_UINT16(s);

	if (s->pointer != s->buffer + 87)
		goto out;

	Stream_Rewind_UINT32(s);

	if (s->pointer != s->buffer + 83)
		goto out;

	Stream_Rewind_UINT64(s);

	if (s->pointer != s->buffer + 75)
		goto out;

	rc = TRUE;
out:
	Stream_Free(s, TRUE);
	return rc;
}

static BOOL TestStream_Zero(void)
{
	BOOL rc = FALSE;
	const BYTE data[] = "someteststreamdata";
	wStream* s = Stream_New(NULL, sizeof(data));

	if (!s)
		goto out;

	Stream_Write(s, data, sizeof(data));

	if (memcmp(Stream_Buffer(s), data, sizeof(data)) != 0)
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	Stream_Zero(s, 5);

	if (s->pointer != s->buffer + 5)
		goto out;

	if (memcmp(Stream_ConstPointer(s), data + 5, sizeof(data) - 5) != 0)
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	for (UINT32 x = 0; x < 5; x++)
	{
		UINT8 val = 0;
		Stream_Read_UINT8(s, val);

		if (val != 0)
			goto out;
	}

	rc = TRUE;
out:
	Stream_Free(s, TRUE);
	return rc;
}

static BOOL TestStream_Fill(void)
{
	BOOL rc = FALSE;
	const BYTE fill[7] = "XXXXXXX";
	const BYTE data[] = "someteststreamdata";
	wStream* s = Stream_New(NULL, sizeof(data));

	if (!s)
		goto out;

	Stream_Write(s, data, sizeof(data));

	if (memcmp(Stream_Buffer(s), data, sizeof(data)) != 0)
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	Stream_Fill(s, fill[0], sizeof(fill));

	if (s->pointer != s->buffer + sizeof(fill))
		goto out;

	if (memcmp(Stream_ConstPointer(s), data + sizeof(fill), sizeof(data) - sizeof(fill)) != 0)
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	if (memcmp(Stream_ConstPointer(s), fill, sizeof(fill)) != 0)
		goto out;

	rc = TRUE;
out:
	Stream_Free(s, TRUE);
	return rc;
}

static BOOL TestStream_Copy(void)
{
	BOOL rc = FALSE;
	const BYTE data[] = "someteststreamdata";
	wStream* s = Stream_New(NULL, sizeof(data));
	wStream* d = Stream_New(NULL, sizeof(data));

	if (!s || !d)
		goto out;

	if (s->pointer != s->buffer)
		goto out;

	Stream_Write(s, data, sizeof(data));

	if (memcmp(Stream_Buffer(s), data, sizeof(data)) != 0)
		goto out;

	if (s->pointer != s->buffer + sizeof(data))
		goto out;

	Stream_SetPosition(s, 0);

	if (s->pointer != s->buffer)
		goto out;

	Stream_Copy(s, d, sizeof(data));

	if (s->pointer != s->buffer + sizeof(data))
		goto out;

	if (d->pointer != d->buffer + sizeof(data))
		goto out;

	if (Stream_GetPosition(s) != Stream_GetPosition(d))
		goto out;

	if (memcmp(Stream_Buffer(s), data, sizeof(data)) != 0)
		goto out;

	if (memcmp(Stream_Buffer(d), data, sizeof(data)) != 0)
		goto out;

	rc = TRUE;
out:
	Stream_Free(s, TRUE);
	Stream_Free(d, TRUE);
	return rc;
}

int TestStream(int argc, char* argv[])
{
	WINPR_UNUSED(argc);
	WINPR_UNUSED(argv);

	if (!TestStream_Create(200, FALSE))
		return 1;

	if (!TestStream_Create(200, TRUE))
		return 2;

	if (!TestStream_Extent(4096))
		return 3;

	if (!TestStream_Reading())
		return 4;

	if (!TestStream_New())
		return 5;

	if (!TestStream_Write())
		return 6;

	if (!TestStream_Seek())
		return 7;

	if (!TestStream_Rewind())
		return 8;

	if (!TestStream_Zero())
		return 9;

	if (!TestStream_Fill())
		return 10;

	if (!TestStream_Copy())
		return 11;

	if (!TestStream_Static())
		return 12;

	return 0;
}
