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 *     derived from this software without specific prior written permission.
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 */

#include <stdio.h>

#include <openthread/platform/dnssd.h>

#include "test_platform.h"
#include "test_util.h"
#include "common/code_utils.hpp"
#include "lib/spinel/spinel_buffer.hpp"
#include "lib/spinel/spinel_encoder.hpp"
#include "ncp/ncp_base.hpp"

#if OPENTHREAD_CONFIG_NCP_DNSSD_ENABLE && OPENTHREAD_CONFIG_PLATFORM_DNSSD_ENABLE

namespace ot {

constexpr uint16_t kMaxSpinelBufferSize = 2048;
static uint32_t    sRequestId;
static uint8_t     sError;

static otError GenerateSpinelDnssdSetStateFrame(otPlatDnssdState aState, uint8_t *aBuf, uint16_t &aLen)
{
    otError         error = OT_ERROR_NONE;
    uint8_t         buf[kMaxSpinelBufferSize];
    Spinel::Buffer  ncpBuffer(buf, kMaxSpinelBufferSize);
    Spinel::Encoder encoder(ncpBuffer);

    uint8_t header = SPINEL_HEADER_FLAG | 0 /* Iid */ | 1 /* Tid */;
    SuccessOrExit(error = encoder.BeginFrame(header, SPINEL_CMD_PROP_VALUE_SET, SPINEL_PROP_DNSSD_STATE));
    SuccessOrExit(error = encoder.WriteUint8(aState));
    SuccessOrExit(error = encoder.EndFrame());

    SuccessOrExit(ncpBuffer.OutFrameBegin());
    aLen = ncpBuffer.OutFrameGetLength();
    VerifyOrExit(ncpBuffer.OutFrameRead(aLen, aBuf) == aLen, error = OT_ERROR_FAILED);

exit:
    return error;
}

static void TestPlatDnssdRegisterCallback(otInstance *aInstance, otPlatDnssdRequestId aRequestId, otError aError)
{
    sRequestId = aRequestId;
    sError     = aError;
}

static otError GenerateSpinelDnssdRequestResultFrame(uint32_t aRequestId, otError aError, uint8_t *aBuf, uint16_t &aLen)
{
    otError                     error = OT_ERROR_NONE;
    uint8_t                     buf[kMaxSpinelBufferSize];
    Spinel::Buffer              ncpBuffer(buf, kMaxSpinelBufferSize);
    Spinel::Encoder             encoder(ncpBuffer);
    otPlatDnssdRegisterCallback callback = &TestPlatDnssdRegisterCallback;

    uint8_t header = SPINEL_HEADER_FLAG | 0 /* Iid */ | 1 /* Tid */;
    SuccessOrExit(error = encoder.BeginFrame(header, SPINEL_CMD_PROP_VALUE_SET, SPINEL_PROP_DNSSD_REQUEST_RESULT));
    SuccessOrExit(error = encoder.WriteUint8(aError));
    SuccessOrExit(error = encoder.WriteUint32(aRequestId));
    SuccessOrExit(error = encoder.WriteData(reinterpret_cast<const uint8_t *>(&callback), sizeof(callback)));
    SuccessOrExit(error = encoder.EndFrame());

    SuccessOrExit(ncpBuffer.OutFrameBegin());
    aLen = ncpBuffer.OutFrameGetLength();
    VerifyOrExit(ncpBuffer.OutFrameRead(aLen, aBuf) == aLen, error = OT_ERROR_FAILED);

exit:
    return error;
}

void TestNcpDnssdGetState(void)
{
    Instance    *instance = static_cast<Instance *>(testInitInstance());
    Ncp::NcpBase ncpBase(instance);

    uint8_t          recvBuf[kMaxSpinelBufferSize];
    uint16_t         recvLen;
    otPlatDnssdState dnssdState;

    dnssdState = otPlatDnssdGetState(instance);
    VerifyOrQuit(dnssdState == OT_PLAT_DNSSD_STOPPED);

    SuccessOrQuit(GenerateSpinelDnssdSetStateFrame(OT_PLAT_DNSSD_READY, recvBuf, recvLen));
    ncpBase.HandleReceive(recvBuf, recvLen);
    dnssdState = otPlatDnssdGetState(instance);
    VerifyOrQuit(dnssdState == OT_PLAT_DNSSD_READY);
}

void TestNcpDnssdRegistrations(void)
{
    Instance    *instance = static_cast<Instance *>(testInitInstance());
    Ncp::NcpBase ncpBase(instance);

    uint8_t            recvBuf[kMaxSpinelBufferSize];
    uint16_t           recvLen;
    otPlatDnssdHost    dnssdHost;
    otPlatDnssdService dnssdService;
    otPlatDnssdKey     dnssdKey;

    sRequestId = 0; // Use 0 to indicate `sRequestId` hasn't been set.

    // Register a dnssd host when the dnssd state is DISABLED
    dnssdHost.mHostName        = "ot-test";
    dnssdHost.mAddressesLength = 0;
    otPlatDnssdRegisterHost(instance, &dnssdHost, 1 /* aRequestId */, TestPlatDnssdRegisterCallback);
    VerifyOrQuit(sRequestId == 1);
    VerifyOrQuit(sError == OT_ERROR_INVALID_STATE);

    // Set the dnssd state to READY
    SuccessOrQuit(GenerateSpinelDnssdSetStateFrame(OT_PLAT_DNSSD_READY, recvBuf, recvLen));
    ncpBase.HandleReceive(recvBuf, recvLen);

    otPlatDnssdUnregisterHost(instance, &dnssdHost, 2 /* aRequestId */, TestPlatDnssdRegisterCallback);
    SuccessOrQuit(GenerateSpinelDnssdRequestResultFrame(2 /* aRequestId */, OT_ERROR_NOT_FOUND, recvBuf, recvLen));
    ncpBase.HandleReceive(recvBuf, recvLen);
    VerifyOrQuit(sRequestId == 2);
    VerifyOrQuit(sError == OT_ERROR_NOT_FOUND);

    dnssdService.mHostName            = "test-service";
    dnssdService.mServiceInstance     = nullptr;
    dnssdService.mServiceType         = nullptr;
    dnssdService.mSubTypeLabelsLength = 0;
    dnssdService.mPort                = 1234;
    dnssdService.mTxtDataLength       = 0;
    otPlatDnssdRegisterService(instance, &dnssdService, 3 /* aRequestId */, TestPlatDnssdRegisterCallback);
    SuccessOrQuit(GenerateSpinelDnssdRequestResultFrame(3 /* aRequestId */, OT_ERROR_NONE, recvBuf, recvLen));
    ncpBase.HandleReceive(recvBuf, recvLen);
    VerifyOrQuit(sRequestId == 3);
    VerifyOrQuit(sError == OT_ERROR_NONE);

    sRequestId = 0;
    sError     = OT_ERROR_FAILED;
    otPlatDnssdUnregisterService(instance, &dnssdService, 3 /* aRequestId */, TestPlatDnssdRegisterCallback);
    ncpBase.HandleReceive(recvBuf, recvLen);
    VerifyOrQuit(sRequestId == 3);
    VerifyOrQuit(sError == OT_ERROR_NONE);

    dnssdKey.mName          = "test-key";
    dnssdKey.mServiceType   = "someType";
    dnssdKey.mKeyDataLength = 0;
    otPlatDnssdRegisterKey(instance, &dnssdKey, 4 /* aRequestId */, TestPlatDnssdRegisterCallback);
    SuccessOrQuit(GenerateSpinelDnssdRequestResultFrame(4 /* aRequestId */, OT_ERROR_NONE, recvBuf, recvLen));
    ncpBase.HandleReceive(recvBuf, recvLen);
    VerifyOrQuit(sRequestId == 4);
    VerifyOrQuit(sError == OT_ERROR_NONE);

    sRequestId = 0;
    sError     = OT_ERROR_FAILED;
    otPlatDnssdUnregisterKey(instance, &dnssdKey, 4 /* aRequestId */, TestPlatDnssdRegisterCallback);
    ncpBase.HandleReceive(recvBuf, recvLen);
    VerifyOrQuit(sRequestId == 4);
    VerifyOrQuit(sError == OT_ERROR_NONE);
}

} // namespace ot

#endif // OPENTHREAD_CONFIG_NCP_DNSSD_ENABLE && OPENTHREAD_CONFIG_PLATFORM_DNSSD_ENABLE

int main(void)
{
#if OPENTHREAD_CONFIG_NCP_DNSSD_ENABLE && OPENTHREAD_CONFIG_PLATFORM_DNSSD_ENABLE
    ot::TestNcpDnssdGetState();
    ot::TestNcpDnssdRegistrations();
#endif
    printf("All tests passed\n");
    return 0;
}