/*

 *  Copyright (c) 2024, The OpenThread Authors.

 *  All rights reserved.

 *

 *  Redistribution and use in source and binary forms, with or without

 *  modification, are permitted provided that the following conditions are met:

 *  1. Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *  2. Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *  3. Neither the name of the copyright holder nor the

 *     names of its contributors may be used to endorse or promote products

 *     derived from this software without specific prior written permission.

 *

 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 *  POSSIBILITY OF SUCH DAMAGE.

 */

#include <stdio.h>

#include <stdlib.h>

#include <openthread/platform/entropy.h>

#include <openthread/platform/logging.h>

#include <openthread/platform/misc.h>

#include "nexus_core.hpp"

#include "nexus_node.hpp"

namespace ot {

namespace Nexus {

static void LogVarArgs(Node *aActiveNode, const char *aFormat, va_list aArgs);

extern "C" {

//---------------------------------------------------------------------------------------------------------------------

// otTasklets

void otTaskletsSignalPending(otInstance *aInstance)

{

    OT_UNUSED_VARIABLE(aInstance);

    Core::Get().MarkPendingAction();

}

//---------------------------------------------------------------------------------------------------------------------

// otPlatLog

void otPlatLog(otLogLevel aLogLevel, otLogRegion aLogRegion, const char *aFormat, ...)

{

    OT_UNUSED_VARIABLE(aLogLevel);

    OT_UNUSED_VARIABLE(aLogRegion);

    va_list args;

    va_start(args, aFormat);

    LogVarArgs(Core::Get().GetActiveNode(), aFormat, args);

    va_end(args);

}

//---------------------------------------------------------------------------------------------------------------------

// Heap allocation APIs

void *otPlatCAlloc(size_t aNum, size_t aSize)

{

    void *ptr = calloc(aNum, aSize);

    return ptr;

}

void otPlatFree(void *aPtr) { free(aPtr); }

//---------------------------------------------------------------------------------------------------------------------

// Entropy

otError otPlatEntropyGet(uint8_t *aOutput, uint16_t aOutputLength)

{

#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION

    Error  error = OT_ERROR_NONE;

    FILE  *file  = nullptr;

    size_t readLength;

    file = fopen("/dev/urandom", "rb");

    VerifyOrExit(file != nullptr, error = kErrorFailed);

    readLength = fread(aOutput, 1, aOutputLength, file);

    if (readLength != aOutputLength)

    {

        error = kErrorFailed;

    }

    fclose(file);

exit:

    return error;

#else

    for (uint16_t length = 0; length < aOutputLength; length++)

    {

        aOutput[length] = (uint8_t)rand();

    }

    return OT_ERROR_NONE;

#endif

}

//---------------------------------------------------------------------------------------------------------------------

// Misc

otError           otPlatDiagProcess(otInstance *, uint8_t, char *[]) { return kErrorNotImplemented; }

void              otPlatDiagModeSet(bool) {}

bool              otPlatDiagModeGet() { return false; }

void              otPlatDiagChannelSet(uint8_t) {}

void              otPlatDiagTxPowerSet(int8_t) {}

void              otPlatDiagRadioReceived(otInstance *, otRadioFrame *, otError) {}

void              otPlatDiagAlarmCallback(otInstance *) {}

void              otPlatUartSendDone(void) {}

void              otPlatUartReceived(const uint8_t *, uint16_t) {}

void              otPlatReset(otInstance *) {}

otError           otPlatResetToBootloader(otInstance *) { return kErrorNotImplemented; }

otPlatResetReason otPlatGetResetReason(otInstance *) { return OT_PLAT_RESET_REASON_POWER_ON; }

void              otPlatWakeHost(void) {}

} // extern "C"

//---------------------------------------------------------------------------------------------------------------------

// Log related function

void Log(const char *aFormat, ...)

{

    va_list args;

    va_start(args, aFormat);

    LogVarArgs(nullptr, aFormat, args);

    va_end(args);

}

static void LogVarArgs(Node *aActiveNode, const char *aFormat, va_list aArgs)

{

    uint32_t now = Core::Get().GetNow().GetValue();

    printf("%02u:%02u:%02u.%03u ", now / 3600000, (now / 60000) % 60, (now / 1000) % 60, now % 1000);

    if (aActiveNode != nullptr)

    {

        printf("%03u ", aActiveNode->GetInstance().GetId());

    }

    vprintf(aFormat, aArgs);

    printf("\n");

}

} // namespace Nexus

} // namespace ot