/*
 *  Copyright (c) 2020, 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.
 */

/**
 * @file
 *   This file implements the radio apis on posix platform.
 */

#include "platform-posix.h"

#include <string.h>

#include <openthread/logging.h>
#include <openthread/platform/diag.h>

#include "common/code_utils.hpp"
#include "common/new.hpp"
#include "common/string.hpp"
#include "posix/platform/radio.hpp"
#include "posix/platform/spinel_driver_getter.hpp"
#include "posix/platform/spinel_manager.hpp"
#include "utils/parse_cmdline.hpp"

#if OPENTHREAD_POSIX_CONFIG_CONFIGURATION_FILE_ENABLE
#include "configuration.hpp"
static ot::Posix::Configuration sConfig;
#endif

static ot::Posix::Radio sRadio;

namespace ot {
namespace Posix {

namespace {
extern "C" void platformRadioInit(const char *aUrl) { sRadio.Init(aUrl); }
} // namespace

const char Radio::kLogModuleName[] = "Radio";

Radio::Radio(void)
    : mRadioSpinel()
#if OPENTHREAD_POSIX_CONFIG_RCP_CAPS_DIAG_ENABLE
    , mRcpCapsDiag(mRadioSpinel)
#endif
#if OPENTHREAD_POSIX_CONFIG_TMP_STORAGE_ENABLE
    , mTmpStorage()
#endif
{
}

#if OPENTHREAD_SPINEL_CONFIG_COPROCESSOR_RESET_FAILURE_CALLBACK_ENABLE
OT_TOOL_WEAK void platformCoprocessorResetFailed(void *) {}
#endif

void Radio::Init(const char *aUrl)
{
    bool      resetRadio;
    bool      skipCompatibilityCheck;
    RadioUrl &radioUrl = SpinelManager::GetSpinelManager().GetRadioUrl();

#if OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2 && OPENTHREAD_CONFIG_MAC_CSL_TRANSMITTER_ENABLE
    bool aEnableRcpTimeSync = true;
#else
    bool aEnableRcpTimeSync = false;
#endif
    struct ot::Spinel::RadioSpinelCallbacks callbacks;

    VerifyOrDie(radioUrl.GetPath() != nullptr, OT_EXIT_INVALID_ARGUMENTS);
    OT_UNUSED_VARIABLE(aUrl);

    memset(&callbacks, 0, sizeof(callbacks));
    callbacks.mEnergyScanDone    = otPlatRadioEnergyScanDone;
    callbacks.mBusLatencyChanged = otPlatRadioBusLatencyChanged;
    callbacks.mReceiveDone       = otPlatRadioReceiveDone;
    callbacks.mTransmitDone      = otPlatRadioTxDone;
    callbacks.mTxStarted         = otPlatRadioTxStarted;
#if OPENTHREAD_POSIX_CONFIG_TMP_STORAGE_ENABLE
    callbacks.mSaveRadioSpinelMetrics    = SaveRadioSpinelMetrics;
    callbacks.mRestoreRadioSpinelMetrics = RestoreRadioSpinelMetrics;
    callbacks.mRadioSpinelMetricsContext = this;
    mTmpStorage.Init();
#endif

    resetRadio             = !radioUrl.HasParam("no-reset");
    skipCompatibilityCheck = radioUrl.HasParam("skip-rcp-compatibility-check");

#if OPENTHREAD_SPINEL_CONFIG_COPROCESSOR_RESET_FAILURE_CALLBACK_ENABLE
    GetSpinelDriver().SetCoprocessorResetFailureCallback(platformCoprocessorResetFailed, this);
#endif

    mRadioSpinel.SetCallbacks(callbacks);
    mRadioSpinel.Init(skipCompatibilityCheck, resetRadio, &GetSpinelDriver(),
                      (skipCompatibilityCheck ? 0 : kRequiredRadioCaps), aEnableRcpTimeSync);

    ProcessRadioUrl(radioUrl);
}

void Radio::Deinit(void)
{
    mRadioSpinel.Deinit();

#if OPENTHREAD_POSIX_CONFIG_TMP_STORAGE_ENABLE
    mTmpStorage.Deinit();
#endif
}

void Radio::ProcessRadioUrl(const RadioUrl &aRadioUrl)
{
    const char *region;
    int8_t      value;

    if (aRadioUrl.HasParam("ncp-dataset"))
    {
        LogCrit("The argument \"ncp-dataset\" is no longer supported");
        DieNow(OT_ERROR_FAILED);
    }

    if (aRadioUrl.HasParam("fem-lnagain"))
    {
        SuccessOrDie(aRadioUrl.ParseInt8("fem-lnagain", value));
        SuccessOrDie(mRadioSpinel.SetFemLnaGain(value));
    }

    if (aRadioUrl.HasParam("cca-threshold"))
    {
        SuccessOrDie(aRadioUrl.ParseInt8("cca-threshold", value));
        SuccessOrDie(mRadioSpinel.SetCcaEnergyDetectThreshold(value));
    }

#if OPENTHREAD_POSIX_CONFIG_CONFIGURATION_FILE_ENABLE
    // config files should be parsed before the region parameter
    if (aRadioUrl.HasParam("product-config-file"))
    {
        const char *configFile = aRadioUrl.GetValue("product-config-file");
        SuccessOrDie(sConfig.SetProductConfigFile(configFile));
    }

    if (aRadioUrl.HasParam("factory-config-file"))
    {
        const char *configFile = aRadioUrl.GetValue("factory-config-file");
        SuccessOrDie(sConfig.SetFactoryConfigFile(configFile));
    }
#endif // OPENTHREAD_POSIX_CONFIG_CONFIGURATION_FILE_ENABLE

    if ((region = aRadioUrl.GetValue("region")) != nullptr)
    {
        uint16_t regionCode;

        VerifyOrDie(strnlen(region, 3) == 2, OT_EXIT_INVALID_ARGUMENTS);
        regionCode = static_cast<uint16_t>(static_cast<uint16_t>(region[0]) << 8) + static_cast<uint16_t>(region[1]);
        SuccessOrDie(otPlatRadioSetRegion(gInstance, regionCode));
    }

    if (aRadioUrl.HasParam("bus-latency"))
    {
        uint32_t busLatency;
        SuccessOrDie(aRadioUrl.ParseUint32("bus-latency", busLatency));
        mRadioSpinel.SetBusLatency(busLatency);
    }

    ProcessMaxPowerTable(aRadioUrl);

#if OPENTHREAD_CONFIG_PLATFORM_RADIO_COEX_ENABLE
    {
        const char *enableCoex = aRadioUrl.GetValue("enable-coex");
        if (enableCoex != nullptr)
        {
            SuccessOrDie(mRadioSpinel.SetCoexEnabled(enableCoex[0] != '0'));
        }
    }
#endif // OPENTHREAD_CONFIG_PLATFORM_RADIO_COEX_ENABLE
}

void Radio::ProcessMaxPowerTable(const RadioUrl &aRadioUrl)
{
    OT_UNUSED_VARIABLE(aRadioUrl);

#if OPENTHREAD_POSIX_CONFIG_MAX_POWER_TABLE_ENABLE
    otError          error;
    constexpr int8_t kPowerDefault     = 30; // Default power 1 watt (30 dBm).
    char            *str               = nullptr;
    char            *pSave             = nullptr;
    uint8_t          channel           = ot::Radio::kChannelMin;
    int8_t           power             = kPowerDefault;
    const char      *maxPowerTable     = nullptr;
    char            *maxPowerTableCopy = nullptr;

    VerifyOrExit((maxPowerTable = aRadioUrl.GetValue("max-power-table")) != nullptr);

    maxPowerTableCopy = strdup(maxPowerTable);
    VerifyOrDie(maxPowerTableCopy != nullptr, OT_EXIT_FAILURE);

    for (str = strtok_r(maxPowerTableCopy, ",", &pSave); str != nullptr && channel <= ot::Radio::kChannelMax;
         str = strtok_r(nullptr, ",", &pSave))
    {
        power = static_cast<int8_t>(strtol(str, nullptr, 0));
        error = mRadioSpinel.SetChannelMaxTransmitPower(channel, power);
        VerifyOrDie((error == OT_ERROR_NONE) || (error == OT_ERROR_NOT_IMPLEMENTED), OT_EXIT_FAILURE);
        if (error == OT_ERROR_NOT_IMPLEMENTED)
        {
            LogWarn("The RCP doesn't support setting the max transmit power");
        }

        ++channel;
    }

    // Use the last power if omitted.
    while (channel <= ot::Radio::kChannelMax)
    {
        error = mRadioSpinel.SetChannelMaxTransmitPower(channel, power);
        VerifyOrDie((error == OT_ERROR_NONE) || (error == OT_ERROR_NOT_IMPLEMENTED), OT_ERROR_FAILED);
        if (error == OT_ERROR_NOT_IMPLEMENTED)
        {
            LogWarn("The RCP doesn't support setting the max transmit power");
        }

        ++channel;
    }

    VerifyOrDie(str == nullptr, OT_EXIT_INVALID_ARGUMENTS);

exit:
    if (maxPowerTableCopy != nullptr)
    {
        free(maxPowerTableCopy);
    }
    return;
#endif // OPENTHREAD_POSIX_CONFIG_MAX_POWER_TABLE_ENABLE
}

} // namespace Posix
} // namespace ot

ot::Spinel::RadioSpinel &GetRadioSpinel(void) { return sRadio.GetRadioSpinel(); }

#if OPENTHREAD_POSIX_CONFIG_RCP_CAPS_DIAG_ENABLE
ot::Posix::RcpCapsDiag &GetRcpCapsDiag(void) { return sRadio.GetRcpCapsDiag(); }
#endif

void platformRadioDeinit(void) { sRadio.Deinit(); }

void platformRadioHandleStateChange(otInstance *aInstance, otChangedFlags aFlags)
{
    if (OT_CHANGED_THREAD_NETIF_STATE & aFlags)
    {
        GetRadioSpinel().SetTimeSyncState(otIp6IsEnabled(aInstance));
    }
}

void otPlatRadioGetIeeeEui64(otInstance *aInstance, uint8_t *aIeeeEui64)
{
    OT_UNUSED_VARIABLE(aInstance);
    SuccessOrDie(GetRadioSpinel().GetIeeeEui64(aIeeeEui64));
}

void otPlatRadioSetPanId(otInstance *aInstance, uint16_t panid)
{
    OT_UNUSED_VARIABLE(aInstance);
    SuccessOrDie(GetRadioSpinel().SetPanId(panid));
}

void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aAddress)
{
    OT_UNUSED_VARIABLE(aInstance);
    otExtAddress addr;

    for (size_t i = 0; i < sizeof(addr); i++)
    {
        addr.m8[i] = aAddress->m8[sizeof(addr) - 1 - i];
    }

    SuccessOrDie(GetRadioSpinel().SetExtendedAddress(addr));
}

void otPlatRadioSetShortAddress(otInstance *aInstance, uint16_t aAddress)
{
    OT_UNUSED_VARIABLE(aInstance);
    SuccessOrDie(GetRadioSpinel().SetShortAddress(aAddress));
}

void otPlatRadioSetAlternateShortAddress(otInstance *aInstance, uint16_t aAddress)
{
    OT_UNUSED_VARIABLE(aInstance);
    SuccessOrDie(GetRadioSpinel().SetAlternateShortAddress(aAddress));
}

void otPlatRadioSetPromiscuous(otInstance *aInstance, bool aEnable)
{
    OT_UNUSED_VARIABLE(aInstance);
    SuccessOrDie(GetRadioSpinel().SetPromiscuous(aEnable));
}

bool otPlatRadioIsEnabled(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().IsEnabled();
}

otError otPlatRadioEnable(otInstance *aInstance) { return GetRadioSpinel().Enable(aInstance); }

otError otPlatRadioDisable(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().Disable();
}

otError otPlatRadioSleep(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().Sleep();
}

otError otPlatRadioReceive(otInstance *aInstance, uint8_t aChannel)
{
    OT_UNUSED_VARIABLE(aInstance);

    otError error;

    SuccessOrExit(error = GetRadioSpinel().Receive(aChannel));

exit:
    return error;
}

otError otPlatRadioTransmit(otInstance *aInstance, otRadioFrame *aFrame)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().Transmit(*aFrame);
}

otRadioFrame *otPlatRadioGetTransmitBuffer(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return &GetRadioSpinel().GetTransmitFrame();
}

int8_t otPlatRadioGetRssi(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().GetRssi();
}

otRadioCaps otPlatRadioGetCaps(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().GetRadioCaps();
}

const char *otPlatRadioGetVersionString(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().GetVersion();
}

bool otPlatRadioGetPromiscuous(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().IsPromiscuous();
}

void platformRadioUpdateFdSet(otSysMainloopContext *aContext)
{
    uint64_t now      = otPlatTimeGet();
    uint64_t deadline = GetRadioSpinel().GetNextRadioTimeRecalcStart();

    if (GetRadioSpinel().IsTransmitting())
    {
        uint64_t txRadioEndUs = GetRadioSpinel().GetTxRadioEndUs();

        if (txRadioEndUs < deadline)
        {
            deadline = txRadioEndUs;
        }
    }

    if (now < deadline)
    {
        uint64_t remain = deadline - now;

        if (remain < (static_cast<uint64_t>(aContext->mTimeout.tv_sec) * OT_US_PER_S +
                      static_cast<uint64_t>(aContext->mTimeout.tv_usec)))
        {
            aContext->mTimeout.tv_sec  = static_cast<time_t>(remain / OT_US_PER_S);
            aContext->mTimeout.tv_usec = static_cast<suseconds_t>(remain % OT_US_PER_S);
        }
    }
    else
    {
        aContext->mTimeout.tv_sec  = 0;
        aContext->mTimeout.tv_usec = 0;
    }

    if (GetRadioSpinel().IsTransmitDone())
    {
        aContext->mTimeout.tv_sec  = 0;
        aContext->mTimeout.tv_usec = 0;
    }
}

#if OPENTHREAD_POSIX_VIRTUAL_TIME
void virtualTimeRadioProcess(otInstance *aInstance, const struct VirtualTimeEvent *aEvent)
{
    OT_UNUSED_VARIABLE(aInstance);
    GetRadioSpinel().Process(aEvent);
}
#else
void platformRadioProcess(otInstance *aInstance, const otSysMainloopContext *aContext)
{
    OT_UNUSED_VARIABLE(aInstance);

    GetRadioSpinel().Process(aContext);
}
#endif // OPENTHREAD_POSIX_VIRTUAL_TIME

void otPlatRadioEnableSrcMatch(otInstance *aInstance, bool aEnable)
{
    OT_UNUSED_VARIABLE(aInstance);
    SuccessOrDie(GetRadioSpinel().EnableSrcMatch(aEnable));
}

otError otPlatRadioAddSrcMatchShortEntry(otInstance *aInstance, uint16_t aShortAddress)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().AddSrcMatchShortEntry(aShortAddress);
}

otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
{
    OT_UNUSED_VARIABLE(aInstance);
    otExtAddress addr;

    for (size_t i = 0; i < sizeof(addr); i++)
    {
        addr.m8[i] = aExtAddress->m8[sizeof(addr) - 1 - i];
    }

    return GetRadioSpinel().AddSrcMatchExtEntry(addr);
}

otError otPlatRadioClearSrcMatchShortEntry(otInstance *aInstance, uint16_t aShortAddress)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().ClearSrcMatchShortEntry(aShortAddress);
}

otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
{
    OT_UNUSED_VARIABLE(aInstance);
    otExtAddress addr;

    for (size_t i = 0; i < sizeof(addr); i++)
    {
        addr.m8[i] = aExtAddress->m8[sizeof(addr) - 1 - i];
    }

    return GetRadioSpinel().ClearSrcMatchExtEntry(addr);
}

void otPlatRadioClearSrcMatchShortEntries(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    SuccessOrDie(GetRadioSpinel().ClearSrcMatchShortEntries());
}

void otPlatRadioClearSrcMatchExtEntries(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    SuccessOrDie(GetRadioSpinel().ClearSrcMatchExtEntries());
}

otError otPlatRadioEnergyScan(otInstance *aInstance, uint8_t aScanChannel, uint16_t aScanDuration)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().EnergyScan(aScanChannel, aScanDuration);
}

otError otPlatRadioGetTransmitPower(otInstance *aInstance, int8_t *aPower)
{
    OT_UNUSED_VARIABLE(aInstance);
    assert(aPower != nullptr);
    return GetRadioSpinel().GetTransmitPower(*aPower);
}

otError otPlatRadioSetTransmitPower(otInstance *aInstance, int8_t aPower)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().SetTransmitPower(aPower);
}

otError otPlatRadioGetCcaEnergyDetectThreshold(otInstance *aInstance, int8_t *aThreshold)
{
    OT_UNUSED_VARIABLE(aInstance);
    assert(aThreshold != nullptr);
    return GetRadioSpinel().GetCcaEnergyDetectThreshold(*aThreshold);
}

otError otPlatRadioSetCcaEnergyDetectThreshold(otInstance *aInstance, int8_t aThreshold)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().SetCcaEnergyDetectThreshold(aThreshold);
}

otError otPlatRadioGetFemLnaGain(otInstance *aInstance, int8_t *aGain)
{
    OT_UNUSED_VARIABLE(aInstance);
    assert(aGain != nullptr);
    return GetRadioSpinel().GetFemLnaGain(*aGain);
}

otError otPlatRadioSetFemLnaGain(otInstance *aInstance, int8_t aGain)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().SetFemLnaGain(aGain);
}

int8_t otPlatRadioGetReceiveSensitivity(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().GetReceiveSensitivity();
}

#if OPENTHREAD_CONFIG_PLATFORM_RADIO_COEX_ENABLE
otError otPlatRadioSetCoexEnabled(otInstance *aInstance, bool aEnabled)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().SetCoexEnabled(aEnabled);
}

bool otPlatRadioIsCoexEnabled(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().IsCoexEnabled();
}

otError otPlatRadioGetCoexMetrics(otInstance *aInstance, otRadioCoexMetrics *aCoexMetrics)
{
    OT_UNUSED_VARIABLE(aInstance);

    otError error = OT_ERROR_NONE;

    VerifyOrExit(aCoexMetrics != nullptr, error = OT_ERROR_INVALID_ARGS);

    error = GetRadioSpinel().GetCoexMetrics(*aCoexMetrics);

exit:
    return error;
}
#endif

#if OPENTHREAD_CONFIG_DIAG_ENABLE
static otPlatDiagOutputCallback sDiagOutputCallback  = nullptr;
static void                    *sDiagCallbackContext = nullptr;
static char                    *sDiagOutput          = nullptr;
static uint16_t                 sDiagOutputLen       = 0;

static void handleDiagOutput(const char *aFormat, va_list aArguments, void *aContext)
    OT_TOOL_PRINTF_STYLE_FORMAT_ARG_CHECK(1, 0);

static void handleDiagOutput(const char *aFormat, va_list aArguments, void *aContext)
{
    OT_UNUSED_VARIABLE(aContext);
    int charsWritten;

    VerifyOrExit((sDiagOutput != nullptr) && (sDiagOutputLen > 0));
    charsWritten = vsnprintf(sDiagOutput, sDiagOutputLen, aFormat, aArguments);
    VerifyOrExit(charsWritten > 0);
    charsWritten = (sDiagOutputLen <= charsWritten) ? sDiagOutputLen : charsWritten;
    sDiagOutput += charsWritten;
    sDiagOutputLen -= charsWritten;

exit:
    return;
}

static void setDiagOutput(char *aOutput, size_t aSize)
{
    sDiagOutput    = aOutput;
    sDiagOutputLen = static_cast<uint16_t>(aSize);
    GetRadioSpinel().SetDiagOutputCallback(handleDiagOutput, nullptr);
}

static void freeDiagOutput(void)
{
    sDiagOutput    = nullptr;
    sDiagOutputLen = 0;
    GetRadioSpinel().SetDiagOutputCallback(sDiagOutputCallback, sDiagCallbackContext);
}

void otPlatDiagSetOutputCallback(otInstance *aInstance, otPlatDiagOutputCallback aCallback, void *aContext)
{
    OT_UNUSED_VARIABLE(aInstance);

    sDiagOutputCallback  = aCallback;
    sDiagCallbackContext = aContext;

    GetRadioSpinel().SetDiagOutputCallback(aCallback, aContext);
#if OPENTHREAD_POSIX_CONFIG_RCP_CAPS_DIAG_ENABLE
    GetRcpCapsDiag().SetDiagOutputCallback(aCallback, aContext);
#endif
}

otError otPlatDiagProcess(otInstance *aInstance, uint8_t aArgsLength, char *aArgs[])
{
    OT_UNUSED_VARIABLE(aInstance);
    otError error                                            = OT_ERROR_NONE;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE] = {'\0'};
    char   *cur                                              = cmd;
    char   *end                                              = cmd + sizeof(cmd);

#if OPENTHREAD_POSIX_CONFIG_RCP_CAPS_DIAG_ENABLE
    if (strcmp(aArgs[0], "rcpcaps") == 0)
    {
        error = GetRcpCapsDiag().DiagProcess(aArgs, aArgsLength);
        ExitNow();
    }
#endif

    if (strcmp(aArgs[0], "radiospinel") == 0)
    {
        error = GetRadioSpinel().RadioSpinelDiagProcess(aArgs, aArgsLength);
        ExitNow();
    }

    for (uint8_t index = 0; (index < aArgsLength) && (cur < end); index++)
    {
        cur += snprintf(cur, static_cast<size_t>(end - cur), "%s ", aArgs[index]);
    }

    // deliver the platform specific diags commands to radio only ncp.
    error = GetRadioSpinel().PlatDiagProcess(cmd);

exit:
    return error;
}

void otPlatDiagModeSet(bool aMode)
{
    SuccessOrExit(GetRadioSpinel().PlatDiagProcess(aMode ? "start" : "stop"));
    GetRadioSpinel().SetDiagEnabled(aMode);

exit:
    return;
}

bool otPlatDiagModeGet(void) { return GetRadioSpinel().IsDiagEnabled(); }

void otPlatDiagTxPowerSet(int8_t aTxPower)
{
    char cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];

    snprintf(cmd, sizeof(cmd), "power %d", aTxPower);
    SuccessOrExit(GetRadioSpinel().PlatDiagProcess(cmd));

exit:
    return;
}

void otPlatDiagChannelSet(uint8_t aChannel)
{
    char cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];

    snprintf(cmd, sizeof(cmd), "channel %d", aChannel);
    SuccessOrExit(GetRadioSpinel().PlatDiagProcess(cmd));

exit:
    return;
}

otError otPlatDiagGpioSet(uint32_t aGpio, bool aValue)
{
    otError error;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];

    snprintf(cmd, sizeof(cmd), "gpio set %d %d", aGpio, aValue);
    SuccessOrExit(error = GetRadioSpinel().PlatDiagProcess(cmd));

exit:
    return error;
}

otError otPlatDiagGpioGet(uint32_t aGpio, bool *aValue)
{
    otError error;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];
    char    output[OPENTHREAD_CONFIG_DIAG_OUTPUT_BUFFER_SIZE];
    char   *str;

    setDiagOutput(output, sizeof(output));

    snprintf(cmd, sizeof(cmd), "gpio get %d", aGpio);
    SuccessOrExit(error = GetRadioSpinel().PlatDiagProcess(cmd));
    VerifyOrExit((str = strtok(output, "\r")) != nullptr, error = OT_ERROR_FAILED);
    *aValue = static_cast<bool>(atoi(str));

exit:
    freeDiagOutput();

    return error;
}

otError otPlatDiagGpioSetMode(uint32_t aGpio, otGpioMode aMode)
{
    otError error;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];

    snprintf(cmd, sizeof(cmd), "gpio mode %d %s", aGpio, aMode == OT_GPIO_MODE_INPUT ? "in" : "out");
    SuccessOrExit(error = GetRadioSpinel().PlatDiagProcess(cmd));

exit:
    return error;
}

otError otPlatDiagGpioGetMode(uint32_t aGpio, otGpioMode *aMode)
{
    otError error;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];
    char    output[OPENTHREAD_CONFIG_DIAG_OUTPUT_BUFFER_SIZE];
    char   *str;

    setDiagOutput(output, sizeof(output));

    snprintf(cmd, sizeof(cmd), "gpio mode %d", aGpio);
    SuccessOrExit(error = GetRadioSpinel().PlatDiagProcess(cmd));
    VerifyOrExit((str = strtok(output, "\r")) != nullptr, error = OT_ERROR_FAILED);

    if (strcmp(str, "in") == 0)
    {
        *aMode = OT_GPIO_MODE_INPUT;
    }
    else if (strcmp(str, "out") == 0)
    {
        *aMode = OT_GPIO_MODE_OUTPUT;
    }
    else
    {
        error = OT_ERROR_FAILED;
    }

exit:
    freeDiagOutput();

    return error;
}

otError otPlatDiagRadioGetPowerSettings(otInstance *aInstance,
                                        uint8_t     aChannel,
                                        int16_t    *aTargetPower,
                                        int16_t    *aActualPower,
                                        uint8_t    *aRawPowerSetting,
                                        uint16_t   *aRawPowerSettingLength)
{
    OT_UNUSED_VARIABLE(aInstance);
    static constexpr uint16_t kRawPowerStringSize = OPENTHREAD_CONFIG_POWER_CALIBRATION_RAW_POWER_SETTING_SIZE * 2 + 1;

    otError error;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];
    char    output[OPENTHREAD_CONFIG_DIAG_OUTPUT_BUFFER_SIZE];
    int     targetPower;
    int     actualPower;
    char    rawPowerSetting[OPENTHREAD_CONFIG_DIAG_OUTPUT_BUFFER_SIZE];

    static_assert(OPENTHREAD_CONFIG_DIAG_OUTPUT_BUFFER_SIZE >= kRawPowerStringSize, "RawPowerSetting too large");

    assert((aTargetPower != nullptr) && (aActualPower != nullptr) && (aRawPowerSetting != nullptr) &&
           (aRawPowerSettingLength != nullptr));

    setDiagOutput(output, sizeof(output));

    snprintf(cmd, sizeof(cmd), "powersettings %d", aChannel);
    SuccessOrExit(error = GetRadioSpinel().PlatDiagProcess(cmd));
    output[sizeof(output) - 1] = ot::kNullChar;
    VerifyOrExit(sscanf(output, "TargetPower(0.01dBm): %d\r\nActualPower(0.01dBm): %d\r\nRawPowerSetting: %s\r\n",
                        &targetPower, &actualPower, rawPowerSetting) == 3,
                 error = OT_ERROR_FAILED);
    SuccessOrExit(
        error = ot::Utils::CmdLineParser::ParseAsHexString(rawPowerSetting, *aRawPowerSettingLength, aRawPowerSetting));
    *aTargetPower = static_cast<int16_t>(targetPower);
    *aActualPower = static_cast<int16_t>(actualPower);

exit:
    freeDiagOutput();

    return error;
}

otError otPlatDiagRadioSetRawPowerSetting(otInstance    *aInstance,
                                          const uint8_t *aRawPowerSetting,
                                          uint16_t       aRawPowerSettingLength)
{
    OT_UNUSED_VARIABLE(aInstance);

    otError error;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];
    int     nbytes;

    assert(aRawPowerSetting != nullptr);

    nbytes = snprintf(cmd, sizeof(cmd), "rawpowersetting ");

    for (uint16_t i = 0; i < aRawPowerSettingLength; i++)
    {
        nbytes += snprintf(cmd + nbytes, sizeof(cmd) - static_cast<size_t>(nbytes), "%02x", aRawPowerSetting[i]);
        VerifyOrExit(nbytes < static_cast<int>(sizeof(cmd)), error = OT_ERROR_INVALID_ARGS);
    }

    SuccessOrExit(error = GetRadioSpinel().PlatDiagProcess(cmd));

exit:
    return error;
}

otError otPlatDiagRadioGetRawPowerSetting(otInstance *aInstance,
                                          uint8_t    *aRawPowerSetting,
                                          uint16_t   *aRawPowerSettingLength)
{
    OT_UNUSED_VARIABLE(aInstance);
    otError error;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];
    char    output[OPENTHREAD_CONFIG_DIAG_OUTPUT_BUFFER_SIZE];
    char   *str;

    assert((aRawPowerSetting != nullptr) && (aRawPowerSettingLength != nullptr));

    setDiagOutput(output, sizeof(output));

    snprintf(cmd, sizeof(cmd), "rawpowersetting");
    SuccessOrExit(error = GetRadioSpinel().PlatDiagProcess(cmd));
    VerifyOrExit((str = strtok(output, "\r")) != nullptr, error = OT_ERROR_FAILED);
    SuccessOrExit(error = ot::Utils::CmdLineParser::ParseAsHexString(str, *aRawPowerSettingLength, aRawPowerSetting));

exit:
    freeDiagOutput();

    return error;
}

otError otPlatDiagRadioRawPowerSettingEnable(otInstance *aInstance, bool aEnable)
{
    OT_UNUSED_VARIABLE(aInstance);

    otError error;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];

    snprintf(cmd, sizeof(cmd), "rawpowersetting %s", aEnable ? "enable" : "disable");
    SuccessOrExit(error = GetRadioSpinel().PlatDiagProcess(cmd));

exit:
    return error;
}

otError otPlatDiagRadioTransmitCarrier(otInstance *aInstance, bool aEnable)
{
    OT_UNUSED_VARIABLE(aInstance);

    otError error;
    char    cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];

    snprintf(cmd, sizeof(cmd), "cw %s", aEnable ? "start" : "stop");
    SuccessOrExit(error = GetRadioSpinel().PlatDiagProcess(cmd));

exit:
    return error;
}

otError otPlatDiagRadioTransmitStream(otInstance *aInstance, bool aEnable)
{
    OT_UNUSED_VARIABLE(aInstance);

    char cmd[OPENTHREAD_CONFIG_DIAG_CMD_LINE_BUFFER_SIZE];

    snprintf(cmd, sizeof(cmd), "stream %s", aEnable ? "start" : "stop");
    return GetRadioSpinel().PlatDiagProcess(cmd);
}

void otPlatDiagRadioReceived(otInstance *aInstance, otRadioFrame *aFrame, otError aError)
{
    OT_UNUSED_VARIABLE(aInstance);
    OT_UNUSED_VARIABLE(aFrame);
    OT_UNUSED_VARIABLE(aError);
}

void otPlatDiagAlarmCallback(otInstance *aInstance) { OT_UNUSED_VARIABLE(aInstance); }
#endif // OPENTHREAD_CONFIG_DIAG_ENABLE

uint32_t otPlatRadioGetSupportedChannelMask(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);

    uint32_t channelMask;

#if OPENTHREAD_POSIX_CONFIG_CONFIGURATION_FILE_ENABLE
    if (sConfig.IsValid())
    {
        channelMask = sConfig.GetSupportedChannelMask();
    }
    else
#endif
    {
        channelMask = GetRadioSpinel().GetRadioChannelMask(false);
    }

    return channelMask;
}

uint32_t otPlatRadioGetPreferredChannelMask(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);

    uint32_t channelMask;

#if OPENTHREAD_POSIX_CONFIG_CONFIGURATION_FILE_ENABLE
    if (sConfig.IsValid())
    {
        channelMask = sConfig.GetPreferredChannelMask();
    }
    else
#endif
    {
        channelMask = GetRadioSpinel().GetRadioChannelMask(true);
    }

    return channelMask;
}

otRadioState otPlatRadioGetState(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().GetState();
}

void otPlatRadioSetMacKey(otInstance             *aInstance,
                          uint8_t                 aKeyIdMode,
                          uint8_t                 aKeyId,
                          const otMacKeyMaterial *aPrevKey,
                          const otMacKeyMaterial *aCurrKey,
                          const otMacKeyMaterial *aNextKey,
                          otRadioKeyType          aKeyType)
{
    SuccessOrDie(GetRadioSpinel().SetMacKey(aKeyIdMode, aKeyId, aPrevKey, aCurrKey, aNextKey));
    OT_UNUSED_VARIABLE(aInstance);
    OT_UNUSED_VARIABLE(aKeyType);
}

void otPlatRadioSetMacFrameCounter(otInstance *aInstance, uint32_t aMacFrameCounter)
{
    SuccessOrDie(GetRadioSpinel().SetMacFrameCounter(aMacFrameCounter, /* aSetIfLarger */ false));
    OT_UNUSED_VARIABLE(aInstance);
}

void otPlatRadioSetMacFrameCounterIfLarger(otInstance *aInstance, uint32_t aMacFrameCounter)
{
    SuccessOrDie(GetRadioSpinel().SetMacFrameCounter(aMacFrameCounter, /* aSetIfLarger */ true));
    OT_UNUSED_VARIABLE(aInstance);
}

uint64_t otPlatRadioGetNow(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().GetNow();
}

uint32_t otPlatRadioGetBusSpeed(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().GetBusSpeed();
}

uint32_t otPlatRadioGetBusLatency(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().GetBusLatency();
}

#if OPENTHREAD_CONFIG_MAC_CSL_RECEIVER_ENABLE || OPENTHREAD_CONFIG_MAC_CSL_TRANSMITTER_ENABLE
uint8_t otPlatRadioGetCslAccuracy(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);

    return GetRadioSpinel().GetCslAccuracy();
}
#endif

#if OPENTHREAD_CONFIG_MAC_CSL_TRANSMITTER_ENABLE
uint8_t otPlatRadioGetCslUncertainty(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);

    return GetRadioSpinel().GetCslUncertainty();
}
#endif

otError otPlatRadioSetChannelMaxTransmitPower(otInstance *aInstance, uint8_t aChannel, int8_t aMaxPower)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().SetChannelMaxTransmitPower(aChannel, aMaxPower);
}

#if OPENTHREAD_CONFIG_PLATFORM_POWER_CALIBRATION_ENABLE
otError otPlatRadioAddCalibratedPower(otInstance    *aInstance,
                                      uint8_t        aChannel,
                                      int16_t        aActualPower,
                                      const uint8_t *aRawPowerSetting,
                                      uint16_t       aRawPowerSettingLength)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().AddCalibratedPower(aChannel, aActualPower, aRawPowerSetting, aRawPowerSettingLength);
}

otError otPlatRadioClearCalibratedPowers(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().ClearCalibratedPowers();
}

otError otPlatRadioSetChannelTargetPower(otInstance *aInstance, uint8_t aChannel, int16_t aTargetPower)
{
    OT_UNUSED_VARIABLE(aInstance);
    return GetRadioSpinel().SetChannelTargetPower(aChannel, aTargetPower);
}
#endif

otError otPlatRadioSetRegion(otInstance *aInstance, uint16_t aRegionCode)
{
    OT_UNUSED_VARIABLE(aInstance);

    otError error;

#if OPENTHREAD_POSIX_CONFIG_CONFIGURATION_FILE_ENABLE
    if (sConfig.IsValid())
    {
        error = sConfig.SetRegion(aRegionCode);
    }
    else
#endif
    {
        error = GetRadioSpinel().SetRadioRegion(aRegionCode);
    }

    return error;
}

otError otPlatRadioGetRegion(otInstance *aInstance, uint16_t *aRegionCode)
{
    OT_UNUSED_VARIABLE(aInstance);

    otError error;

#if OPENTHREAD_POSIX_CONFIG_CONFIGURATION_FILE_ENABLE
    if (sConfig.IsValid())
    {
        *aRegionCode = sConfig.GetRegion();
        error        = OT_ERROR_NONE;
    }
    else
#endif
    {
        error = GetRadioSpinel().GetRadioRegion(aRegionCode);
    }

    return error;
}

#if OPENTHREAD_CONFIG_MLE_LINK_METRICS_SUBJECT_ENABLE
otError otPlatRadioConfigureEnhAckProbing(otInstance          *aInstance,
                                          otLinkMetrics        aLinkMetrics,
                                          const otShortAddress aShortAddress,
                                          const otExtAddress  *aExtAddress)
{
    OT_UNUSED_VARIABLE(aInstance);

    return GetRadioSpinel().ConfigureEnhAckProbing(aLinkMetrics, aShortAddress, *aExtAddress);
}
#endif

otError otPlatRadioReceiveAt(otInstance *aInstance, uint8_t aChannel, uint32_t aStart, uint32_t aDuration)
{
    OT_UNUSED_VARIABLE(aInstance);
    OT_UNUSED_VARIABLE(aChannel);
    OT_UNUSED_VARIABLE(aStart);
    OT_UNUSED_VARIABLE(aDuration);
    return OT_ERROR_NOT_IMPLEMENTED;
}

#if OPENTHREAD_CONFIG_PLATFORM_BOOTLOADER_MODE_ENABLE
otError otPlatResetToBootloader(otInstance *aInstance)
{
    OT_UNUSED_VARIABLE(aInstance);

    return GetRadioSpinel().SendReset(SPINEL_RESET_BOOTLOADER);
}
#endif

const otRadioSpinelMetrics *otSysGetRadioSpinelMetrics(void) { return &GetRadioSpinel().GetRadioSpinelMetrics(); }

const otRcpInterfaceMetrics *otSysGetRcpInterfaceMetrics(void)
{
    return sRadio.GetSpinelInterface().GetRcpInterfaceMetrics();
}

#if OPENTHREAD_SPINEL_CONFIG_RCP_RESTORATION_MAX_COUNT > 0
void otSysSetRcpRestorationEnabled(bool aEnabled) { return GetRadioSpinel().SetRcpRestorationEnabled(aEnabled); }
#endif
