#include "platform.hpp"

#include "common/utils.hpp"
#include "event_parser.hpp"
#include "pdr_numeric_effecter.hpp"
#include "pdr_state_effecter.hpp"
#include "platform_numeric_effecter.hpp"
#include "platform_state_effecter.hpp"

namespace pldm
{
namespace responder
{
namespace platform
{

using InternalFailure =
    sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;

static const Json empty{};

using EventEntryMap = std::map<EventEntry, DBusInfo>;

const EventEntryMap eventEntryMap = {
    {
        0x01010007, // SensorID for VMI Port 0 ipv4 = 7, SensorOffset for the
                    // State Set ID 15 = 1 & PLDM State Set Enumeration List = 1
                    // (Valid Configuration)
        {"/xyz/openbmc_project/network/vmi/intf0/ipv4/addr0",
         "xyz.openbmc_project.Object.Enable", "Enabled", "bool", true},
    },
    {
        0x02010007, // SensorID for VMI Port 0 ipv4 = 7, SensorOffset for the
                    // State Set ID 15 = 1 & PLDM State Set Enumeration List = 2
                    // (Invalid Configuration)
        {"/xyz/openbmc_project/network/vmi/intf0/ipv4/addr0",
         "xyz.openbmc_project.Object.Enable", "Enabled", "bool", false},
    },
    {
        0x01010008, // SensorID for VMI Port 1 ipv4 = 8, SensorOffset for the
                    // State Set ID 15 = 1 & PLDM State Set Enumeration List = 1
                    // (Valid Configuration)
        {"/xyz/openbmc_project/network/vmi/intf1/ipv4/addr0",
         "xyz.openbmc_project.Object.Enable", "Enabled", "bool", true},
    },
    {
        0x02010008, // SensorID for VMI Port 1 ipv4 = 8, SensorOffset for the
                    // State Set ID 15 = 1 & PLDM State Set Enumeration List = 2
                    // (Invalid Configuration)
        {"/xyz/openbmc_project/network/vmi/intf1/ipv4/addr0",
         "xyz.openbmc_project.Object.Enable", "Enabled", "bool", false},
    }};

void Handler::addDbusObjMaps(
    uint16_t effecterId,
    std::tuple<pdr_utils::DbusMappings, pdr_utils::DbusValMaps> dbusObj)
{
    dbusObjMaps.emplace(effecterId, dbusObj);
}

const std::tuple<pdr_utils::DbusMappings, pdr_utils::DbusValMaps>&
    Handler::getDbusObjMaps(uint16_t effecterId) const
{
    return dbusObjMaps.at(effecterId);
}

void Handler::generate(const std::string& dir, Repo& repo)
{
    // A map of PDR type to a lambda that handles creation of that PDR type.
    // The lambda essentially would parse the platform specific PDR JSONs to
    // generate the PDR structures. This function iterates through the map to
    // invoke all lambdas, so that all PDR types can be created.

    const std::map<Type, generatePDR> generateHandlers = {
        {PLDM_STATE_EFFECTER_PDR,
         [this](const auto& json, RepoInterface& repo) {
             pdr_state_effecter::generateStateEffecterPDR<Handler>(json, *this,
                                                                   repo);
         }},
        {PLDM_NUMERIC_EFFECTER_PDR,
         [this](const auto& json, RepoInterface& repo) {
             pdr_numeric_effecter::generateNumericEffecterPDR<Handler>(
                 json, *this, repo);
         }}};

    Type pdrType{};
    for (const auto& dirEntry : fs::directory_iterator(dir))
    {
        try
        {
            auto json = readJson(dirEntry.path().string());
            if (!json.empty())
            {
                auto effecterPDRs = json.value("effecterPDRs", empty);
                for (const auto& effecter : effecterPDRs)
                {
                    pdrType = effecter.value("pdrType", 0);
                    generateHandlers.at(pdrType)(effecter, repo);
                }
            }
        }
        catch (const InternalFailure& e)
        {
            std::cerr << "PDR config directory does not exist or empty, TYPE= "
                      << pdrType << "PATH= " << dirEntry
                      << " ERROR=" << e.what() << "\n";
        }
        catch (const Json::exception& e)
        {
            std::cerr << "Failed parsing PDR JSON file, TYPE= " << pdrType
                      << " ERROR=" << e.what() << "\n";
            pldm::utils::reportError(
                "xyz.openbmc_project.bmc.pldm.InternalFailure");
        }
        catch (const std::exception& e)
        {
            std::cerr << "Failed parsing PDR JSON file, TYPE= " << pdrType
                      << " ERROR=" << e.what() << "\n";
            pldm::utils::reportError(
                "xyz.openbmc_project.bmc.pldm.InternalFailure");
        }
    }
}

Response Handler::getPDR(const pldm_msg* request, size_t payloadLength)
{
    // Build FRU table if not built, since entity association PDR's are built
    // when the FRU table is constructed.
    if (fruHandler)
    {
        fruHandler->buildFRUTable();
    }

    Response response(sizeof(pldm_msg_hdr) + PLDM_GET_PDR_MIN_RESP_BYTES, 0);
    auto responsePtr = reinterpret_cast<pldm_msg*>(response.data());

    if (payloadLength != PLDM_GET_PDR_REQ_BYTES)
    {
        return CmdHandler::ccOnlyResponse(request, PLDM_ERROR_INVALID_LENGTH);
    }

    uint32_t recordHandle{};
    uint32_t dataTransferHandle{};
    uint8_t transferOpFlag{};
    uint16_t reqSizeBytes{};
    uint16_t recordChangeNum{};

    auto rc = decode_get_pdr_req(request, payloadLength, &recordHandle,
                                 &dataTransferHandle, &transferOpFlag,
                                 &reqSizeBytes, &recordChangeNum);
    if (rc != PLDM_SUCCESS)
    {
        return CmdHandler::ccOnlyResponse(request, rc);
    }

    uint16_t respSizeBytes{};
    uint8_t* recordData = nullptr;
    try
    {
        pdr_utils::PdrEntry e;
        auto record = pdr::getRecordByHandle(pdrRepo, recordHandle, e);
        if (record == NULL)
        {
            return CmdHandler::ccOnlyResponse(
                request, PLDM_PLATFORM_INVALID_RECORD_HANDLE);
        }

        if (reqSizeBytes)
        {
            respSizeBytes = e.size;
            if (respSizeBytes > reqSizeBytes)
            {
                respSizeBytes = reqSizeBytes;
            }
            recordData = e.data;
        }
        response.resize(sizeof(pldm_msg_hdr) + PLDM_GET_PDR_MIN_RESP_BYTES +
                            respSizeBytes,
                        0);
        responsePtr = reinterpret_cast<pldm_msg*>(response.data());
        rc = encode_get_pdr_resp(
            request->hdr.instance_id, PLDM_SUCCESS, e.handle.nextRecordHandle,
            0, PLDM_START_AND_END, respSizeBytes, recordData, 0, responsePtr);
        if (rc != PLDM_SUCCESS)
        {
            return ccOnlyResponse(request, rc);
        }
    }
    catch (const std::exception& e)
    {
        std::cerr << "Error accessing PDR, HANDLE=" << recordHandle
                  << " ERROR=" << e.what() << "\n";
        return CmdHandler::ccOnlyResponse(request, PLDM_ERROR);
    }
    return response;
}

Response Handler::setStateEffecterStates(const pldm_msg* request,
                                         size_t payloadLength)
{
    Response response(
        sizeof(pldm_msg_hdr) + PLDM_SET_STATE_EFFECTER_STATES_RESP_BYTES, 0);
    auto responsePtr = reinterpret_cast<pldm_msg*>(response.data());
    uint16_t effecterId;
    uint8_t compEffecterCnt;
    constexpr auto maxCompositeEffecterCnt = 8;
    std::vector<set_effecter_state_field> stateField(maxCompositeEffecterCnt,
                                                     {0, 0});

    if ((payloadLength > PLDM_SET_STATE_EFFECTER_STATES_REQ_BYTES) ||
        (payloadLength < sizeof(effecterId) + sizeof(compEffecterCnt) +
                             sizeof(set_effecter_state_field)))
    {
        return CmdHandler::ccOnlyResponse(request, PLDM_ERROR_INVALID_LENGTH);
    }

    int rc = decode_set_state_effecter_states_req(request, payloadLength,
                                                  &effecterId, &compEffecterCnt,
                                                  stateField.data());

    if (rc != PLDM_SUCCESS)
    {
        return CmdHandler::ccOnlyResponse(request, rc);
    }

    stateField.resize(compEffecterCnt);
    const pldm::utils::DBusHandler dBusIntf;
    rc = platform_state_effecter::setStateEffecterStatesHandler<
        pldm::utils::DBusHandler, Handler>(dBusIntf, *this, effecterId,
                                           stateField);
    if (rc != PLDM_SUCCESS)
    {
        return CmdHandler::ccOnlyResponse(request, rc);
    }

    rc = encode_set_state_effecter_states_resp(request->hdr.instance_id, rc,
                                               responsePtr);
    if (rc != PLDM_SUCCESS)
    {
        return ccOnlyResponse(request, rc);
    }

    return response;
}

Response Handler::platformEventMessage(const pldm_msg* request,
                                       size_t payloadLength)
{
    uint8_t formatVersion{};
    uint8_t tid{};
    uint8_t eventClass{};
    size_t offset{};

    auto rc = decode_platform_event_message_req(
        request, payloadLength, &formatVersion, &tid, &eventClass, &offset);
    if (rc != PLDM_SUCCESS)
    {
        return CmdHandler::ccOnlyResponse(request, rc);
    }

    try
    {
        const auto& handlers = eventHandlers.at(eventClass);
        for (const auto& handler : handlers)
        {
            auto rc =
                handler(request, payloadLength, formatVersion, tid, offset);
            if (rc != PLDM_SUCCESS)
            {
                return CmdHandler::ccOnlyResponse(request, rc);
            }
        }
    }
    catch (const std::out_of_range& e)
    {
        return CmdHandler::ccOnlyResponse(request, PLDM_ERROR_INVALID_DATA);
    }

    Response response(
        sizeof(pldm_msg_hdr) + PLDM_PLATFORM_EVENT_MESSAGE_RESP_BYTES, 0);
    auto responsePtr = reinterpret_cast<pldm_msg*>(response.data());

    rc = encode_platform_event_message_resp(request->hdr.instance_id, rc,
                                            PLDM_EVENT_NO_LOGGING, responsePtr);
    if (rc != PLDM_SUCCESS)
    {
        return ccOnlyResponse(request, rc);
    }

    return response;
}

int Handler::sensorEvent(const pldm_msg* request, size_t payloadLength,
                         uint8_t /*formatVersion*/, uint8_t tid,
                         size_t eventDataOffset)
{
    uint16_t sensorId{};
    uint8_t eventClass{};
    size_t eventClassDataOffset{};
    auto eventData =
        reinterpret_cast<const uint8_t*>(request->payload) + eventDataOffset;
    auto eventDataSize = payloadLength - eventDataOffset;

    auto rc = decode_sensor_event_data(eventData, eventDataSize, &sensorId,
                                       &eventClass, &eventClassDataOffset);
    if (rc != PLDM_SUCCESS)
    {
        return rc;
    }

    auto eventClassData = reinterpret_cast<const uint8_t*>(request->payload) +
                          eventDataOffset + eventClassDataOffset;
    auto eventClassDataSize =
        payloadLength - eventDataOffset - eventClassDataOffset;

    if (eventClass == PLDM_STATE_SENSOR_STATE)
    {
        uint8_t sensorOffset{};
        uint8_t eventState{};
        uint8_t previousEventState{};

        rc = decode_state_sensor_data(eventClassData, eventClassDataSize,
                                      &sensorOffset, &eventState,
                                      &previousEventState);
        if (rc != PLDM_SUCCESS)
        {
            return PLDM_ERROR;
        }

        // Handle PLDM events for which PDR is not available, setSensorEventData
        // will return PLDM_ERROR_INVALID_DATA if the sensorID is not found in
        // the hardcoded sensor list.
        rc = setSensorEventData(sensorId, sensorOffset, eventState);
        if (rc != PLDM_ERROR_INVALID_DATA)
        {
            return rc;
        }

        // If there are no HOST PDR's, there is no further action
        if (hostPDRHandler == NULL)
        {
            return PLDM_SUCCESS;
        }

        // Handle PLDM events for which PDR is available
        SensorEntry sensorEntry{tid, sensorId};
        try
        {
            const auto& [entityInfo, compositeSensorStates] =
                hostPDRHandler->lookupSensorInfo(sensorEntry);
            if (sensorOffset >= compositeSensorStates.size())
            {
                return PLDM_ERROR_INVALID_DATA;
            }

            const auto& possibleStates = compositeSensorStates[sensorOffset];
            if (possibleStates.find(eventState) == possibleStates.end())
            {
                return PLDM_ERROR_INVALID_DATA;
            }

            const auto& [containerId, entityType, entityInstance] = entityInfo;
            events::StateSensorEntry stateSensorEntry{
                containerId, entityType, entityInstance, sensorOffset};
            return stateSensorHandler.eventAction(stateSensorEntry, eventState);
        }
        // If there is no mapping for events return PLDM_SUCCESS
        catch (const std::out_of_range& e)
        {
            return PLDM_SUCCESS;
        }
    }
    else
    {
        return PLDM_ERROR_INVALID_DATA;
    }

    return PLDM_SUCCESS;
}

int Handler::setSensorEventData(uint16_t sensorId, uint8_t sensorOffset,
                                uint8_t eventState)
{
    EventEntry eventEntry = ((static_cast<uint32_t>(eventState)) << 24) +
                            ((static_cast<uint32_t>(sensorOffset)) << 16) +
                            sensorId;
    auto iter = eventEntryMap.find(eventEntry);
    if (iter == eventEntryMap.end())
    {
        return PLDM_ERROR_INVALID_DATA;
    }

    const auto& dBusInfo = iter->second;
    try
    {
        pldm::utils::DBusMapping dbusMapping{
            dBusInfo.dBusValues.objectPath, dBusInfo.dBusValues.interface,
            dBusInfo.dBusValues.propertyName, dBusInfo.dBusValues.propertyType};
        pldm::utils::DBusHandler().setDbusProperty(dbusMapping,
                                                   dBusInfo.dBusPropertyValue);
    }
    catch (std::exception& e)
    {
        std::cerr
            << "Error Setting dbus property,SensorID=" << eventEntry
            << "DBusInfo=" << dBusInfo.dBusValues.objectPath
            << dBusInfo.dBusValues.interface << dBusInfo.dBusValues.propertyName
            << "ERROR=" << e.what() << "\n";
        return PLDM_ERROR;
    }
    return PLDM_SUCCESS;
}

int Handler::pldmPDRRepositoryChgEvent(const pldm_msg* request,
                                       size_t payloadLength,
                                       uint8_t /*formatVersion*/,
                                       uint8_t /*tid*/, size_t eventDataOffset)
{
    uint8_t eventDataFormat{};
    uint8_t numberOfChangeRecords{};
    size_t dataOffset{};

    auto eventData =
        reinterpret_cast<const uint8_t*>(request->payload) + eventDataOffset;
    auto eventDataSize = payloadLength - eventDataOffset;

    auto rc = decode_pldm_pdr_repository_chg_event_data(
        eventData, eventDataSize, &eventDataFormat, &numberOfChangeRecords,
        &dataOffset);
    if (rc != PLDM_SUCCESS)
    {
        return rc;
    }

    PDRRecordHandles pdrRecordHandles;
    if (eventDataFormat == FORMAT_IS_PDR_HANDLES)
    {
        uint8_t eventDataOperation{};
        uint8_t numberOfChangeEntries{};

        auto changeRecordData = eventData + dataOffset;
        auto changeRecordDataSize = eventDataSize - dataOffset;

        while (changeRecordDataSize)
        {
            rc = decode_pldm_pdr_repository_change_record_data(
                changeRecordData, changeRecordDataSize, &eventDataOperation,
                &numberOfChangeEntries, &dataOffset);

            if (rc != PLDM_SUCCESS)
            {
                return rc;
            }

            if (eventDataOperation == PLDM_RECORDS_ADDED)
            {
                rc = getPDRRecordHandles(
                    reinterpret_cast<const ChangeEntry*>(changeRecordData +
                                                         dataOffset),
                    changeRecordDataSize - dataOffset,
                    static_cast<size_t>(numberOfChangeEntries),
                    pdrRecordHandles);

                if (rc != PLDM_SUCCESS)
                {
                    return rc;
                }
            }

            changeRecordData +=
                dataOffset + (numberOfChangeEntries * sizeof(ChangeEntry));
            changeRecordDataSize -=
                dataOffset + (numberOfChangeEntries * sizeof(ChangeEntry));
        }

        if (hostPDRHandler && !pdrRecordHandles.empty())
        {
            hostPDRHandler->fetchPDR(std::move(pdrRecordHandles));
        }
    }
    else
    {
        return PLDM_ERROR_INVALID_DATA;
    }

    return PLDM_SUCCESS;
}

int Handler::getPDRRecordHandles(const ChangeEntry* changeEntryData,
                                 size_t changeEntryDataSize,
                                 size_t numberOfChangeEntries,
                                 PDRRecordHandles& pdrRecordHandles)
{
    if (numberOfChangeEntries > (changeEntryDataSize / sizeof(ChangeEntry)))
    {
        return PLDM_ERROR_INVALID_DATA;
    }
    for (size_t i = 0; i < numberOfChangeEntries; i++)
    {
        pdrRecordHandles.push_back(changeEntryData[i]);
    }
    return PLDM_SUCCESS;
}

Response Handler::setNumericEffecterValue(const pldm_msg* request,
                                          size_t payloadLength)
{
    Response response(sizeof(pldm_msg_hdr) +
                      PLDM_SET_NUMERIC_EFFECTER_VALUE_RESP_BYTES);
    uint16_t effecterId{};
    uint8_t effecterDataSize{};
    uint8_t effecterValue[4] = {};

    if ((payloadLength > sizeof(effecterId) + sizeof(effecterDataSize) +
                             sizeof(union_effecter_data_size)) ||
        (payloadLength < sizeof(effecterId) + sizeof(effecterDataSize) + 1))
    {
        return ccOnlyResponse(request, PLDM_ERROR_INVALID_LENGTH);
    }

    int rc = decode_set_numeric_effecter_value_req(
        request, payloadLength, &effecterId, &effecterDataSize,
        reinterpret_cast<uint8_t*>(&effecterValue));

    if (rc == PLDM_SUCCESS)
    {
        const pldm::utils::DBusHandler dBusIntf;
        rc = platform_numeric_effecter::setNumericEffecterValueHandler<
            pldm::utils::DBusHandler, Handler>(dBusIntf, *this, effecterId,
                                               effecterDataSize, effecterValue,
                                               sizeof(effecterValue));
    }

    return ccOnlyResponse(request, rc);
}

} // namespace platform
} // namespace responder
} // namespace pldm