#pragma once

#include "collect_slot_vpd.hpp"
#include "common/utils.hpp"
#include "inband_code_update.hpp"
#include "libpldmresponder/oem_handler.hpp"
#include "libpldmresponder/pdr_utils.hpp"
#include "libpldmresponder/platform.hpp"
#include "requester/handler.hpp"

#include <libpldm/entity.h>
#include <libpldm/oem/ibm/state_set.h>
#include <libpldm/platform.h>

#include <sdbusplus/bus/match.hpp>
#include <sdeventplus/event.hpp>
#include <sdeventplus/utility/timer.hpp>

typedef ibm_oem_pldm_state_set_firmware_update_state_values CodeUpdateState;

namespace pldm
{
namespace responder
{
using ObjectPath = std::string;
using AssociatedEntityMap = std::map<ObjectPath, pldm_entity>;
namespace oem_ibm_platform
{
using AttributeName = std::string;
using AttributeType = std::string;
using ReadonlyStatus = bool;
using DisplayName = std::string;
using Description = std::string;
using MenuPath = std::string;
using CurrentValue = std::variant<int64_t, std::string>;
using DefaultValue = std::variant<int64_t, std::string>;
using OptionString = std::string;
using OptionValue = std::variant<int64_t, std::string>;
using Option = std::vector<std::tuple<OptionString, OptionValue>>;
using BIOSTableObj =
    std::tuple<AttributeType, ReadonlyStatus, DisplayName, Description,
               MenuPath, CurrentValue, DefaultValue, Option>;
using BaseBIOSTable = std::map<AttributeName, BIOSTableObj>;
using PendingObj = std::tuple<AttributeType, CurrentValue>;
using PendingAttributes = std::map<AttributeName, PendingObj>;

constexpr uint16_t ENTITY_INSTANCE_0 = 0;
constexpr uint16_t ENTITY_INSTANCE_1 = 1;

constexpr uint32_t BMC_PDR_START_RANGE = 0x00000000;
constexpr uint32_t BMC_PDR_END_RANGE = 0x00FFFFFF;
constexpr uint32_t HOST_PDR_START_RANGE = 0x01000000;
constexpr uint32_t HOST_PDR_END_RANGE = 0x01FFFFFF;

const pldm::pdr::TerminusID HYPERVISOR_TID = 208;

static constexpr uint8_t HEARTBEAT_TIMEOUT_DELTA = 10;

enum SetEventReceiverCount
{
    SET_EVENT_RECEIVER_SENT = 0x2,
};

class Handler : public oem_platform::Handler
{
  public:
    Handler(const pldm::utils::DBusHandler* dBusIntf,
            pldm::responder::CodeUpdate* codeUpdate,
            pldm::responder::SlotHandler* slotHandler, int mctp_fd,
            uint8_t mctp_eid, pldm::InstanceIdDb& instanceIdDb,
            sdeventplus::Event& event,
            pldm::requester::Handler<pldm::requester::Request>* handler) :
        oem_platform::Handler(dBusIntf), codeUpdate(codeUpdate),
        slotHandler(slotHandler), platformHandler(nullptr), mctp_fd(mctp_fd),
        mctp_eid(mctp_eid), instanceIdDb(instanceIdDb), event(event),
        handler(handler),
        timer(event, std::bind(std::mem_fn(&Handler::setSurvTimer), this,
                               HYPERVISOR_TID, false)),
        hostTransitioningToOff(true)
    {
        codeUpdate->setVersions();
        setEventReceiverCnt = 0;

        using namespace sdbusplus::bus::match::rules;
        hostOffMatch = std::make_unique<sdbusplus::bus::match_t>(
            pldm::utils::DBusHandler::getBus(),
            propertiesChanged("/xyz/openbmc_project/state/host0",
                              "xyz.openbmc_project.State.Host"),
            [this](sdbusplus::message_t& msg) {
                pldm::utils::DbusChangedProps props{};
                std::string intf;
                msg.read(intf, props);
                const auto itr = props.find("CurrentHostState");
                if (itr != props.end())
                {
                    pldm::utils::PropertyValue value = itr->second;
                    auto propVal = std::get<std::string>(value);
                    if (propVal ==
                        "xyz.openbmc_project.State.Host.HostState.Off")
                    {
                        hostOff = true;
                        setEventReceiverCnt = 0;
                        disableWatchDogTimer();
                        startStopTimer(false);
                    }
                    else if (propVal ==
                             "xyz.openbmc_project.State.Host.HostState.Running")
                    {
                        hostOff = false;
                        hostTransitioningToOff = false;
                    }
                    else if (
                        propVal ==
                        "xyz.openbmc_project.State.Host.HostState.TransitioningToOff")
                    {
                        hostTransitioningToOff = true;
                    }
                }
            });

        powerStateOffMatch = std::make_unique<sdbusplus::bus::match_t>(
            pldm::utils::DBusHandler::getBus(),
            propertiesChanged("/xyz/openbmc_project/state/chassis0",
                              "xyz.openbmc_project.State.Chassis"),
            [](sdbusplus::message_t& msg) {
                pldm::utils::DbusChangedProps props{};
                std::string intf;
                msg.read(intf, props);
                const auto itr = props.find("CurrentPowerState");
                if (itr != props.end())
                {
                    pldm::utils::PropertyValue value = itr->second;
                    auto propVal = std::get<std::string>(value);
                    if (propVal ==
                        "xyz.openbmc_project.State.Chassis.PowerState.Off")
                    {
                        static constexpr auto searchpath =
                            "/xyz/openbmc_project/inventory/system/chassis/motherboard";
                        int depth = 0;
                        std::vector<std::string> powerInterface = {
                            "xyz.openbmc_project.State.Decorator.PowerState"};
                        pldm::utils::GetSubTreeResponse response =
                            pldm::utils::DBusHandler().getSubtree(
                                searchpath, depth, powerInterface);
                        for (const auto& [objPath, serviceMap] : response)
                        {
                            pldm::utils::DBusMapping dbusMapping{
                                objPath,
                                "xyz.openbmc_project.State.Decorator.PowerState",
                                "PowerState", "string"};
                            value =
                                "xyz.openbmc_project.State.Decorator.PowerState.State.Off";
                            try
                            {
                                pldm::utils::DBusHandler().setDbusProperty(
                                    dbusMapping, value);
                            }
                            catch (const std::exception& e)
                            {
                                error(
                                    "Unable to set the slot power state to Off error - {ERROR}",
                                    "ERROR", e);
                            }
                        }
                    }
                }
            });
        updateBIOSMatch = std::make_unique<sdbusplus::bus::match_t>(
            pldm::utils::DBusHandler::getBus(),
            propertiesChanged("/xyz/openbmc_project/bios_config/manager",
                              "xyz.openbmc_project.BIOSConfig.Manager"),
            [codeUpdate](sdbusplus::message_t& msg) {
                constexpr auto propertyName = "PendingAttributes";
                using Value =
                    std::variant<std::string, PendingAttributes, BaseBIOSTable>;
                using Properties = std::map<pldm::utils::DbusProp, Value>;
                Properties props{};
                std::string intf;
                msg.read(intf, props);
                auto valPropMap = props.find(propertyName);
                if (valPropMap == props.end())
                {
                    return;
                }

                PendingAttributes pendingAttributes =
                    std::get<PendingAttributes>(valPropMap->second);
                for (auto it : pendingAttributes)
                {
                    if (it.first == "fw_boot_side")
                    {
                        auto& [attributeType, attributevalue] = it.second;
                        std::string nextBootSideAttr =
                            std::get<std::string>(attributevalue);
                        std::string nextBootSide =
                            (nextBootSideAttr == "Perm" ? Pside : Tside);
                        codeUpdate->setNextBootSide(nextBootSide);
                    }
                }
            });
    }

    int getOemStateSensorReadingsHandler(
        pldm::pdr::EntityType entityType,
        pldm::pdr::EntityInstance entityInstance,
        pldm::pdr::ContainerID containerId, pldm::pdr::StateSetId stateSetId,
        pldm::pdr::CompositeCount compSensorCnt, uint16_t sensorId,
        std::vector<get_sensor_state_field>& stateField);

    int oemSetStateEffecterStatesHandler(
        uint16_t entityType, uint16_t entityInstance, uint16_t stateSetId,
        uint8_t compEffecterCnt,
        std::vector<set_effecter_state_field>& stateField, uint16_t effecterId);

    /** @brief Method to set the platform handler in the
     *         oem_ibm_handler class
     *  @param[in] handler - pointer to PLDM platform handler
     */
    void setPlatformHandler(pldm::responder::platform::Handler* handler);

    /** @brief Method to fetch the effecter ID of the code update PDRs
     *
     * @return platformHandler->getNextEffecterId() - returns the
     *             effecter ID from the platform handler
     */
    virtual uint16_t getNextEffecterId()
    {
        return platformHandler->getNextEffecterId();
    }

    /** @brief Method to fetch the sensor ID of the code update PDRs
     *
     * @return platformHandler->getNextSensorId() - returns the
     *             Sensor ID from the platform handler
     */
    virtual uint16_t getNextSensorId()
    {
        return platformHandler->getNextSensorId();
    }

    /** @brief Get std::map associated with the entity
     *         key: object path
     *         value: pldm_entity
     *
     *  @return std::map<ObjectPath, pldm_entity>
     */
    virtual const AssociatedEntityMap& getAssociateEntityMap()
    {
        return platformHandler->getAssociateEntityMap();
    }

    /** @brief Method to Generate the OEM PDRs
     *
     * @param[in] repo - instance of concrete implementation of Repo
     */
    void buildOEMPDR(pdr_utils::Repo& repo);

    /** @brief Method to send code update event to host
     * @param[in] sensorId - sendor ID
     * @param[in] sensorEventClass - event class of sensor
     * @param[in] sensorOffset - sensor offset
     * @param[in] eventState - new code update event state
     * @param[in] prevEventState - previous code update event state
     * @return none
     */
    void sendStateSensorEvent(uint16_t sensorId,
                              enum sensor_event_class_states sensorEventClass,
                              uint8_t sensorOffset, uint8_t eventState,
                              uint8_t prevEventState);

    /** @brief Method to send encoded request msg of code update event to host
     *  @param[in] requestMsg - encoded request msg
     *  @param[in] instanceId - instance id of the message
     *  @return PLDM status code
     */
    int sendEventToHost(std::vector<uint8_t>& requestMsg, uint8_t instanceId);

    /** @brief _processEndUpdate processes the actual work that needs
     *  to be carried out after EndUpdate effecter is set. This is done async
     *  after sending response for EndUpdate set effecter
     *  @param[in] source - sdeventplus event source
     */
    void _processEndUpdate(sdeventplus::source::EventBase& source);

    /** @brief _processStartUpdate processes the actual work that needs
     *  to be carried out after StartUpdate effecter is set. This is done async
     *  after sending response for StartUpdate set effecter
     *  @param[in] source - sdeventplus event source
     */
    void _processStartUpdate(sdeventplus::source::EventBase& source);

    /** @brief _processSystemReboot processes the actual work that needs to be
     *  carried out after the System Power State effecter is set to reboot
     *  the system
     *  @param[in] source - sdeventplus event source
     */
    void _processSystemReboot(sdeventplus::source::EventBase& source);

    /*keeps track how many times setEventReceiver is sent */
    void countSetEventReceiver()
    {
        setEventReceiverCnt++;
    }

    /* disables watchdog if running and Host is up */
    void checkAndDisableWatchDog();

    /** @brief To check if the watchdog app is running
     *
     *  @return the running status of watchdog app
     */
    bool watchDogRunning();

    /** @brief Method to reset the Watchdog timer on receiving platform Event
     *  Message for heartbeat elapsed time from Hostboot
     */
    void resetWatchDogTimer();

    /** @brief To disable to the watchdog timer on host poweron completion*/
    void disableWatchDogTimer();

    /** @brief to check the BMC state*/
    int checkBMCState();

    /** @brief update the dbus object paths */
    void updateOemDbusPaths(std::string& dbusPath);

    /** @brief Method to fetch the last BMC record from the PDR repo
     *
     * @param[in] repo - pointer to BMC's primary PDR repo
     *
     * @return the last BMC record from the repo
     */
    const pldm_pdr_record* fetchLastBMCRecord(const pldm_pdr* repo);

    /** @brief Method to check if the record handle passed is in remote PDR
     *         record handle range
     *
     *  @param[in] record_handle - record handle of the PDR
     *
     *  @return true if record handle passed is in host PDR record handle range
     */
    bool checkRecordHandleInRange(const uint32_t& record_handle);

    /** *brief Method to call the setEventReceiver command*/
    void processSetEventReceiver();

    /** @brief Method to call the setEventReceiver through the platform
     *   handler
     */
    virtual void setEventReceiver()
    {
        platformHandler->setEventReceiver();
    }

    /** @brief Method to Enable/Disable timer to see if remote terminus sends
     *  the surveillance ping and logs informational error if remote terminus
     *  fails to send the surveillance pings
     *
     * @param[in] tid - TID of the remote terminus
     * @param[in] value - true or false, to indicate if the timer is
     *                    running or not
     */
    void setSurvTimer(uint8_t tid, bool value);

    ~Handler() = default;

    pldm::responder::CodeUpdate* codeUpdate; //!< pointer to CodeUpdate object

    pldm::responder::SlotHandler*
        slotHandler; //!< pointer to SlotHandler object

    pldm::responder::platform::Handler*
        platformHandler; //!< pointer to PLDM platform handler

    /** @brief fd of MCTP communications socket */
    int mctp_fd;

    /** @brief MCTP EID of host firmware */
    uint8_t mctp_eid;

    /** @brief reference to an InstanceIdDb object, used to obtain a PLDM
     * instance id. */
    pldm::InstanceIdDb& instanceIdDb;
    /** @brief sdeventplus event source */
    std::unique_ptr<sdeventplus::source::Defer> assembleImageEvent;
    std::unique_ptr<sdeventplus::source::Defer> startUpdateEvent;
    std::unique_ptr<sdeventplus::source::Defer> systemRebootEvent;

    /** @brief Effecterid to dbus object path map
     */
    std::unordered_map<uint16_t, std::string> effecterIdToDbusMap;

    /** @brief reference of main event loop of pldmd, primarily used to schedule
     *  work
     */
    sdeventplus::Event& event;

  private:
    /** @brief Method to reset or stop the surveillance timer
     *
     * @param[in] value - true or false, to indicate if the timer
     *                    should be reset or turned off
     */
    void startStopTimer(bool value);

    /** @brief D-Bus property changed signal match for CurrentPowerState*/
    std::unique_ptr<sdbusplus::bus::match_t> chassisOffMatch;

    /** @brief PLDM request handler */
    pldm::requester::Handler<pldm::requester::Request>* handler;

    /** @brief D-Bus property changed signal match */
    std::unique_ptr<sdbusplus::bus::match_t> updateBIOSMatch;

    /** @brief D-Bus property changed signal match */
    std::unique_ptr<sdbusplus::bus::match_t> hostOffMatch;

    /** @brief D-Bus property changed signal match */
    std::unique_ptr<sdbusplus::bus::match_t> powerStateOffMatch;

    /** @brief Timer used for monitoring surveillance pings from host */
    sdeventplus::utility::Timer<sdeventplus::ClockId::Monotonic> timer;

    bool hostOff = true;

    bool hostTransitioningToOff;

    int setEventReceiverCnt = 0;
};

/** @brief Method to encode code update event msg
 *  @param[in] eventType - type of event
 *  @param[in] eventDataVec - vector of event data to be sent to host
 *  @param[in/out] requestMsg - request msg to be encoded
 *  @param[in] instanceId - instance ID
 *  @return PLDM status code
 */
int encodeEventMsg(uint8_t eventType, const std::vector<uint8_t>& eventDataVec,
                   std::vector<uint8_t>& requestMsg, uint8_t instanceId);

} // namespace oem_ibm_platform

} // namespace responder

} // namespace pldm