#pragma once

#include "app.hpp"
#include "dbus_utility.hpp"
#include "error_messages.hpp"
#include "generated/enums/pcie_slots.hpp"
#include "query.hpp"
#include "registries/privilege_registry.hpp"
#include "utility.hpp"
#include "utils/dbus_utils.hpp"
#include "utils/json_utils.hpp"
#include "utils/pcie_util.hpp"

#include <boost/system/error_code.hpp>
#include <boost/url/format.hpp>
#include <sdbusplus/asio/property.hpp>
#include <sdbusplus/unpack_properties.hpp>

#include <array>
#include <string_view>

namespace redfish
{

inline void
    onPcieSlotGetAllDone(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                         const boost::system::error_code& ec,
                         const dbus::utility::DBusPropertiesMap& propertiesList)
{
    if (ec)
    {
        BMCWEB_LOG_ERROR("Can't get PCIeSlot properties!");
        messages::internalError(asyncResp->res);
        return;
    }

    nlohmann::json& slots = asyncResp->res.jsonValue["Slots"];

    nlohmann::json::array_t* slotsPtr =
        slots.get_ptr<nlohmann::json::array_t*>();
    if (slotsPtr == nullptr)
    {
        BMCWEB_LOG_ERROR("Slots key isn't an array???");
        messages::internalError(asyncResp->res);
        return;
    }

    nlohmann::json::object_t slot;

    const std::string* generation = nullptr;
    const size_t* lanes = nullptr;
    const std::string* slotType = nullptr;
    const bool* hotPluggable = nullptr;

    const bool success = sdbusplus::unpackPropertiesNoThrow(
        dbus_utils::UnpackErrorPrinter(), propertiesList, "Generation",
        generation, "Lanes", lanes, "SlotType", slotType, "HotPluggable",
        hotPluggable);

    if (!success)
    {
        messages::internalError(asyncResp->res);
        return;
    }

    if (generation != nullptr)
    {
        std::optional<pcie_device::PCIeTypes> pcieType =
            pcie_util::redfishPcieGenerationFromDbus(*generation);
        if (!pcieType)
        {
            BMCWEB_LOG_WARNING("Unknown PCIe Slot Generation: {}", *generation);
        }
        else
        {
            if (*pcieType == pcie_device::PCIeTypes::Invalid)
            {
                messages::internalError(asyncResp->res);
                return;
            }
            slot["PCIeType"] = *pcieType;
        }
    }

    if (lanes != nullptr && *lanes != 0)
    {
        slot["Lanes"] = *lanes;
    }

    if (slotType != nullptr)
    {
        std::optional<pcie_slots::SlotTypes> redfishSlotType =
            pcie_util::dbusSlotTypeToRf(*slotType);
        if (!redfishSlotType)
        {
            BMCWEB_LOG_WARNING("Unknown PCIe Slot Type: {}", *slotType);
        }
        else
        {
            if (*redfishSlotType == pcie_slots::SlotTypes::Invalid)
            {
                BMCWEB_LOG_ERROR("Unknown PCIe Slot Type: {}", *slotType);
                messages::internalError(asyncResp->res);
                return;
            }
            slot["SlotType"] = *redfishSlotType;
        }
    }

    if (hotPluggable != nullptr)
    {
        slot["HotPluggable"] = *hotPluggable;
    }

    slots.emplace_back(std::move(slot));
}

inline void onMapperAssociationDone(
    const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
    const std::string& chassisID, const std::string& pcieSlotPath,
    const std::string& connectionName, const boost::system::error_code& ec,
    const dbus::utility::MapperEndPoints& pcieSlotChassis)
{
    if (ec)
    {
        if (ec.value() == EBADR)
        {
            // This PCIeSlot have no chassis association.
            return;
        }
        BMCWEB_LOG_ERROR("DBUS response error");
        messages::internalError(asyncResp->res);
        return;
    }

    if (pcieSlotChassis.size() != 1)
    {
        BMCWEB_LOG_ERROR("PCIe Slot association error! ");
        messages::internalError(asyncResp->res);
        return;
    }

    sdbusplus::message::object_path path(pcieSlotChassis[0]);
    std::string chassisName = path.filename();
    if (chassisName != chassisID)
    {
        // The pcie slot doesn't belong to the chassisID
        return;
    }

    sdbusplus::asio::getAllProperties(
        *crow::connections::systemBus, connectionName, pcieSlotPath,
        "xyz.openbmc_project.Inventory.Item.PCIeSlot",
        [asyncResp](const boost::system::error_code& ec2,
                    const dbus::utility::DBusPropertiesMap& propertiesList) {
        onPcieSlotGetAllDone(asyncResp, ec2, propertiesList);
    });
}

inline void
    onMapperSubtreeDone(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                        const std::string& chassisID,
                        const boost::system::error_code& ec,
                        const dbus::utility::MapperGetSubTreeResponse& subtree)
{
    if (ec)
    {
        BMCWEB_LOG_ERROR("D-Bus response error on GetSubTree {}", ec);
        messages::internalError(asyncResp->res);
        return;
    }
    if (subtree.empty())
    {
        messages::resourceNotFound(asyncResp->res, "Chassis", chassisID);
        return;
    }

    BMCWEB_LOG_DEBUG("Get properties for PCIeSlots associated to chassis = {}",
                     chassisID);

    asyncResp->res.jsonValue["@odata.type"] = "#PCIeSlots.v1_4_1.PCIeSlots";
    asyncResp->res.jsonValue["Name"] = "PCIe Slot Information";
    asyncResp->res.jsonValue["@odata.id"] =
        boost::urls::format("/redfish/v1/Chassis/{}/PCIeSlots", chassisID);
    asyncResp->res.jsonValue["Id"] = "1";
    asyncResp->res.jsonValue["Slots"] = nlohmann::json::array();

    for (const auto& pathServicePair : subtree)
    {
        const std::string& pcieSlotPath = pathServicePair.first;
        for (const auto& connectionInterfacePair : pathServicePair.second)
        {
            const std::string& connectionName = connectionInterfacePair.first;
            sdbusplus::message::object_path pcieSlotAssociationPath(
                pcieSlotPath);
            pcieSlotAssociationPath /= "chassis";

            // The association of this PCIeSlot is used to determine whether
            // it belongs to this ChassisID
            dbus::utility::getAssociationEndPoints(
                std::string{pcieSlotAssociationPath},
                [asyncResp, chassisID, pcieSlotPath, connectionName](
                    const boost::system::error_code& ec2,
                    const dbus::utility::MapperEndPoints& endpoints) {
                onMapperAssociationDone(asyncResp, chassisID, pcieSlotPath,
                                        connectionName, ec2, endpoints);
            });
        }
    }
}

inline void handlePCIeSlotCollectionGet(
    crow::App& app, const crow::Request& req,
    const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
    const std::string& chassisID)
{
    if (!redfish::setUpRedfishRoute(app, req, asyncResp))
    {
        return;
    }

    constexpr std::array<std::string_view, 1> interfaces = {
        "xyz.openbmc_project.Inventory.Item.PCIeSlot"};
    dbus::utility::getSubTree(
        "/xyz/openbmc_project/inventory", 0, interfaces,
        [asyncResp,
         chassisID](const boost::system::error_code& ec,
                    const dbus::utility::MapperGetSubTreeResponse& subtree) {
        onMapperSubtreeDone(asyncResp, chassisID, ec, subtree);
    });
}

inline void requestRoutesPCIeSlots(App& app)
{
    BMCWEB_ROUTE(app, "/redfish/v1/Chassis/<str>/PCIeSlots/")
        .privileges(redfish::privileges::getPCIeSlots)
        .methods(boost::beast::http::verb::get)(
            std::bind_front(handlePCIeSlotCollectionGet, std::ref(app)));
}

} // namespace redfish