#pragma once

#include "async_resp.hpp"
#include "dbus_utility.hpp"
#include "error_messages.hpp"
#include "generated/enums/pcie_device.hpp"
#include "generated/enums/pcie_slots.hpp"
#include "http/utility.hpp"

#include <boost/system/error_code.hpp>
#include <boost/url/format.hpp>
#include <nlohmann/json.hpp>

#include <array>
#include <memory>
#include <optional>
#include <string>
#include <string_view>

namespace redfish
{
namespace pcie_util
{

/**
 * @brief Populate the PCIe Device list from a GetSubTreePaths search of
 *        inventory
 *
 * @param[i,o] asyncResp  Async response object
 * @param[i]   Name   Key to store the list of PCIe devices in asyncResp
 *
 * @return void
 */

inline void
    getPCIeDeviceList(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                      const std::string& name)
{
    static constexpr std::array<std::string_view, 1> pcieDeviceInterface = {
        "xyz.openbmc_project.Inventory.Item.PCIeDevice"};

    dbus::utility::getSubTreePaths(
        "/xyz/openbmc_project/inventory", 0, pcieDeviceInterface,
        [asyncResp, name](const boost::system::error_code& ec,
                          const dbus::utility::MapperGetSubTreePathsResponse&
                              pcieDevicePaths) {
        if (ec)
        {
            BMCWEB_LOG_DEBUG << "no PCIe device paths found ec: "
                             << ec.message();
            // Not an error, system just doesn't have PCIe info
            return;
        }
        nlohmann::json& pcieDeviceList = asyncResp->res.jsonValue[name];
        pcieDeviceList = nlohmann::json::array();
        for (const std::string& pcieDevicePath : pcieDevicePaths)
        {
            size_t devStart = pcieDevicePath.rfind('/');
            if (devStart == std::string::npos)
            {
                continue;
            }

            std::string devName = pcieDevicePath.substr(devStart + 1);
            if (devName.empty())
            {
                continue;
            }
            nlohmann::json::object_t pcieDevice;
            pcieDevice["@odata.id"] = boost::urls::format(
                "/redfish/v1/Systems/system/PCIeDevices/{}", devName);
            pcieDeviceList.emplace_back(std::move(pcieDevice));
        }
        asyncResp->res.jsonValue[name + "@odata.count"] = pcieDeviceList.size();
        });
}

inline std::optional<pcie_slots::SlotTypes>
    dbusSlotTypeToRf(const std::string& slotType)
{
    if (slotType ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.FullLength")
    {
        return pcie_slots::SlotTypes::FullLength;
    }
    if (slotType ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.HalfLength")
    {
        return pcie_slots::SlotTypes::HalfLength;
    }
    if (slotType ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.LowProfile")
    {
        return pcie_slots::SlotTypes::LowProfile;
    }
    if (slotType ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.Mini")
    {
        return pcie_slots::SlotTypes::Mini;
    }
    if (slotType == "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.M_2")
    {
        return pcie_slots::SlotTypes::M2;
    }
    if (slotType == "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.OEM")
    {
        return pcie_slots::SlotTypes::OEM;
    }
    if (slotType ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.OCP3Small")
    {
        return pcie_slots::SlotTypes::OCP3Small;
    }
    if (slotType ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.OCP3Large")
    {
        return pcie_slots::SlotTypes::OCP3Large;
    }
    if (slotType == "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.U_2")
    {
        return pcie_slots::SlotTypes::U2;
    }
    if (slotType ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.SlotTypes.Unknown")
    {
        return pcie_slots::SlotTypes::Invalid;
    }

    // Unspecified slotType should return an internal error.
    return std::nullopt;
}

inline std::optional<pcie_device::PCIeTypes>
    redfishPcieGenerationFromDbus(const std::string& generationInUse)
{
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen1")
    {
        return pcie_device::PCIeTypes::Gen1;
    }
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen2")
    {
        return pcie_device::PCIeTypes::Gen2;
    }
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen3")
    {
        return pcie_device::PCIeTypes::Gen3;
    }
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen4")
    {
        return pcie_device::PCIeTypes::Gen4;
    }
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen5")
    {
        return pcie_device::PCIeTypes::Gen5;
    }
    if (generationInUse.empty() ||
        generationInUse ==
            "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Unknown")
    {
        return pcie_device::PCIeTypes::Invalid;
    }

    // The value is not unknown or Gen1-5, need return an internal error.
    return std::nullopt;
}

} // namespace pcie_util
} // namespace redfish