#include "inband_code_update.hpp"

#include "libpldm/entity.h"

#include "libpldmresponder/pdr.hpp"
#include "oem_ibm_handler.hpp"
#include "xyz/openbmc_project/Common/error.hpp"

#include <arpa/inet.h>

#include <sdbusplus/server.hpp>
#include <xyz/openbmc_project/Dump/NewDump/server.hpp>

#include <exception>
#include <fstream>
namespace pldm
{
using namespace utils;

namespace responder
{
using namespace oem_ibm_platform;

/** @brief Directory where the lid files without a header are stored */
auto lidDirPath = fs::path(LID_STAGING_DIR) / "lid";

/** @brief Directory where the image files are stored as they are built */
auto imageDirPath = fs::path(LID_STAGING_DIR) / "image";

/** @brief Directory where the code update tarball files are stored */
auto updateDirPath = fs::path(LID_STAGING_DIR) / "update";

/** @brief The file name of the code update tarball */
constexpr auto tarImageName = "image.tar";

/** @brief The file name of the hostfw image */
constexpr auto hostfwImageName = "image-hostfw";

/** @brief The path to the code update tarball file */
auto tarImagePath = fs::path(imageDirPath) / tarImageName;

/** @brief The path to the hostfw image */
auto hostfwImagePath = fs::path(imageDirPath) / hostfwImageName;

/** @brief The path to the tarball file expected by the phosphor software
 *         manager */
auto updateImagePath = fs::path("/tmp/images") / tarImageName;

std::string CodeUpdate::fetchCurrentBootSide()
{
    return currBootSide;
}

std::string CodeUpdate::fetchNextBootSide()
{
    return nextBootSide;
}

int CodeUpdate::setCurrentBootSide(const std::string& currSide)
{
    currBootSide = currSide;
    return PLDM_SUCCESS;
}

int CodeUpdate::setNextBootSide(const std::string& nextSide)
{
    nextBootSide = nextSide;
    std::string objPath{};
    if (nextBootSide == currBootSide)
    {
        objPath = runningVersion;
    }
    else
    {
        objPath = nonRunningVersion;
    }
    if (objPath.empty())
    {
        std::cerr << "no nonRunningVersion present \n";
        return PLDM_PLATFORM_INVALID_STATE_VALUE;
    }

    pldm::utils::DBusMapping dbusMapping{objPath, redundancyIntf, "Priority",
                                         "uint8_t"};
    uint8_t val = 0;
    pldm::utils::PropertyValue value = static_cast<uint8_t>(val);
    try
    {
        dBusIntf->setDbusProperty(dbusMapping, value);
    }
    catch (const std::exception& e)
    {
        std::cerr << "failed to set the next boot side to " << objPath.c_str()
                  << " ERROR=" << e.what() << "\n";
        return PLDM_ERROR;
    }
    return PLDM_SUCCESS;
}

int CodeUpdate::setRequestedApplyTime()
{
    int rc = PLDM_SUCCESS;
    pldm::utils::PropertyValue value =
        "xyz.openbmc_project.Software.ApplyTime.RequestedApplyTimes.OnReset";
    DBusMapping dbusMapping;
    dbusMapping.objectPath = "/xyz/openbmc_project/software/apply_time";
    dbusMapping.interface = "xyz.openbmc_project.Software.ApplyTime";
    dbusMapping.propertyName = "RequestedApplyTime";
    dbusMapping.propertyType = "string";
    try
    {
        pldm::utils::DBusHandler().setDbusProperty(dbusMapping, value);
    }
    catch (const std::exception& e)
    {
        std::cerr << "Failed To set RequestedApplyTime property "
                  << "ERROR=" << e.what() << std::endl;
        rc = PLDM_ERROR;
    }
    return rc;
}

int CodeUpdate::setRequestedActivation()
{
    int rc = PLDM_SUCCESS;
    pldm::utils::PropertyValue value =
        "xyz.openbmc_project.Software.Activation.RequestedActivations.Active";
    DBusMapping dbusMapping;
    dbusMapping.objectPath = newImageId;
    dbusMapping.interface = "xyz.openbmc_project.Software.Activation";
    dbusMapping.propertyName = "RequestedActivation";
    dbusMapping.propertyType = "string";
    try
    {
        pldm::utils::DBusHandler().setDbusProperty(dbusMapping, value);
    }
    catch (const std::exception& e)
    {
        std::cerr << "Failed To set RequestedActivation property"
                  << "ERROR=" << e.what() << std::endl;
        rc = PLDM_ERROR;
    }
    return rc;
}

void CodeUpdate::setVersions()
{
    static constexpr auto mapperService = "xyz.openbmc_project.ObjectMapper";
    static constexpr auto functionalObjPath =
        "/xyz/openbmc_project/software/functional";
    static constexpr auto activeObjPath =
        "/xyz/openbmc_project/software/active";
    static constexpr auto propIntf = "org.freedesktop.DBus.Properties";

    auto& bus = dBusIntf->getBus();
    try
    {
        auto method = bus.new_method_call(mapperService, functionalObjPath,
                                          propIntf, "Get");
        method.append("xyz.openbmc_project.Association", "endpoints");
        std::variant<std::vector<std::string>> paths;

        auto reply = bus.call(method);
        reply.read(paths);

        runningVersion = std::get<std::vector<std::string>>(paths)[0];

        auto method1 =
            bus.new_method_call(mapperService, activeObjPath, propIntf, "Get");
        method1.append("xyz.openbmc_project.Association", "endpoints");

        auto reply1 = bus.call(method1);
        reply1.read(paths);
        for (const auto& path : std::get<std::vector<std::string>>(paths))
        {
            if (path != runningVersion)
            {
                nonRunningVersion = path;
                break;
            }
        }
    }
    catch (const std::exception& e)
    {
        std::cerr << "failed to make a d-bus call to Object Mapper "
                     "Association, ERROR="
                  << e.what() << "\n";
        return;
    }

    using namespace sdbusplus::bus::match::rules;
    captureNextBootSideChange.push_back(
        std::make_unique<sdbusplus::bus::match_t>(
            pldm::utils::DBusHandler::getBus(),
            propertiesChanged(runningVersion, redundancyIntf),
            [this](sdbusplus::message_t& msg) {
                DbusChangedProps props;
                std::string iface;
                msg.read(iface, props);
                processPriorityChangeNotification(props);
            }));
    fwUpdateMatcher.push_back(std::make_unique<sdbusplus::bus::match_t>(
        pldm::utils::DBusHandler::getBus(),
        "interface='org.freedesktop.DBus.ObjectManager',type='signal',"
        "member='InterfacesAdded',path='/xyz/openbmc_project/software'",
        [this](sdbusplus::message_t& msg) {
            DBusInterfaceAdded interfaces;
            sdbusplus::message::object_path path;
            msg.read(path, interfaces);

            for (auto& interface : interfaces)
            {
                if (interface.first ==
                    "xyz.openbmc_project.Software.Activation")
                {
                    auto imageInterface =
                        "xyz.openbmc_project.Software.Activation";
                    auto imageObjPath = path.str.c_str();

                    try
                    {
                        auto propVal = dBusIntf->getDbusPropertyVariant(
                            imageObjPath, "Activation", imageInterface);
                        const auto& imageProp = std::get<std::string>(propVal);
                        if (imageProp == "xyz.openbmc_project.Software."
                                         "Activation.Activations.Ready" &&
                            isCodeUpdateInProgress())
                        {
                            newImageId = path.str;
                            if (!imageActivationMatch)
                            {
                                imageActivationMatch = std::make_unique<
                                    sdbusplus::bus::match_t>(
                                    pldm::utils::DBusHandler::getBus(),
                                    propertiesChanged(newImageId,
                                                      "xyz.openbmc_project."
                                                      "Software.Activation"),
                                    [this](sdbusplus::message_t& msg) {
                                        DbusChangedProps props;
                                        std::string iface;
                                        msg.read(iface, props);
                                        const auto itr =
                                            props.find("Activation");
                                        if (itr != props.end())
                                        {
                                            PropertyValue value = itr->second;
                                            auto propVal =
                                                std::get<std::string>(value);
                                            if (propVal ==
                                                "xyz.openbmc_project.Software."
                                                "Activation.Activations.Active")
                                            {
                                                CodeUpdateState state =
                                                    CodeUpdateState::END;
                                                setCodeUpdateProgress(false);
                                                auto sensorId =
                                                    getFirmwareUpdateSensor();
                                                sendStateSensorEvent(
                                                    sensorId,
                                                    PLDM_STATE_SENSOR_STATE, 0,
                                                    uint8_t(state),
                                                    uint8_t(CodeUpdateState::
                                                                START));
                                                newImageId.clear();
                                            }
                                            else if (propVal ==
                                                         "xyz.openbmc_project."
                                                         "Software.Activation."
                                                         "Activations.Failed" ||
                                                     propVal ==
                                                         "xyz.openbmc_"
                                                         "project.Software."
                                                         "Activation."
                                                         "Activations."
                                                         "Invalid")
                                            {
                                                CodeUpdateState state =
                                                    CodeUpdateState::FAIL;
                                                setCodeUpdateProgress(false);
                                                auto sensorId =
                                                    getFirmwareUpdateSensor();
                                                sendStateSensorEvent(
                                                    sensorId,
                                                    PLDM_STATE_SENSOR_STATE, 0,
                                                    uint8_t(state),
                                                    uint8_t(CodeUpdateState::
                                                                START));
                                                newImageId.clear();
                                            }
                                        }
                                    });
                            }
                            auto rc = setRequestedActivation();
                            if (rc != PLDM_SUCCESS)
                            {
                                CodeUpdateState state = CodeUpdateState::FAIL;
                                setCodeUpdateProgress(false);
                                auto sensorId = getFirmwareUpdateSensor();
                                sendStateSensorEvent(
                                    sensorId, PLDM_STATE_SENSOR_STATE, 0,
                                    uint8_t(state),
                                    uint8_t(CodeUpdateState::START));
                                std::cerr
                                    << "could not set RequestedActivation \n";
                            }
                            break;
                        }
                    }
                    catch (const sdbusplus::exception_t& e)
                    {
                        std::cerr << "Error in getting Activation status \n";
                    }
                }
            }
        }));
}

void CodeUpdate::processPriorityChangeNotification(
    const DbusChangedProps& chProperties)
{
    static constexpr auto propName = "Priority";
    const auto it = chProperties.find(propName);
    if (it == chProperties.end())
    {
        return;
    }
    uint8_t newVal = std::get<uint8_t>(it->second);
    nextBootSide = (newVal == 0) ? currBootSide
                                 : ((currBootSide == Tside) ? Pside : Tside);
}

void CodeUpdate::setOemPlatformHandler(
    pldm::responder::oem_platform::Handler* handler)
{
    oemPlatformHandler = handler;
}

void CodeUpdate::clearDirPath(const std::string& dirPath)
{
    if (!fs::is_directory(dirPath))
    {
        std::cerr << "The directory does not exist, dirPath = " << dirPath
                  << std::endl;
        return;
    }
    for (const auto& iter : fs::directory_iterator(dirPath))
    {
        fs::remove_all(iter);
    }
}

void CodeUpdate::sendStateSensorEvent(
    uint16_t sensorId, enum sensor_event_class_states sensorEventClass,
    uint8_t sensorOffset, uint8_t eventState, uint8_t prevEventState)
{
    pldm::responder::oem_ibm_platform::Handler* oemIbmPlatformHandler =
        dynamic_cast<pldm::responder::oem_ibm_platform::Handler*>(
            oemPlatformHandler);
    oemIbmPlatformHandler->sendStateSensorEvent(
        sensorId, sensorEventClass, sensorOffset, eventState, prevEventState);
}

void CodeUpdate::deleteImage()
{
    static constexpr auto UPDATER_SERVICE =
        "xyz.openbmc_project.Software.BMC.Updater";
    static constexpr auto SW_OBJ_PATH = "/xyz/openbmc_project/software";
    static constexpr auto DELETE_INTF =
        "xyz.openbmc_project.Collection.DeleteAll";

    auto& bus = dBusIntf->getBus();
    try
    {
        auto method = bus.new_method_call(UPDATER_SERVICE, SW_OBJ_PATH,
                                          DELETE_INTF, "DeleteAll");
        bus.call_noreply(method);
    }
    catch (const std::exception& e)
    {
        std::cerr << "Failed to delete image, ERROR=" << e.what() << "\n";
        return;
    }
}

uint8_t fetchBootSide(uint16_t entityInstance, CodeUpdate* codeUpdate)
{
    uint8_t sensorOpState = tSideNum;
    if (entityInstance == 0)
    {
        auto currSide = codeUpdate->fetchCurrentBootSide();
        if (currSide == Pside)
        {
            sensorOpState = pSideNum;
        }
    }
    else if (entityInstance == 1)
    {
        auto nextSide = codeUpdate->fetchNextBootSide();
        if (nextSide == Pside)
        {
            sensorOpState = pSideNum;
        }
    }
    else
    {
        sensorOpState = PLDM_SENSOR_UNKNOWN;
    }

    return sensorOpState;
}

int setBootSide(uint16_t entityInstance, uint8_t currState,
                const std::vector<set_effecter_state_field>& stateField,
                CodeUpdate* codeUpdate)
{
    int rc = PLDM_SUCCESS;
    auto side = (stateField[currState].effecter_state == pSideNum) ? "P" : "T";

    if (entityInstance == 0)
    {
        rc = codeUpdate->setCurrentBootSide(side);
    }
    else if (entityInstance == 1)
    {
        rc = codeUpdate->setNextBootSide(side);
    }
    else
    {
        rc = PLDM_PLATFORM_INVALID_STATE_VALUE;
    }
    return rc;
}

template <typename... T>
int executeCmd(T const&... t)
{
    std::stringstream cmd;
    ((cmd << t << " "), ...) << std::endl;
    FILE* pipe = popen(cmd.str().c_str(), "r");
    if (!pipe)
    {
        throw std::runtime_error("popen() failed!");
    }
    int rc = pclose(pipe);
    if (WEXITSTATUS(rc))
    {
        std::cerr << "Error executing: ";
        ((std::cerr << " " << t), ...);
        std::cerr << "\n";
        return -1;
    }

    return 0;
}

int processCodeUpdateLid(const std::string& filePath)
{
    struct LidHeader
    {
        uint16_t magicNumber;
        uint16_t headerVersion;
        uint32_t lidNumber;
        uint32_t lidDate;
        uint16_t lidTime;
        uint16_t lidClass;
        uint32_t lidCrc;
        uint32_t lidSize;
        uint32_t headerSize;
    };
    LidHeader header;

    std::ifstream ifs(filePath, std::ios::in | std::ios::binary);
    if (!ifs)
    {
        std::cerr << "ifstream open error: " << filePath << "\n";
        return PLDM_ERROR;
    }
    ifs.seekg(0);
    ifs.read(reinterpret_cast<char*>(&header), sizeof(header));

    // File size should be the value of lid size minus the header size
    auto fileSize = fs::file_size(filePath);
    fileSize -= htonl(header.headerSize);
    if (fileSize < htonl(header.lidSize))
    {
        // File is not completely written yet
        ifs.close();
        return PLDM_SUCCESS;
    }

    constexpr auto magicNumber = 0x0222;
    if (htons(header.magicNumber) != magicNumber)
    {
        std::cerr << "Invalid magic number: " << filePath << "\n";
        ifs.close();
        return PLDM_ERROR;
    }

    fs::create_directories(imageDirPath);
    fs::create_directories(lidDirPath);

    constexpr auto bmcClass = 0x2000;
    if (htons(header.lidClass) == bmcClass)
    {
        // Skip the header and concatenate the BMC LIDs into a tar file
        std::ofstream ofs(tarImagePath,
                          std::ios::out | std::ios::binary | std::ios::app);
        ifs.seekg(htonl(header.headerSize));
        ofs << ifs.rdbuf();
        ofs.flush();
        ofs.close();
    }
    else
    {
        std::stringstream lidFileName;
        lidFileName << std::hex << htonl(header.lidNumber) << ".lid";
        auto lidNoHeaderPath = fs::path(lidDirPath) / lidFileName.str();
        std::ofstream ofs(lidNoHeaderPath,
                          std::ios::out | std::ios::binary | std::ios::trunc);
        ifs.seekg(htonl(header.headerSize));
        ofs << ifs.rdbuf();
        ofs.flush();
        ofs.close();
    }

    ifs.close();
    fs::remove(filePath);
    return PLDM_SUCCESS;
}

int CodeUpdate::assembleCodeUpdateImage()
{
    pid_t pid = fork();

    if (pid == 0)
    {
        pid_t nextPid = fork();
        if (nextPid == 0)
        {
            // Create the hostfw squashfs image from the LID files without
            // header
            auto rc = executeCmd("/usr/sbin/mksquashfs", lidDirPath.c_str(),
                                 hostfwImagePath.c_str(), "-all-root",
                                 "-no-recovery");
            if (rc < 0)
            {
                std::cerr << "Error occurred during the mksqusquashfs call"
                          << std::endl;
                setCodeUpdateProgress(false);
                auto sensorId = getFirmwareUpdateSensor();
                sendStateSensorEvent(sensorId, PLDM_STATE_SENSOR_STATE, 0,
                                     uint8_t(CodeUpdateState::FAIL),
                                     uint8_t(CodeUpdateState::START));
                exit(EXIT_FAILURE);
            }

            fs::create_directories(updateDirPath);

            // Extract the BMC tarball content
            rc = executeCmd("/bin/tar", "-xf", tarImagePath.c_str(), "-C",
                            updateDirPath);
            if (rc < 0)
            {
                setCodeUpdateProgress(false);
                auto sensorId = getFirmwareUpdateSensor();
                sendStateSensorEvent(sensorId, PLDM_STATE_SENSOR_STATE, 0,
                                     uint8_t(CodeUpdateState::FAIL),
                                     uint8_t(CodeUpdateState::START));
                exit(EXIT_FAILURE);
            }

            // Add the hostfw image to the directory where the contents were
            // extracted
            fs::copy_file(hostfwImagePath,
                          fs::path(updateDirPath) / hostfwImageName,
                          fs::copy_options::overwrite_existing);

            // Remove the tarball file, then re-generate it with so that the
            // hostfw image becomes part of the tarball
            fs::remove(tarImagePath);
            rc = executeCmd("/bin/tar", "-cf", tarImagePath, ".", "-C",
                            updateDirPath);
            if (rc < 0)
            {
                std::cerr
                    << "Error occurred during the generation of the tarball"
                    << std::endl;
                setCodeUpdateProgress(false);
                auto sensorId = getFirmwareUpdateSensor();
                sendStateSensorEvent(sensorId, PLDM_STATE_SENSOR_STATE, 0,
                                     uint8_t(CodeUpdateState::FAIL),
                                     uint8_t(CodeUpdateState::START));
                exit(EXIT_FAILURE);
            }

            // Copy the tarball to the update directory to trigger the phosphor
            // software manager to create a version interface
            fs::copy_file(tarImagePath, updateImagePath,
                          fs::copy_options::overwrite_existing);

            // Cleanup
            fs::remove_all(updateDirPath);
            fs::remove_all(lidDirPath);
            fs::remove_all(imageDirPath);

            exit(EXIT_SUCCESS);
        }
        else if (nextPid < 0)
        {
            std::cerr << "Error occurred during fork. ERROR=" << errno
                      << std::endl;
            exit(EXIT_FAILURE);
        }

        // Do nothing as parent. When parent exits, child will be reparented
        // under init and be reaped properly.
        exit(0);
    }
    else if (pid > 0)
    {
        int status;
        if (waitpid(pid, &status, 0) < 0)
        {
            std::cerr << "Error occurred during waitpid. ERROR=" << errno
                      << std::endl;
            return PLDM_ERROR;
        }
        else if (WEXITSTATUS(status) != 0)
        {
            std::cerr
                << "Failed to execute the assembling of the image. STATUS="
                << status << std::endl;
            return PLDM_ERROR;
        }
    }
    else
    {
        std::cerr << "Error occurred during fork. ERROR=" << errno << std::endl;
        return PLDM_ERROR;
    }

    return PLDM_SUCCESS;
}

} // namespace responder
} // namespace pldm