#include "DeviceVerificationFlow.h"

#include "Cache.h"
#include "ChatPage.h"
#include "Logging.h"
#include "timeline/TimelineModel.h"

#include <QDateTime>
#include <QTimer>
#include <iostream>

static constexpr int TIMEOUT = 2 * 60 * 1000; // 2 minutes

namespace msgs = mtx::events::msg;

DeviceVerificationFlow::DeviceVerificationFlow(QObject *,
                                               DeviceVerificationFlow::Type flow_type,
                                               TimelineModel *model)
  : type(flow_type)
  , model_(model)
{
        timeout = new QTimer(this);
        timeout->setSingleShot(true);
        this->sas           = olm::client()->sas_init();
        this->isMacVerified = false;

        if (model) {
                connect(this->model_,
                        &TimelineModel::updateFlowEventId,
                        this,
                        [this](std::string event_id_) {
                                this->relation.rel_type = mtx::common::RelationType::Reference;
                                this->relation.event_id = event_id_;
                                this->transaction_id    = event_id_;
                        });
        }

        connect(timeout, &QTimer::timeout, this, [this]() {
                emit timedout();
                this->cancelVerification(DeviceVerificationFlow::Error::Timeout);
                this->deleteLater();
        });

        connect(this, &DeviceVerificationFlow::deleteFlow, this, [this]() { this->deleteLater(); });

        connect(
          ChatPage::instance(),
          &ChatPage::recievedDeviceVerificationStart,
          this,
          [this](const mtx::events::msg::KeyVerificationStart &msg, std::string) {
                  if (msg.transaction_id.has_value()) {
                          if (msg.transaction_id.value() != this->transaction_id)
                                  return;
                  } else if (msg.relates_to.has_value()) {
                          if (msg.relates_to.value().event_id != this->relation.event_id)
                                  return;
                  }
                  if ((std::find(msg.key_agreement_protocols.begin(),
                                 msg.key_agreement_protocols.end(),
                                 "curve25519-hkdf-sha256") != msg.key_agreement_protocols.end()) &&
                      (std::find(msg.hashes.begin(), msg.hashes.end(), "sha256") !=
                       msg.hashes.end()) &&
                      (std::find(msg.message_authentication_codes.begin(),
                                 msg.message_authentication_codes.end(),
                                 "hkdf-hmac-sha256") != msg.message_authentication_codes.end())) {
                          if (std::find(msg.short_authentication_string.begin(),
                                        msg.short_authentication_string.end(),
                                        mtx::events::msg::SASMethods::Decimal) !=
                              msg.short_authentication_string.end()) {
                                  this->method = DeviceVerificationFlow::Method::Emoji;
                          } else if (std::find(msg.short_authentication_string.begin(),
                                               msg.short_authentication_string.end(),
                                               mtx::events::msg::SASMethods::Emoji) !=
                                     msg.short_authentication_string.end()) {
                                  this->method = DeviceVerificationFlow::Method::Decimal;
                          } else {
                                  this->cancelVerification(
                                    DeviceVerificationFlow::Error::UnknownMethod);
                                  return;
                          }
                          if (!sender)
                                  this->canonical_json = nlohmann::json(msg);
                          else {
                                  if (utils::localUser().toStdString() <
                                      this->toClient.to_string()) {
                                          this->canonical_json = nlohmann::json(msg);
                                  }
                          }
                          this->acceptVerificationRequest();
                  } else {
                          this->cancelVerification(DeviceVerificationFlow::Error::UnknownMethod);
                  }
          });

        connect(ChatPage::instance(),
                &ChatPage::recievedDeviceVerificationAccept,
                this,
                [this](const mtx::events::msg::KeyVerificationAccept &msg) {
                        if (msg.transaction_id.has_value()) {
                                if (msg.transaction_id.value() != this->transaction_id)
                                        return;
                        } else if (msg.relates_to.has_value()) {
                                if (msg.relates_to.value().event_id != this->relation.event_id)
                                        return;
                        }
                        if ((msg.key_agreement_protocol == "curve25519-hkdf-sha256") &&
                            (msg.hash == "sha256") &&
                            (msg.message_authentication_code == "hkdf-hmac-sha256")) {
                                this->commitment = msg.commitment;
                                if (std::find(msg.short_authentication_string.begin(),
                                              msg.short_authentication_string.end(),
                                              mtx::events::msg::SASMethods::Emoji) !=
                                    msg.short_authentication_string.end()) {
                                        this->method = DeviceVerificationFlow::Method::Emoji;
                                } else {
                                        this->method = DeviceVerificationFlow::Method::Decimal;
                                }
                                this->mac_method = msg.message_authentication_code;
                                this->sendVerificationKey();
                        } else {
                                this->cancelVerification(
                                  DeviceVerificationFlow::Error::UnknownMethod);
                        }
                });

        connect(ChatPage::instance(),
                &ChatPage::recievedDeviceVerificationCancel,
                this,
                [this](const mtx::events::msg::KeyVerificationCancel &msg) {
                        if (msg.transaction_id.has_value()) {
                                if (msg.transaction_id.value() != this->transaction_id)
                                        return;
                        } else if (msg.relates_to.has_value()) {
                                if (msg.relates_to.value().event_id != this->relation.event_id)
                                        return;
                        }
                        this->deleteLater();
                        emit verificationCanceled();
                });

        connect(ChatPage::instance(),
                &ChatPage::recievedDeviceVerificationKey,
                this,
                [this](const mtx::events::msg::KeyVerificationKey &msg) {
                        if (msg.transaction_id.has_value()) {
                                if (msg.transaction_id.value() != this->transaction_id)
                                        return;
                        } else if (msg.relates_to.has_value()) {
                                if (msg.relates_to.value().event_id != this->relation.event_id)
                                        return;
                        }
                        this->sas->set_their_key(msg.key);
                        std::string info;
                        if (this->sender == true) {
                                info = "MATRIX_KEY_VERIFICATION_SAS|" +
                                       http::client()->user_id().to_string() + "|" +
                                       http::client()->device_id() + "|" + this->sas->public_key() +
                                       "|" + this->toClient.to_string() + "|" +
                                       this->deviceId.toStdString() + "|" + msg.key + "|" +
                                       this->transaction_id;
                        } else {
                                info = "MATRIX_KEY_VERIFICATION_SAS|" + this->toClient.to_string() +
                                       "|" + this->deviceId.toStdString() + "|" + msg.key + "|" +
                                       http::client()->user_id().to_string() + "|" +
                                       http::client()->device_id() + "|" + this->sas->public_key() +
                                       "|" + this->transaction_id;
                        }

                        if (this->method == DeviceVerificationFlow::Method::Emoji) {
                                std::cout << info << std::endl;
                                this->sasList = this->sas->generate_bytes_emoji(info);
                        } else if (this->method == DeviceVerificationFlow::Method::Decimal) {
                                this->sasList = this->sas->generate_bytes_decimal(info);
                        }

                        if (this->sender == false) {
                                emit this->verificationRequestAccepted(this->method);
                                this->sendVerificationKey();
                        } else {
                                if (this->commitment ==
                                    mtx::crypto::bin2base64_unpadded(
                                      mtx::crypto::sha256(msg.key + this->canonical_json.dump()))) {
                                        emit this->verificationRequestAccepted(this->method);
                                } else {
                                        this->cancelVerification(
                                          DeviceVerificationFlow::Error::MismatchedCommitment);
                                }
                        }
                });

        connect(
          ChatPage::instance(),
          &ChatPage::recievedDeviceVerificationMac,
          this,
          [this](const mtx::events::msg::KeyVerificationMac &msg) {
                  if (msg.transaction_id.has_value()) {
                          if (msg.transaction_id.value() != this->transaction_id)
                                  return;
                  } else if (msg.relates_to.has_value()) {
                          if (msg.relates_to.value().event_id != this->relation.event_id)
                                  return;
                  }
                  std::string info = "MATRIX_KEY_VERIFICATION_MAC" + this->toClient.to_string() +
                                     this->deviceId.toStdString() +
                                     http::client()->user_id().to_string() +
                                     http::client()->device_id() + this->transaction_id;

                  std::vector<std::string> key_list;
                  std::string key_string;
                  for (auto mac : msg.mac) {
                          key_string += mac.first + ",";
                          if (device_keys[mac.first] != "") {
                                  if (mac.second ==
                                      this->sas->calculate_mac(this->device_keys[mac.first],
                                                               info + mac.first)) {
                                  } else {
                                          this->cancelVerification(
                                            DeviceVerificationFlow::Error::KeyMismatch);
                                          return;
                                  }
                          }
                  }
                  key_string = key_string.substr(0, key_string.length() - 1);
                  if (msg.keys == this->sas->calculate_mac(key_string, info + "KEY_IDS")) {
                          // uncomment this in future to be compatible with the
                          // MSC2366 this->sendVerificationDone(); and remove the
                          // below line
                          if (this->isMacVerified == true) {
                                  this->acceptDevice();
                          } else
                                  this->isMacVerified = true;
                  } else {
                          this->cancelVerification(DeviceVerificationFlow::Error::KeyMismatch);
                  }
          });

        connect(ChatPage::instance(),
                &ChatPage::recievedDeviceVerificationReady,
                this,
                [this](const mtx::events::msg::KeyVerificationReady &msg) {
                        if (!sender) {
                                if (msg.from_device != http::client()->device_id()) {
                                        this->deleteLater();
                                        emit verificationCanceled();
                                }

                                return;
                        }

                        if (msg.transaction_id.has_value()) {
                                if (msg.transaction_id.value() != this->transaction_id)
                                        return;
                        } else if ((msg.relates_to.has_value() && sender)) {
                                if (msg.relates_to.value().event_id != this->relation.event_id)
                                        return;
                                else {
                                        this->deviceId = QString::fromStdString(msg.from_device);
                                }
                        }
                        this->startVerificationRequest();
                });

        connect(ChatPage::instance(),
                &ChatPage::recievedDeviceVerificationDone,
                this,
                [this](const mtx::events::msg::KeyVerificationDone &msg) {
                        if (msg.transaction_id.has_value()) {
                                if (msg.transaction_id.value() != this->transaction_id)
                                        return;
                        } else if (msg.relates_to.has_value()) {
                                if (msg.relates_to.value().event_id != this->relation.event_id)
                                        return;
                        }
                        this->acceptDevice();
                });

        timeout->start(TIMEOUT);
}

QString
DeviceVerificationFlow::getTransactionId()
{
        return QString::fromStdString(this->transaction_id);
}

QString
DeviceVerificationFlow::getUserId()
{
        return this->userId;
}

QString
DeviceVerificationFlow::getDeviceId()
{
        return this->deviceId;
}

DeviceVerificationFlow::Method
DeviceVerificationFlow::getMethod()
{
        return this->method;
}

DeviceVerificationFlow::Type
DeviceVerificationFlow::getType()
{
        return this->type;
}

bool
DeviceVerificationFlow::getSender()
{
        return this->sender;
}

std::vector<int>
DeviceVerificationFlow::getSasList()
{
        return this->sasList;
}

void
DeviceVerificationFlow::setTransactionId(QString transaction_id_)
{
        this->transaction_id = transaction_id_.toStdString();
}

void
DeviceVerificationFlow::setUserId(QString userID)
{
        this->userId   = userID;
        this->toClient = mtx::identifiers::parse<mtx::identifiers::User>(userID.toStdString());

        auto user_id = userID.toStdString();
        ChatPage::instance()->query_keys(
          user_id, [user_id, this](const UserKeyCache &res, mtx::http::RequestErr err) {
                  this->callback_fn(res, err, user_id);
          });
}

void
DeviceVerificationFlow::setDeviceId(QString deviceID)
{
        this->deviceId = deviceID;
}

void
DeviceVerificationFlow::setMethod(DeviceVerificationFlow::Method method_)
{
        this->method = method_;
}

void
DeviceVerificationFlow::setType(Type type_)
{
        this->type = type_;
}

void
DeviceVerificationFlow::setSender(bool sender_)
{
        this->sender = sender_;
        if (this->sender)
                this->transaction_id = http::client()->generate_txn_id();
}

void
DeviceVerificationFlow::setEventId(std::string event_id_)
{
        this->relation.rel_type = mtx::common::RelationType::Reference;
        this->relation.event_id = event_id_;
        this->transaction_id    = event_id_;
}

//! accepts a verification
void
DeviceVerificationFlow::acceptVerificationRequest()
{
        mtx::events::msg::KeyVerificationAccept req;

        req.method                      = mtx::events::msg::VerificationMethods::SASv1;
        req.key_agreement_protocol      = "curve25519-hkdf-sha256";
        req.hash                        = "sha256";
        req.message_authentication_code = "hkdf-hmac-sha256";
        if (this->method == DeviceVerificationFlow::Method::Emoji)
                req.short_authentication_string = {mtx::events::msg::SASMethods::Emoji};
        else if (this->method == DeviceVerificationFlow::Method::Decimal)
                req.short_authentication_string = {mtx::events::msg::SASMethods::Decimal};
        req.commitment = mtx::crypto::bin2base64_unpadded(
          mtx::crypto::sha256(this->sas->public_key() + this->canonical_json.dump()));

        if (this->type == DeviceVerificationFlow::Type::ToDevice) {
                mtx::requests::ToDeviceMessages<mtx::events::msg::KeyVerificationAccept> body;
                req.transaction_id = this->transaction_id;

                body[this->toClient][this->deviceId.toStdString()] = req;

                http::client()->send_to_device<mtx::events::msg::KeyVerificationAccept>(
                  this->transaction_id, body, [](mtx::http::RequestErr err) {
                          if (err)
                                  nhlog::net()->warn("failed to accept verification request: {} {}",
                                                     err->matrix_error.error,
                                                     static_cast<int>(err->status_code));
                  });
        } else if (this->type == DeviceVerificationFlow::Type::RoomMsg && model_) {
                req.relates_to = this->relation;
                (model_)->sendMessageEvent(req, mtx::events::EventType::KeyVerificationAccept);
        }
}
//! responds verification request
void
DeviceVerificationFlow::sendVerificationReady()
{
        mtx::events::msg::KeyVerificationReady req;

        req.from_device = http::client()->device_id();
        req.methods     = {mtx::events::msg::VerificationMethods::SASv1};

        if (this->type == DeviceVerificationFlow::Type::ToDevice) {
                req.transaction_id = this->transaction_id;
                mtx::requests::ToDeviceMessages<mtx::events::msg::KeyVerificationReady> body;

                body[this->toClient][this->deviceId.toStdString()] = req;

                http::client()->send_to_device<mtx::events::msg::KeyVerificationReady>(
                  this->transaction_id, body, [](mtx::http::RequestErr err) {
                          if (err)
                                  nhlog::net()->warn("failed to send verification ready: {} {}",
                                                     err->matrix_error.error,
                                                     static_cast<int>(err->status_code));
                  });
        } else if (this->type == DeviceVerificationFlow::Type::RoomMsg && model_) {
                req.relates_to = this->relation;
                (model_)->sendMessageEvent(req, mtx::events::EventType::KeyVerificationReady);
        }
}
//! accepts a verification
void
DeviceVerificationFlow::sendVerificationDone()
{
        mtx::events::msg::KeyVerificationDone req;

        if (this->type == DeviceVerificationFlow::Type::ToDevice) {
                mtx::requests::ToDeviceMessages<mtx::events::msg::KeyVerificationDone> body;
                req.transaction_id = this->transaction_id;

                body[this->toClient][this->deviceId.toStdString()] = req;

                http::client()->send_to_device<mtx::events::msg::KeyVerificationDone>(
                  this->transaction_id, body, [](mtx::http::RequestErr err) {
                          if (err)
                                  nhlog::net()->warn("failed to send verification done: {} {}",
                                                     err->matrix_error.error,
                                                     static_cast<int>(err->status_code));
                  });
        } else if (this->type == DeviceVerificationFlow::Type::RoomMsg && model_) {
                req.relates_to = this->relation;
                (model_)->sendMessageEvent(req, mtx::events::EventType::KeyVerificationDone);
        }
}
//! starts the verification flow
void
DeviceVerificationFlow::startVerificationRequest()
{
        mtx::events::msg::KeyVerificationStart req;

        req.from_device                  = http::client()->device_id();
        req.method                       = mtx::events::msg::VerificationMethods::SASv1;
        req.key_agreement_protocols      = {"curve25519-hkdf-sha256"};
        req.hashes                       = {"sha256"};
        req.message_authentication_codes = {"hkdf-hmac-sha256"};
        req.short_authentication_string  = {mtx::events::msg::SASMethods::Decimal,
                                           mtx::events::msg::SASMethods::Emoji};

        if (this->type == DeviceVerificationFlow::Type::ToDevice) {
                mtx::requests::ToDeviceMessages<mtx::events::msg::KeyVerificationStart> body;
                req.transaction_id                                 = this->transaction_id;
                this->canonical_json                               = nlohmann::json(req);
                body[this->toClient][this->deviceId.toStdString()] = req;

                http::client()->send_to_device<mtx::events::msg::KeyVerificationStart>(
                  this->transaction_id, body, [body](mtx::http::RequestErr err) {
                          if (err)
                                  nhlog::net()->warn("failed to start verification request: {} {}",
                                                     err->matrix_error.error,
                                                     static_cast<int>(err->status_code));
                  });
        } else if (this->type == DeviceVerificationFlow::Type::RoomMsg && model_) {
                req.relates_to       = this->relation;
                this->canonical_json = nlohmann::json(req);
                (model_)->sendMessageEvent(req, mtx::events::EventType::KeyVerificationStart);
        }
}
//! sends a verification request
void
DeviceVerificationFlow::sendVerificationRequest()
{
        mtx::events::msg::KeyVerificationRequest req;

        req.from_device = http::client()->device_id();
        req.methods     = {mtx::events::msg::VerificationMethods::SASv1};

        if (this->type == DeviceVerificationFlow::Type::ToDevice) {
                QDateTime currentTime = QDateTime::currentDateTimeUtc();

                req.transaction_id = this->transaction_id;
                req.timestamp      = (uint64_t)currentTime.toMSecsSinceEpoch();

                mtx::requests::ToDeviceMessages<mtx::events::msg::KeyVerificationRequest> body;

                body[this->toClient][this->deviceId.toStdString()] = req;

                http::client()->send_to_device<mtx::events::msg::KeyVerificationRequest>(
                  this->transaction_id, body, [](mtx::http::RequestErr err) {
                          if (err)
                                  nhlog::net()->warn("failed to send verification request: {} {}",
                                                     err->matrix_error.error,
                                                     static_cast<int>(err->status_code));
                  });
        } else if (this->type == DeviceVerificationFlow::Type::RoomMsg && model_) {
                req.to      = this->userId.toStdString();
                req.msgtype = "m.key.verification.request";
                req.body = "User is requesting to verify keys with you. However, your client does "
                           "not support this method, so you will need to use the legacy method of "
                           "key verification.";
                (model_)->sendMessageEvent(req, mtx::events::EventType::KeyVerificationRequest);
        }
}
//! cancels a verification flow
void
DeviceVerificationFlow::cancelVerification(DeviceVerificationFlow::Error error_code)
{
        mtx::events::msg::KeyVerificationCancel req;

        if (error_code == DeviceVerificationFlow::Error::UnknownMethod) {
                req.code   = "m.unknown_method";
                req.reason = "unknown method recieved";
        } else if (error_code == DeviceVerificationFlow::Error::MismatchedCommitment) {
                req.code   = "m.mismatched_commitment";
                req.reason = "commitment didn't match";
        } else if (error_code == DeviceVerificationFlow::Error::MismatchedSAS) {
                req.code   = "m.mismatched_sas";
                req.reason = "sas didn't match";
        } else if (error_code == DeviceVerificationFlow::Error::KeyMismatch) {
                req.code   = "m.key_match";
                req.reason = "keys did not match";
        } else if (error_code == DeviceVerificationFlow::Error::Timeout) {
                req.code   = "m.timeout";
                req.reason = "timed out";
        } else if (error_code == DeviceVerificationFlow::Error::User) {
                req.code   = "m.user";
                req.reason = "user cancelled the verification";
        }

        emit this->verificationCanceled();

        if (this->type == DeviceVerificationFlow::Type::ToDevice) {
                req.transaction_id = this->transaction_id;
                mtx::requests::ToDeviceMessages<mtx::events::msg::KeyVerificationCancel> body;

                body[this->toClient][deviceId.toStdString()] = req;

                http::client()->send_to_device<mtx::events::msg::KeyVerificationCancel>(
                  this->transaction_id, body, [this](mtx::http::RequestErr err) {
                          if (err)
                                  nhlog::net()->warn("failed to cancel verification request: {} {}",
                                                     err->matrix_error.error,
                                                     static_cast<int>(err->status_code));

                          this->deleteLater();
                  });
        } else if (this->type == DeviceVerificationFlow::Type::RoomMsg && model_) {
                req.relates_to = this->relation;
                (model_)->sendMessageEvent(req, mtx::events::EventType::KeyVerificationCancel);
                this->deleteLater();
        }

        // TODO : Handle Blocking user better
        // auto verified_cache = cache::getVerifiedCache(this->userId.toStdString());
        //     if (verified_cache.has_value()) {
        //             verified_cache->device_blocked.push_back(this->deviceId.toStdString());
        //             cache::setVerifiedCache(this->userId.toStdString(),
        //                                     verified_cache.value());
        //     } else {
        //             cache::setVerifiedCache(
        //               this->userId.toStdString(),
        //               DeviceVerifiedCache{{}, {}, {this->deviceId.toStdString()}});
        //     }
}
//! sends the verification key
void
DeviceVerificationFlow::sendVerificationKey()
{
        mtx::events::msg::KeyVerificationKey req;

        req.key = this->sas->public_key();

        if (this->type == DeviceVerificationFlow::Type::ToDevice) {
                mtx::requests::ToDeviceMessages<mtx::events::msg::KeyVerificationKey> body;
                req.transaction_id = this->transaction_id;

                body[this->toClient][deviceId.toStdString()] = req;

                http::client()->send_to_device<mtx::events::msg::KeyVerificationKey>(
                  this->transaction_id, body, [](mtx::http::RequestErr err) {
                          if (err)
                                  nhlog::net()->warn("failed to send verification key: {} {}",
                                                     err->matrix_error.error,
                                                     static_cast<int>(err->status_code));
                  });
        } else if (this->type == DeviceVerificationFlow::Type::RoomMsg && model_) {
                req.relates_to = this->relation;
                (model_)->sendMessageEvent(req, mtx::events::EventType::KeyVerificationKey);
        }
}

mtx::events::msg::KeyVerificationMac
key_verification_mac(mtx::crypto::SAS *sas,
                     mtx::identifiers::User sender,
                     const std::string &senderDevice,
                     mtx::identifiers::User receiver,
                     const std::string &receiverDevice,
                     const std::string &transactionId,
                     std::map<std::string, std::string> keys)
{
        mtx::events::msg::KeyVerificationMac req;

        std::string info = "MATRIX_KEY_VERIFICATION_MAC" + sender.to_string() + senderDevice +
                           receiver.to_string() + receiverDevice + transactionId;

        std::string key_list;
        bool first = true;
        for (const auto &[key_id, key] : keys) {
                req.mac[key_id] = sas->calculate_mac(key, info + key_id);

                if (!first)
                        key_list += ",";
                key_list += key_id;
                first = false;
        }

        req.keys = sas->calculate_mac(key_list, info + "KEY_IDS");

        return req;
}

//! sends the mac of the keys
void
DeviceVerificationFlow::sendVerificationMac()
{
        std::map<std::string, std::string> key_list;
        key_list["ed25519:" + http::client()->device_id()] = olm::client()->identity_keys().ed25519;

        mtx::events::msg::KeyVerificationMac req =
          key_verification_mac(sas.get(),
                               http::client()->user_id(),
                               http::client()->device_id(),
                               this->toClient,
                               this->deviceId.toStdString(),
                               this->transaction_id,
                               key_list);

        if (this->type == DeviceVerificationFlow::Type::ToDevice) {
                mtx::requests::ToDeviceMessages<mtx::events::msg::KeyVerificationMac> body;
                req.transaction_id                           = this->transaction_id;
                body[this->toClient][deviceId.toStdString()] = req;

                http::client()->send_to_device<mtx::events::msg::KeyVerificationMac>(
                  this->transaction_id, body, [this](mtx::http::RequestErr err) {
                          if (err)
                                  nhlog::net()->warn("failed to send verification MAC: {} {}",
                                                     err->matrix_error.error,
                                                     static_cast<int>(err->status_code));

                          if (this->isMacVerified == true)
                                  this->acceptDevice();
                          else
                                  this->isMacVerified = true;
                  });
        } else if (this->type == DeviceVerificationFlow::Type::RoomMsg && model_) {
                req.relates_to = this->relation;
                (model_)->sendMessageEvent(req, mtx::events::EventType::KeyVerificationMac);
        }
}
//! Completes the verification flow
void
DeviceVerificationFlow::acceptDevice()
{
        cache::markDeviceVerified(this->userId.toStdString(), this->deviceId.toStdString());

        emit deviceVerified();
        emit refreshProfile();
        this->deleteLater();
}

//! callback function to keep track of devices
void
DeviceVerificationFlow::callback_fn(const UserKeyCache &res,
                                    mtx::http::RequestErr err,
                                    std::string user_id)
{
        if (err) {
                nhlog::net()->warn("failed to query device keys: {},{}",
                                   err->matrix_error.errcode,
                                   static_cast<int>(err->status_code));
                return;
        }

        if (res.device_keys.empty() ||
            (res.device_keys.find(deviceId.toStdString()) == res.device_keys.end())) {
                nhlog::net()->warn("no devices retrieved {}", user_id);
                return;
        }

        for (const auto &[algorithm, key] : res.device_keys.at(deviceId.toStdString()).keys) {
                // TODO: Verify Signatures
                this->device_keys[algorithm] = key;
        }
}

void
DeviceVerificationFlow::unverify()
{
        cache::markDeviceUnverified(this->userId.toStdString(), this->deviceId.toStdString());

        emit refreshProfile();
}