/*
    Copyright (C) 2020-21 Sebastian J. Wolf and other contributors

    This file is part of Fernschreiber.

    Fernschreiber is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Fernschreiber is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Fernschreiber. If not, see <http://www.gnu.org/licenses/>.
*/

#include "fernschreiberutils.h"
#include <QMap>
#include <QVariant>
#include <QAudioEncoderSettings>
#include <QStandardPaths>
#include <QDir>
#include <QDirIterator>
#include <QFile>
#include <QUrl>
#include <QDateTime>
#include <QGeoCoordinate>
#include <QGeoLocation>

#define DEBUG_MODULE FernschreiberUtils
#include "debuglog.h"

FernschreiberUtils::FernschreiberUtils(QObject *parent) : QObject(parent)
{
    LOG("Initializing audio recorder...");

    QString temporaryDirectoryPath = this->getTemporaryDirectoryPath();
    QDir temporaryDirectory(temporaryDirectoryPath);
    if (!temporaryDirectory.exists()) {
        temporaryDirectory.mkpath(temporaryDirectoryPath);
    }

    QAudioEncoderSettings encoderSettings;
    encoderSettings.setCodec("audio/vorbis");
    encoderSettings.setChannelCount(1);
    encoderSettings.setQuality(QMultimedia::LowQuality);
    this->audioRecorder.setEncodingSettings(encoderSettings);
    this->audioRecorder.setContainerFormat("ogg");

    QMediaRecorder::Status audioRecorderStatus = this->audioRecorder.status();
    this->handleAudioRecorderStatusChanged(audioRecorderStatus);

    connect(&audioRecorder, SIGNAL(durationChanged(qlonglong)), this, SIGNAL(voiceNoteDurationChanged(qlonglong)));
    connect(&audioRecorder, SIGNAL(statusChanged(QMediaRecorder::Status)), this, SLOT(handleAudioRecorderStatusChanged(QMediaRecorder::Status)));

    this->geoPositionInfoSource = QGeoPositionInfoSource::createDefaultSource(this);
    if (this->geoPositionInfoSource) {
        LOG("Geolocation successfully initialized...");
        this->geoPositionInfoSource->setUpdateInterval(5000);
        connect(geoPositionInfoSource, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(handleGeoPositionUpdated(QGeoPositionInfo)));
    } else {
        LOG("Unable to initialize geolocation!");
    }
}

FernschreiberUtils::~FernschreiberUtils()
{
    this->cleanUp();
}

QString FernschreiberUtils::getMessageShortText(TDLibWrapper *tdLibWrapper, const QVariantMap &messageContent, const bool isChannel, const qlonglong currentUserId, const QVariantMap &messageSender)
{
    if (messageContent.isEmpty()) {
        return QString();
    }

    const bool myself = !isChannel && (messageSender.value("@type").toString() == "messageSenderUser" && messageSender.value("user_id").toLongLong() == currentUserId);

    QString contentType = messageContent.value("@type").toString();

    if (contentType == "messageText") {
        return messageContent.value("text").toMap().value("text").toString();
    }
    if (contentType == "messageSticker") {
        return tr("Sticker: %1").arg(messageContent.value("sticker").toMap().value("emoji").toString());
    }
    if (contentType == "messagePhoto") {
        return myself ? tr("sent a picture", "myself") : tr("sent a picture");
    }
    if (contentType == "messageVideo") {
        return myself ? tr("sent a video", "myself") : tr("sent a video");
    }
    if (contentType == "messageAnimation") {
        return myself ? tr("sent an animation", "myself") : tr("sent an animation");
    }
    if (contentType == "messageAudio") {
        return myself ? tr("sent an audio", "myself") : tr("sent an audio");
    }
    if (contentType == "messageVoiceNote") {
        return myself ? tr("sent a voice note", "myself") : tr("sent a voice note");
    }
    if (contentType == "messageDocument") {
        return myself ? tr("sent a document", "myself") : tr("sent a document");
    }
    if (contentType == "messageLocation") {
        return myself ? tr("sent a location", "myself") : tr("sent a location");
    }
    if (contentType == "messageVenue") {
        return myself ? tr("sent a venue", "myself") : tr("sent a venue");
    }
    if (contentType == "messageContactRegistered") {
        return myself ? tr("have registered with Telegram", "myself") : tr("has registered with Telegram");
    }
    if (contentType == "messageChatJoinByLink") {
        return myself ? tr("joined this chat", "myself") : tr("joined this chat");
    }
    if (contentType == "messageChatAddMembers") {
        if (messageSender.value("@type").toString() == "messageSenderUser" && messageSender.value("user_id").toLongLong() == messageContent.value("member_user_ids").toList().at(0).toLongLong()) {
            return myself ? tr("were added to this chat", "myself") : tr("was added to this chat");
        } else {
            QVariantList memberUserIds = messageContent.value("member_user_ids").toList();
            QString addedUserNames;
            for (int i = 0; i < memberUserIds.size(); i++) {
                if (i > 0) {
                    addedUserNames += ", ";
                }
                addedUserNames += getUserName(tdLibWrapper->getUserInformation(memberUserIds.at(i).toString()));
            }
            return myself ? tr("have added %1 to the chat", "myself").arg(addedUserNames) : tr("has added %1 to the chat").arg(addedUserNames);
        }
    }
    if (contentType == "messageChatDeleteMember") {
        if (messageSender.value("@type").toString() == "messageSenderUser" && messageSender.value("user_id").toLongLong() == messageContent.value("user_id").toLongLong()) {
            return myself ? tr("left this chat", "myself") : tr("left this chat");
        } else {
            return myself ? tr("have removed %1 from the chat", "myself").arg(getUserName(tdLibWrapper->getUserInformation(messageContent.value("user_id").toString()))) : tr("has removed %1 from the chat").arg(getUserName(tdLibWrapper->getUserInformation(messageContent.value("user_id").toString())));
        }
    }
    if (contentType == "messageChatChangeTitle") {
        return myself ? tr("changed the chat title", "myself") : tr("changed the chat title");
    }
    if (contentType == "messagePoll") {
        if(messageContent.value("poll").toMap().value("type").toMap().value("@type").toString() == "pollTypeQuiz") {
            return myself ? tr("sent a quiz", "myself") : tr("sent a quiz");
        }
        return myself ? tr("sent a poll", "myself") : tr("sent a poll");
    }
    if (contentType == "messageBasicGroupChatCreate" || contentType == "messageSupergroupChatCreate") {
        return myself ? tr("created this group", "myself") : tr("created this group");
    }
    if (contentType == "messageChatChangePhoto") {
        return myself ? tr("changed the chat photo", "myself") : tr("changed the chat photo");
    }
    if (contentType == "messageChatDeletePhoto") {
        return myself ? tr("deleted the chat photo", "myself") : tr("deleted the chat photo");
    }
    if (contentType == "messageChatSetTtl") {
        return myself ? tr("changed the secret chat TTL setting", "myself") : tr("changed the secret chat TTL setting");
    }
    if (contentType == "messageChatUpgradeFrom" || contentType == "messageChatUpgradeTo") {
        return myself ? tr("upgraded this group to a supergroup", "myself") : tr("upgraded this group to a supergroup");
    }
    if (contentType == "messageCustomServiceAction") {
        return messageContent.value("text").toString();
    }
    if (contentType == "messagePinMessage") {
        return myself ? tr("changed the pinned message", "myself") : tr("changed the pinned message");
    }
    if (contentType == "messageExpiredPhoto") {
        return myself ? tr("sent a self-destructing photo that is expired", "myself") : tr("sent a self-destructing photo that is expired");
    }
    if (contentType == "messageExpiredVideo") {
        return myself ? tr("sent a self-destructing video that is expired", "myself") : tr("sent a self-destructing video that is expired");
    }
    if (contentType == "messageScreenshotTaken") {
        return myself ? tr("created a screenshot in this chat", "myself") : tr("created a screenshot in this chat");
    }
    if (contentType == "messageUnsupported") {
        return myself ? tr("sent an unsupported message", "myself") : tr("sent an unsupported message");
    }

    return myself ? tr("sent an unsupported message: %1", "myself").arg(contentType.mid(7)) : tr("sent an unsupported message: %1").arg(contentType.mid(7));
}

QString FernschreiberUtils::getUserName(const QVariantMap &userInformation)
{
    const QString firstName = userInformation.value("first_name").toString();
    const QString lastName = userInformation.value("last_name").toString();
    return QString(firstName + " " + lastName).trimmed();
}

void FernschreiberUtils::startRecordingVoiceNote()
{
    LOG("Start recording voice note...");
    QDateTime thisIsNow = QDateTime::currentDateTime();
    this->audioRecorder.setOutputLocation(QUrl::fromLocalFile(this->getTemporaryDirectoryPath() + "/voicenote-" + thisIsNow.toString("yyyy-MM-dd-HH-mm-ss") + ".ogg"));
    this->audioRecorder.setVolume(1);
    this->audioRecorder.record();
}

void FernschreiberUtils::stopRecordingVoiceNote()
{
    LOG("Stop recording voice note...");
    this->audioRecorder.stop();
}

QString FernschreiberUtils::voiceNotePath()
{
    return this->audioRecorder.outputLocation().toLocalFile();
}

FernschreiberUtils::VoiceNoteRecordingState FernschreiberUtils::getVoiceNoteRecordingState()
{
    return this->voiceNoteRecordingState;
}

void FernschreiberUtils::startGeoLocationUpdates()
{
    if (this->geoPositionInfoSource) {
        this->geoPositionInfoSource->startUpdates();
    }
}

void FernschreiberUtils::stopGeoLocationUpdates()
{
    if (this->geoPositionInfoSource) {
        this->geoPositionInfoSource->stopUpdates();
    }
}

bool FernschreiberUtils::supportsGeoLocation()
{
    return this->geoPositionInfoSource;
}

void FernschreiberUtils::handleAudioRecorderStatusChanged(QMediaRecorder::Status status)
{
    LOG("Audio recorder status changed:" << status);
    switch (status) {
    case QMediaRecorder::UnavailableStatus:
    case QMediaRecorder::UnloadedStatus:
    case QMediaRecorder::LoadingStatus:
        this->voiceNoteRecordingState = VoiceNoteRecordingState::Unavailable;
        break;
    case QMediaRecorder::LoadedStatus:
    case QMediaRecorder::PausedStatus:
        this->voiceNoteRecordingState = VoiceNoteRecordingState::Ready;
        break;
    case QMediaRecorder::StartingStatus:
        this->voiceNoteRecordingState = VoiceNoteRecordingState::Starting;
        break;
    case QMediaRecorder::FinalizingStatus:
        this->voiceNoteRecordingState = VoiceNoteRecordingState::Stopping;
        break;
    case QMediaRecorder::RecordingStatus:
        this->voiceNoteRecordingState = VoiceNoteRecordingState::Recording;
        break;
    }
    emit voiceNoteRecordingStateChanged(this->voiceNoteRecordingState);
}

void FernschreiberUtils::handleGeoPositionUpdated(const QGeoPositionInfo &info)
{
    LOG("Geo position was updated");
    QVariantMap positionInformation;
    if (info.hasAttribute(QGeoPositionInfo::HorizontalAccuracy)) {
        positionInformation.insert("horizontalAccuracy", info.attribute(QGeoPositionInfo::HorizontalAccuracy));
    } else {
        positionInformation.insert("horizontalAccuracy", 0);
    }
    if (info.hasAttribute(QGeoPositionInfo::VerticalAccuracy)) {
        positionInformation.insert("verticalAccuracy", info.attribute(QGeoPositionInfo::VerticalAccuracy));
    } else {
        positionInformation.insert("verticalAccuracy", 0);
    }
    QGeoCoordinate geoCoordinate = info.coordinate();
    positionInformation.insert("latitude", geoCoordinate.latitude());
    positionInformation.insert("longitude", geoCoordinate.longitude());


    emit newPositionInformation(positionInformation);
}

void FernschreiberUtils::cleanUp()
{
    if (this->geoPositionInfoSource) {
        this->geoPositionInfoSource->stopUpdates();
    }
    QString temporaryDirectoryPath = this->getTemporaryDirectoryPath();
    QDirIterator temporaryDirectoryIterator(temporaryDirectoryPath, QDir::Files | QDir::NoDotAndDotDot | QDir::NoSymLinks, QDirIterator::Subdirectories);
    while (temporaryDirectoryIterator.hasNext()) {
        QString nextFilePath = temporaryDirectoryIterator.next();
        if (QFile::remove(nextFilePath)) {
            LOG("Temporary file removed " << nextFilePath);
        } else {
            LOG("Error removing temporary file " << nextFilePath);
        }
    }
}

QString FernschreiberUtils::getTemporaryDirectoryPath()
{
    return QStandardPaths::writableLocation(QStandardPaths::TempLocation) +  + "/harbour-fernschreiber";
}