#include <QtCore/QDebug>
#include <QtCore/QDateTime>
#include <QtCore/QTimeZone>
#include <QtCore/QXmlStreamReader>
#include <QtCore/QXmlStreamWriter>
#include <QtCore/QJsonDocument>
#include <QtCore/QJsonObject>

#if SAILFISH
#include <libwatchfish/walltimemonitor.h>
static watchfish::WallTimeMonitor *monitor = 0;
#endif

#include "sapmanager.h"
#include "sappeer.h"
#include "hostmanagerconn.h"

HostManagerConn::HostManagerConn(SAPConnection *conn, QObject *parent)
    : QObject(parent), _conn(conn), _socket(conn->getSocket(103))
{
	connect(_conn, SIGNAL(disconnected()), SLOT(deleteLater()));
	connect(_conn, SIGNAL(destroyed()), SLOT(deleteLater()));
	Q_ASSERT(_socket);
	connect(_socket, SIGNAL(connected()), SLOT(handleConnected()));
	connect(_socket, SIGNAL(messageReceived()), SLOT(handleMessageReceived()));
}

HostManagerConn::DeviceInfo HostManagerConn::parseDeviceInfo(const QString &xmlData)
{
	QXmlStreamReader r(xmlData);
	DeviceInfo info;

	// TODO

	return info;
}

void HostManagerConn::sendMessage(const QJsonObject &msg)
{
	QJsonDocument doc(msg);
	QByteArray data = doc.toJson(QJsonDocument::Compact);
	qDebug() << "Send JSON:" << data;
	_socket->send(QByteArray(2, '\0') + data);
}

void HostManagerConn::handleMessage(const QJsonObject &msg)
{
	const QString msgId = msg["msgId"].toString();
	qDebug() << "Got JSON msg" << msgId;
	if (msgId == "mgr_watch_info_res") {
		QJsonObject reply;
		QDateTime timestamp = QLocale("C").toDateTime(QString::fromLatin1(__DATE__ " " __TIME__).simplified(),
													  "MMM d yyyy HH:mm:ss");
		reply["timestamp"] = QString("%1_%2").arg(timestamp.toTime_t())
											 .arg(_conn->peer()->localName().right(2));
		reply["type"] = QLatin1String("connect");
		reply["msgId"] = QLatin1String("mgr_wearable_status_req");
		sendMessage(reply);
	} else if (msgId == "mgr_wearable_status_res") {
		// Do nothing; watch will next ask for host status
	} else if (msgId == "mgr_host_status_req") {
		QJsonObject reply;
		reply["type"] = QLatin1String("connect");
		reply["msgId"] = QLatin1String("mgr_host_status_res");
		reply["preinstalled"] = QLatin1String("true");
		reply["data"] = generateHostXml();
		sendMessage(reply);
	} else if (msgId == "mgr_status_exchange_done") {
		performTimeSync();
		QJsonObject reply;
		reply["btMac"] = _conn->peer()->localName();
		reply["msgId"] = QLatin1String("mgr_setupwizard_eula_finished_req");
		reply["isOld"] = 1;
		sendMessage(reply);
	}
}

void HostManagerConn::performTimeSync()
{
	//{"date1224":"24","datetimeepoch":"1409343828044","safety_declared":"0","locale":"es_ES","safety_voice":"1",
	// "safetyVersion":0,"timezone":"Europe\/Madrid","safety":"false","tablet":"true","dateformat":"dd-MM-yyyy",
	// "isfrominitial":true,"msgId":"mgr_sync_init_setting_req","usingCamera":"false","safety_cam":"0",
	// "datetime":"2014 08 29 22 23 48","incomingCall":"false"}

	QJsonObject msg;
	msg["msgId"] = QLatin1String("mgr_sync_init_setting_req");

	msg["safety_declared"] = QLatin1String("0");
	msg["safety_voice"] = QLatin1String("0");
	msg["safetyVersion"] = QLatin1String("0");
	msg["safety"] = QLatin1String("false");
	msg["tablet"] = QLatin1String("false");
	msg["incomingCall"] = QLatin1String("false");
	msg["usingCamera"] = QLatin1String("false");
	msg["safety_cam"] = QLatin1String("0");

	QLocale l = QLocale::system();
	msg["locale"] = l.name(); // i.e. es_ES
	msg["date1224"] = l.timeFormat().contains('a', Qt::CaseInsensitive) ? QLatin1String("12") : QLatin1String("24");
	msg["dateformat"] = QLocale::system().dateFormat(QLocale::ShortFormat);

#if SAILFISH
	// QTimeZone does not seem to work on Sailfish; use timed.
	msg["timezone"] = monitor->timezone();
#else
	msg["timezone"] = QString::fromLatin1(QTimeZone::systemTimeZoneId());
#endif

	QDateTime dt = QDateTime::currentDateTime();
	msg["datetimeepoch"] = QString::number(dt.currentMSecsSinceEpoch());
	msg["datetime"] = dt.toString("yyyy MM dd hh mm ss");

	sendMessage(msg);
}

QString HostManagerConn::generateHostXml()
{
	QString xml;
	QXmlStreamWriter w(&xml);

	w.setCodec("UTF-8");
	w.setAutoFormatting(true);

	w.writeStartDocument();

	w.writeStartElement("DeviceStatus");
	w.writeStartElement("device");
	w.writeTextElement("deviceID", _conn->peer()->localName());
	w.writeTextElement("deviceName", "none");
	w.writeTextElement("devicePlatform", "android");
	w.writeTextElement("devicePlatformVersion", "4.4.2");
	w.writeTextElement("deviceType", "Host");
	w.writeTextElement("modelNumber", "GT-I9500");
	w.writeTextElement("swVersion", "android 4.4.2");

	w.writeEmptyElement("connectivity");

#if 0
	w.writeStartElement("apps");
	SAPManager *manager = SAPManager::instance();
	foreach (const SAPManager::RegisteredApplication &app, manager->allPackages()) {
		w.writeStartElement("app");
		w.writeTextElement("name", app.name);
		w.writeTextElement("packagename", app.package);
		w.writeTextElement("version", QString::number(app.version));
		w.writeTextElement("preloaded", app.preinstalled ? QLatin1String("true") : QLatin1String("false"));
		w.writeTextElement("isAppWidget", "false");
		w.writeStartElement("features");
		w.writeTextElement("Installed", "true");
		w.writeEndElement();
		w.writeEndElement();
	}
	w.writeEndElement();
#else
	xml.append(QString::fromLatin1("<apps>"
								   "<app><name>Actualizar el software del Gear</name><packagename>com.sec.android.fotaprovider</packagename><version>2</version><preloaded>false</preloaded><isAppWidget>false</isAppWidget><features/></app>"
								   "<app><name>ConnectionManager</name><packagename>com.sec.android.service.connectionmanager</packagename><version>1004</version><preloaded>false</preloaded><isAppWidget>false</isAppWidget><features/></app>"
								   "<app><name>goproviders</name><packagename>com.samsung.accessory.goproviders</packagename><version>61</version><preloaded>false</preloaded><isAppWidget>false</isAppWidget><features/></app>"
								   "<app><name>SAFileTransferCore</name><packagename>com.samsung.accessory.safiletransfer</packagename><version>1</version><preloaded>false</preloaded><isAppWidget>false</isAppWidget><features/></app>"
								   "<app><name>SANotiProvider</name><packagename>com.samsung.accessory.sanotiprovider</packagename><version>1</version><preloaded>false</preloaded><isAppWidget>false</isAppWidget><features/></app>"
								   "<app><name>saproviders</name><packagename>com.samsung.accessory.saproviders</packagename><version>64</version><preloaded>false</preloaded><isAppWidget>false</isAppWidget><features/></app><app><name>TextTemplateProvider</name><packagename>com.samsung.accessory.texttemplateprovider</packagename><version>1300</version><preloaded>false</preloaded><isAppWidget>false</isAppWidget><features/></app>"
								   "<app><packagename>com.samsung.accessory.saproviders</packagename><version>64</version><features><RequiringPackage>com.samsung.w-calendar2</RequiringPackage><Installed>true</Installed></features></app><app><packagename>com.samsung.accessory.goproviders</packagename><version>61</version><features><RequiringPackage>com.samsung.wfmd</RequiringPackage><Installed>true</Installed></features></app>"
								   "<app><packagename>com.sec.android.weatherprovider</packagename><features><RequiringPackage>com.samsung.weather</RequiringPackage><Installed>false</Installed></features></app>"
								   "<app><packagename>com.samsung.accessory.goproviders</packagename><version>61</version><features><RequiringPackage>com.samsung.w-contacts2</RequiringPackage><Installed>true</Installed></features></app><app><packagename>com.samsung.accessory.saproviders</packagename><version>64</version><features><RequiringPackage>com.samsung.w-media-controller</RequiringPackage><Installed>true</Installed></features></app>"
								   "<app><packagename>com.samsung.accessory.saproviders</packagename><version>64</version><features><RequiringPackage>com.samsung.alarm</RequiringPackage><Installed>true</Installed></features></app><app><packagename>com.samsung.accessory.saproviders</packagename><version>64</version><features><RequiringPackage>com.samsung.message</RequiringPackage><Installed>true</Installed></features></app>"
								   "<app><packagename>com.samsung.accessory.saproviders</packagename><version>64</version><features><RequiringPackage>com.samsung.w-logs2</RequiringPackage><Installed>true</Installed></features></app><app><packagename>com.samsung.accessory.saproviders</packagename><version>64</version><features><RequiringPackage>com.samsung.idle-clock-event</RequiringPackage><Installed>true</Installed></features></app>"
								   "<app><packagename>com.sec.android.weatherprovider</packagename><features><RequiringPackage>com.samsung.w-idle-clock-weather2</RequiringPackage><Installed>false</Installed></features></app><app><packagename>com.samsung.accessory.saproviders</packagename><version>64</version><features><RequiringPackage>com.samsung.idle-clock-dual</RequiringPackage><Installed>true</Installed></features></app>"
								   "<app><packagename>com.samsung.accessory.saproviders</packagename><version>64</version><features><RequiringPackage>com.samsung.svoice-w</RequiringPackage><Installed>true</Installed></features></app>"
								   "</apps>"));
#endif

	w.writeStartElement("deviceFeature");
	w.writeTextElement("telephony", "true");
	w.writeTextElement("messaging", "true");
	w.writeTextElement("tablet", "false");
	w.writeTextElement("autolock", "true");
	w.writeTextElement("smartrelay", "true");
	w.writeTextElement("safetyassistance", "false");
	w.writeTextElement("vendor", "Samsung");
	w.writeEndElement();

	w.writeEmptyElement("security");
	w.writeEmptyElement("notification");
	w.writeEmptyElement("settings");

	w.writeEndElement();

	w.writeEndElement();

	w.writeEndDocument();

	return xml;
}

void HostManagerConn::handleConnected()
{
	qDebug() << "Manager socket now connected!";

#if SAILFISH
	if (!monitor) {
		monitor = new watchfish::WallTimeMonitor;
	}
#endif

	QJsonObject obj;
	obj["btMac"] = _conn->peer()->localName();
	obj["msgId"] = QLatin1String("mgr_watch_info_req");
	obj["hmVer"] = QLatin1String("2.0.14041404");
	sendMessage(obj);
}

void HostManagerConn::handleMessageReceived()
{
	QByteArray data = _socket->receive();

	if (data.size() < 4) {
		qWarning() << "Invalid HostManager message received";
		return;
	}

	data.remove(0, 2); // Remove still-unknown header

	qDebug() << "Got JSON:" << QString::fromUtf8(data);

	QJsonParseError error;
	QJsonDocument json = QJsonDocument::fromJson(data, &error);

	if (json.isObject()) {
		handleMessage(json.object());
	} else {
		qWarning() << "Cannot parse JSON msg:" << error.errorString();
	}
}