#include "qmlmanager.h"
#include <QUrl>
#include <QSettings>
#include <QDebug>

#include "qt-models/divelistmodel.h"
#include "divelist.h"
#include "pref.h"
#include "qthelper.h"
#include "qt-gui.h"

QMLManager *QMLManager::m_instance = NULL;

static void appendTextToLogStandalone(const char *text)
{
	QMLManager *mgr = QMLManager::instance();
	if (mgr)
		mgr->appendTextToLog(QString(text));
}

QMLManager::QMLManager() :
	m_locationServiceEnabled(false)
{
	m_instance = this;
	// create location manager service
	locationProvider = new GpsLocation(&appendTextToLogStandalone, this);

	// Initialize cloud credentials.
	setCloudUserName(prefs.cloud_storage_email);
	setCloudPassword(prefs.cloud_storage_password);
	setSaveCloudPassword(prefs.save_password_local);
	// if the cloud credentials are valid, we should get the GPS Webservice ID as well
	if (!same_string(prefs.cloud_storage_email, "") &&
	    !same_string(prefs.cloud_storage_password, "") &&
	    same_string(prefs.userid, ""))
		locationProvider->getUserid(prefs.cloud_storage_email, prefs.cloud_storage_password);

	setDistanceThreshold(prefs.distance_threshold);
	setTimeThreshold(prefs.time_threshold / 60);
}

QMLManager::~QMLManager()
{
	m_instance = NULL;
}

QMLManager *QMLManager::instance()
{
	return m_instance;
}

void QMLManager::savePreferences()
{
	QSettings s;
	s.beginGroup("LocationService");
	s.setValue("time_threshold", timeThreshold() * 60);
	prefs.time_threshold = timeThreshold() * 60;
	s.setValue("distance_threshold", distanceThreshold());
	prefs.distance_threshold = distanceThreshold();
}

void QMLManager::saveCloudCredentials()
{
	QSettings s;
	bool cloudCredentialsChanged = false;
	s.beginGroup("CloudStorage");
	s.setValue("email", cloudUserName());
	s.setValue("save_password_local", saveCloudPassword());
	if (saveCloudPassword())
		s.setValue("password", cloudPassword());
	s.sync();
	if (!same_string(prefs.cloud_storage_email, qPrintable(cloudUserName()))) {
		free(prefs.cloud_storage_email);
		prefs.cloud_storage_email = strdup(qPrintable(cloudUserName()));
		cloudCredentialsChanged = true;
	}
	if (saveCloudPassword() != prefs.save_password_local)
		prefs.save_password_local = saveCloudPassword();

	cloudCredentialsChanged |= !same_string(prefs.cloud_storage_password, qPrintable(cloudPassword()));

	if (saveCloudPassword()) {
		if (!same_string(prefs.cloud_storage_password, qPrintable(cloudPassword()))) {
			free(prefs.cloud_storage_password);
			prefs.cloud_storage_password = strdup(qPrintable(cloudPassword()));
		}
	}
	// if the cloud credentials are valid, we should get the GPS Webservice ID as well
	if (!same_string(prefs.cloud_storage_email, "") &&
	    !same_string(prefs.cloud_storage_password, "")) {
		if (same_string(prefs.userid, "") || cloudCredentialsChanged) {
			QString userid = locationProvider->getUserid(prefs.cloud_storage_email, prefs.cloud_storage_password);
			if (!userid.isEmpty()) {
				// overwrite the existing userid
				free(prefs.userid);
				prefs.userid = strdup(qPrintable(userid));
				s.setValue("subsurface_webservice_uid", prefs.userid);
			}
		}
	}
	if (cloudCredentialsChanged)
		loadDives();
}

void QMLManager::loadDives()
{
	if (same_string(prefs.cloud_storage_email, "") || same_string(prefs.cloud_storage_password, "")) {
		appendTextToLog("Unable to load dives; cloud storage credentials missing");
		return;
	}

	appendTextToLog("Loading dives...");
	QString url;
	if (getCloudURL(url)) {
		appendTextToLog(get_error_string());
		return;
	}
	clear_dive_file_data();

	QByteArray fileNamePrt  = QFile::encodeName(url);
	int error = parse_file(fileNamePrt.data());
	if (!error) {
		report_error("filename is now %s", fileNamePrt.data());
		const char *error_string = get_error_string();
		appendTextToLog(error_string);
		set_filename(fileNamePrt.data(), true);
	} else {
		report_error("failed to open file %s", fileNamePrt.data());
		const char *error_string = get_error_string();
		appendTextToLog(error_string);
		return;
	}
	process_dives(false, false);

	int i;
	struct dive *d;

	DiveListModel::instance()->clear();
	for_each_dive(i, d) {
		DiveListModel::instance()->addDive(d);
	}
	appendTextToLog(QString("%1 dives loaded").arg(i));
	setLoadFromCloud(true);
}

void QMLManager::commitChanges(QString diveId, QString suit, QString buddy, QString diveMaster, QString notes)
{
	struct dive *d = get_dive_by_uniq_id(diveId.toInt());
	bool diveChanged = false;

	if (d->suit != suit.toUtf8().data()) {
		diveChanged = true;
		free(d->suit);
		d->suit = strdup(suit.toUtf8().data());
	}
	if (d->buddy != buddy.toUtf8().data()) {
		diveChanged = true;
		free(d->buddy);
		d->buddy = strdup(buddy.toUtf8().data());
	}
	if (d->divemaster != diveMaster.toUtf8().data()) {
		diveChanged = true;
		free(d->divemaster);
		d->divemaster = strdup(diveMaster.toUtf8().data());
	}
	if (d->notes != notes.toUtf8().data()) {
		diveChanged = true;
		free(d->notes);
		d->notes = strdup(notes.toUtf8().data());
	}
	if (diveChanged)
		mark_divelist_changed(true);
}

void QMLManager::saveChanges()
{
	if (!loadFromCloud()) {
		appendTextToLog("Don't save dives without loading from the cloud, first.");
		return;
	}
	appendTextToLog("Saving dives.");
	QString fileName;
	if (getCloudURL(fileName)) {
		appendTextToLog(get_error_string());
		return;
	}

	if (save_dives(fileName.toUtf8().data())) {
		appendTextToLog(get_error_string());
		return;
	}

	appendTextToLog("Dive saved.");
	set_filename(fileName.toUtf8().data(), true);
	mark_divelist_changed(false);
}

void QMLManager::addDive()
{
	appendTextToLog("Adding new dive.");
	DiveListModel::instance()->startAddDive();
}

void QMLManager::applyGpsData()
{
	locationProvider->applyLocations();
}

void QMLManager::sendGpsData()
{
	locationProvider->uploadToServer();
}

void QMLManager::clearGpsData()
{
	locationProvider->clearGpsData();
}

QString QMLManager::logText() const
{
	QString logText = m_logText + QString("\nNumer of GPS fixes: %1").arg(locationProvider->getGpsNum());
	return logText;
}

void QMLManager::setLogText(const QString &logText)
{
	m_logText = logText;
	emit logTextChanged();
}

void QMLManager::appendTextToLog(const QString &newText)
{
	m_logText += "\n" + newText;
	emit logTextChanged();
}

bool QMLManager::saveCloudPassword() const
{
	return m_saveCloudPassword;
}

void QMLManager::setSaveCloudPassword(bool saveCloudPassword)
{
	m_saveCloudPassword = saveCloudPassword;
}

bool QMLManager::locationServiceEnabled() const
{
	return m_locationServiceEnabled;
}

void QMLManager::setLocationServiceEnabled(bool locationServiceEnabled)
{
	m_locationServiceEnabled = locationServiceEnabled;
	locationProvider->serviceEnable(m_locationServiceEnabled);
}

QString QMLManager::cloudPassword() const
{
	return m_cloudPassword;
}

void QMLManager::setCloudPassword(const QString &cloudPassword)
{
	m_cloudPassword = cloudPassword;
	emit cloudPasswordChanged();
}

QString QMLManager::cloudUserName() const
{
	return m_cloudUserName;
}

void QMLManager::setCloudUserName(const QString &cloudUserName)
{
	m_cloudUserName = cloudUserName;
	emit cloudUserNameChanged();
}

int QMLManager::distanceThreshold() const
{
	return m_distanceThreshold;
}

void QMLManager::setDistanceThreshold(int distance)
{
	m_distanceThreshold = distance;
	emit distanceThresholdChanged();
}

int QMLManager::timeThreshold() const
{
	return m_timeThreshold;
}

void QMLManager::setTimeThreshold(int time)
{
	m_timeThreshold = time;
	emit timeThresholdChanged();
}

bool QMLManager::loadFromCloud() const
{
	return m_loadFromCloud;
}

void QMLManager::setLoadFromCloud(bool done)
{
	m_loadFromCloud = done;
	emit loadFromCloudChanged();
}