/*
 * sessionsiconholder.cpp
 *
 *  Created on: Mar 7, 2014
 *      Author: nils
 */

#include <QHash>
#include <QtDebug>
#include <QFile>
#include <QDir>
#include <QIcon>
#include <QResource>
#include <QFileInfo>

#include "globals.h"
#include "sessionsiconholder.h"
#include "sessiontreemodel.h"
#include "FileDownloader.h"

SessionsIconHolder::SessionsIconHolder(SessionTreeModel& sessionTreeModel):treeModel(sessionTreeModel) {
	QDir().mkpath(iconsTempPath);
}

void SessionsIconHolder::afterDownload(QString& url, QByteArray downloadedData) {
	// save the data to disk
	QString file_name = url.replace("http://", "");
	file_name = file_name.replace("/", "_");
	QString file_path = iconsTempPath + file_name;
	QFile file(file_path);
	if (!file.open(QFile::WriteOnly)) {
		if (debugMode) {
			qDebug() << "Could not write file: " << file_path;
		}
		return;
	}
	file.write(downloadedData);

	if (file.write(downloadedData) != downloadedData.length()) {
		if (debugMode) {
			qDebug() << "Could not write file: " << file_path;
		}
		return;
	}

	file.close();

	QIcon icon(file_path);
	icons.insert(url, icon);

	// trigger the SessionTreeModel to update the view
	treeModel.updateView();
}

QIcon SessionsIconHolder::getIcon(const QString& name) {
	// check if icon was loaded before
	if (icons.contains(name)) {
		return icons[name];
	}

	// else load icon from resource
	QIcon icon;
	if (QResource(":" + name.toLower() + ".svg").isValid()) {
		icon = QIcon(":" + name.toLower() + ".svg");
	} else if (QResource(":" + name.toLower()).isValid()) {
		icon =  QIcon(":" + name.toLower());
	} else {
		icon = QIcon();
	}

	// insert icon to hash table
	icons.insert(name, icon);
	return icon;
}

QIcon SessionsIconHolder::getIcon(const QUrl& url) {
	// check if icon was loaded before
	if (icons.contains(url.toString())) {
		return icons[url.toString()];
	}

	// search the icon in the tmp folder
	QString file_name = url.toString().replace("http://", "");
	file_name = file_name.replace("/", "_");
	QString file_path = iconsTempPath + file_name;

	if (QFile::exists(file_path)) {
		QIcon icon(file_path);
		icons.insert(url.toString(), icon);
		return icon;
	}

	// else load icon from url
	FileDownloader* fileDownloader = new FileDownloader(this);
	fileDownloader->connectSlot(this, SLOT(afterDownload(QString&, QByteArray)));
	fileDownloader->downloadFile(url);

	return QIcon();
}