/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#include <QStandardItemModel>

#include <QXmlQuery>

#include <QFile>

#include <QXmlStreamReader>

#include <QDebug>

#include <QDir>

#include "HelpUtils.h"

#include "HelpCommon.h"

#include "HelpProxyModel.h"

#include "HelpStandardItem.h"

#include "HelpDataProvider.h"

HelpDataProvider::HelpDataProvider()

{

	mHelpModel = new QStandardItemModel();

	mKeywordModel = new QStandardItemModel();

	mSearhResultModel = new HelpProxyModel();

	mSearhResultModel->setSourceModel(mKeywordModel);

	mAppItem = NULL;

}

HelpDataProvider::~HelpDataProvider()

{

	delete mHelpModel;

	delete mSearhResultModel;

	delete mKeywordModel;

}

///////////////////////////////////////////////////////////////////////////////////////

HelpDataProvider* gHelpDataProviderInstance = NULL;

HelpDataProvider* HelpDataProvider::instance()

{

    if(!gHelpDataProviderInstance)

    {

        gHelpDataProviderInstance = new HelpDataProvider();

    }

    return gHelpDataProviderInstance;

}

void HelpDataProvider::destroyInstance()

{

    delete gHelpDataProviderInstance;

    gHelpDataProviderInstance = NULL;

}

///////////////////////////////////////////////////////////////////////////////////////

QAbstractItemModel* HelpDataProvider::getCategoryData()

{

    return mHelpModel;

}

QAbstractItemModel* HelpDataProvider::getSearchData(const QString& key)

{

	if(key == mLastSrhKey)

	{

		return mSearhResultModel;

	}

	mLastSrhKey = key;

    mSearhResultModel->setFilterRegExp(key);

    return mSearhResultModel;

}

void HelpDataProvider::setHelpContentUrl(const QString& uid, const QString& href)

{

    QUrl url = QUrl::fromLocalFile(uid+BACKSLASH+href);

    mHelpContentRoot = url.toString();

}

void HelpDataProvider::getHelpContentData(QString& content, QString& url)

{

    // url

    if(url.isEmpty())

    {

        url = mHelpContentRoot;

    }

    url.remove(URL_HEADER_LOCAL);

    // uid

    QString uid = url.section(BACKSLASH, 0, -3);

    uid.append(BACKSLASH + url.section(BACKSLASH, -2,-2));

    // href

    QString href = url.section(BACKSLASH, -1,-1);

    int anchorPos = href.indexOf(HASHMARK);

    if(anchorPos != -1)

    {

        href = href.section(HASHMARK, 0, 0);

    }

    QString path(uid);

    path.append(BACKSLASH);

    path.append(CONTENTSZIP);

    HelpUtils::loadHtmlFromZipFile(path , href, content);

}

///////////////////////////////////////////////////////////////////////////////////////

void HelpDataProvider::createHelpCategory()

{

	constructCategory();

	mHelpModel->setSortRole(Qt::DisplayRole);

	constructCategory2((HelpStandardItem*)mHelpModel->invisibleRootItem());

	if(mAppItem)

	{

		mHelpModel->appendRow(mAppItem);

		mAppItem->sortChildren(0, HelpUtils::sortOrder());

		constructCategory2(mAppItem);

	}	

	mKeywordModel->sort(0, HelpUtils::sortOrder());

}

void HelpDataProvider::constructCategory()

{

	QFileInfoList driveList = QDir::drives();

	QDir dir;

	QString lang = HelpUtils::UILocaleFromQtToSymbian();

	QString path(HelpUtils::rootPath());

	path.append(XHTMLPATH);

	path.append(lang);

	QStringList uidList;

	QStringList titleList;

	parseCategoryIndexXml(path, uidList, titleList);

	//scan other root path and construct 3rd party help

	foreach(QFileInfo fi, driveList)

	{

		path.clear();

		path.append(fi.absolutePath());

		path.append(XHTMLPATH);

		path.append(lang);

		dir.setPath(path);

		if(dir.exists())

		{

			if(QString::compare(fi.absolutePath(), HelpUtils::rootPath(), Qt::CaseInsensitive) == 0)

			{

				continue;

			}

			constructAppCategory(path, uidList);

		}

	}

	constructBuiltInCategory(path, uidList, titleList);

	mHelpModel->setSortRole(PriorityRole);

	mHelpModel->sort(0, HelpUtils::sortOrder());

}

void HelpDataProvider::constructBuiltInCategory(const QString& path, const QStringList& uidList, const QStringList& titleList)

{

	if(uidList.count() != titleList.count())

	{

		//ToDo

		return;

	}

	for(int i = 0; i < uidList.count(); i++)

	{

		if(mUpdateUidList.contains(uidList[i]))

		{

			continue;

		}

		QString uid(path);

		uid.append(BACKSLASH);

		uid.append(uidList[i]);

		constructBuiltInCategoryItem(uid, titleList[i]);

	}

}

void HelpDataProvider::constructAppCategory(const QString& path, QStringList& uidList)

{

	QDir dir(path);	

	if(!dir.exists())

	{

		return;

	}

	QStringList uidDirList = dir.entryList();

	QString pathUid;

	foreach(QString uid, uidDirList)

	{

		pathUid.clear();

		pathUid.append(path);

		pathUid.append(BACKSLASH);

		pathUid.append(uid);

		QString titleStr;

		parseAppMetaxml(pathUid, titleStr);

		if(titleStr.isEmpty())

		{

			continue;

		}

		if(uidList.contains(uid) || mUpdateUidList.contains(uid))

		{

			mUpdateUidList.append(uid);

			constructBuiltInCategoryItem(pathUid, titleStr);

			continue;

		}

		HelpStandardItem* item = NULL;

		item = new HelpStandardItem(titleStr);

		if(!item)

		{

			//no memory

			return;

		}

		item->setData(pathUid, UidRole);

		if(!mAppItem)

		{

			mAppItem = new HelpStandardItem(qtTrId(TXT_APPLICATIONS));

			if(!mAppItem)

			{

				//no memory

				return;

			}

			mAppItem->setData(APPPRIORITY, PriorityRole);

		}

		mAppItem->appendRow(item);

	}

}

void HelpDataProvider::constructBuiltInCategoryItem(const QString& uid, const QString& title)

{

	int priority;

	parseBuiltInMetaxml(uid, priority);

	HelpStandardItem* item = NULL;

	item = new HelpStandardItem(title);

	if(!item)

	{

		//no memory

		return;

	}

	item->setData(uid, UidRole);

	item->setData(priority, PriorityRole);

	mHelpModel->appendRow(item);

}

void HelpDataProvider::constructCategory2(HelpStandardItem* itemParent)

{

	int count = itemParent->rowCount();

	for(int i =0; i < count; i++)

	{

		HelpStandardItem* item = (HelpStandardItem*)itemParent->child(i);

		constructCategory2Item(item);

	}

}

void HelpDataProvider::constructCategory2Item(HelpStandardItem* itemParent)

{

	QStringList hrefList;

	QStringList titleList;

	QString uid = itemParent->data(UidRole).toString();

	parseCategory2IndexXml(uid, hrefList, titleList);

	if(hrefList.count() == 0 || hrefList.count() != titleList.count())

	{

		return;

	}

	for(int i = 0; i < hrefList.count(); i++)

	{

		HelpStandardItem* item = NULL;

		item = new HelpStandardItem(titleList[i]);

		if(!item)

		{

			//no memory

			return;

		}

		item->setData(hrefList[i], HrefRole);

		item->setData(uid, UidRole);

		itemParent->appendRow(item);

		constructKeywordModel(titleList[i], uid, hrefList[i]);

	}

	itemParent->sortChildren(0, HelpUtils::sortOrder());

}

void HelpDataProvider::constructKeywordModel(const QString& title, const QString& uid, const QString& href)

{

	HelpStandardItem* item = NULL;

	item = new HelpStandardItem(title);

	if(!item)

	{

		//no memory

		return;

	}

	item->setData(uid, UidRole);

	item->setData(href, HrefRole);

	mKeywordModel->appendRow(item);

}

void HelpDataProvider::parseCategoryIndexXml(const QString& path, QStringList& uidList, QStringList& titleList)

{

	QString pathIndex(path);

	pathIndex.append(BACKSLASH);

	pathIndex.append(INDEXXML);

	QFile file(pathIndex);

	if (!file.open(QIODevice::ReadOnly)) {

		return;

	}

	//parse index xml to a stringlist, each string include id and navtitle and seperate by "specilchar"

	QXmlQuery query;

	query.bindVariable("inputdoc", &file);

	query.setQuery("doc($inputdoc)/collections/collection/xs:string(@id)");

	if(!query.isValid())

	{

		return;

	}

	if(!query.evaluateTo(&uidList))

	{

		return;

	}

	query.setQuery("doc($inputdoc)/collections/collection/xs:string(@navtitle)");

	if(!query.isValid())

	{

		return;

	}

	if(!query.evaluateTo(&titleList))

	{

		return;

	}

	QStringList featureIdLst;

	query.setQuery("doc($inputdoc)/collections/collection/number(@FeatureId)");

	if(!query.isValid())

	{

		return;

	}

	if(!query.evaluateTo(&featureIdLst))

	{

		return;

	}

	if(featureIdLst.count() != uidList.count())

	{

		return;

	}

	for(int i = featureIdLst.count()  - 1; i >= 0; i--)

	{

		int featureID = featureIdLst.at(i).toInt();

		if(!HelpUtils::suppportFeatureID(featureID))

		{

			uidList.removeAt(i);

			titleList.removeAt(i);

		}

	}

}

void HelpDataProvider::parseCategory2IndexXml(const QString& path, QStringList& hrefList, QStringList& titleList)

{

	QString pathIndex(path);

	pathIndex.append(BACKSLASH);

	pathIndex.append(INDEXXML);

	QFile file(pathIndex);

	if (!file.open(QIODevice::ReadOnly)) {

		return;

	}

	//parse index xml to a stringlist, each string include href and navtitle and seperate by "specilchar"

	QXmlQuery query;

	query.bindVariable("inputdoc", &file);

	query.setQuery("doc($inputdoc)/topics/topicref/xs:string(@href)");	

	if(!query.isValid())

	{

		return;

	}

	if(!query.evaluateTo(&hrefList))

	{

		return;

	}	

	query.setQuery("doc($inputdoc)/topics/topicref/xs:string(@navtitle)");

	if(!query.isValid())

	{

		return;

	}

	if(!query.evaluateTo(&titleList))

	{

		return;

	}

	QStringList featureIdLst;

	query.setQuery("doc($inputdoc)/topics/topicref/number(@FeatureId)");

	if(!query.isValid())

	{

		return;

	}

	if(!query.evaluateTo(&featureIdLst))

	{

		return;

	}

	if(featureIdLst.count() != hrefList.count())

	{

		return;

	}

	for(int i = featureIdLst.count()  - 1; i >= 0; i--)

	{

		int featureID = featureIdLst.at(i).toInt();

		if(!HelpUtils::suppportFeatureID(featureID))

		{

			hrefList.removeAt(i);

			titleList.removeAt(i);

		}

	}

}

void HelpDataProvider::parseBuiltInMetaxml(const QString& path, int& priority)

{

	QString pathMetaxml(path);

	pathMetaxml.append(BACKSLASH);

	pathMetaxml.append(METAXML);

	priority = -1;

	QFile file(pathMetaxml);

	if (!file.open(QIODevice::ReadOnly))

	{

		return;

	}

	QXmlQuery query;

	QString str;

	query.bindVariable("inputdoc", &file);

	query.setQuery("doc($inputdoc)/meta/number(priority)");	

	if(query.isValid() && query.evaluateTo(&str))

	{

		priority = str.toInt();

	}

}

void HelpDataProvider::parseAppMetaxml(const QString& path, QString& title)

{

	QString pathMetaxml(path);

	pathMetaxml.append(BACKSLASH);

	pathMetaxml.append(METAXML);

	QFile file(pathMetaxml);

	if (!file.open(QIODevice::ReadOnly)) {

		return;

	}

	//parse meta xml, get the title string

	QXmlQuery query;

	query.bindVariable("inputdoc", &file);

	query.setQuery("doc($inputdoc)/meta/string(title)");

	if(!query.isValid())

	{

		return;

	}

	if(!query.evaluateTo(&title))

	{

		return;

	}

}