/*
  This program 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
  2 of the License, or (at your option) any later version.
*/

#include <QLabel>
#include <QTreeView>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QPushButton>
#include <QComboBox>
#include <QLineEdit>
#include <QSpinBox>
#include <QSettings>
#include <QFileDialog>
#include <QFileInfo>
#include <QLocale>
#include <QCompleter>
#include <QCheckBox>
#include <QMessageBox>
#include <QFile>

#include "newmoviewizard.h"
#include "smtreeitem.h"
#include "seriestreemodel.h"
#include "filestreemodel.h"
#include "smglobals.h"
#include "mappingtablewidget.h"
#include "mappingtablemodel.h"
#include "filestreemodel.h"
#include "helper.h"

NewMovieWizard::NewMovieWizard(QWidget *parent) : QWizard(parent){
	addPage(new MovieInfoPage);
	addPage(new MovieMappingPage("actors"));
	addPage(new MovieMappingPage("genres"));
	setOption(QWizard::IndependentPages, true);
}

void NewMovieWizard::accept(){
	//conjure up models
	SeriesTreeModel *seriesModel = static_cast<SeriesTreeModel*>(SmGlobals::instance()->model("SeriesModel"));
	FilesTreeModel *filesModel = static_cast<FilesTreeModel*>(SmGlobals::instance()->model("FilesModel"));

	//handle series
	QString series = field("title").toString();
	series = series.toLower().trimmed();
	QModelIndex seriesIdx = seriesModel->find(series);
	if(!seriesIdx.isValid()){
		if(seriesModel->addSeries(series, QModelIndex())){
			seriesIdx = seriesModel->find(series);
		}else{
			QMessageBox::critical(this, tr("Error"), tr("Failed to create new series!"));
			return;
		}
	}

	//handle seriespart
	int seriesno = field("seriesNo").toInt();
	QModelIndex seriesPartIdx = seriesModel->find(seriesno, SeriesTreeModel::SeriesPart, seriesIdx);
	if(seriesPartIdx.isValid()){
		QString error = QString(tr("Already have part %1 of %2")).arg(seriesno).arg(series);
		QMessageBox::critical(this, tr("Error"), error);
		return;
	}
	if(!seriesModel->addSeriesPart(seriesno, seriesIdx)){
		QMessageBox::critical(this, tr("Error"), tr("Failed to create series part!"));
		return;
	}
	seriesPartIdx = seriesModel->find(seriesno, SeriesTreeModel::SeriesPart, seriesIdx);
	int seriesPartId = seriesPartIdx.data(SeriesTreeModel::SeriesPartIdRole).toInt();

	//handle files
	MovieInfoPage *movieInfoPage = static_cast<MovieInfoPage*>(page(0));
	WizardTreeModel *wizardModel = movieInfoPage->model();
	int quality = field("quality").toInt();
	int dvdNo = -1;
	bool onDvd = field("onDvd").toBool();
	if(onDvd){
		dvdNo = field("dvdNo").toInt();
	}
	//int partNo = field("partNo").toInt();
	QHash<QString, int> fileData = wizardModel->files();
	QHash<QString, int>::const_iterator it = fileData.constBegin();
	while(it != fileData.constEnd()){
		QString path = it.key();
		int type = it.value();
		int partNo = wizardModel->filesPart(path);
		if(filesModel->addFile(path, type, quality, partNo, seriesPartId, dvdNo)){
			QString md5sum = Helper::md5Sum(path);
			Helper::moveToArchive(path, md5sum);
		}
		++it;
	}
	if(onDvd){
		filesModel->addFile(tr("DVD"), FilesTreeModel::Movie, quality, -1, seriesPartId, dvdNo);
	}

	//handle actors
	MovieMappingPage *actorPage = static_cast<MovieMappingPage*>(page(1));
	MappingTableItemModel *actorItemModel = actorPage->model();
	QStringList actors = actorItemModel->stringList();
	MappingTableModel *actorModel = static_cast<MappingTableModel*>(SmGlobals::instance()->model("actors"));
	actorModel->setMappings(actors, seriesPartId);

	//handle genres
	MovieMappingPage *genrePage = static_cast<MovieMappingPage*>(page(2));
	MappingTableItemModel *genreItemModel = genrePage->model();
	QStringList genres = genreItemModel->stringList();
	MappingTableModel *genreModel = static_cast<MappingTableModel*>(SmGlobals::instance()->model("genres"));
	genreModel->setMappings(genres, seriesPartId);

	//done
	emit seriesAdded(series, seriesno);
	QDialog::accept();
}

MovieInfoPage::MovieInfoPage(QWidget *parent) : QWizardPage(parent){
	setTitle(tr("Collect files for movie"));
	setSubTitle(tr("Select files by clicking the \"Add files...\" button. After adding files select one by one and set the appropriate file type. The series no is the number the movie has in the series: 14 in case of e.g. rogue adventures 14. The part number only has to be set if the movie is split in several parts."));
	setPixmap(QWizard::LogoPixmap, QPixmap(":/shemov.png"));

	//files model setup
	QStringList modelHeaders = QStringList() << tr("File name") << tr("Size") << tr("File Type") << tr("Part") << tr("Full path");
	mFileModel = new WizardTreeModel(modelHeaders, this);
	initModel();

	//files view
	mFileView = new QTreeView;
	mFileView->setModel(mFileModel);
	connect(mFileView->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)), this, SLOT(fileSelectionChanged(QModelIndex,QModelIndex)));

	//add + remove files
	QHBoxLayout *fileButtonLayout = new QHBoxLayout;
	fileButtonLayout->addStretch();
	mAddFile = new QPushButton(tr("Add files..."));
	fileButtonLayout->addWidget(mAddFile);
	connect(mAddFile, SIGNAL(clicked()), this, SLOT(addFiles()));
	mRemoveFile = new QPushButton(tr("Remove file"));
	fileButtonLayout->addWidget(mRemoveFile);
	connect(mRemoveFile, SIGNAL(clicked()), this, SLOT(removeFile()));

	//movie name
	QHBoxLayout *movieTitleLayout = new QHBoxLayout;
	QLabel *l1 = new QLabel(tr("Movie &title"));
	mTitle = new QLineEdit;
	l1->setBuddy(mTitle);
	movieTitleLayout->addWidget(l1);
	movieTitleLayout->addWidget(mTitle);
	SeriesTreeModel *seriesModel = static_cast<SeriesTreeModel*>(SmGlobals::instance()->model("SeriesModel"));
	QCompleter *completer = new QCompleter(this);
	completer->setModel(seriesModel);
	mTitle->setCompleter(completer);

	//file type
	QHBoxLayout *numberLayout = new QHBoxLayout;
	QLabel *l2 = new QLabel(tr("File &type"));
	mFileType = new QComboBox;
	l2->setBuddy(mFileType);
	mFileType->addItems(mFileModel->types());
	numberLayout->addWidget(l2);
	numberLayout->addWidget(mFileType);
	numberLayout->addStretch();
	connect(mFileType, SIGNAL(currentIndexChanged(QString)), this, SLOT(typeChanged(QString)));

	//series, part + quality
	QLabel *l3 = new QLabel(tr("&Series no."));
	mSeriesNo = new QSpinBox;
	l3->setBuddy(mSeriesNo);
	mSeriesNo->setMinimum(1);
	numberLayout->addWidget(l3);
	numberLayout->addWidget(mSeriesNo);
	QLabel *l4 = new QLabel(tr("&Part no."));
	mPartno = new QSpinBox;
	l4->setBuddy(mPartno);
	mPartno->setMinimum(-1);
	connect(mPartno, SIGNAL(valueChanged(int)), this, SLOT(seriesPartChanged(int)));
	numberLayout->addWidget(l4);
	numberLayout->addWidget(mPartno);
	QLabel *l5 = new QLabel(tr("&Quality"));
	mQuality = new QSpinBox;
	l5->setBuddy(mQuality);
	mQuality->setMinimum(1);
	mQuality->setMaximum(10);
	numberLayout->addWidget(l5);
	numberLayout->addWidget(mQuality);

	//dvd
	QHBoxLayout *dvdLayout = new QHBoxLayout;
	mOnDvd = new QCheckBox(tr("Movie is on DVD"));
	dvdLayout->addWidget(mOnDvd);
	dvdLayout->addStretch();
	QLabel *l6 = new QLabel(tr("Dvd no."));
	dvdLayout->addWidget(l6);
	mDvdNo = new QSpinBox;
	mDvdNo->setMinimum(1);
	dvdLayout->addWidget(mDvdNo);
	connect(mOnDvd, SIGNAL(stateChanged(int)), this, SLOT(onDvd(int)));
	mNextDvdNo = new QPushButton(tr("Get next"));
	dvdLayout->addWidget(mNextDvdNo);
	connect(mNextDvdNo, SIGNAL(clicked()), this, SLOT(setNextDvdNo()));
	setNextDvdNo();
	mNextDvdNo->setChecked(false);
	mDvdNo->setEnabled(false);
	mNextDvdNo->setEnabled(false);

	QVBoxLayout *mainLayout = new QVBoxLayout;
	mainLayout->addWidget(mFileView);
	mainLayout->addLayout(fileButtonLayout);
	mainLayout->addLayout(movieTitleLayout);
	mainLayout->addLayout(numberLayout);
	mainLayout->addLayout(dvdLayout);
	setLayout(mainLayout);

	//expose data
	registerField("title*", mTitle);
	registerField("seriesNo", mSeriesNo);
	registerField("partNo", mPartno);
	registerField("quality", mQuality);
	registerField("dvdNo", mDvdNo);
	registerField("onDvd", mOnDvd);
}

void MovieInfoPage::initializePage(){
	initModel();
	mTitle->clear();
	mSeriesNo->setValue(1);
	mPartno->setValue(1);
	mQuality->setValue(8);
	mOnDvd->setChecked(false);
}

void MovieInfoPage::addFiles(){
	QSettings s;
	QString startDir = s.value("paths/selecteddir", QDir::homePath()).toString();
	QStringList files = QFileDialog::getOpenFileNames(this, tr("Select files"), startDir);
	if(files.isEmpty()){
		return;
	}
	foreach(QString f, files){
		QFileInfo fi(f);
		if(fi.exists()){
			QList<QVariant> itemData;
			QModelIndex parent = QModelIndex();
			itemData << fi.fileName() << fi.size() << QVariant() << QVariant() << fi.absoluteFilePath();
			QString mimeType = Helper::mimeType(fi.absoluteFilePath());
			if(mimeType.startsWith("video")){
				itemData[WizardTreeModel::FileType] = WizardTreeModel::Movie;
				parent = mFileModel->find("Movie files");
			}else{
				itemData[WizardTreeModel::FileType] = WizardTreeModel::GeneralCover;
				parent = mFileModel->find("Cover files");
			}
			if(parent.isValid()){
				mFileModel->addRow(itemData, parent);
			}
		}
	}
	mFileView->expandAll();
	mFileView->resizeColumnToContents(0);
	mFileView->resizeColumnToContents(1);
	mFileView->resizeColumnToContents(2);

}

void MovieInfoPage::removeFile(){
	QModelIndexList selected = mFileView->selectionModel()->selectedRows();
	if(selected.isEmpty()){
		return;
	}
	mFileModel->removeRows(selected.at(0).row(), 1, selected.at(0).parent());
}

void MovieInfoPage::onDvd(int state){
	mDvdNo->setEnabled(state == Qt::Checked);
	mNextDvdNo->setEnabled(state == Qt::Checked);
}

void MovieInfoPage::typeChanged(QString type){
	QModelIndexList selected = mFileView->selectionModel()->selectedRows();
	if(selected.isEmpty()){
		return;
	}
	int newTypeId = mFileModel->typeId(type);
	if(newTypeId == -1){
		return;
	}
	QModelIndex item = selected.at(0);
	QModelIndex typeIndex = mFileModel->index(item.row(), WizardTreeModel::FileType, item.parent());
	QModelIndex oldParent = typeIndex.parent();
	mFileModel->setData(typeIndex, newTypeId, Qt::EditRole);
	QModelIndex newParent;
	if(newTypeId == WizardTreeModel::Movie){
		newParent = mFileModel->find("Movie files");
	}else{
		newParent = mFileModel->find("Cover files");
	}
	if(oldParent != newParent){
		mFileModel->reparent(item, newParent);
	}
}

void MovieInfoPage::seriesPartChanged(int partNo){
	QModelIndexList selected = mFileView->selectionModel()->selectedRows();
	if(selected.isEmpty()){
		return;
	}
	QModelIndex item = selected.at(0);
	if(item.data(WizardTreeModel::FileTypeRole).toInt() == WizardTreeModel::Movie){
		QModelIndex seriesPartIdx = mFileModel->index(item.row(), WizardTreeModel::FilePart, item.parent());
		QVariant data = (partNo == 0) ? QVariant() : QVariant(partNo);
		mFileModel->setData(seriesPartIdx, data, Qt::EditRole);
	}
}

void MovieInfoPage::setNextDvdNo(){
	SeriesTreeModel *seriesTreeModel = static_cast<SeriesTreeModel*>(SmGlobals::instance()->model("SeriesModel"));
	int nextdvd = seriesTreeModel->findNextDvdNo();
	mDvdNo->setValue(nextdvd + 1);
}

void MovieInfoPage::initModel(){
	SmTreeItem *root = new SmTreeItem(5);
	mMoviesItem= new SmTreeItem(QList<QVariant>() << tr("Movie files") << QVariant() << QVariant() << QVariant() << QVariant(), root);
	root->appendChild(mMoviesItem);
	mCoversItem = new SmTreeItem(QList<QVariant>() << tr("Cover files") << QVariant() << QVariant() << QVariant() << QVariant(), root);
	root->appendChild(mCoversItem);
	mFileModel->setRoot(root);
}

void MovieInfoPage::fileSelectionChanged(const QModelIndex &current, const QModelIndex &previous){
	Q_UNUSED(previous);
	int type = current.data(WizardTreeModel::FileTypeRole).toInt();
	if(type == WizardTreeModel::Movie){
		int part = 1;
		QVariant filePart= current.data(WizardTreeModel::FilePartRole);
		if(filePart.isValid()){
			part = filePart.toInt();
		}
		mPartno->blockSignals(true);
		mPartno->setValue(part);
		mPartno->blockSignals(false);
	}
	QString typeString = mFileModel->typeName(type);
	int comboIdx = mFileType->findText(typeString);
	if(comboIdx != -1){
		mFileType->blockSignals(true);
		mFileType->setCurrentIndex(comboIdx);
		mFileType->blockSignals(false);
	}
}

MovieMappingPage::MovieMappingPage(const QString &table, QWidget *parent) : QWizardPage(parent){
	QString title = QString(tr("Edit %1")).arg(table);
	QString subTitle = QString(tr("Edit %1 by adding them from the text field below")).arg(table);
	setTitle(title);
	setSubTitle(subTitle);

	mWidget = new MappingTableWidget(table);
	QHBoxLayout *mainLayout = new QHBoxLayout;
	mainLayout->addWidget(mWidget);

	setLayout(mainLayout);
}

void MovieMappingPage::initializePage(){
	model()->setStringList(QStringList());
}

WizardTreeModel::WizardTreeModel(QStringList &headers, QObject *parent) : SmTreeModel(headers, parent){
	FilesTreeModel *filesModel = static_cast<FilesTreeModel*>(SmGlobals::instance()->model("FilesModel"));
	mFileTypeMap = filesModel->fileTypes();
}

Qt::ItemFlags WizardTreeModel::flags(const QModelIndex &index) const{
	if(!index.parent().isValid()){
		return Qt::ItemIsEnabled;
	}
	return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
}

QHash<QString, int> WizardTreeModel::files() {
	QHash<QString, int> retval;
	mFilePartMap.clear();
	SmTreeItem *rootItem = root();
	for(int i = 0; i < rootItem->childCount(); ++i){
		SmTreeItem *firstChild = rootItem->child(i);
		for(int j = 0; j < firstChild->childCount(); ++j){
			SmTreeItem *secondChild = firstChild->child(j);
			retval.insert(secondChild->data(WizardTreeModel::FullPath).toString(), secondChild->data(WizardTreeModel::FileType).toInt());
			if(secondChild->data(WizardTreeModel::FilePart).isValid()){
				mFilePartMap.insert(secondChild->data(WizardTreeModel::FullPath).toString(), secondChild->data(WizardTreeModel::FilePart).toInt());
			}
		}
	}
	return retval;
}

int WizardTreeModel::filesPart(const QString &fullPath) const{
	if(mFilePartMap.contains(fullPath)){
		return mFilePartMap.value(fullPath);
	}
	return -1;
}

QVariant WizardTreeModel::data(const QModelIndex &index, int role) const{
	SmTreeItem *item = static_cast<SmTreeItem*>(index.internalPointer());
	if(role == Qt::DisplayRole){
		if(index.column() == FileSize){
			if(item->parent() == root()){
				return QVariant();
			}
			QLocale l;
			return l.toString(item->data(FileSize).toLongLong());
		}
		if(index.column() == FileType){
			return mFileTypeMap.value(item->data(FileType).toInt());
		}
		return item->data(index.column());
	}
	if(role == Qt::TextAlignmentRole){
		if(index.column() == FileSize){
			return Qt::AlignRight;
		}
		return Qt::AlignLeft;
	}
	if(role == FileNameRole){
		return item->data(FileName);
	}
	if(role == FileSizeRole){
		if(item->parent() == root()){
			return QVariant();
		}
		return item->data(FileSize);
	}
	if(role == FileTypeRole){
		return item->data(FileType);
	}
	if(role == FullPathRole){
		return item->data(FullPath);
	}
	if(role == FilePartRole){
		return item->data(FilePart);
	}
	return QVariant();
}

QStringList WizardTreeModel::types() const {
	return mFileTypeMap.values();
}

int WizardTreeModel::typeId(const QString &value) const{
	QHash<int, QString>::const_iterator it = mFileTypeMap.constBegin();
	while(it != mFileTypeMap.constEnd()){
		if(it.value() == value){
			return it.key();
		}
		++it;
	}
	return -1;
}

QString WizardTreeModel::typeName(int typeId) const{
	return mFileTypeMap.value(typeId);
}