/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2016 Statoil ASA
// 
//  ResInsight 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 3 of the License, or
//  (at your option) any later version.
// 
//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
//  FITNESS FOR A PARTICULAR PURPOSE.
// 
//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html> 
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////

#include "RiuExportMultipleSnapshotsWidget.h"

#include "RiaApplication.h"

#include "ExportCommands/RicExportMultipleSnapshotsFeature.h"

#include "RimCase.h"
#include "RimEclipseCellColors.h"
#include "RimEclipseView.h"
#include "RimMultiSnapshotDefinition.h"
#include "RimProject.h"
#include "RimView.h"

#include "cafCmdFeatureManager.h"
#include "cafPdmUiTableView.h"
#include "cafSelectionManager.h"

#include <QFileDialog>
#include <QAbstractItemView>
#include <QBoxLayout>
#include <QDialogButtonBox>
#include <QLabel>
#include <QLineEdit>
#include <QMenu>
#include <QPushButton>
#include <QTableView>
#include <QToolButton>
#include <QWidget>
#include <QHeaderView>


//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
RiuExportMultipleSnapshotsWidget::RiuExportMultipleSnapshotsWidget(QWidget* parent, RimProject* project)
    : QDialog(parent, Qt::WindowTitleHint | Qt::WindowSystemMenuHint),
    m_rimProject(project)
{
    setWindowTitle("Export Multiple Snapshots");

    int nWidth = 1000;
    int nHeight = 300;
    resize(nWidth, nHeight);

    QVBoxLayout* dialogLayout = new QVBoxLayout;
    setLayout(dialogLayout);

    m_pdmTableView = new caf::PdmUiTableView(this);
    m_pdmTableView->tableView()->setSelectionMode(QAbstractItemView::ExtendedSelection);
    m_pdmTableView->tableView()->setContextMenuPolicy(Qt::CustomContextMenu);
    m_pdmTableView->enableHeaderText(false);

    connect(m_pdmTableView->tableView(), SIGNAL(customContextMenuRequested(QPoint)), SLOT(customMenuRequested(QPoint)));

    m_pdmTableView->setListField(&(project->multiSnapshotDefinitions()));

    QHeaderView* verticalHeader = m_pdmTableView->tableView()->verticalHeader();
    verticalHeader->setResizeMode(QHeaderView::Interactive);

    m_pdmTableView->tableView()->resizeColumnsToContents();

    // Set active child array to be able to use generic delete
    caf::SelectionManager::instance()->setActiveChildArrayFieldHandle(&(project->multiSnapshotDefinitions()));

    dialogLayout->addWidget(m_pdmTableView);

    // Export folder
    {
        QHBoxLayout* layout = new QHBoxLayout;

        layout->addWidget(new QLabel("Export folder"));

        // Save images in snapshot catalog relative to project directory
        QString snapshotFolderName = RiaApplication::instance()->createAbsolutePathFromProjectRelativePath("snapshots");

        m_exportFolderLineEdit = new QLineEdit(snapshotFolderName);

        QToolButton* button = new QToolButton;
        button->setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred));
        button->setText(QLatin1String("..."));

        layout->addWidget(m_exportFolderLineEdit);
        layout->addWidget(button);

        connect(button, SIGNAL(clicked()), this, SLOT(folderSelectionClicked()));

        dialogLayout->addLayout(layout);
    }


    // Buttons
    QDialogButtonBox* buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

    QPushButton* exportButton = new QPushButton(tr("Export"));
    exportButton->setDefault(true);
    buttonBox->addButton(exportButton, QDialogButtonBox::ActionRole);
    connect(exportButton, SIGNAL(clicked()), this, SLOT(exportSnapshots()));

    dialogLayout->addWidget(buttonBox);
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
RiuExportMultipleSnapshotsWidget::~RiuExportMultipleSnapshotsWidget()
{
    m_pdmTableView->setListField(nullptr);

    caf::SelectionManager::instance()->setActiveChildArrayFieldHandle(nullptr);
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void RiuExportMultipleSnapshotsWidget::addSnapshotItemFromActiveView()
{
    if (!m_rimProject) return;

    RimView* activeView = RiaApplication::instance()->activeReservoirView();
    if (activeView)
    {
        RimMultiSnapshotDefinition* multiSnapshot = new RimMultiSnapshotDefinition();
        multiSnapshot->view = activeView;

        RimEclipseView* eclipseView = dynamic_cast<RimEclipseView*>(activeView);
        if (eclipseView)
        {
            multiSnapshot->eclipseResultType = eclipseView->cellResult->resultType();
            multiSnapshot->selectedEclipseResults.v().push_back(eclipseView->cellResult->resultVariable());

        }
        multiSnapshot->timeStepStart = activeView->currentTimeStep();
        multiSnapshot->timeStepEnd = activeView->currentTimeStep();

        RimCase* sourceCase = nullptr;
        activeView->firstAncestorOrThisOfType(sourceCase);
        if (sourceCase)
        {
            multiSnapshot->additionalCases().push_back(sourceCase);
        }

        m_rimProject->multiSnapshotDefinitions.push_back(multiSnapshot);
        m_rimProject->multiSnapshotDefinitions.uiCapability()->updateConnectedEditors();
    }
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void RiuExportMultipleSnapshotsWidget::addEmptySnapshotItems(size_t itemCount)
{
    if (!m_rimProject) return;

    for (size_t i = 0; i < itemCount; i++)
    {
        RimMultiSnapshotDefinition* multiSnapshot = new RimMultiSnapshotDefinition();
        multiSnapshot->isActive = false;

        m_rimProject->multiSnapshotDefinitions.push_back(multiSnapshot);
    }

    m_rimProject->multiSnapshotDefinitions.uiCapability()->updateConnectedEditors();
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void RiuExportMultipleSnapshotsWidget::customMenuRequested(QPoint pos)
{
    caf::CmdFeatureManager* commandManager = caf::CmdFeatureManager::instance();

    QMenu menu;
    menu.addAction(commandManager->action("PdmListField_DeleteItem","Delete row"));

    QAction* newRowAction = new QAction("New row", this);
    connect(newRowAction, SIGNAL(triggered()), SLOT(addSnapshotItem()));
    menu.addAction(newRowAction);

    QAction* clearAllRows = new QAction("Clear", this);
    connect(clearAllRows, SIGNAL(triggered()), SLOT(deleteAllSnapshotItems())); 
    menu.addAction(clearAllRows);
    
    
    // Qt doc: QAbstractScrollArea and its subclasses that map the context menu event to coordinates of the viewport().
    QPoint globalPos = m_pdmTableView->tableView()->viewport()->mapToGlobal(pos);

    menu.exec(globalPos);
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void RiuExportMultipleSnapshotsWidget::deleteAllSnapshotItems()
{
    if (!m_rimProject) return;

    m_rimProject->multiSnapshotDefinitions.deleteAllChildObjects();

    m_rimProject->multiSnapshotDefinitions.uiCapability()->updateConnectedEditors();
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void RiuExportMultipleSnapshotsWidget::exportSnapshots()
{
    RicExportMultipleSnapshotsFeature::exportMultipleSnapshots(m_exportFolderLineEdit->text(), m_rimProject);
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void RiuExportMultipleSnapshotsWidget::folderSelectionClicked()
{
    QString defaultPath = m_exportFolderLineEdit->text();

    QString directoryPath = QFileDialog::getExistingDirectory(m_exportFolderLineEdit,
        tr("Get existing directory"),
        defaultPath,
        QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);

    if (!directoryPath.isEmpty())
    {
        m_exportFolderLineEdit->setText(directoryPath);
    }
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void RiuExportMultipleSnapshotsWidget::addSnapshotItem()
{
    addSnapshotItemFromActiveView();
}