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/***************************************************************************
 *   Copyright (C) 2009 by Ben Cooksley <ben@eclipse.endoftheinternet.org> *
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 *   This program 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 for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA          *
 ***************************************************************************/

#include "ActionEditor.h"

#include <KMessageBox>

#include <Solid/Predicate>

ActionEditor::ActionEditor(QWidget *parent) : QDialog(parent)
{
    topItem = new PredicateItem( Solid::Predicate(), nullptr );
    rootItem = nullptr;
    rootModel = new PredicateModel( topItem, this );
    // Prepare the dialog
    resize( QSize(600, 600) ); // Set a decent initial size
    // setModal( true );
    // Set up the interface
    ui.setupUi(this);
    ui.TvPredicateTree->setHeaderHidden( true );
    ui.TvPredicateTree->setModel( rootModel );
    ui.IbActionIcon->setIconSize( KIconLoader::SizeLarge );

    ui.CbDeviceType->addItems( actionData()->interfaceList() );

    // Connect up with everything needed -> slot names explain
    connect(ui.TvPredicateTree, &QTreeView::activated, this, &ActionEditor::updateParameter);
    connect(ui.PbParameterSave, &QPushButton::clicked, this, &ActionEditor::saveParameter);
    connect(ui.PbParameterReset, &QPushButton::clicked, this, &ActionEditor::updateParameter);
    connect(ui.CbDeviceType, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &ActionEditor::updatePropertyList);
    connect(ui.CbParameterType, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &ActionEditor::manageControlStatus);

    connect(ui.buttonBox, &QDialogButtonBox::accepted, this, &ActionEditor::accept);
    connect(ui.buttonBox, &QDialogButtonBox::rejected, this, &ActionEditor::reject);

    if (ui.TvPredicateTree->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick)) {
        connect(ui.TvPredicateTree, &QTreeView::clicked, this, &ActionEditor::updateParameter);
    }
}

ActionEditor::~ActionEditor()
{
    delete topItem;
}

void ActionEditor::setActionToEdit( ActionItem * item )
{
    activeItem = item;

    // Set all the text appropriately
    ui.IbActionIcon->setIcon( item->icon() );
    ui.LeActionFriendlyName->setText( item->name() );
    ui.LeActionCommand->setText(item->exec());

    setPredicate( item->predicate() );
    setWindowTitle(i18n("Editing Action '%1'", item->name()) ); // Set a friendly i18n caption
}

void ActionEditor::setPredicate( Solid::Predicate predicate )
{
    delete topItem;
    topItem = new PredicateItem( Solid::Predicate(), nullptr );
    rootItem = new PredicateItem( predicate, topItem );
    rootModel->setRootPredicate( rootItem->parent() );

    // Select the top item, not the hidden root
    QModelIndex topItem = rootModel->index( 0, 0, QModelIndex() );
    ui.TvPredicateTree->setCurrentIndex( topItem );
    ui.TvPredicateTree->expandToDepth( 2 );
    updateParameter();
}

void ActionEditor::updateParameter()
{
    QModelIndex current = ui.TvPredicateTree->currentIndex();
    PredicateItem * currentItem = static_cast<PredicateItem*>( current.internalPointer() );

    ui.CbParameterType->setCurrentIndex( currentItem->itemType );
    updatePropertyList();
    ui.CbDeviceType->setCurrentIndex( actionData()->interfacePosition( currentItem->ifaceType ) );
    int valuePos = actionData()->propertyPosition( currentItem->ifaceType, currentItem->property );
    ui.CbValueName->setCurrentIndex( valuePos );
    ui.LeValueMatch->setText( currentItem->value.toString() );
    ui.CbValueMatch->setCurrentIndex( currentItem->compOperator );
}

void ActionEditor::saveParameter()
{
    QModelIndex current = ui.TvPredicateTree->currentIndex();
    PredicateItem * currentItem = static_cast<PredicateItem*>( current.internalPointer() );

    // Hold onto this so we can determine if the number of children has changed...
    Solid::Predicate::Type oldType = currentItem->itemType;

    currentItem->setTypeByInt( ui.CbParameterType->currentIndex() );
    currentItem->ifaceType = actionData()->interfaceFromName( ui.CbDeviceType->currentText() );
    currentItem->property = actionData()->propertyInternal( currentItem->ifaceType, ui.CbValueName->currentText() );
    currentItem->value = QVariant( ui.LeValueMatch->text() );
    currentItem->setComparisonByInt( ui.CbValueMatch->currentIndex() );

    rootModel->itemUpdated( current );
    rootModel->childrenChanging( current, oldType );
}

QString ActionEditor::predicateString()
{
    return rootItem->predicate().toString();
}

void ActionEditor::updatePropertyList()
{
    Solid::DeviceInterface::Type currentType;
    currentType = actionData()->interfaceFromName( ui.CbDeviceType->currentText() );

    ui.CbValueName->clear();
    ui.CbValueName->addItems( actionData()->propertyList( currentType ) );
}

void ActionEditor::manageControlStatus()
{
    bool atomEnable = false;
    bool isEnable = false;

    switch( ui.CbParameterType->currentIndex() ) {
        case Solid::Predicate::PropertyCheck:
            atomEnable = true;
        case Solid::Predicate::InterfaceCheck:
            isEnable = true;
            break;
        default:
            break;
    }
    ui.CbDeviceType->setEnabled( isEnable );
    ui.CbValueName->setEnabled( atomEnable );
    ui.CbValueMatch->setEnabled( atomEnable );
    ui.LeValueMatch->setEnabled( atomEnable );
}

SolidActionData * ActionEditor::actionData()
{
    return SolidActionData::instance();
}

void ActionEditor::accept()
{
    // Save any open parameter changes first...
    saveParameter();

    // Read the data and prepare to save
    QString iconName = ui.IbActionIcon->icon();
    QString actionName = ui.LeActionFriendlyName->text();
    QString command = ui.LeActionCommand->text();
    QString predicate = predicateString();

    // We need to ensure that they are all valid before applying
    if (iconName.isEmpty() || actionName.isEmpty() || command.isEmpty() || !Solid::Predicate::fromString(predicate).isValid()) {
        KMessageBox::error(this, i18n("It appears that the action name, command, icon or condition are not valid.\nTherefore, changes will not be applied."), i18n("Invalid action"));
        return;
    }
    // apply the changes
    if (iconName != activeItem->icon()) {  // Has the icon changed?
        activeItem->setIcon( ui.IbActionIcon->icon() ); // Write the change
    }
    if (actionName != activeItem->name()) {  // Has the friendly name changed?
        activeItem->setName( ui.LeActionFriendlyName->text() ); // Write the change
    }
    if (command != activeItem->exec()) {  // Has the command changed?
        activeItem->setExec( ui.LeActionCommand->text() ); // Write the change
    }
    if (predicate != activeItem->predicate().toString() ) {  // Has it changed?
        activeItem->setPredicate( predicate ); // Write the change
    }

    QDialog::accept();
}