#include "lrscripteditor.h"
#include "ui_lrscripteditor.h"

#ifdef USE_QJSENGINE
#include <QJSValueIterator>
#endif

#include "lrdatasourcemanager.h"
#include "lrscriptenginemanager.h"
#include "lrdatadesignintf.h"
#include "lrreportengine_p.h"

namespace LimeReport{

ScriptEditor::ScriptEditor(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::ScriptEditor), m_reportEngine(0), m_page(0)
{
    ui->setupUi(this);
    setFocusProxy(ui->textEdit);
    m_completer = new QCompleter(this);
    ui->textEdit->setCompleter(m_completer);
    connect(ui->splitter, SIGNAL(splitterMoved(int,int)), this, SIGNAL(splitterMoved(int,int)));
}

ScriptEditor::~ScriptEditor()
{
    delete ui;
}

void ScriptEditor::initEditor(DataSourceManager* dm)
{
    ScriptEngineManager& se = LimeReport::ScriptEngineManager::instance();
    se.setDataManager(dm);

    initCompleter();

    if (dm){
        if (dm->isNeedUpdateDatasourceModel())
           dm->updateDatasourceModel();
        ui->twData->setModel(dm->datasourcesModel());
        ui->twScriptEngine->setModel(se.model());
    }

    if (ui->twScriptEngine->selectionModel()){
        connect(ui->twScriptEngine->selectionModel(), SIGNAL(currentChanged(QModelIndex,QModelIndex)),
                this, SLOT(slotOnCurrentChanged(QModelIndex,QModelIndex)));
    }
}

void ScriptEditor::setReportEngine(ReportEnginePrivateInterface* reportEngine)
{
    m_reportEngine = reportEngine;
    DataSourceManager* dm = m_reportEngine->dataManager();
    initEditor(dm);
}

void ScriptEditor::setReportPage(PageDesignIntf* page)
{
    m_page = page;
    DataSourceManager* dm = page->datasourceManager();
    initEditor(dm);
}

void ScriptEditor::setPageBand(BandDesignIntf* band)
{
    if (band && ui->twData->model() && !band->datasourceName().isEmpty()){
        QModelIndexList nodes = ui->twData->model()->match(
                    ui->twData->model()->index(0,0),
                    Qt::DisplayRole,
                    band->datasourceName(),
                    2,
                    Qt::MatchRecursive
        );
        if (!nodes.isEmpty()){
            ui->twData->expand(nodes.at(0).parent());
            ui->twData->expand(nodes.at(0));
        }
    }
}

void ScriptEditor::initCompleter()
{
    QStringList dataWords;

    DataSourceManager* dm = 0;
    if (m_reportEngine)
        dm = m_reportEngine->dataManager();
    if (m_page)
        dm = m_page->datasourceManager();

    ScriptEngineManager& se = LimeReport::ScriptEngineManager::instance();

#ifdef USE_QJSENGINE
    QJSValue globalObject = se.scriptEngine()->globalObject();
    QJSValueIterator it(globalObject);
    while (it.hasNext()){
        it.next();
        if (it.value().isCallable() ){
            dataWords << it.name();
        }
    }
#endif
    foreach(const QString &dsName,dm->dataSourceNames()){
        dataWords << dsName;
        foreach(const QString &field, dm->fieldNames(dsName)){
            dataWords<<dsName+"."+field;
        }
    }

    foreach (QString varName, dm->variableNames()) {
        dataWords << varName.remove("#");
    }

    if (m_reportEngine){
        for ( int i = 0; i < m_reportEngine->pageCount(); ++i){
            PageDesignIntf* page = m_reportEngine->pageAt(i);
            dataWords << page->pageItem()->objectName();
            foreach (BaseDesignIntf* item, page->pageItem()->childBaseItems()){
                addItemToCompleater(page->pageItem()->objectName(), item, dataWords);
            }
        }
    }

    m_completer->setModel(new QStringListModel(dataWords,m_completer));    
}

QByteArray ScriptEditor::saveState()
{
    return ui->splitter->saveState();
}

void ScriptEditor::restoreState(QByteArray state)
{
    ui->splitter->restoreState(state);
}

void ScriptEditor::setPlainText(const QString& text)
{
    ui->textEdit->setPlainText(text);
}

void ScriptEditor::setEditorFont(QFont font)
{
    ui->textEdit->setFont(font);
}

QFont ScriptEditor::editorFont()
{
    return ui->textEdit->font();
}

QString ScriptEditor::toPlainText()
{
    return ui->textEdit->toPlainText();
}

void ScriptEditor::addItemToCompleater(const QString& pageName, BaseDesignIntf* item, QStringList& dataWords)
{
    BandDesignIntf* band = dynamic_cast<BandDesignIntf*>(item);
    if (band){
        dataWords << band->objectName();
        dataWords << pageName+"_"+band->objectName();
        dataWords << pageName+"_"+band->objectName()+".beforeRender";
        dataWords << pageName+"_"+item->objectName()+".afterData";
        dataWords << pageName+"_"+band->objectName()+".afterRender";
        foreach (BaseDesignIntf* child, band->childBaseItems()){
            addItemToCompleater(pageName, child, dataWords);
        }
    } else {
        dataWords << item->objectName();
        dataWords << pageName+"_"+item->objectName();
        dataWords << pageName+"_"+item->objectName()+".beforeRender";
        dataWords << pageName+"_"+item->objectName()+".afterData";
        dataWords << pageName+"_"+item->objectName()+".afterRender";
    }
}

void ScriptEditor::on_twData_doubleClicked(const QModelIndex &index)
{
    if (!index.isValid()) return;
    LimeReport::DataNode* node = static_cast<LimeReport::DataNode*>(index.internalPointer());
    if (node->type()==LimeReport::DataNode::Field){
        ui->textEdit->insertPlainText(QString("$D{%1.%2}").arg(node->parent()->name()).arg(node->name()));
    }
    if (node->type()==LimeReport::DataNode::Variable){
        ui->textEdit->insertPlainText(QString("$V{%1}").arg(node->name()));
    }
    ui->textEdit->setFocus();
}

void ScriptEditor::on_twScriptEngine_doubleClicked(const QModelIndex &index)
{
    if (!index.isValid()) return;
    LimeReport::ScriptEngineNode* node = static_cast<LimeReport::ScriptEngineNode*>(index.internalPointer());
    if (node->type()==LimeReport::ScriptEngineNode::Function){
        ui->textEdit->insertPlainText(node->name()+"()");
    }
    ui->textEdit->setFocus();
}

void ScriptEditor::slotOnCurrentChanged(const QModelIndex &to, const QModelIndex &)
{
    LimeReport::ScriptEngineNode* node = static_cast<LimeReport::ScriptEngineNode*>(to.internalPointer());
    if (node->type()==LimeReport::ScriptEngineNode::Function){
       ui->lblDescription->setText(node->description());
    }
}

} // namespace LimeReport