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#include "window.h"

#include "environment.h"

#include "context2d.h"

#include "qcontext2dcanvas.h"

#include <QHBoxLayout>

#include <QListWidget>

#include <QDir>

#include <QMessageBox>

#ifndef QT_NO_SCRIPTTOOLS

#include <QAction>

#include <QApplication>

#include <QMainWindow>

#include <QPushButton>

#include <QVBoxLayout>

#include <QScriptEngineDebugger>

#endif

static QString scriptsDir()

{

    if (QFile::exists("./scripts"))

        return "./scripts";

    return ":/scripts";

}

//! [0]

Window::Window(QWidget *parent)

    : QWidget(parent)

#ifndef QT_NO_SCRIPTTOOLS

      , m_debugger(0), m_debugWindow(0)

#endif

{

    m_env = new Environment(this);

    QObject::connect(m_env, SIGNAL(scriptError(QScriptValue)),

                     this, SLOT(reportScriptError(QScriptValue)));

    Context2D *context = new Context2D(this);

    context->setSize(150, 150);

    m_canvas = new QContext2DCanvas(context, m_env, this);

    m_canvas->setFixedSize(context->size());

    m_canvas->setObjectName("tutorial");

    m_env->addCanvas(m_canvas);

//! [0]

#ifndef QT_NO_SCRIPTTOOLS

    QVBoxLayout *vbox = new QVBoxLayout();

    vbox->addWidget(m_canvas);

    m_debugButton = new QPushButton(tr("Run in Debugger"));

    connect(m_debugButton, SIGNAL(clicked()), this, SLOT(runInDebugger()));

    vbox->addWidget(m_debugButton);

#endif

    QHBoxLayout *hbox = new QHBoxLayout(this);

    m_view = new QListWidget(this);

    m_view->setEditTriggers(QAbstractItemView::NoEditTriggers);

    hbox->addWidget(m_view);

#ifndef QT_NO_SCRIPTTOOLS

    hbox->addLayout(vbox);

#else

    hbox->addWidget(m_canvas);

#endif

//! [1]

    QDir dir(scriptsDir());

    QFileInfoList entries = dir.entryInfoList(QStringList() << "*.js");

    for (int i = 0; i < entries.size(); ++i)

        m_view->addItem(entries.at(i).fileName());

    connect(m_view, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),

            this, SLOT(selectScript(QListWidgetItem*)));

//! [1]

    setWindowTitle(tr("Context 2D"));

}

//! [2]

void Window::selectScript(QListWidgetItem *item)

{

    QString fileName = item->text();

    runScript(fileName, /*debug=*/false);

}

//! [2]

void Window::reportScriptError(const QScriptValue &error)

{

    QMessageBox::warning(this, tr("Context 2D"), tr("Line %0: %1")

                         .arg(error.property("lineNumber").toInt32())

                         .arg(error.toString()));

}

#ifndef QT_NO_SCRIPTTOOLS

//! [3]

void Window::runInDebugger()

{

    QListWidgetItem *item = m_view->currentItem();

    if (item) {

        QString fileName = item->text();

        runScript(fileName, /*debug=*/true);

    }

}

//! [3]

#endif

//! [4]

void Window::runScript(const QString &fileName, bool debug)

{

    QFile file(scriptsDir() + "/" + fileName);

    file.open(QIODevice::ReadOnly);

    QString contents = file.readAll();

    file.close();

    m_env->reset();

#ifndef QT_NO_SCRIPTTOOLS

    if (debug) {

        if (!m_debugger) {

            m_debugger = new QScriptEngineDebugger(this);

            m_debugWindow = m_debugger->standardWindow();

            m_debugWindow->setWindowModality(Qt::ApplicationModal);

            m_debugWindow->resize(1280, 704);

        }

        m_debugger->attachTo(m_env->engine());

        m_debugger->action(QScriptEngineDebugger::InterruptAction)->trigger();

    } else {

        if (m_debugger)

            m_debugger->detach();

    }

#else

    Q_UNUSED(debug);

#endif

    QScriptValue ret = m_env->evaluate(contents, fileName);

#ifndef QT_NO_SCRIPTTOOLS

    if (m_debugWindow)

        m_debugWindow->hide();

#endif

    if (ret.isError())

        reportScriptError(ret);

}

//! [4]