/***************************************************************************
 *   Copyright (C) 2008 by Pino Toscano <pino@kde.org>                     *
 *   Copyright (C) 2008 by Harri Porten <porten@kde.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.                                   *
 ***************************************************************************/

#include "kjs_console_p.h"

#include <kjs/kjsobject.h>
#include <kjs/kjsprototype.h>
#include <kjs/kjsarguments.h>

#include <QDebug>

#include "../debug_p.h"

using namespace Okular;

static KJSPrototype *g_consoleProto;

#ifdef OKULAR_JS_CONSOLE

#include <qlayout.h>
#include <qplaintextedit.h>

#include <kdialog.h>
#include <kstandardguiitem.h>

K_GLOBAL_STATIC( KDialog, g_jsConsoleWindow )
static QPlainTextEdit *g_jsConsoleLog = 0;

static void createConsoleWindow()
{
    if ( g_jsConsoleWindow.exists() )
        return;

    g_jsConsoleWindow->setButtons( KDialog::Close | KDialog::User1 );
    g_jsConsoleWindow->setButtonGuiItem( KDialog::User1, KStandardGuiItem::clear() );

    QVBoxLayout *mainLay = new QVBoxLayout( g_jsConsoleWindow->mainWidget() );
    mainLay->setMargin( 0 );
    g_jsConsoleLog = new QPlainTextEdit( g_jsConsoleWindow->mainWidget() );
    g_jsConsoleLog->setReadOnly( true );
    mainLay->addWidget( g_jsConsoleLog );

    QObject::connect( g_jsConsoleWindow, SIGNAL(closeClicked()),
                      g_jsConsoleWindow, SLOT(close()) );
    QObject::connect( g_jsConsoleWindow, SIGNAL(user1Clicked()),
                      g_jsConsoleLog, SLOT(clear()) );
}

static void showConsole()
{
    createConsoleWindow();
    g_jsConsoleWindow->show();
}

static void hideConsole()
{
    if ( !g_jsConsoleWindow.exists() )
        return;

    g_jsConsoleWindow->hide();
}

static void clearConsole()
{
    if ( !g_jsConsoleWindow.exists() )
        return;

    g_jsConsoleLog->clear();
}

static void outputToConsole( const QString &message )
{
    showConsole();
    g_jsConsoleLog->appendPlainText( message );
}

#else /* OKULAR_JS_CONSOLE */

static void showConsole()
{
}

static void hideConsole()
{
}

static void clearConsole()
{
}

static void outputToConsole( const QString &cMessage )
{
    qCDebug(OkularCoreDebug) << "CONSOLE:" << cMessage;
}

#endif /* OKULAR_JS_CONSOLE */

static KJSObject consoleClear( KJSContext *, void *, const KJSArguments & )
{
    clearConsole();
    return KJSUndefined();
}

static KJSObject consoleHide( KJSContext *, void *, const KJSArguments & )
{
    hideConsole();
    return KJSUndefined();
}

static KJSObject consolePrintln( KJSContext *ctx, void *,
                                 const KJSArguments &arguments )
{
    QString cMessage = arguments.at( 0 ).toString( ctx );
    outputToConsole( cMessage );

    return KJSUndefined();
}

static KJSObject consoleShow( KJSContext *, void *, const KJSArguments & )
{
    showConsole();
    return KJSUndefined();
}

void JSConsole::initType( KJSContext *ctx )
{
    static bool initialized = false;
    if ( initialized )
        return;
    initialized = true;

    g_consoleProto = new KJSPrototype();

    g_consoleProto->defineFunction( ctx, QStringLiteral("clear"), consoleClear );
    g_consoleProto->defineFunction( ctx, QStringLiteral("hide"), consoleHide );
    g_consoleProto->defineFunction( ctx, QStringLiteral("println"), consolePrintln );
    g_consoleProto->defineFunction( ctx, QStringLiteral("hide"), consoleShow );
}

KJSObject JSConsole::object( KJSContext *ctx )
{
    return g_consoleProto->constructObject( ctx, nullptr );
}
