/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

package com.sun.star.script.framework.browse;

import com.sun.star.lib.uno.helper.PropertySet;
import com.sun.star.uno.Any;
import com.sun.star.uno.AnyConverter;
import com.sun.star.uno.Type;
import com.sun.star.uno.XComponentContext;
import com.sun.star.uno.UnoRuntime;

import com.sun.star.lang.XMultiComponentFactory;

import com.sun.star.ucb.XSimpleFileAccess;

import com.sun.star.beans.XIntrospectionAccess;
import com.sun.star.script.XInvocation;

import com.sun.star.script.browse.XBrowseNode;
import com.sun.star.script.browse.BrowseNodeTypes;

import com.sun.star.script.framework.provider.ScriptProvider;
import com.sun.star.script.framework.log.*;
import com.sun.star.script.framework.container.*;
import com.sun.star.script.framework.browse.DialogFactory;

import java.util.*;
import javax.swing.JOptionPane;

public class ProviderBrowseNode extends PropertySet
    implements XBrowseNode, XInvocation
{
    protected ScriptProvider provider;
    protected Collection browsenodes;
    protected String name;
    protected ParcelContainer container;
    protected Parcel parcel;
    protected XComponentContext m_xCtx;

    public boolean deletable = true;
    public boolean creatable = true;
    public boolean editable = false;

    public ProviderBrowseNode( ScriptProvider provider, ParcelContainer container, XComponentContext xCtx ) {
        LogUtils.DEBUG("*** ProviderBrowseNode ctor");
        this.container = container;
        this.name = this.container.getLanguage();
        this.provider = provider;
        this.m_xCtx = xCtx;

        registerProperty("Deletable", new Type(boolean.class),
            (short)0, "deletable");
        registerProperty("Creatable", new Type(boolean.class),
            (short)0, "creatable");
        registerProperty("Editable", new Type(boolean.class),
            (short)0, "editable");
        XSimpleFileAccess xSFA = null;
        XMultiComponentFactory xFac = m_xCtx.getServiceManager();
        try
        {
            xSFA = ( XSimpleFileAccess)
                UnoRuntime.queryInterface( XSimpleFileAccess.class,
                    xFac.createInstanceWithContext(
                        "com.sun.star.ucb.SimpleFileAccess",
                        xCtx ) );
            if (  container.isUnoPkg() || xSFA.isReadOnly( container.getParcelContainerDir() ) )
            {
                deletable = false;
                creatable = false;
            }
        }
        // TODO propage errors
        catch( com.sun.star.uno.Exception e )
        {
                LogUtils.DEBUG("Caught exception in creation of ProviderBrowseNode ");
                LogUtils.DEBUG( LogUtils.getTrace(e));

        }
    }

    public String getName() {
        return name;
    }

    public XBrowseNode[] getChildNodes() {
        LogUtils.DEBUG("***** ProviderBrowseNode.getChildNodes()");
        if ( hasChildNodes() )
        {
            // needs initialisation?
            LogUtils.DEBUG("** ProviderBrowseNode.getChildNodes(), container is " + container );
            String[] parcels = container.getElementNames();
            browsenodes = new ArrayList( parcels.length );
            for ( int index = 0; index < parcels.length; index++ )
            {
                try
                {
                    XBrowseNode node  = new ParcelBrowseNode( provider, container, parcels[ index ] );
                    browsenodes.add( node );
                }
                catch ( Exception e )
                {
                    LogUtils.DEBUG("*** Failed to create parcel node for " + parcels[ index ] );
                    LogUtils.DEBUG( e.toString() );
                }
            }
            ParcelContainer[] packageContainers = container.getChildContainers();
            LogUtils.DEBUG("**** For container named " + container.getName() + " with root path " + container.getParcelContainerDir() + " has " + packageContainers.length + " child containers " );

            for ( int i = 0; i < packageContainers.length; i++ )
            {
                XBrowseNode node = new PkgProviderBrowseNode( provider, packageContainers[ i ], m_xCtx );
                browsenodes.add( node );
            }
        }
        else
        {
            LogUtils.DEBUG("*** No container available");
            return new XBrowseNode[0];
        }
        return ( XBrowseNode[] )browsenodes.toArray( new XBrowseNode[0] );
    }

    public boolean hasChildNodes() {
        boolean result = true;

        if ( container == null ||
             ( !container.hasElements() &&
               container.getChildContainers().length == 0 ) )
        {
            result = false;
        }

        LogUtils.DEBUG("***** ProviderBrowseNode.hasChildNodes(): " +
            "name=" + name +
            ", path=" + container.getParcelContainerDir() +
            ", result=" + result );

        return result;
    }

    public short getType() {
        return BrowseNodeTypes.CONTAINER;
    }

    public String toString()
    {
        return getName();
    }

    // implementation of XInvocation interface
    public XIntrospectionAccess getIntrospection() {
        return null;
    }

    public Object invoke(String aFunctionName, Object[] aParams,
                         short[][] aOutParamIndex, Object[][] aOutParam)
        throws com.sun.star.lang.IllegalArgumentException,
               com.sun.star.script.CannotConvertException,
               com.sun.star.reflection.InvocationTargetException
    {
        // Initialise the out parameters - not used but prevents error in
        // UNO bridge
        aOutParamIndex[0] = new short[0];
        aOutParam[0] = new Object[0];

        Any result = new Any(new Type(Boolean.class), Boolean.TRUE);

        if (aFunctionName.equals("Creatable"))
        {
            try
            {
                String name;

                if (aParams == null || aParams.length < 1 ||
                    AnyConverter.isString(aParams[0]) == false)
                {
                    String prompt = "Enter name for new Parcel";
                    String title = "Create Parcel";

                    // try to get a DialogFactory instance, if it fails
                    // just use a Swing JOptionPane to prompt for the name
                    try
                    {
                        DialogFactory dialogFactory =
                            DialogFactory.getDialogFactory();

                        name = dialogFactory.showInputDialog(title, prompt);
                    }
                    catch (Exception e)
                    {
                        name = JOptionPane.showInputDialog(null, prompt, title,
                            JOptionPane.QUESTION_MESSAGE);
                    }
                }
                else {
                    name = (String) AnyConverter.toString(aParams[0]);
                }

                if (name == null || name.equals(""))
                {
                    result =  new Any(new Type(Boolean.class), Boolean.FALSE);
                }
                else
                {

                    Object newParcel  = container.createParcel( name );
                    LogUtils.DEBUG("Parcel created " + name + " " + newParcel );
                    if ( newParcel == null )
                    {
                        result =  new Any(new Type(Boolean.class), Boolean.FALSE);
                    }
                    else
                    {
                        ParcelBrowseNode parcel = new ParcelBrowseNode( provider, container, name );
                        LogUtils.DEBUG("created parcel node ");
                        if ( browsenodes == null )
                        {
                            browsenodes = new ArrayList( 5 );
                        }

                        browsenodes.add(parcel);


                        result = new Any(new Type(XBrowseNode.class), parcel);
                    }
                }
            }
            catch (Exception e)
            {
        LogUtils.DEBUG("ProviderBrowseNode[create] failed with: " + e );
                LogUtils.DEBUG( LogUtils.getTrace( e ) );
                result = new Any(new Type(Boolean.class), Boolean.FALSE);

                // throw new com.sun.star.reflection.InvocationTargetException(
                //     "Error creating script: " + e.getMessage());
            }
        }
        else {
            throw new com.sun.star.lang.IllegalArgumentException(
                "Function " + aFunctionName + " not supported.");
        }

        return result;
    }

    public void setValue(String aPropertyName, Object aValue)
        throws com.sun.star.beans.UnknownPropertyException,
               com.sun.star.script.CannotConvertException,
               com.sun.star.reflection.InvocationTargetException
    {
    }

    public Object getValue(String aPropertyName)
        throws com.sun.star.beans.UnknownPropertyException
    {
        return null;
    }

    public boolean hasMethod(String aName) {
        return false;
    }

    public boolean hasProperty(String aName) {
        return false;
    }
}