/*
 * 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.beans.XIntrospectionAccess;

import com.sun.star.container.ElementExistException;
import com.sun.star.container.NoSuchElementException;

import com.sun.star.lang.NoSupportException;
import com.sun.star.lang.WrappedTargetException;
import com.sun.star.lang.XMultiComponentFactory;

import com.sun.star.lib.uno.helper.PropertySet;

import com.sun.star.reflection.InvocationTargetException;

import com.sun.star.script.XInvocation;
import com.sun.star.script.browse.BrowseNodeTypes;
import com.sun.star.script.browse.XBrowseNode;
import com.sun.star.script.framework.container.Parcel;
import com.sun.star.script.framework.container.ScriptEntry;
import com.sun.star.script.framework.container.ScriptMetaData;
import com.sun.star.script.framework.log.LogUtils;
import com.sun.star.script.framework.provider.ScriptProvider;
import com.sun.star.script.provider.XScriptContext;

import com.sun.star.ucb.XSimpleFileAccess;

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

import java.util.HashMap;

public class ScriptBrowseNode extends PropertySet implements
    XBrowseNode, XInvocation {

    private final ScriptProvider provider;

    private Parcel parent;
    private String name;

    private boolean editable;
    private boolean deletable = false;
    private boolean renamable = false;

    public ScriptBrowseNode(ScriptProvider provider, Parcel parent, String name) {

        this.provider = provider;
        this.name = name;
        this.parent = parent;
        XComponentContext xCtx = provider.getScriptingContext().getComponentContext();
        XMultiComponentFactory xFac = xCtx.getServiceManager();

        try {
            XSimpleFileAccess xSFA = UnoRuntime.queryInterface(
                                         XSimpleFileAccess.class,
                                         xFac.createInstanceWithContext(
                                             "com.sun.star.ucb.SimpleFileAccess",
                                             xCtx));

            if (provider.hasScriptEditor()) {
                this.editable = true;

                try {
                    if (!parent.isUnoPkg()
                        && !xSFA.isReadOnly(parent.getPathToParcel())) {

                        this.deletable = true;
                        this.renamable = true;

                    }
                }
                // TODO propagate errors
                catch (Exception e) {
                    LogUtils.DEBUG("Caught exception in creation of ScriptBrowseNode");
                    LogUtils.DEBUG(LogUtils.getTrace(e));
                }

            }

        }
        // TODO fix exception types to be caught here, should we rethrow?
        catch (Exception e) {

            LogUtils.DEBUG("** caught exception getting script data for " + name +
                           " ->" + e.toString());

        }

        registerProperty("Deletable", new Type(boolean.class), (short)0, "deletable");
        registerProperty("Editable", new Type(boolean.class), (short)0, "editable");
        registerProperty("Renamable", new Type(boolean.class), (short)0, "renamable");
        registerProperty("URI", new Type(String.class), (short)0, "uri");
        registerProperty("Description", new Type(String.class), (short)0,
                         "description");
    }

    public String getName() {
        return name;
    }

    public XBrowseNode[] getChildNodes() {
        return new XBrowseNode[0];
    }

    public boolean hasChildNodes() {
        return false;
    }

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

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

    public void updateURI(Parcel p) {
        parent = p;
        ScriptMetaData data = null;

        try {
            data = (ScriptMetaData)parent.getByName(name);
        }
        // TODO fix exception types to be caught here, should we rethrow?
        catch (Exception e) {
            LogUtils.DEBUG("** caught exception getting script data for " + name +
                           " ->" + e.toString());
        }
    }
    // 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("Editable")) {
            if (!editable) {

                NoSupportException nse =
                    new NoSupportException(aFunctionName + " is not editable ");

                throw new InvocationTargetException(
                    "Scripting framework error editing script", null, nse);

            }

            XScriptContext ctxt = provider.getScriptingContext();
            ScriptMetaData data = null;

            try {
                data = (ScriptMetaData)parent.getByName(name);
            } catch (NoSuchElementException nse) {
                throw new com.sun.star.lang.IllegalArgumentException(nse,
                    name + " does not exist or can't be found ");
            } catch (com.sun.star.lang.WrappedTargetException wte) {
                // rethrow
                throw new InvocationTargetException(
                    "Scripting framework editing script ", null, wte.TargetException);
            }

            provider.getScriptEditor().edit(ctxt, data);
        } else if (aFunctionName.equals("Deletable")) {
            if (!deletable) {

                NoSupportException nse = new NoSupportException(
                    aFunctionName + " is not supported for this node");

                throw new InvocationTargetException(
                    "Scripting framework error deleting script", null, nse);
            }

            try {
                parent.removeByName(name);
                result = new Any(new Type(Boolean.class), Boolean.TRUE);
            } catch (NoSuchElementException nse) {
                throw new com.sun.star.lang.IllegalArgumentException(nse,
                    name + " does not exist or can't be found ");
            } catch (WrappedTargetException wte) {
                // rethrow
                throw new InvocationTargetException(
                    "Scripting framework deleting script ", null, wte.TargetException);
            }

        } else if (aFunctionName.equals("Renamable")) {
            result = new Any(new Type(XBrowseNode.class), new XBrowseNode[0]);

            if (!renamable) {

                NoSupportException nse = new NoSupportException(
                    aFunctionName + " is not supported for this node");

                throw new InvocationTargetException(
                    "Scripting framework error renaming script", null, nse);
            }

            try {
                String newName = AnyConverter.toString(aParams[0]);
                ScriptMetaData oldData = (ScriptMetaData)parent.getByName(name);
                oldData.loadSource();
                String oldSource = oldData.getSource();

                LogUtils.DEBUG("Create renamed script");

                String languageName =
                    newName + "." + provider.getScriptEditor().getExtension();

                String language = provider.getName();

                ScriptEntry entry = new ScriptEntry(language, languageName, "",
                                                    new HashMap<String, String>());

                ScriptMetaData data =
                    new ScriptMetaData(parent, entry, oldSource);

                parent.insertByName(languageName, data);

                LogUtils.DEBUG("Now remove old script");
                parent.removeByName(name);

                name = languageName;
                result = new Any(new Type(XBrowseNode.class), this);
            } catch (NoSuchElementException nse) {
                throw new com.sun.star.lang.IllegalArgumentException(nse,
                    name + " does not exist or can't be found ");
            } catch (ElementExistException eee) {
                // rethrow
                throw new InvocationTargetException(
                    "Scripting framework error renaming script ", null, eee);
            } catch (WrappedTargetException wte) {
                // rethrow
                throw new InvocationTargetException(
                    "Scripting framework rename script ", null, wte.TargetException);
            }
        } 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;
    }
}