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/*

 * gvSIG. Desktop Geographic Information System.

 * 

 * Copyright (C) 2007-2020 gvSIG Association.

 * 

 * 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 3

 * of the License, or (at your option) any later version.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License 

 * along with this program. If not, see <https://www.gnu.org/licenses/>. 

 * 

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.vcsgis.lib.workspace;

import java.util.Date;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.DataManager;

import org.gvsig.fmap.dal.store.jdbc.JDBCServerExplorerParameters;

import org.gvsig.fmap.dal.store.jdbc2.JDBCServerExplorer;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dispose.DisposeUtils;

import org.gvsig.tools.dispose.impl.AbstractDisposable;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.exception.BaseException;

import org.gvsig.tools.persistence.PersistenceManager;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.persistence.exception.PersistenceException;

import org.gvsig.vcsgis.lib.VCSGisLocator;

import org.gvsig.vcsgis.lib.VCSGisManager;

/**

 *

 * @author gvSIG Team

 */

@SuppressWarnings("UseSpecificCatch")

public class VCSGisWorkspaceDescriptorImpl extends AbstractDisposable implements VCSGisWorkspaceDescriptor 

    {

    private String label;

    private String code;

    private JDBCServerExplorerParameters explorerParameters;

    private JDBCServerExplorer explorer;

    private VCSGisWorkspace workspace;

    private long lastUse;

    public VCSGisWorkspaceDescriptorImpl() {

    }

    public VCSGisWorkspaceDescriptorImpl(VCSGisWorkspace workspace) {

        setWorkspace(workspace);

    }

    @Override

    public String getCode() {

        return this.code;

    }

    @Override

    public boolean isWorkspaceInitialized() {

        return this.workspace != null;

    }

    @Override

    public VCSGisWorkspace getWorkspace() {

        if( this.workspace == null ) {

            VCSGisManager manager = VCSGisLocator.getVCSGisManager();

            this.workspace = manager.openWorkspace(this.getExplorer());

        }

        lastUse = new Date().getTime();

        DisposeUtils.bind(this.workspace);

        return this.workspace;

    }

    @Override

    public String getLabel() {

        return this.label;

    }

    @Override

    public VCSGisWorkspaceDescriptor getValue() {

        return this;

    }

    @Override

    public JDBCServerExplorer getExplorer() {

        if (this.explorer == null) {

            if (this.workspace == null) {

                try {

                    DataManager manager = DALLocator.getDataManager();

                    this.explorer = (JDBCServerExplorer) manager.openServerExplorer(

                            this.explorerParameters.getProviderName(),

                            this.explorerParameters

                    );

                } catch (Exception ex) {

                    throw new RuntimeException(ex);

                }

            } else {

                this.explorer = this.workspace.getExplorer();

            }

//            DisposeUtils.bind(this.explorer);

        }

        DisposeUtils.bind(this.explorer);

        return this.explorer;

    }

    @Override

    public JDBCServerExplorerParameters getExplorerParameters() {

        return this.explorerParameters;

    }

    @Override

    public void saveToState(PersistentState state) throws PersistenceException {

        state.set("label", this.label);

        state.set("code", this.code);

        state.set("explorerParameters", this.explorerParameters);

    }

    @Override

    public void loadFromState(PersistentState state) throws PersistenceException {

        this.code = state.getString("code");

        this.label = state.getString("label");

        this.explorerParameters = (JDBCServerExplorerParameters) state.get("explorerParameters");

    }

    public static void selfRegister() {

        PersistenceManager manager = ToolsLocator.getPersistenceManager();

        if (manager.getDefinition("VCSGisWorkspaceDescriptor")== null) {

            DynStruct definition = manager.addDefinition(VCSGisWorkspaceDescriptorImpl.class,

                    "VCSGisWorkspaceDescriptor",

                    "VCSGisWorkspaceDescriptor persistent definition",

                    null,

                    null

            );

            definition.addDynFieldString("code");

            definition.addDynFieldString("label");

            definition.addDynFieldObject("explorerParameters")

                .setClassOfValue(JDBCServerExplorerParameters.class)

                .setMandatory(true);

        }

    }

    @Override

    public String toString() {

        return this.getLabel();

    }

    /**

     * Only for testing purposes

     * @param workspace

     */

    public void setWorkspace(VCSGisWorkspace workspace) {

        if(workspace == null){

            throw new IllegalArgumentException("workspace can't be null.");

        }

        DisposeUtils.disposeQuietly(this.workspace);

        DisposeUtils.disposeQuietly(this.explorer);

        this.workspace = workspace;

        DisposeUtils.bind(this.workspace);

        this.explorerParameters = workspace.getExplorerParameters();

        this.explorer = null;

        this.label = workspace.getLabel();

        this.code = workspace.getCode();

        lastUse = new Date().getTime();

    }

    @Override

    protected void doDispose() throws BaseException {

        DisposeUtils.disposeQuietly(this.workspace);

        DisposeUtils.disposeQuietly(this.explorer);

        this.explorerParameters = null;

        this.explorer = null;

        this.workspace = null;

//        this.label = null; //Don't null for debugging purposses

        this.code = null;

    }

    public void dropExpiredCaches() {

        long now = new Date().getTime();

        if (now > this.lastUse+60000) {

            dropCaches();

        }

    }

    public void dropCaches() {

        DisposeUtils.disposeQuietly(this.workspace);

        DisposeUtils.disposeQuietly(this.explorer);

        this.workspace = null;

        this.explorer = null;

    }

}