/*
Copyright (c) 2007, Dale Anson
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of the author nor the names of its contributors
may be used to endorse or promote products derived from this software without
specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package ise.plugin.svn.gui;

import javax.swing.*;
import java.util.*;
import org.gjt.sp.jedit.jEdit;
import ise.plugin.svn.data.RepositoryData;

/**
 * ComboBox to choose a repository.  Fills itself from jEdit properties like
 * this:
 * propertyPrefix.name.1=repository name (friendly name)
 * propertyPrefix.url.1=repository url
 * propertyPrefix.username.1=username for repository, can be null
 * propertyPrefix.password.1=password for username
 * The value of propertyPrefix.name will be displayed in the combo box dropdown.
 */
public class RepositoryComboBox extends JComboBox {

    // default prefix
    private static final String propertyPrefix = "ise.plugins.svn.repository.";

    public static final String SELECT = "-- Select --";

    DefaultComboBoxModel dropdownModel = null; // holds the display names

    // holds the repository info, keyed by name
    HashMap < String, RepositoryData > propertyMap = new HashMap < String, RepositoryData > ();

    // load a list of key/hashtable pairs
    public RepositoryComboBox( ) {
        load( null );
    }

    private void load( RepositoryData selected ) {
        // model for the previous values
        Stack<String> names = new Stack<String>();

        // fetch the property values
        String url = null;
        int i = 0;
        do {
            String name = jEdit.getProperty( propertyPrefix + "name." + i );
            url = jEdit.getProperty( propertyPrefix + "url." + i );
            String username = jEdit.getProperty( propertyPrefix + "username." + i );
            String password = jEdit.getProperty( propertyPrefix + "password." + i );

            // must have url at minimum, this also signals the end of the loop
            if ( url == null ) {
                break;
            }

            // set name to be same as url, this is partly for backward compatibility
            // since the first release didn't allow naming a repository
            if ( name == null ) {
                name = url;
            }

            // add to the stack and the property lookup table
            if ( names.search( name ) == -1 ) {
                RepositoryData data = new RepositoryData( name, url, username, password );
                propertyMap.put( name, data );
                names.push( name );
            }
            ++i;
        }
        while ( url != null );

        // sort and fill the combo box model
        Collections.sort( names );
        dropdownModel = new DefaultComboBoxModel( ( Vector ) names );

        // add and choose the 'select' choice
        if ( dropdownModel.getSize() > 0 && dropdownModel.getIndexOf( SELECT ) < 0 ) {
            dropdownModel.insertElementAt( SELECT, 0 );
        }
        setModel( dropdownModel );
        if ( dropdownModel.getSize() > 0 ) {
            if ( selected != null ) {
                setSelectedItem( selected.getName() );
            }
            else {
                setSelectedIndex( 0 );
            }
        }
    }

    @Override
    public void setEditable( boolean editable ) {
        // never editable
        super.setEditable( false );
    }

    // item might be a repository url, so lookup the corresponding repository name
    @Override
    public void setSelectedItem(Object item) {
        if (item == null) {
            return;
        }
        String url = item.toString();
        Set<Map.Entry<String, RepositoryData>> set = propertyMap.entrySet();
        for (Map.Entry<String, RepositoryData> entry : set) {
            RepositoryData rd = entry.getValue();
            String comp_url = rd.getURL();
            if (url.equals(comp_url) || url.startsWith(comp_url) || comp_url.startsWith(url)) {
                super.setSelectedItem(entry.getKey());
                return;
            }
        }
        super.setSelectedItem(item);
    }

    public void addRepository( RepositoryData data ) {
        addItem( data );
    }

    /**
     * Adds a value to the combo box.
     * @param value a value to add to the list
     */
    @Override
    public void addItem( Object value ) {
        if ( value == null || !( value instanceof RepositoryData ) ) {
            return ;
        }
        RepositoryData data = ( RepositoryData ) value;
        if ( data.getURL() == null ) {
            return ;
        }
        if ( data.getName() == null ) {
            data.setName( data.getURL() );
        }
        propertyMap.put( data.getName(), data );
        save( data );
    }

    public void removeRepository( RepositoryData value ) {
        if ( value == null || !( value instanceof RepositoryData ) ) {
            return ;
        }
        RepositoryData data = ( RepositoryData ) value;
        if ( data.getURL() == null ) {
            return ;
        }
        if ( data.getName() == null ) {
            data.setName( data.getURL() );
        }
        super.removeItem( data.getName() );
        propertyMap.remove( data.getName() );
        save( null );
    }

    // could return null if SELECT is the current selection
    public RepositoryData getSelectedRepository() {
        String name = ( String ) super.getSelectedItem();
        return propertyMap.get( name );
    }

    /**
     * Saves the current list in the combo box to the jEdit property file.
     */
    public void save( RepositoryData selected ) {
        if (selected != null) {
            String name = selected.getName() == null ? selected.getURL() : selected.getName();
            propertyMap.put(name, selected);
        }

        // clear the old property values, this removes the property values from
        // the jEdit property file for all repository data, new values will be
        // written below.
        String url = null;
        int i = 0;
        do {
            jEdit.unsetProperty( propertyPrefix + "name." + i );
            jEdit.unsetProperty( propertyPrefix + "url." + i );
            jEdit.unsetProperty( propertyPrefix + "username." + i );
            jEdit.unsetProperty( propertyPrefix + "password." + i );
            ++i;
        }
        while ( url != null );

        // save the new values
        i = 0;
        Set < Map.Entry < String, RepositoryData >> set = propertyMap.entrySet();
        for ( Map.Entry me : set ) {
            String key = ( String ) me.getKey();
            if ( key != null ) {
                RepositoryData value = ( RepositoryData ) me.getValue();
                if ( value != null ) {
                    if ( value.getURL() == null ) {
                        continue;
                    }
                    if ( value.getName() == null ) {
                        value.setName( value.getURL() );
                    }
                    jEdit.setProperty( propertyPrefix + "name." + i, value.getName() );
                    jEdit.setProperty( propertyPrefix + "url." + i, value.getURL() );
                    if ( value.getUsername() != null ) {
                        jEdit.setProperty( propertyPrefix + "username." + i, value.getUsername() );
                    }
                    if ( value.getPassword() != null ) {
                        jEdit.setProperty( propertyPrefix + "password." + i, value.getPassword() );
                    }
                }
            }
            ++i;
        }
        load( selected );
    }
}