// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.GWT.forms.client.nonpublic;

import java.util.*;

import org.litesoft.core.typeutils.*;
import org.litesoft.ui.def.nonpublic.support.*;

public class ActionAdapterManager
{
    private FormActionAdapter[] mAdapters = FormActionAdapter.EMPTY_ARRAY;
    private Map mAdaptersByActionID = new HashMap();

    private FormActionAdapter[] getFor( String pActionID )
    {
        Object o = mAdaptersByActionID.get( pActionID );
        return (o == null) ? FormActionAdapter.EMPTY_ARRAY : (FormActionAdapter[]) o;
    }

    public void dispose()
    {
        mAdapters = FormActionAdapter.EMPTY_ARRAY;
        mAdaptersByActionID.clear();
    }

    public void add( FormActionAdapter pActionAdapter )
    {
        if ( pActionAdapter != null )
        {
            mAdapters = FormActionAdapter.Helper.append( mAdapters, pActionAdapter );
            String actionID = pActionAdapter.getActionID();
            FormActionAdapter[] adapters = FormActionAdapter.Helper.append( getFor( actionID ), pActionAdapter );
            mAdaptersByActionID.put( actionID, adapters );
        }
    }

    public void apply( FormDataRowKey pFormDataRowKey, ActionUpdateFormData[] pActionUpdatesNonNullOrEmpty )
    {
        for ( int i = 0; i < pActionUpdatesNonNullOrEmpty.length; i++ )
        {
            ActionUpdateFormData update = pActionUpdatesNonNullOrEmpty[i];
            if ( Objects.areNonArraysEqual( pFormDataRowKey, update.getFormDataRowKey() ) )
            {
                setActionDisabled( update.getActionID(), update.getDisabled() );
            }
        }
    }

    public void updateInputState( boolean pAnyChanged, boolean pAnyErrors )
    {
        for ( int i = 0; i < mAdapters.length; i++ )
        {
            FormActionAdapter adapter = mAdapters[i];
            Boolean changeStateEnablement = adapter.getInputChangeStateEnablement();
            Boolean errorStateEnablement = adapter.getInputErrorStateEnablement();
            Boolean change = merge( null, changeStateEnablement, pAnyChanged );
            change = merge( change, errorStateEnablement, pAnyErrors );
            if ( change != null )
            {
                adapter.setEnabled( change.booleanValue() );
            }
        }
    }

    public boolean setActionDisabled( String pActionID, boolean pDisabled )
    {
        FormActionAdapter[] adapters = getFor( pActionID );
        for ( int i = 0; i < adapters.length; i++ )
        {
            FormActionAdapter adapter = adapters[i];
            adapter.setDisabled( pDisabled );
        }
        return (adapters.length != 0);
    }

    public boolean setFocus()
    {
        for ( int i = 0; i < mAdapters.length; i++ )
        {
            FormActionAdapter adapter = mAdapters[i];
            if ( adapter.isVisible() && adapter.isEnabled() )
            {
                if ( adapter.setFocus() )
                {
                    return true;
                }
            }
        }
        return false;
    }

    private Boolean merge( Boolean pExisting, Boolean pStateEnablement, boolean pState )
    {
        if ( Boolean.FALSE.equals( pExisting ) || (pStateEnablement == null) )
        {
            return pExisting;
        }
        return Boolean.valueOf( pState == pStateEnablement.booleanValue() );
    }
}