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

import org.litesoft.commonfoundation.base.*;
import org.litesoft.ui.def.nonpublic.support.*;

import java.util.*;

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 ( Currently.areEqual( 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() );
    }
}