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/**
 * Copyright 2014-2018 Fraunhofer-Gesellschaft zur Förderung der angewandten Wissenschaften e.V.
 *
 * Licensed 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.iwes.widgets.pattern.page.impl;

import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import org.json.JSONArray;
import org.json.JSONObject;
import org.ogema.core.application.ApplicationManager;
import org.ogema.core.resourcemanager.AccessPriority;
import org.ogema.core.resourcemanager.pattern.ResourcePattern;

import de.iwes.widgets.api.widgets.WidgetPage;
import de.iwes.widgets.api.widgets.sessionmanagement.OgemaHttpRequest;
import de.iwes.widgets.html.form.dropdown.DropdownOption;
import de.iwes.widgets.html.multiselect.Multiselect;
import de.iwes.widgets.html.multiselect.MultiselectData;
import de.iwes.widgets.pattern.widget.patternedit.PatternPageAnnotations.PreferredName;

// FIXME replace by generic ResourceListMultiselect?
class ResourceListMultiselect> extends Multiselect {

	private static final long serialVersionUID = 1L;
	private final Class
 targetType;
	private final ApplicationManager am;
	private boolean initialActiveStatus = true;
	private final PreferredName preferredName;
	
	public ResourceListMultiselect(WidgetPage page, String id, Class
 targetType,PreferredName preferredName, ApplicationManager am) {
		super(page, id);
		this.targetType = targetType;
		this.am = am;
		this.preferredName = preferredName;
		setDefaultWidth("100%");
	}
	
	
	private class MyOptions extends MultiselectData {

		private boolean isActive = true;
		
		public MyOptions(ResourceListMultiselect
 rlm) {
			super(rlm);
		}
		
		@Override
		public JSONObject retrieveGETData(OgemaHttpRequest req) {
			JSONObject result = super.retrieveGETData(req);
			if (!isActive) {	       
		        JSONArray array = new JSONArray();
				result.put("options", array);
				return result;
			}
			return result;
		}

		public void setActive(boolean status) {
			isActive = status;
		}

	}
	
	@Override
	public MultiselectData createNewSession() {
		return new MyOptions(this);
	}
	
	@Override
	public MyOptions getData(OgemaHttpRequest req) {
		return (ResourceListMultiselect.MyOptions) super.getData(req);
	}
	
	@Override
	protected void setDefaultValues(MultiselectData opt) {
		super.setDefaultValues(opt);
		((MyOptions) opt).setActive(initialActiveStatus);
	}
	
	@Override
	public void onGET(OgemaHttpRequest req) {
		Collection opt = getSelected(req);
		Set selected  = new HashSet();
		if (opt != null) {
			for (DropdownOption op : opt) {
				selected.add(op.id());
			}
		}
		Set options;
		List patterns = am.getResourcePatternAccess().getPatterns(targetType, AccessPriority.PRIO_LOWEST); // cannot work with type arguments here...
		options = getPatternOptions(patterns,selected,req);
		setOptions(options, req);
	}
	
	private final Set getPatternOptions(Collection patterns,Collection selected, OgemaHttpRequest req) {
		if (selected == null) selected = new HashSet();
		Set options = new LinkedHashSet();
		for (ResourcePattern res: patterns ) {
			String path  = res.model.getPath();
			String value;
			if (preferredName == PreferredName.RESOURCE_PATH || getNameService() == null) {
				value = path;
			}
			else {
				value = getNameService().getName(res.model, req.getLocale(), true,true);
				if (value==null) value=path;
			}	
			
			DropdownOption opt = new DropdownOption(path,value, selected.contains(path) );
			options.add(opt);
		}
		return options;
	}
	
	public void setActive(boolean status, OgemaHttpRequest req) {
		getData(req).setActive(status);
	}
	
	public void setInitialActiveStatus(boolean status) {
		initialActiveStatus = status;
	}
}