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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 com.jgeppert.struts2.jquery.components;

import com.opensymphony.xwork2.util.ValueStack;
import org.apache.commons.lang3.StringUtils;
import org.apache.struts2.components.Component;
import org.apache.struts2.components.Form;
import org.apache.struts2.views.annotations.StrutsTagAttribute;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author Johannes Geppert
 */
public abstract class AbstractFormElement extends AbstractContainer {

    private static final String PARAM_PARENT_THEME = "parentTheme";
    private static final String PARAM_FORM_IDS = "formIds";

    protected String parentTheme;

    public AbstractFormElement(ValueStack stack, HttpServletRequest request, HttpServletResponse response) {
        super(stack, request, response);
    }

    public void evaluateExtraParams() {
        super.evaluateExtraParams();
        final Component ancestor = findAncestor(Form.class);

        if (parentTheme != null) {
            addParameter(PARAM_PARENT_THEME, findString(parentTheme));
        } else if (ancestor != null) {
            Form form = (Form) ancestor;
            addParameter(PARAM_PARENT_THEME, form.getTheme());
        } else {
            addParameter(PARAM_PARENT_THEME, "simple");
        }

        if (ancestor != null && StringUtils.isBlank(formIds)) {
            addParameter(PARAM_FORM_IDS, ((Form) ancestor).getId());
        }
    }

    @StrutsTagAttribute(description = "The parent theme. Default: value of parent form tag or simple if no parent form tag is available")
    public void setParentTheme(String parentTheme) {
        this.parentTheme = parentTheme;
    }
}