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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 java.util.Random;

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

import org.apache.struts2.views.annotations.StrutsTag;
import org.apache.struts2.views.annotations.StrutsTagAttribute;
import org.apache.struts2.views.annotations.StrutsTagSkipInheritance;

import com.opensymphony.xwork2.util.ValueStack;

/**
 * 
 * 
 * A tag that creates an HTML <a/> element, that when clicked makes an
 * asynchronous request(XMLHttpRequest). The url attribute must be build using
 * the <s:url/> tag.
 * 
 * 
 * 
 * Examples
 * 
 * 
 * 
 * 
 *  * <div id="div1">Div 1</div>
 * <s:url id="ajaxTest" value="/AjaxTest.action"/>
 * 
 * <sj:a id="link1" href="%{ajaxTest}" target="div1"> Update Content </sj:a>
 * 
 * 
 * 
 * 
 * 
 * 
 *  * <s:form id="form" action="AjaxTest">
 * <input type="textbox" name="data"> </s:form>
 * 
 * <sj:a formId="form" targets="div1">Submit form</sj:a>
 * 
 * 
 * 
 * 
 * @author Johannes Geppert
 * 
 */
@StrutsTag(name = "a", tldTagClass = "com.jgeppert.struts2.jquery.views.jsp.ui.AnchorTag", description = "Renders an HTML anchor element that when clicked calls a URL via remote XMLHttpRequest and updates its targets content", allowDynamicAttributes = true)
public class Anchor extends AbstractRemoteBean implements ButtonBean {
    public static final String TEMPLATE = "a";
    public static final String TEMPLATE_CLOSE = "a-close";
    public static final String COMPONENT_NAME = Anchor.class.getName();
    public static final transient Random RANDOM = new Random();
    public static final String JQUERYACTION = "anchor";

    protected String openDialog;
    protected String onClickTopics;
    protected String validate;
    protected String validateFunction;
    protected String button;
    protected String buttonIcon;
    protected String buttonIconSecondary;
    protected String buttonText;

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

    public String getDefaultOpenTemplate() {
	return TEMPLATE;
    }

    protected String getDefaultTemplate() {
	return TEMPLATE_CLOSE;
    }

    public String getComponentName() {
	return COMPONENT_NAME;
    }

    public void evaluateExtraParams() {
	super.evaluateExtraParams();

	addParameter("jqueryaction", JQUERYACTION);

	if (openDialog != null)
	    addParameter("openDialog", findString(openDialog));
	if (onClickTopics != null)
	    addParameter("onClickTopics", findString(onClickTopics));
	if (button != null)
	    addParameter("button", findValue(this.button, Boolean.class));
	if (buttonIcon != null)
	    addParameter("buttonIcon", findString(buttonIcon));
	if (buttonIconSecondary != null)
	    addParameter("buttonIconSecondary", findString(buttonIconSecondary));
	if (buttonText != null)
	    addParameter("buttonText", findValue(this.buttonText, Boolean.class));
	if (validate != null)
	    addParameter("validate", findValue(this.validate, Boolean.class));
	if (validateFunction != null)
	    addParameter("validateFunction", findString(validateFunction));

	if ((this.id == null || this.id.length() == 0)) {
	    // resolves Math.abs(Integer.MIN_VALUE) issue reported by FindBugs
	    // http://findbugs.sourceforge.net/bugDescriptions.html#RV_ABSOLUTE_VALUE_OF_RANDOM_INT
	    int nextInt = RANDOM.nextInt();
	    nextInt = nextInt == Integer.MIN_VALUE ? Integer.MAX_VALUE : Math
		    .abs(nextInt);
	    this.id = "anchor_" + String.valueOf(nextInt);
	    addParameter("id", this.id);
	}
    }

    @Override
    @StrutsTagSkipInheritance
    public void setTheme(String theme) {
	super.setTheme(theme);
    }

    @Override
    public String getTheme() {
	return "jquery";
    }

    @StrutsTagAttribute(description = "id of dialog that will be opened when clicked.")
    public void setOpenDialog(String openDialog) {
	this.openDialog = openDialog;
    }

    @StrutsTagAttribute(name = "onClickTopics", description = "A comma delimited list of topics that published when the element is clicked", type = "String", defaultValue = "")
    public void setOnClickTopics(String onClickTopics) {
	this.onClickTopics = onClickTopics;
    }

    @StrutsTagAttribute(description = "jQuery UI Button", defaultValue = "false", type = "Boolean")
    public void setButton(String button) {
	this.button = button;
    }

    @StrutsTagAttribute(description = "Icons to display. The primary icon is displayed on the left of the label text. Value must be a classname (String), eg. ui-icon-gear.")
    public void setButtonIcon(String buttonIcon) {
	this.buttonIcon = buttonIcon;
    }

    @StrutsTagAttribute(description = "Icons to display. The secondary icon is displayed on the right of the label text. Value must be a classname (String), eg. ui-icon-gear.")
    public void setButtonIconSecondary(String buttonIconSecondary) {
	this.buttonIconSecondary = buttonIconSecondary;
    }

    @StrutsTagAttribute(description = "Whether to show any text - when set to false (display no text), icons (see icons option) must be enabled, otherwise it'll be ignored.", defaultValue = "true", type = "Boolean")
    public void setButtonText(String buttonText) {
	this.buttonText = buttonText;
    }

    @StrutsTagAttribute(description = "A function that handle the client validation result. eg.: myValidation(form, errors)")
    public void setValidateFunction(String validateFunction) {
	this.validateFunction = validateFunction;
    }

    @StrutsTagAttribute(description = "Enable client AJAX validation", defaultValue = "false", type = "Boolean")
    public void setValidate(String validate) {
	this.validate = validate;
    }
}