/**
 * (The MIT License)
 *
 * Copyright (c) 2008 - 2011:
 *
 * * {Aaron Patterson}[http://tenderlovemaking.com]
 * * {Mike Dalessio}[http://mike.daless.io]
 * * {Charles Nutter}[http://blog.headius.com]
 * * {Sergio Arbeo}[http://www.serabe.com]
 * * {Patrick Mahoney}[http://polycrystal.org]
 * * {Yoko Harada}[http://yokolet.blogspot.com]
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * 'Software'), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package nokogiri;

import static nokogiri.internals.NokogiriHelpers.getNokogiriClass;

import org.jruby.Ruby;
import org.jruby.RubyArray;
import org.jruby.RubyClass;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * DTD attribute declaration.
 *
 * @author Patrick Mahoney <pat@polycrystal.org>
 */
@JRubyClass(name="Nokogiri::XML::AttributeDecl", parent="Nokogiri::XML::Node")
public class XmlAttributeDecl extends XmlNode {

    public XmlAttributeDecl(Ruby ruby, RubyClass klass) {
        super(ruby, klass);
        throw ruby.newRuntimeError("node required");
    }

    /**
     * Initialize based on an attributeDecl node from a NekoDTD parsed
     * DTD.
     *
     * Internally, XmlAttributeDecl combines these into a single node.
     */
    public XmlAttributeDecl(Ruby ruby, RubyClass klass, Node attrDeclNode) {
        super(ruby, klass, attrDeclNode);
    }

    static XmlAttributeDecl create(ThreadContext context, Node attrDeclNode) {
        return new XmlAttributeDecl(context.runtime,
            getNokogiriClass(context.runtime, "Nokogiri::XML::AttributeDecl"),
            attrDeclNode
        );
    }

    @Override
    @JRubyMethod
    public IRubyObject node_name(ThreadContext context) {
        return attribute_name(context);
    }

    @Override
    @JRubyMethod(name = "node_name=")
    public IRubyObject node_name_set(ThreadContext context, IRubyObject name) {
        throw context.runtime.newRuntimeError("cannot change name of DTD decl");
    }

    public IRubyObject element_name(ThreadContext context) {
        return getAttribute(context, "ename");
    }

    public IRubyObject attribute_name(ThreadContext context) {
        return getAttribute(context, "aname");
    }

    @JRubyMethod
    public IRubyObject attribute_type(ThreadContext context) {
        return getAttribute(context, "atype");
    }

    @JRubyMethod(name="default")
    public IRubyObject default_value(ThreadContext context) {
        return getAttribute(context, "default");
    }

    /**
     * FIXME: will enumerations all be of the simple (val1|val2|val3)
     * type string?
     */
    @JRubyMethod
    public IRubyObject enumeration(ThreadContext context) {
        final String atype = ((Element) node).getAttribute("atype");

        if (atype != null && atype.length() != 0 && atype.charAt(0) == '(') {
            // removed enclosing parens
            String valueStr = atype.substring(1, atype.length() - 1);
            String[] values = valueStr.split("\\|");
            RubyArray enumVals = RubyArray.newArray(context.runtime, values.length);
            for (int i = 0; i < values.length; i++) {
                enumVals.append(context.runtime.newString(values[i]));
            }
            return enumVals;
        }

        return context.runtime.newEmptyArray();
    }

}