package tigase.rest.pubsub

/*
 * Tigase HTTP API
 * Copyright (C) 2004-2013 "Tigase, Inc." <office@tigase.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. Look for COPYING file in the top folder.
 * If not, see http://www.gnu.org/licenses/.
 *
 * $Rev$
 * Last modified by $Author$
 * $Date$
 */
import tigase.http.rest.Service
import tigase.server.Command
import tigase.server.Iq
import tigase.server.Packet
import tigase.util.Base64
import tigase.xml.*
import tigase.xmpp.BareJID
import tigase.xmpp.JID
import tigase.xmpp.StanzaType

/**
 * Class implements generic support for PubSub ad-hoc commands
 */
class PubSubActionsHandler extends tigase.http.rest.Handler {

    def TIMEOUT = 30 * 1000;

    def COMMAND_XMLNS = "http://jabber.org/protocol/commands";
    def DATA_XMLNS = "jabber:x:data";
    def DISCO_ITEMS_XMLNS = "http://jabber.org/protocol/disco#items";

    public PubSubActionsHandler() {
        regex = /\/([^@\/]+)@([^@\/]+)\/([^\/]+)/
        isAsync = true
		decodeContent = false;

        execGet = { Service service, callback, localPart, domain, cmd ->
			execPost(service, callback, null, localPart, domain, cmd);            
        }

        execPost = { Service service, callback, content, localPart, domain, cmd ->
			
			content = decodeContent(content ? content.getReader().getText() : null);
			
            def compJid = BareJID.bareJIDInstance(localPart, domain);

            Element iq = new Element("iq");
            iq.setAttribute("to", "$localPart@$domain");
            iq.setAttribute("type", "set");
            iq.setAttribute("id", UUID.randomUUID().toString())

            Element command = new Element("command");
            command.setXMLNS(COMMAND_XMLNS);
            command.setAttribute("node", cmd);
            iq.addChild(command);

            if (content && content.getName() == "data") {
				Element data = (Element) content;
				
				def elemNames = (data.getChildren() ?: []).collect { it.getName() }
				
                Element x = new Element("x");
                x.setXMLNS(DATA_XMLNS);
                x.setAttribute("type", "submit");
                command.addChild(x);

				elemNames.each { var ->
					List<Element> children = data.getChildren().findAll({ it.getName() == var});
					if (children.isEmpty())
						return;
						
					if (children.size() == 1 && children.get(0).getAttribute("prefix")) {
						Element wrap = children.get(0);
						String prefix = wrap.getName();
						
						wrap.getChildren().each { sub ->
							Element fieldEl = new Element("field");
							fieldEl.setAttribute("var", prefix + "#" + sub.getName());
							x.addChild(fieldEl);
							
							def values = sub.getChildren()?.findAll({it.getName() == "value"});
							if (values) {
								values.each { value ->
									Element valueEl = new Element("value", value.getCData());
									fieldEl.addChild(valueEl);						
								}			
							}
							else {
								Element valueEl = new Element("value", sub.getCData());
								fieldEl.addChild(valueEl);														
							}
						}
						return;
					}
					
					Element fieldEl = new Element("field");
					fieldEl.setAttribute("var", var);
					x.addChild(fieldEl);
					
					
					
					List<Element> values = children.get(0).getChildren()?.findAll { it.getName() == "value" };
					if (values != null && !values.isEmpty()) {
						values.each { value ->
							Element valueEl = new Element("value", value.getCData());
							fieldEl.addChild(valueEl);						
						}					
					}
					else {
						def elems = children.get(0).getChildren();
						if (elems == null || elems.isEmpty()) {
							Element valueEl = new Element("value", children.get(0).getCData());
							fieldEl.addChild(valueEl);
						}
						else {
							elems.join("").split("\n").each { value ->
								Element valueEl = new Element("value", XMLUtils.escape(value));
								fieldEl.addChild(valueEl);													
							}
						}
					}
				}
				
            }

            service.sendPacket(new Iq(iq), TIMEOUT, { Packet result ->
				def error = result?.getElement().getChild("error");
                if (result == null || error != null) {
					String errorResult = error?.toString();
                    callback(errorResult);
                    return;
                }

                command = result.getElement().getChild("command", COMMAND_XMLNS);
                def data = command.getChild("x", DATA_XMLNS);
                def fieldElems = data.getChildren().findAll({ it.getName() == "field"});
                
				Element results = new Element("result");
				

                def titleEl = data.getChild("title");
                if (titleEl) {
					data.removeChild(titleEl);
					results.addChild(titleEl);
				}

                def instructionsEl = data.getChild("instructions");
                if (instructionsEl) {
					data.removeChild(instructionsEl);
					results.addChild(instructionsEl);
				}

                def noteEl = command.getChild("note");
                if (noteEl) {
					command.removeChild(noteEl);
					results.addChild(noteEl);
                }

                fieldElems.each { fieldEl ->
					def var = fieldEl.getAttribute("var");	
					def varTmp = var.split("#");					
					def elem = null;
					if (varTmp.length > 1) {
						elem = new Element(varTmp[1]);
						Element wrap = results.getChild(varTmp[0]);
						if (wrap == null) {
							wrap = new Element(varTmp[0]);
							wrap.setAttribute("prefix", "true");
							results.addChild(wrap);
						}
						wrap.addChild(elem);
					}
					else {
						elem = new Element(var);
						results.addChild(elem);
					}
						
						
					["label", "type"].each { attr ->
						if (fieldEl.getAttribute(attr)) {
							elem.setAttribute(attr, fieldEl.getAttribute(attr));
						}
					}

                    def valueElems = fieldEl.getChildren().findAll({ it.getName() == "value" });
					if (valueElems != null) {
						valueElems.each { val ->
							elem.addChild(new Element("value", val.getCData()));							
						}
					}

                    def optionElems = fieldEl.getChildren().findAll({ it.getName() == "option" });
                    if (!optionElems.isEmpty()) {
                        optionElems.each { optionEl ->
							Element option = new Element("option", optionEl.getChild("value").getCData());
							if (optionEl.getAttribute("label")) {
								option.setAttribute("label", optionEl.getAttribute("label"));
							}
							elem.addChild(option);
                        }
                    }
                }

                callback(results.toString())
            });
        }
    }
	
	Element decodeContent(String input) {
		if (!input) return null;
		
		def handler = new DomBuilderHandler();
		def parser = SingletonFactory.getParserInstance();			
		
		def data = ((String) input).toCharArray();
		
		parser.parse(handler, data, 0, data.length);
		
		return handler.getParsedElements().get(0);		
	}

}