/**
 * Autocompleter2.Request
 *
 * http://digitarald.de/project/Autocompleter2/
 *
 * @version                1.1.2
 *
 * @license                MIT-style license
 * @author                Harald Kirschner <mail [at] digitarald.de>
 * @copyright        Author
 */

Autocompleter2.Request = new Class({

        Extends: Autocompleter2,

        options: {/*
                indicator: null,
                indicatorClass: null,
                onRequest: $empty,
                onComplete: $empty,*/
                postData: {},
                ajaxOptions: {},
                postVar: 'value'

        },

        query: function(){
                var data = $unlink(this.options.postData) || {};
                data[this.options.postVar] = this.queryValue;
                var indicator = $(this.options.indicator);
                if (indicator) indicator.setStyle('display', '');
                var cls = this.options.indicatorClass;
                if (cls) this.element.addClass(cls);
                this.fireEvent('onRequest', [this.element, this.request, data, this.queryValue]);
                this.request.send({'data': data});
        },

        /**
         * queryResponse - abstract
         *
         * Inherated classes have to extend this function and use this.parent()
         */
        queryResponse: function() {
                var indicator = $(this.options.indicator);
                if (indicator) indicator.setStyle('display', 'none');
                var cls = this.options.indicatorClass;
                if (cls) this.element.removeClass(cls);
                return this.fireEvent('onComplete', [this.element, this.request]);
        }

});

Autocompleter2.Request.JSON = new Class({

        Extends: Autocompleter2.Request,

        initialize: function(el, url, options) {
                this.parent(el, options);
                this.request = new Request.JSON($merge({
                        'url': url,
                        'link': 'cancel'
                }, this.options.ajaxOptions)).addEvent('onComplete', this.queryResponse.bind(this));
        },

        queryResponse: function(response) {
                this.parent();
                this.update(response);
        }

});

Autocompleter2.Request.HTML = new Class({

        Extends: Autocompleter2.Request,

        initialize: function(el, url, options) {
                this.parent(el, options);
                this.request = new Request.HTML($merge({
                        'url': url,
                        'link': 'cancel',
                        'update': this.choices
                }, this.options.ajaxOptions)).addEvent('onComplete', this.queryResponse.bind(this));
        },

        queryResponse: function(tree, elements) {
                this.parent();
                if (!elements || !elements.length) {
                        this.hideChoices();
                } else {
                        this.choices.getChildren(this.options.choicesMatch).each(this.options.injectChoice || function(choice) {
                                var value = choice.innerHTML;
                                choice.inputValue = value;
                                this.addChoiceEvents(choice.set('html', this.markQueryValue(value)));
                        }, this);
                        this.showChoices();
                }

        }

});

/* compatibility */

Autocompleter2.Ajax = {
        Base: Autocompleter2.Request,
        Json: Autocompleter2.Request.JSON,
        Xhtml: Autocompleter2.Request.HTML
};