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

Autocompleter.Request = new Class({

    Extends: Autocompleter,

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

    },

    query: function(){
        var data = Object.clone(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]);
    }

});

Autocompleter.Request.JSON = new Class({

    Extends: Autocompleter.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);
    }

});

Autocompleter.Request.HTML = new Class({

    Extends: Autocompleter.Request,

    initialize: function(el, url, options) {
        this.parent(el, options);
        this.request = new Request.HTML(Object.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 */

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