/**
 * ----------------------------------------------------------------------
 * 
 *  A  S  I  M  A  X
 * 
 *      A X E Ls
 *      S I M P L E 
 *      A J A X
 *      H E L P E R
 * 
 * - requires jQuery
 * ----------------------------------------------------------------------
 * 
 * ----------------------------------------------------------------------
 */
var asimax = function () {

    // settings
    this.cfg = {
        apimethod: 'GET',
        apibase: false,
        taskparam: 'id',
        tasks:{
            /*
            'myDomId':{
                // part behind apibase
                apimore: '?',
                params: {
                    server: 'localhost'
                },
                // autoupdate each N sec; 0 = off
                interval: 10
            }
            */

        }
    };
    this.vars = {};
    this.intervalObjects = {};

    // ----------------------------------------------------------------------
    // SETTER
    // ----------------------------------------------------------------------

    /**
     * add a variable for query params in ajax call
     * it will be used if a params value in a task points to it
     * @param {string}  sName  name variable (=param variable too)
     * @param {string}  value  value
     */
    this.setVar = function (sName, value) {
        this.vars[sName]=value;
        return true;
    };
    // ----------------------------------------------------------------------
    // GETTER
    // ----------------------------------------------------------------------

    /**
     * get an array of all defined tasks ids
     */
    this.getTasks = function () {
        var aReturn=[];
        for (var sId in this.cfg.tasks){
            aReturn.push(sId);
        }
        return aReturn;
    };

    /**
     * get a value of a stored variable
     * @param {string}  sName  name variable (=param variable too)
     */
    this.getVar = function (sName) {
        try{
            if(this.vars[sName]){
                return this.vars[sName];
            };
        } catch(e){
            // nop
        }
        console.log('ERROR in getVar() - argument "'+sName+'" does not exist');
        return false;
    };
    /**
     * get all values of all stored variables
     */
    this.getVars = function () {
        return this.vars;
    };

    // ----------------------------------------------------------------------
    // ACTIONS
    // ----------------------------------------------------------------------

    this.updateAllTasks = function () {
        for (var sId in this.getTasks()){
            this.execTask(sId);
        }
    };

    /**
     * make an ajax-request and put response content into given div id
     * @param {string} id         id of the div to be filled
     * @returns {undefined}
     */
    this.execTask = function (id) {
        // clog("getPageItem('"+id+"', '"+sMoreData+"')");
        // $('#'+id).html('reading ...');
        /*
        if (!$('#' + id).hasClass('active')) {
            $('#errorlog').html('#' + id + ' is not active');
            return false;
        }
        */
       var oTask=this.cfg.tasks[id];
       if(!oTask){
           console.log('ERROR in execTask() - a task with the name "'+id+'" does not exist.');
           return false;
       }
       var domid=oTask.domid ? oTask.domid : id;
       var url=this.cfg.apibase+oTask.apimore;

        var queryparams=this.cfg.taskparam+'='+domid;
        if (this.cfg.tasks[id].params){
            var aParams=oTask.params;
            for (var i=0; i<aParams.length; i++){
                queryparams+='&'+aParams[i] + '=' + this.getVar(aParams[i]);
            }
        }

        $('#' + domid).css('opacity', '0.2');
        jQuery.ajax({
            url: url,
            data: queryparams,
            type: this.cfg.apimethod,
            success: function (data) {
                $('#' + domid).css('opacity', 1);
                $('#' + domid).html(data);
            },
            error: function (data) {
                $('#' + domid).css('opacity', 1);
                $('#' + domid).html('Failed :-/' + data);
                console.log(data);
                /*
                $('#errorlog').html(
                        $('#errorlog').html('AJAX error: <a href="' + url + '?' + queryparams + '">' + url + '?' + queryparams + '</a>')
                        );
                */                        
            }
        });

        /*
        $('#' + id).css('opacity', '0.2');

        sData = 'item=' + id + '&server=' + sSELECTEDSERVER + (sMoreData ? '&'+sMoreData : '');
        if(!bNoAdressbarUpdate){
            setAdressbar();
            iRefreshCounter=0;
        }
        jQuery.ajax({
            url: phpscript,
            data: sData,
            type: "GET",
            success: function (data) {
                $('#' + id).css('opacity', '1');
                $('#' + id).html(data);
            },
            error: function () {
                $('#' + id).css('opacity', false);
                $('#' + id).html('Failed :-/');
                $('#errorlog').html(
                        $('#errorlog').html('AJAX error: <a href="' + phpscript + '?' + sData + '">' + phpscript + '?' + sData + '</a>')
                        );
            }
        });
        */
    };

    this.init = function () {
        for (var sId in this.cfg.tasks){
            var oTask=this.cfg.tasks[i];

            if(this.intervalObjects[sId]){
                clearInterval(this.intervalObjects[sId]);
                this.intervalObjects[sId]=false;
            }

            if(oTask.interval){
                this.intervalObjects[sId]=window.setInterval(this.execTask(sId), oTask.interval);
            }
        }
    }

    // ----------------------------------------------------------------------
    // MAIN
    // ----------------------------------------------------------------------

    if(arguments[0]){
        this.cfg = realMerge(this.cfg, arguments[0]);
    };

    return true;

};

// --------------------------------------------------------------------------------
// FUNCTIONS
// --------------------------------------------------------------------------------

/**
 * merge 2 objects
 * @param  to    assoc array 1
 * @param  from  assoc array 2
 */
var realMerge = function (to, from) {
    for (n in from) {
        if (typeof to[n] !== 'object') {
            to[n] = from[n];
        } else if (typeof from[n] === 'object') {
            to[n] = realMerge(to[n], from[n]);
        }
    }

    return to;
};