/**
 * Print handler class
 *
 * @author Mandarin Drummond
 */
RP.Printer = Class.create(); 
RP.Printer.setDeviceId = function(devId) {

    //document.printerDeviceId = devId;
    RP.Util.setGlobal('printerDeviceId', devId);
}
RP.Printer.getDeviceId = function() {
    //putting this in the document ns for now, want to clean this up for later..
    return RP.Util.getGlobal('printerDeviceId');
}
/**
 * Returns the printer instance, which is intended to be a singleton.
 *
 * @returns RP.Printer
 */
RP.Printer.getHandle = function() {

    //hardcoding the variable name for now...
    if (RP.Util.getGlobal('printHandler') == undefined) {

        RP.Util.setGlobal('printHandler', new RP.Printer());
        //document.ci_printer = new RP.Printer();       
    }
    return RP.Util.getGlobal('printHandler');
}

RP.Printer.prototype = {

    /**
     * Class constructor
     *
     * @param string printIFrame element to use to invoke the print URL (see this._print)
     * @return NULL
     */
    initialize: function() {
    
        /**
         * @todo set default failure/error callback and default
         * timeout callback.
         */
                
    },
    
    /**
     * Starts the printing process
     *
     * @return NULL
     */
    start: function(devId, cpnIds, callBack) {
        this._devId    = devId;
        this._cpnIds   = cpnIds;
        this._callBack = callBack;
        //this function triggers the sequence...
        this._setToken(RP.Printer.getHandle()._cpnIds);
    },
    /**
     * Set the print token
     *
     * @param array cpnIds array of coupons Ids
     * @return Boolean
     */
    _setToken: function(cpnIds) {
        var printstr = cpnIds.join(",");
        var prox     = RP.Util.WebService.Factory("PrintService");
        //get print token
        prox.GetPrintToken(printstr, this._devId, RP.Printer.getHandle()._handleTokenResponse);
    },
    
    /**
     * Handles the token response...passes along to the print method
     *
     * @param TokenWithMsg resp
     * @return NULL
     */
    _handleTokenResponse: function(resp) {

        //alert(resp.PrintCartToken);
        var token = resp.PrintCartToken;
        
        /**
         * @todo check for resp.ErrorCoupons and
         * throw appropriate exception (or display message) if some
         * are found.
         */
         
        if (resp.Status == "Failed.") {
            var ex = new $RP$EX("Failed to print: " + resp.Message + ".");
            ex.alert();
            return;
        }
        if (resp.ErrorCoupons &&
            resp.ErrorCoupons.size()) {
            RP.Printer.getHandle()._errorCoupons = resp.ErrorCoupons;
            if (RP.Printer.getHandle()._cpnIds.size() == resp.ErrorCoupons.size()) {
                RP.Printer.getHandle()._token = token;
            }
        }
        RP.Printer.getHandle()._token = token;
        RP.Printer.getHandle()._callBack();
        
    },
    
    /**
     * Return any errors available after calling start();
     *
     */
    getErrors : function() {
        return RP.Printer.getHandle()._errorCoupons;
    },
    
    /**
     * Checks to see if any valid coupons are available for printing
     *
     */
    hasValidCoupons : function() {
    
        if (!this._token) {
            return false;
        }
        if (!this._errorCoupons || (this._errorCoupons && (this._cpnIds.size() > this._errorCoupons.size()))) {
            return true;
        }
        return false;
    },

    /**
     * print the stuff.. call this after start(); and only if hasValidCoupons returns true
     */    
    print : function() {
        if (!this._token) {
            throw new $RP$EX('No print token available.');
        }
    
        var prox     = RP.Util.WebService.Factory("PrintService");
        prox.set_defaultSucceededCallback(RP.Printer.getHandle()._redirect);
        prox.GetPrintUrl(this._token);
    
    },
    
    /**
     * Sends the request to the printer
     *
     * @param string url URL of the printmanager @coupons inc.
     * @return null
     */
    _redirect: function(url) {      
        //if no errors, send along to PrintManager.aspx @ coupons.com
        $('printWindow').src = url;
    }

};