'use strict';
/* 
   command management - allow for non-ops to execute approved javascript code.
*/
var _commands = {};
var _cmdInterceptors = [];
/*
  execute a JSP command.
*/
var executeCmd = function(args, player){
    if (args.length === 0)
        throw new Error("Usage: jsp command-name command-parameters");
    var name = args[0];
    var cmd = _commands[name];
    if (typeof cmd === "undefined"){
        // it's not a global command - pass it on to interceptors
        var intercepted = false;
        for (var i = 0;i < _cmdInterceptors.length;i++){
            if (_cmdInterceptors[i](args,player))
                intercepted = true;
        }
        if (!intercepted)
            console.warn('Command %s is not recognised',name);
    }else{
        var result = null;
        try { 
            result = cmd.callback(args.slice(1),player);
        }catch (e){
            console.error("Error while trying to execute command: " + JSON.stringify(args));
            throw e;
        }
        return result;
    }
};
/*
  define a new JSP command.
*/
var defineCmd = function(name, func, options, intercepts) {
    if (typeof options == "undefined")
        options = [];
    _commands[name] = {callback: func, options: options};
    if (intercepts)
        _cmdInterceptors.push(func);
    return func;
};
var _command = function(name, func, options, intercepts) {
    return defineCmd(name, func, options, intercepts);
};
_command.exec = executeCmd;
exports.command = _command;
exports.commands = _commands;