dojo.provide("dojo.lang.repr");

dojo.require("dojo.lang.common");
dojo.require("dojo.AdapterRegistry");
dojo.require("dojo.string.extras");

dojo.lang.reprRegistry = new dojo.AdapterRegistry();
dojo.lang.registerRepr = function(name, check, wrap, /*optional*/ override){
        /***
			Register a repr function.  repr functions should take
			one argument and return a string representation of it
			suitable for developers, primarily used when debugging.

			If override is given, it is used as the highest priority
			repr, otherwise it will be used as the lowest.
        ***/
        dojo.lang.reprRegistry.register(name, check, wrap, override);
    };

dojo.lang.repr = function(obj){
	/***
		Return a "programmer representation" for an object
	***/
	if(typeof(obj) == "undefined"){
		return "undefined";
	}else if(obj === null){
		return "null";
	}

	try{
		if(typeof(obj["__repr__"]) == 'function'){
			return obj["__repr__"]();
		}else if((typeof(obj["repr"]) == 'function')&&(obj.repr != arguments.callee)){
			return obj["repr"]();
		}
		return dojo.lang.reprRegistry.match(obj);
	}catch(e){
		if(typeof(obj.NAME) == 'string' && (
				obj.toString == Function.prototype.toString ||
				obj.toString == Object.prototype.toString
			)){
			return o.NAME;
		}
	}

	if(typeof(obj) == "function"){
		obj = (obj + "").replace(/^\s+/, "");
		var idx = obj.indexOf("{");
		if(idx != -1){
			obj = obj.substr(0, idx) + "{...}";
		}
	}
	return obj + "";
}

dojo.lang.reprArrayLike = function(arr){
	try{
		var na = dojo.lang.map(arr, dojo.lang.repr);
		return "[" + na.join(", ") + "]";
	}catch(e){ }
};

dojo.lang.reprString = function(str){ 
	dojo.deprecated("dojo.lang.reprNumber", "use `String(num)` instead", "0.4");
	return dojo.string.escapeString(str);
};

dojo.lang.reprNumber = function(num){
	dojo.deprecated("dojo.lang.reprNumber", "use `String(num)` instead", "0.4");
	return num + "";
};

(function(){
	var m = dojo.lang;
	m.registerRepr("arrayLike", m.isArrayLike, m.reprArrayLike);
	m.registerRepr("string", m.isString, m.reprString);
	m.registerRepr("numbers", m.isNumber, m.reprNumber);
	m.registerRepr("boolean", m.isBoolean, m.reprNumber);
	// m.registerRepr("numbers", m.typeMatcher("number", "boolean"), m.reprNumber);
})();
