(function () {
    "use strict";
    /*global extended isExtended*/

    function defineObject(extended, is, arr) {

        var deepEqual = is.deepEqual,
            isString = is.isString,
            isHash = is.isHash,
            difference = arr.difference,
            hasOwn = Object.prototype.hasOwnProperty,
            isFunction = is.isFunction;

        function _merge(target, source) {
            var name, s;
            for (name in source) {
                if (hasOwn.call(source, name)) {
                    s = source[name];
                    if (!(name in target) || (target[name] !== s)) {
                        target[name] = s;
                    }
                }
            }
            return target;
        }

        function _deepMerge(target, source) {
            var name, s, t;
            for (name in source) {
                if (hasOwn.call(source, name)) {
                    s = source[name];
                    t = target[name];
                    if (!deepEqual(t, s)) {
                        if (isHash(t) && isHash(s)) {
                            target[name] = _deepMerge(t, s);
                        } else if (isHash(s)) {
                            target[name] = _deepMerge({}, s);
                        } else {
                            target[name] = s;
                        }
                    }
                }
            }
            return target;
        }


        function merge(obj) {
            if (!obj) {
                obj = {};
            }
            for (var i = 1, l = arguments.length; i < l; i++) {
                _merge(obj, arguments[i]);
            }
            return obj; // Object
        }

        function deepMerge(obj) {
            if (!obj) {
                obj = {};
            }
            for (var i = 1, l = arguments.length; i < l; i++) {
                _deepMerge(obj, arguments[i]);
            }
            return obj; // Object
        }


        function extend(parent, child) {
            var proto = parent.prototype || parent;
            merge(proto, child);
            return parent;
        }

        function forEach(hash, iterator, scope) {
            if (!isHash(hash) || !isFunction(iterator)) {
                throw new TypeError();
            }
            var objKeys = keys(hash), key;
            for (var i = 0, len = objKeys.length; i < len; ++i) {
                key = objKeys[i];
                iterator.call(scope || hash, hash[key], key, hash);
            }
            return hash;
        }

        function filter(hash, iterator, scope) {
            if (!isHash(hash) || !isFunction(iterator)) {
                throw new TypeError();
            }
            var objKeys = keys(hash), key, value, ret = {};
            for (var i = 0, len = objKeys.length; i < len; ++i) {
                key = objKeys[i];
                value = hash[key];
                if (iterator.call(scope || hash, value, key, hash)) {
                    ret[key] = value;
                }
            }
            return ret;
        }

        function values(hash) {
            if (!isHash(hash)) {
                throw new TypeError();
            }
            var objKeys = keys(hash), ret = [];
            for (var i = 0, len = objKeys.length; i < len; ++i) {
                ret.push(hash[objKeys[i]]);
            }
            return ret;
        }


        function keys(hash) {
            if (!isHash(hash)) {
                throw new TypeError();
            }
            var ret = [];
            for (var i in hash) {
                if (hasOwn.call(hash, i)) {
                    ret.push(i);
                }
            }
            return ret;
        }

        function invert(hash) {
            if (!isHash(hash)) {
                throw new TypeError();
            }
            var objKeys = keys(hash), key, ret = {};
            for (var i = 0, len = objKeys.length; i < len; ++i) {
                key = objKeys[i];
                ret[hash[key]] = key;
            }
            return ret;
        }

        function toArray(hash) {
            if (!isHash(hash)) {
                throw new TypeError();
            }
            var objKeys = keys(hash), key, ret = [];
            for (var i = 0, len = objKeys.length; i < len; ++i) {
                key = objKeys[i];
                ret.push([key, hash[key]]);
            }
            return ret;
        }

        function omit(hash, omitted) {
            if (!isHash(hash)) {
                throw new TypeError();
            }
            if (isString(omitted)) {
                omitted = [omitted];
            }
            var objKeys = difference(keys(hash), omitted), key, ret = {};
            for (var i = 0, len = objKeys.length; i < len; ++i) {
                key = objKeys[i];
                ret[key] = hash[key];
            }
            return ret;
        }

        var hash = {
            forEach: forEach,
            filter: filter,
            invert: invert,
            values: values,
            toArray: toArray,
            keys: keys,
            omit: omit
        };


        var obj = {
            extend: extend,
            merge: merge,
            deepMerge: deepMerge,
            omit: omit
        };

        var ret = extended.define(is.isObject, obj).define(isHash, hash).define(is.isFunction, {extend: extend}).expose({hash: hash}).expose(obj);
        var orig = ret.extend;
        ret.extend = function __extend() {
            if (arguments.length === 1) {
                return orig.extend.apply(ret, arguments);
            } else {
                extend.apply(null, arguments);
            }
        };
        return ret;

    }

    if ("undefined" !== typeof exports) {
        if ("undefined" !== typeof module && module.exports) {
            module.exports = defineObject(require("extended"), require("is-extended"), require("array-extended"));

        }
    } else if ("function" === typeof define && define.amd) {
        define(["extended", "is-extended", "array-extended"], function (extended, is, array) {
            return defineObject(extended, is, array);
        });
    } else {
        this.objectExtended = defineObject(this.extended, this.isExtended, this.arrayExtended);
    }

}).call(this);