(function (root, factory){
    'use strict';

    /*istanbul ignore next:cant test*/
    if (typeof module === 'object' && typeof module.exports === 'object') {
        module.exports = factory();
    } else if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define([], factory);
    } else {
        // Browser globals
        root.objectPath = factory();
    }
})(this, function(){
    'use strict';

    var toStr = Object.prototype.toString;
    function hasOwnProperty(obj, prop) {
        if(obj == null) {
            return false
        }
        //to handle objects with null prototypes (too edge case?)
        return Object.prototype.hasOwnProperty.call(obj, prop)
    }

    function isEmpty(value){
        if (!value) {
            return true;
        }
        if (isArray(value) && value.length === 0) {
            return true;
        } else if (typeof value !== 'string') {
            for (var i in value) {
                if (hasOwnProperty(value, i)) {
                    return false;
                }
            }
            return true;
        }
        return false;
    }

    function toString(type){
        return toStr.call(type);
    }

    function isObject(obj){
        return typeof obj === 'object' && toString(obj) === "[object Object]";
    }

    var isArray = Array.isArray || function(obj){
        /*istanbul ignore next:cant test*/
        return toStr.call(obj) === '[object Array]';
    }

    function isBoolean(obj){
        return typeof obj === 'boolean' || toString(obj) === '[object Boolean]';
    }

    function getKey(key){
        var intKey = parseInt(key);
        if (intKey.toString() === key) {
            return intKey;
        }
        return key;
    }

    function factory(options) {
        options = options || {}

        var objectPath = function(obj) {
            return Object.keys(objectPath).reduce(function(proxy, prop) {
                if(prop === 'create') {
                    return proxy;
                }

                /*istanbul ignore else*/
                if (typeof objectPath[prop] === 'function') {
                    proxy[prop] = objectPath[prop].bind(objectPath, obj);
                }

                return proxy;
            }, {});
        };

        function hasShallowProperty(obj, prop) {
            return (options.includeInheritedProps || (typeof prop === 'number' && Array.isArray(obj)) || hasOwnProperty(obj, prop))
        }

        function getShallowProperty(obj, prop) {
            if (hasShallowProperty(obj, prop)) {
                return obj[prop];
            }
        }

        function set(obj, path, value, doNotReplace){
            if (typeof path === 'number') {
                path = [path];
            }
            if (!path || path.length === 0) {
                return obj;
            }
            if (typeof path === 'string') {
                return set(obj, path.split('.').map(getKey), value, doNotReplace);
            }
            var currentPath = path[0];
            var currentValue = getShallowProperty(obj, currentPath);
            if (path.length === 1) {
                if (currentValue === void 0 || !doNotReplace) {
                    obj[currentPath] = value;
                }
                return currentValue;
            }

            if (currentValue === void 0) {
                //check if we assume an array
                if(typeof path[1] === 'number') {
                    obj[currentPath] = [];
                } else {
                    obj[currentPath] = {};
                }
            }

            return set(obj[currentPath], path.slice(1), value, doNotReplace);
        }

        objectPath.has = function (obj, path) {
            if (typeof path === 'number') {
                path = [path];
            } else if (typeof path === 'string') {
                path = path.split('.');
            }

            if (!path || path.length === 0) {
                return !!obj;
            }

            for (var i = 0; i < path.length; i++) {
                var j = getKey(path[i]);

                if((typeof j === 'number' && isArray(obj) && j < obj.length) ||
                    (options.includeInheritedProps ? (j in Object(obj)) : hasOwnProperty(obj, j))) {
                    obj = obj[j];
                } else {
                    return false;
                }
            }

            return true;
        };

        objectPath.ensureExists = function (obj, path, value){
            return set(obj, path, value, true);
        };

        objectPath.set = function (obj, path, value, doNotReplace){
            return set(obj, path, value, doNotReplace);
        };

        objectPath.insert = function (obj, path, value, at){
            var arr = objectPath.get(obj, path);
            at = ~~at;
            if (!isArray(arr)) {
                arr = [];
                objectPath.set(obj, path, arr);
            }
            arr.splice(at, 0, value);
        };

        objectPath.empty = function(obj, path) {
            if (isEmpty(path)) {
                return void 0;
            }
            if (obj == null) {
                return void 0;
            }

            var value, i;
            if (!(value = objectPath.get(obj, path))) {
                return void 0;
            }

            if (typeof value === 'string') {
                return objectPath.set(obj, path, '');
            } else if (isBoolean(value)) {
                return objectPath.set(obj, path, false);
            } else if (typeof value === 'number') {
                return objectPath.set(obj, path, 0);
            } else if (isArray(value)) {
                value.length = 0;
            } else if (isObject(value)) {
                for (i in value) {
                    if (hasShallowProperty(value, i)) {
                        delete value[i];
                    }
                }
            } else {
                return objectPath.set(obj, path, null);
            }
        };

        objectPath.push = function (obj, path /*, values */){
            var arr = objectPath.get(obj, path);
            if (!isArray(arr)) {
                arr = [];
                objectPath.set(obj, path, arr);
            }

            arr.push.apply(arr, Array.prototype.slice.call(arguments, 2));
        };

        objectPath.coalesce = function (obj, paths, defaultValue) {
            var value;

            for (var i = 0, len = paths.length; i < len; i++) {
                if ((value = objectPath.get(obj, paths[i])) !== void 0) {
                    return value;
                }
            }

            return defaultValue;
        };

        objectPath.get = function (obj, path, defaultValue){
            if (typeof path === 'number') {
                path = [path];
            }
            if (!path || path.length === 0) {
                return obj;
            }
            if (obj == null) {
                return defaultValue;
            }
            if (typeof path === 'string') {
                return objectPath.get(obj, path.split('.'), defaultValue);
            }

            var currentPath = getKey(path[0]);
            var nextObj = getShallowProperty(obj, currentPath)
            if (nextObj === void 0) {
                return defaultValue;
            }

            if (path.length === 1) {
                return nextObj;
            }

            return objectPath.get(obj[currentPath], path.slice(1), defaultValue);
        };

        objectPath.del = function del(obj, path) {
            if (typeof path === 'number') {
                path = [path];
            }

            if (obj == null) {
                return obj;
            }

            if (isEmpty(path)) {
                return obj;
            }
            if(typeof path === 'string') {
                return objectPath.del(obj, path.split('.'));
            }

            var currentPath = getKey(path[0]);
            if (!hasShallowProperty(obj, currentPath)) {
                return obj;
            }

            if(path.length === 1) {
                if (isArray(obj)) {
                    obj.splice(currentPath, 1);
                } else {
                    delete obj[currentPath];
                }
            } else {
                return objectPath.del(obj[currentPath], path.slice(1));
            }

            return obj;
        }

        return objectPath;
    }

    var mod = factory();
    mod.create = factory;
    mod.withInheritedProps = factory({includeInheritedProps: true})
    return mod;
});