/**
 * Modified from https://github.com/mariocasciaro/object-path
 */
;(function(root) {

    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 });
    
    root.objectPath = mod;
}(this));