/**
 * @requires _ Underscore.js
 */
(function (window) {

    window._ = window._ || {};

    var StringProto = String.prototype;

    var nativeTrim = StringProto.trim,
        nativeTrimLeft = StringProto.trimLeft,
        nativeTrimRight = StringProto.trimRight;

    var getTrimRegExp = function (chars, left, right) {
        chars = chars ? '' + chars : '';
        chars = (chars)
            ? '[' + chars.replace(/([-^$.+*?|(){}[\]\/\\])/g, '\\$1') + ']'
            : '\\s';

        var parts = [];
        if (left) {
            parts.push('^' + chars + '+');
        }
        if (right) {
            parts.push(chars + '+$');
        }
        return new RegExp(parts.join('|'), 'g');
    };

    _.obj = {
        /**
         * Get property specified by complex name from Object or Array
         * @param {Object|Array} source Source data
         * @param {String} field Parts of complex names should be separated with dot
         * @param {*} [defaultValue]
         * @return {*|undefined}
         */
        get: function (source, field, defaultValue) {
            var data = source;
            var path = ('' + field).split('.');
            for (var i = 0, count = path.length; i < count && null != data; ++i) {
                data = data[path[i]];
            }
            return (undefined === data) ? defaultValue : data;
        },

        /**
         * Set property specified by complex name in Object or Array
         * @param {Object|Array} target
         * @param {String} field Parts of complex names should be separated with dot
         * @param {*} value
         * @return {Boolean}
         */
        set: function (target, field, value) {
            var isObject = function (obj) {
                var type = Object.prototype.toString.call(obj);
                return ('[object Object]' === type || '[object Array]' === type);
            };
            if (isObject(target)) {
                var data = target;
                var path = ('' + field).split('.');
                for (var i = 0, count = path.length - 1; i < count; ++i) {
                    if ('undefined' === typeof data[path[i]]) {
                        data[path[i]] = {};
                    }
                    if (isObject(data[path[i]])) {
                        data = data[path[i]];
                    } else {
                        return false;
                    }
                }
                data[path[path.length - 1]] = value;
                return true;
            }
            return false;
        }
    };

    _.str = {
        toNumber: function (text) {
            var number = +text;
            return isFinite(number) ? number : 0;
        },

        /**
         * @param {String} str
         * @param {String} [chars]
         * @return {String}
         */
        trim: function (str, chars) {
            str = '' + str;
            return (nativeTrim && !chars)
                ? nativeTrim.call(str)
                : (str == null ? '' : str.replace(getTrimRegExp(chars, true, true), ''));
        },

        /**
         * @param {String} str
         * @param {String} [chars]
         * @return {String}
         */
        trimLeft: function (str, chars) {
            str = '' + str;
            return (nativeTrimLeft && !chars)
                ? nativeTrimLeft.call(str)
                : (str == null ? '' : str.replace(getTrimRegExp(chars, true, false), ''));
        },

        /**
         * @param {String} str
         * @param {String} [chars]
         * @return {String}
         */
        trimRight: function (str, chars) {
            str = '' + str;
            return (nativeTrimRight && !chars)
                ? nativeTrimRight.call(str)
                : (str == null ? '' : str.replace(getTrimRegExp(chars, false, true), ''));
        },

        /**
         * Converts string's first character to uppercase
         * @param {String} str
         * @return {String}
         */
        capitalize: function (str) {
            str = '' + str;
            return str.charAt(0).toUpperCase() + str.substr(1);
        },

        /**
         * Converts underscored or dasherized string to camelized
         * @example
         * <code>
         *     _.str.camelize('-moz-box-shadow')
         *     // MozBoxShadow
         * </code>
         * @param {String} str
         * @return {String}
         */
        camelize: function(str) {
            return _.str.trim(str).replace(/[-_\s]+(.)?/g, function(match, c) {
                return c ? c.toUpperCase() : '';
            });
        },

        /**
         *
         * @param {String} str
         * @param {Number} count
         * @param {String} [separator]
         * @return {String}
         */
        repeat: function (str, count, separator) {
            str = '' + str;
            count = +count;
            separator = separator ? '' + separator : '';
            var result = '';
            for (var i = 0; i < count; ++i) {
                if (i) {
                    result += separator;
                }
                result += str;
            }
            return result;
        },

        /**
         * Renders simple templates
         * @example
         * <code>
         *     _.str.tpl('Hello {name}', {name: 'World'});
         * </code>
         * @param {String} tpl
         * @param {Object} data
         * @return {String}
         */
        tpl: function (tpl, data) {
            return ('' + tpl).replace(/\{([\w\d_-]+)\}/g, function (match, key) {
                return (key in data) ? data[key] : '';
            });
        },

        /**
         * Returns a word in the plural
         * @param {Array|String} word
         * @param {Number} count
         * @return {String}
         */
        plural: function (word, count) {
            count = +count;
            var result = '';
            if (_.isArray(word)) {
                result = (0 === count || 1 < count)
                    ? word[1] || ''
                    : word[0];
            } else if (_.isString(word)) {
                result = word + (0 === count || 1 < count ? 's' : '');
            }
            return result;
        }
    };

    _.num = {
        /**
         * Returns formatted number
         *
         * http://phpjs.org/functions/number_format:481
         * Copyright 2011, Kevin van Zonneveld
         * Released under the MIT and GPL licenses.
         * More information: http://phpjs.org/pages/license
         *
         * @param {Number|String} number
         * @param {Number} [decimals] Default '0'
         * @param {String} [decPoint] Default '.'
         * @param {String} [thousandsSep] Default ','
         * @return {String}
         */
        format: function (number, decimals, decPoint, thousandsSep) {
            number = (number + '').replace(/[^0-9+\-Ee.]/g, '');
            var n = !isFinite(+number) ? 0 : +number,
                prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
                sep = (typeof thousandsSep === 'undefined') ? ',' : thousandsSep,
                dec = (typeof decPoint === 'undefined') ? '.' : decPoint,
                s,
                toFixedFix = function (n, prec) {
                    var k = Math.pow(10, prec);
                    return '' + Math.round(n * k) / k;
                };
            // Fix for IE parseFloat(0.55).toFixed(0) = 0;
            s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
            if (s[0].length > 3) {
                s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep);
            }
            if ((s[1] || '').length < prec) {
                s[1] = s[1] || '';
                s[1] += new Array(prec - s[1].length + 1).join('0');
            }
            return s.join(dec);
        }
    };

    /**
     *
     * @param {String} url
     * @param {String} [baseUrl]
     * @return {_.Uri}
     */
    _.Uri = function (url, baseUrl) { return this.initialize.apply(this, arguments); };
    _.Uri.prototype = {
        initialize: function (url, baseUrl) {
            url = '' + url;
            /**
             * @readonly
             * @type {Object}
             */
            this.parts = this.parse(url);
            var fields = {'source': '', 'protocol': '', 'user': '', 'password': '', 'host': '', 'port': '',
                'path': '', 'query': '', 'anchor': ''};
            for (var name in fields) {
                if (fields.hasOwnProperty(name)) {
                    this[name] = this.parts[name] || '';
                }
            }

            if (baseUrl) {
                this.setBaseUrl(baseUrl);
            }

            return this;
        },

        setBaseUrl: function (baseUrl) {
            baseUrl = '' + baseUrl;
            baseUrl = _.str.trimRight(baseUrl, '/');
            var baseParts = this.parse(baseUrl);
            if (this.host) {
                if (-1 !== baseUrl.indexOf(this.host)) {
                    if (this.host === baseParts.host
                        && baseParts.path === this.path.substring(0, baseParts.path.length)
                    ) {
                        this.baseUrl = baseUrl;
                        this.basePath = baseParts.path;
                        this.relativePath = this.path.substring(baseParts.path.length);
                    }
                }
                this.rebuild();
            } else if ('/' !== this.path[0]) {
                this.baseUrl = baseUrl;
                this.basePath = baseParts.path;
                this.relativePath = '/' + this.path;
                var baseFields = ['protocol', 'user', 'password', 'host', 'port', 'path'];
                for (var i = 0, length = baseFields.length; i < length; ++i) {
                    this[baseFields[i]] = baseParts[baseFields[i]];
                }
                this.path = this.path + this.relativePath;
                this.rebuild();
            }

            return this;
        },

        /**
         * Returns path without '..' and '.'.
         * Works only with path, not entire url
         * @param {String} path
         * @return {String}
         */
        realPath: function (path) {
            path = '' + path;
            if ((/(^|\/)\.\.?(\/|$)/).test(path)) {
                var result = [], parts = path.split('/');
                for (var i = 0, len = parts.length; i < len; ++i) {
                    if ('..' === parts[i]) {
                        result.pop();
                    } else if ('.' !== parts[i]) {
                        result.push(parts[i]);
                    }
                }
                path =  result.join('/');
            }
            return path;
        },

        /**
         * Returns object containing parts of parsed url
         *
         * Modified version of parseUri 1.2.2
         * http://blog.stevenlevithan.com/archives/parseuri
         * Copyright 2007, Steven Levithan <stevenlevithan.com>
         * MIT License
         *
         * @param {String} url
         * @return {Object}
         */
        parse: function (url) {
            url = '' + url;
            var o = _.Uri.prototype.parserOptions,
                m = o.parser[o.strictMode ? "strict" : "loose"].exec(url),
                uri = {},
                i = 14;

            while (i--) {
                uri[o.key[i]] = m[i] || "";
            }

            uri[o.q.name] = {};
            uri[o.key[12]].replace(o.q.parser, function ($0, $1, $2) {
                if ($1) {
                    uri[o.q.name][$1] = $2;
                }
            });

            return uri;
        },
        parserOptions: {
            strictMode: true,
            key: ["source","protocol","authority","userInfo","user","password","host","port","relative","path","directory","file","query","anchor"],
            q: {
                name:   "queryKey",
                parser: /(?:^|&)([^&=]*)=?([^&]*)/g
            },
            parser: {
                strict: /^(?:([^:\/?#]+):)?(?:\/\/((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?))?((((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/,
                loose:  /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/
            }
        },

        rebuild: function () {
            this.source = this.toString();
            return this.source;
        },

        toString: function () {
            var url = '';
            if (this.protocol) {
                url += this.protocol;
                if (':' !== this.protocol[this.protocol.length - 1]) {
                    url += ':';
                }
                url += '//';
            } else {
                if (-1 !== this.source.indexOf('//') && this.host) {
                    url += '//';
                }
            }

            if (this.host && (this.user || this.password)) {
                url += this.user + (this.password ? ':' + this.password : '') + '@';
            }

            if (this.host) {
                url += this.host;
                if (this.port) {
                    url += ':' + this.port;
                }
            }

            if (this.path) {
                url += this.path;
            } else {
                if (this.host && (this.query || this.anchor)) {
                    url += '/';
                }
            }
            if (this.query) {
                if (0 !== this.query.indexOf('?')) {
                    url += '?';
                }
                url += this.query;
            }

            if (this.anchor) {
                if (0 !== this.anchor.indexOf('#')) {
                    url += '#';
                }
                url += this.anchor;
            }

            return url;
        }
    };


    /**
     * Returns type of variable in original case
     * @param {*} mixed
     * @param {Boolean} [lowerCase]
     * @return {String}
     */
    window._.getType = function (mixed, lowerCase) {
        var type = (null === mixed || undefined === mixed)
            ? '' + mixed
            : Object.prototype.toString.call(mixed).slice(8, -1);
        return (lowerCase) ? type.toLowerCase() : type;
    };

})(window);