/*!
 * Copyright (c) 2010, Aino - http://aino.se/
 * Usage: $('a:path').addClass('active');
 */
(function($){
    var path = {

        // array of files to ignore
        ignoreFiles : ['index.htm','index.html','index.shtml','index.cgi','index.php'],

        // strict mode boolean
        strictQuery : true,

        // regexp for ignored file names
        ignore : function() {
            return new RegExp('('+this.ignoreFiles.join('|')+')','i');
        },

        // grab and parse the location
        window : function() {

            // define window.location as a short variable
            var _l = window.location;

            // grab the window path, split & and parse
            var _w = _l.href.cleanPath(this.ignore()).split('/');

            // grab the query string, split & sort if not in strict mode
            var _q = _l.search.substring(1).length > 0 ? _l.search.substring(1).split('&') : [];
            if (!this.strictQuery) { _q.sort(); }

            // merge the arrays
            return _w.concat(_q);
        },

        // grab and parse the anchor
        anchor : function(_this) {

            // grab the hrefs
            var _org = _this.getAttribute('href',1);

            // return false if node is not anchor or href is not present
            if (!_org || _this.nodeName != 'A') { return false; }

            var _l = window.location;

            // parse href
            var _href = _org.absUrl().cleanPath(this.ignore());

            // return if href is root
            if (_href === (_l.protocol + '//' + _l.hostname).replace(/www\./,'').noSlash()) {
                return false;
            }

            // split href into path & query
            var _s = _href.split("?");
            var _a = _s[0].noSlash().split('/');
            var _q = _s.length > 1 ? _s[1].split('&') : [];

            // sort query if not in strict mode
            if (!this.strictQuery) { _q.sort(); }

            // merge the arrays
            return _a.concat(_q);

        },

        compareArray : function(o,t) {
            if (o.length != t.length) { return false; }
            for (var i = 0; i < t.length; i++) {
                if (o[i] !== t[i]) {
                    return false;
                }
            }
            return true;
        },

        // match the anchor with window
        match : function(_this) {
            if ($(_this).attr('href') == '#') {
                return false;
            }

            var _a = this.anchor(_this);
            var _w = this.window();

            // check if root
            if(_this.pathname.split('/').length < 3) {
                return this.compareArray(_w,_a);
            }
            // compare and return
            return (_w.length < _a.length) ? false : this.compareArray(_w.slice(0,_a.length),_a);

        },

        current : function(_this) {
            if ($(_this).attr('href') == '#') {
                return false;
            }

            var _a = this.anchor(_this);
            var _w = this.window();

            // compare and return
            //console.log(_this,_w,_a,this.compareArray(_w,_a))
            return this.compareArray(_w,_a);
        }
    };


    // Extend jQuery with the :path selector
    $.extend($.expr[":"], { path : function(a) { return path.match(a); } } );

    // Extend jQuery with the :current selector
    $.extend($.expr[":"], { current : function(a) { return path.current(a); } } );

    String.prototype.noSlash = function() {
        return this.lastIndexOf('/') === this.length-1 || this.lastIndexOf('#') === this.length-1 ? this.substr(0,this.length-1) : this.toString();
    };


    String.prototype.absUrl = function() {
        var l = window.location, h, p, f, i;
        if (/^\w+:/.test(this)) {
            return this.toString();
        }
        h = l.protocol + '//' + l.host;
        if (this.indexOf('/') === 0) {
            return h + this.toString();
        }
        p = l.pathname.replace(/\/[^\/]*$/, '');
        f = this.match(/\.\.\//g);
        if (f) {
            var n = this.substring(f.length * 3);
            for (i = f.length; i--;) {
                p = p.substring(0, p.lastIndexOf('/'));
            }
        } else {
            n = this.toString();
        }
        return h + p + '/' + n;
    };

    String.prototype.cleanPath = function(ignore) {
        return this.replace(/www\./i,'').replace(ignore,'').replace(/\.\//,'').noSlash().toString();
    };
})(jQuery);