/*!
*   ePaginater jQuery Plugin
*   V0.9.9
*   ethagnawl@gmail.com
*   http://ethagnawl.com/ePaginater
*   Copyright 2010, Pete Doherty
*   Date: 12/10/2010 21:19:34 (EST)
*
*   ePaginater is distributed under the terms of the GNU General Public License.
*
*   This program is free software: you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation, either version 3 of the License, or
*   (at your option) any later version.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*   GNU General Public License for more details.
*
*   http://www.gnu.org/licenses/gpl.txt
*
*   The pagination pattern was inspired by Mike West's 'Accessible Pagination Pattern'
*   http://mikewest.org/2010/02/an-accessible-pagination-pattern
*/

( function ($) {
    $.fn.ePaginater = function (options) {
        var config = {
            point_break: 160
        };
        if (options) {
            $.extend(config, options);
        }
        Array.prototype.jam = function jam() {
            return this.join(' ');
        };
        Object.prototype.chop = function chop () {
            return this.get(0).innerHTML.split(' ');
        };
        //  eBuilder - https://github.com/ethagnawl/eBuilder 
        function eBuilder(e,id,a,c,t,ch){var el=document.createElement(e);if(id){el.id=id;}if(a){for(var key in a){if(a.hasOwnProperty(key)){el.setAttribute([key],a[key]);}}}if(c){el.className=typeof c==='object'&&c.constructor===Array?c.join(' '):c;}if(t){el.appendChild(document.createTextNode(t));}if(ch){if(!ch.length){el.appendChild(ch);}else{for(var i=0;i<ch.length;i+=1){el.appendChild(ch[i]);}}}return el;}
        function insert_pag() {
            var $page = $(eBuilder(div, 'page_' + id));
            $.each(elems, function () {
                this.appendTo($page);    
            });
            $page.appendTo($wrapper);
            div_count += 1;
            id += 1;
            elems.length = 0;
        }
        function paginater_loop($that, i, el) {
            var this_length = $that.chop().length
                ,   pl_count = this_length + count
            ;
            inner = $that.chop();
            if (pl_count < config.point_break || pl_count === config.point_break) {
                elems[elems.length] = $that;
                count += this_length;
            } else {
                var slice_point = (this_length + count) - config.point_break
                    ,   new_el = inner.slice(config.point_break - count)
                ;
                $that.text(inner.slice(0, config.point_break - count).jam());
                elems[elems.length] = $that;
                insert_pag();
                count = new_el.length;
                if (count > config.point_break) {
                    while (new_el.length > config.point_break) {
                        var newer_el = new_el.splice(0, config.point_break).jam();
                        elems[elems.length] = $(eBuilder(el, 0, 0, 0, newer_el));
                        insert_pag();                        
                    }
                }
                elems[elems.length] = $(eBuilder(el, 0, 0, 0, new_el.jam()));
            }
        }
        function pag_click(that) {
            $(document.getElementById('page_'+that.split('_')[1])).addClass(on);
        }
        function scroll(direction) {
            $wrapper.find(on_class).removeClass(on);
            $(document.getElementById(direction)).addClass(on);
            pag_click(direction);
        }                    
        var back_button_text = '< previous'
            ,   button = 'button'
            ,   count = 0
            ,   directional = 'directional'
            ,   directional_class = '.' + directional                
            ,   div = 'div'
            ,   div_count = 0
            ,   $elem
            ,   elems = []
            ,   els = 'p'
            ,   forward_button_text = 'next >'
            ,   i
            ,   id = 0
            ,   inner = []
            ,   li = 'li'
            ,   lis = []
            ,   mouseover 
            ,   nav_id = 'ePaginater_nav'
            ,   $nav
            ,   off = 'off'
            ,   off_class = '.' + off
            ,   on = 'on'
            ,   on_class = '.' + on
            ,   over = 'over'
            ,   over_class = '.' + over                
            ,   page = 'page'
            ,   pag_prev =  'pag_prev'
            ,   pag_next = 'pag_next'
            ,   $wrapper = this
        ;
        if (this.chop().length > config.point_break) {
            $wrapper.children().each( function (i) {
                paginater_loop($(this), i, this.nodeName);
            });            
            if (div_count) {
                var $nav_ul = $(eBuilder('ul', nav_id, 0, 0, 0, [
                    eBuilder(li, 0, 0, 0, 0, 
                        eBuilder(button, pag_prev, 0, directional, back_button_text)
                    ), 
                    eBuilder(li, 0, 0, 0, 0, 
                        eBuilder(button, pag_next, 0, directional, forward_button_text)
                    )
                ]));
                for (i = 0; i < div_count; i += 1) {
                    $nav_ul.children().last().before($(eBuilder(li, 0, 0, 0, 0, 
                        eBuilder(button, 'dot_' + i, 0, 0, i + 1))).data(page, true)
                    );
                }
                $nav_ul.appendTo($wrapper);
                $nav = $(document.getElementById(nav_id));
            }
            $('#dot_0, #page_0').addClass(on);
            $nav.delegate(button, 'click', function () {
                var id = this.id
                    ,   scroll_back = $nav.find(on_class).parent().prev().data(page)
                    ,   scroll_fwd = $nav.find(on_class).parent().next().data(page)
                ;
                if (id === pag_prev && scroll_back) {
                    scroll($nav.find(on_class).parent().prev().find(button).attr('id'));
                    $nav.find(over_class).removeClass(over);
                    $nav.find(on_class).parent().prev(1).find(button).not(directional_class).addClass(over);
                    if ($nav.find(on_class).parent().index() === 1) {
                        $(document.getElementById(pag_prev)).addClass(off);
                    }
                } else if (id === pag_next && scroll_fwd) {
                    scroll($nav.find(on_class).parent().next().find(button).attr('id'));
                    $nav.find(over_class).removeClass(over);
                    $nav.find(on_class).parent().next(1).find(button).not(directional_class).addClass(over);
                    if ($nav.find(on_class).parent().next().is(':last-child')) {
                        $(document.getElementById(pag_next)).addClass(off);
                    }
                } else if ((id === pag_prev && !scroll_back) || (id === pag_next && !scroll_fwd)) {
                    $(this).addClass(off);
                    return false;
                } else {
                    $wrapper.find(on_class).removeClass(on);
                    $(document.getElementById(id)).addClass(on);
                    pag_click(id);
                }
            });
            $(directional_class).hover(
            function () {
                if ($(this).hasClass(directional)) {
                    mouseover = true;
                    $elem = $nav.find(on_class).parent();
                    if ((this.id === pag_prev && $elem.prev().data(page) === undefined) || (this.id === pag_next && $elem.next().data(page) === undefined)) {
                        $(this).addClass(off);
                    } else if (this.id === pag_prev) {
                        $nav.find(on_class).parent().prev().find(button).not(directional_class).addClass(over);
                    } else if (this.id === pag_next) {
                        $nav.find(on_class).parent().next().find(button).not(directional_class).addClass(over);
                    } else {
                    
                    }
                }
            },
            function () {
                if ($(this).hasClass(directional)) {
                    mouseover = false; 
                    $elem = $nav.find(on_class).parent();
                    if ((this.id === pag_prev && $elem.prev().data(page) === undefined) || (this.id === pag_next && $elem.next().data(page) === undefined)) {
                        $(this).removeClass(off);                    
                    } else {
                        $nav.find(over_class).removeClass(over);
                    }
                }
            });
/*
TODO:           
            $(window).keyup(function (e) {
                if (e.which === 37) {
//                    var scroll_back = $nav.find(on_class).parent().prev().data(page)
//                    scroll($nav.find(on_class).parent().prev().find(button).attr('id'));
                }
                if (e.which === 39) {
//                    var scroll_fwd = $nav.find(on_class).parent().next().data(page)
//                    scroll($nav.find(on_class).parent().next().find(button).attr('id'));
                }                
            });

*/
            if ($.fn.ellipsify) {
                $wrapper.find(div).not(':last').each(function () {
                    $(this).children().ellipsify({
                        count: config.point_break - 1
                    });
                });
            }
        }
        return this;
	};
})(jQuery);