/**
 * tablePagination - A table plugin for jQuery that creates pagination elements
 *
 * http://neoalchemy.org/tablePagination.html
 *
 * Copyright (c) 2009 Ryan Zielke (neoalchemy.com)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 *
 * @name tablePagination
 * @type jQuery
 * @param Object settings;
 *      firstArrow - Image - Pass in an image to replace default image. Default: (new Image()).src="./images/first.gif"
 *      prevArrow - Image - Pass in an image to replace default image. Default: (new Image()).src="./images/prev.gif"
 *      lastArrow - Image - Pass in an image to replace default image. Default: (new Image()).src="./images/last.gif"
 *      nextArrow - Image - Pass in an image to replace default image. Default: (new Image()).src="./images/next.gif"
 *      rowsPerPage - Number - used to determine the starting rows per page. Default: 5
 *      currPage - Number - This is to determine what the starting current page is. Default: 1
 *      optionsForRows - Array - This is to set the values on the rows per page. Default: [5,10,25,50,100]
 *      ignoreRows - Array - This is to specify which 'tr' rows to ignore. It is recommended that you have those rows be invisible as they will mess with page counts. Default: []
 *
 *
 * @author Ryan Zielke (neoalchemy.org)
 * @version 0.1.0
 * @requires jQuery v1.2.3 or above
 */

 (function($){

	$.fn.tablePagination = function(settings) {
		var defaults = {  
			firstArrow : (new Image()).src="./images/first.gif",  
			prevArrow : (new Image()).src="./images/prev.gif",
			lastArrow : (new Image()).src="./images/last.gif",
			nextArrow : (new Image()).src="./images/next.gif",
			rowsPerPage : 5,
			currPage : 1,
			optionsForRows : [5,10,25,50,100],
			ignoreRows : []
		};  
		settings = $.extend(defaults, settings);
		
		return this.each(function() {
      var table = $(this)[0];
      var totalPagesId = '#'+table.id+'+#tablePagination #tablePagination_totalPages';
      var currPageId = '#'+table.id+'+#tablePagination #tablePagination_currPage';
      var rowsPerPageId = '#'+table.id+'+#tablePagination #tablePagination_rowsPerPage';
      var firstPageId = '#'+table.id+'+#tablePagination #tablePagination_firstPage';
      var prevPageId = '#'+table.id+'+#tablePagination #tablePagination_prevPage';
      var nextPageId = '#'+table.id+'+#tablePagination #tablePagination_nextPage';
      var lastPageId = '#'+table.id+'+#tablePagination #tablePagination_lastPage';
      
      var possibleTableRows = $.makeArray($('tbody tr', table));
      var tableRows = $.grep(possibleTableRows, function(value, index) {
        return ($.inArray(value, defaults.ignoreRows) == -1);
      }, false)
      
      var numRows = tableRows.length
      var totalPages = resetTotalPages();
      var currPageNumber = (defaults.currPage > totalPages) ? 1 : defaults.currPage;
      if ($.inArray(defaults.rowsPerPage, defaults.optionsForRows) == -1)
        defaults.optionsForRows.push(defaults.rowsPerPage);
      
      
      function hideOtherPages(pageNum) {
        if (pageNum==0 || pageNum > totalPages)
          return;
        var startIndex = (pageNum - 1) * defaults.rowsPerPage;
        var endIndex = (startIndex + defaults.rowsPerPage - 1);
        $(tableRows).show();
        for (var i=0;i<tableRows.length;i++) {
          if (i < startIndex || i > endIndex) {
            $(tableRows[i]).hide()
          }
        }
      }
      
      function resetTotalPages() {
        var preTotalPages = Math.round(numRows / defaults.rowsPerPage);
        var totalPages = (preTotalPages * defaults.rowsPerPage < numRows) ? preTotalPages + 1 : preTotalPages;
        if ($(totalPagesId).length > 0)
          $(totalPagesId).html(totalPages);
        return totalPages;
      }
      
      function resetCurrentPage(currPageNum) {
	  	if(currPageNum==1){
			$('#tablePagination_prevPage').addClass('ocult');
		} else
		{
			$('#tablePagination_prevPage').removeClass('ocult');
		}
		if(currPageNum==totalPages){
			$('#tablePagination_nextPage').addClass('ocult');
		}else{
			$('#tablePagination_nextPage').removeClass('ocult');
		}
		$('.numPagina#id'+currPageNum).addClass("actual");
		$('.numPagina:not(#id'+currPageNum+')').removeClass("actual");
		
        if (currPageNum < 1 || currPageNum > totalPages)
          return;
        currPageNumber = currPageNum;
        hideOtherPages(currPageNumber);
        $(currPageId).val(currPageNumber)
		
      }
      
      function createPaginationElements() {
        var htmlBuffer = [];
        htmlBuffer.push("<div id='tablePagination'>");
        htmlBuffer.push("<span id='tablePagination_paginater'>");
         htmlBuffer.push("<img id='tablePagination_prevPage' class='ocult' src='"+defaults.prevArrow+"'>");
		 htmlBuffer.push("<div id='numsPagina'>");
		 for(i=1;i<=totalPages;i++)
		 {
		 	if (i == 1) {
				htmlBuffer.push("<a class='numPagina actual' id=id" + i + ">" + i + "</a>");
			} else {
				htmlBuffer.push(" |<a class='numPagina' id=id" + i + "> " + i + "</a>");
			}
		 }
		 htmlBuffer.push("</div>");
        htmlBuffer.push("<img id='tablePagination_nextPage' src='"+defaults.nextArrow+"'>");
        htmlBuffer.push("</span>");
        htmlBuffer.push("</div>");
        return htmlBuffer.join("").toString();
      }
      
      if ($(totalPagesId).length == 0) {
        $(this).after(createPaginationElements());
      }
      else {
        $('#tablePagination_currPage').val(currPageNumber);
      }
      hideOtherPages(currPageNumber);
      
	  $('.numPagina').click(function(){
	  	var num=this.id.replace("id", "");
	  	resetCurrentPage(num);
	  })
      $(firstPageId).bind('click', function (e) {
        resetCurrentPage(1)
      });
      
      $(prevPageId).bind('click', function (e) {
        resetCurrentPage(currPageNumber - 1)
      });
      
      $(nextPageId).bind('click', function (e) {
        resetCurrentPage(currPageNumber + 1)
      });
      
      $(lastPageId).bind('click', function (e) {
        resetCurrentPage(totalPages)
      });
      
      $(currPageId).bind('change', function (e) {
        resetCurrentPage(this.value)
      });
      
      $(rowsPerPageId).bind('change', function (e) {
        defaults.rowsPerPage = parseInt(this.value, 10);
        totalPages = resetTotalPages();
        resetCurrentPage(1)
      });
      
		})
	};		
})(jQuery);