/* 
*page plugin 1.0   2016-09-29 by cary
*/
(function ($) {
  //濮掓稒枪椤撳宕ｉ崒娑欐
  var defaults = {
    totalPages: 9,//闁诡剙顭烽妴澶愬极閿燂拷
    liNums: 9,//闁告帒妫濋妴澶愭儍閸曨剚娈堕悗娑欘殕鐎垫粓鏌﹂鑺ユ(鐎点倝缂氶鍛村矗閺嵮屾疄闁轰緤鎷?
    activeClass: 'active' ,//active缂侇偓鎷
    firstPage: '',//濡絾鐗犻妴澶愬箰婢舵劖灏﹂柛姘Ф琚
    lastPage: '',//闁哄牜鍋婇妴澶愬箰婢舵劖灏﹂柛姘Ф琚
    prv: '',//闁告挸绉崇粩瀛樸亜閸偄鐦婚梺绛嬪枛閹洜绮旈敓锟
    next: '',//闁告艾绨肩粩瀛樸亜閸偄鐦婚梺绛嬪枛閹洜绮旈敓锟
    hasFirstPage: true,//闁哄嫷鍨伴幆渚€寮垫径鎰垫禃濡炪倕鐏氱€垫粓鏌﹂敓锟
    hasLastPage: true,//闁哄嫷鍨伴幆渚€寮垫径瀣睘濡炪倕鐏氱€垫粓鏌﹂敓锟
    hasPrv: true,//闁哄嫷鍨伴幆渚€寮垫径濠傤枀濞戞挴鍋撳銈呯仛鐎垫粓鏌﹂敓锟
    hasNext: true,//闁哄嫷鍨伴幆渚€寮垫径濠冨€靛☉鎾亾濡炪倕鐏氱€垫粓鏌﹂敓锟
    callBack : function(page){
        //闁搞儳鍋炵敮鈧柨娑橆唹age闂侇偄顦懙鎴炪亜閸偅娈
    }
  };

  //闁圭粯甯婂▎銏ゅ触瀹ュ泦锟
  $.fn.Page = function (options) {
    //閻熸洖妫涘ú濠冾渶濡鍚囬柛娆忓€归弳锟
    var opts = $.extend(defaults, options);
    //濞戞捁顕ч崵閬嶅极閿燂拷
    return this.each(function () {
      var obj = $(this);
      var l = opts.totalPages;
      var n = opts.liNums;
      var active = opts.activeClass;
      var str = '';
      var str1 = '<li><a href="javascript:" class="'+ active +'">1</a></li>';
      if (l > 1&&l < n+1) {
        for (i = 2; i < l + 1; i++) {
          str += '<li><a href="javascript:">' + i + '</a></li>';
        }
      }else if(l > n){
        for (i = 2; i < n + 1; i++) {
          str += '<li><a href="javascript:">' + i + '</a></li>';
        }
      }
      var dataHtml = '';
      if(opts.hasNext){
          dataHtml += '<div class="next fr">' + opts.next + '</div>';
      }
      if(opts.hasLastPage){
          dataHtml += '<div class="last fr">' + opts.lastPage + '</div>';
      }
          dataHtml += '<ul class="pagingUl">' + str1 + str + '</ul>';
      if(opts.hasFirstPage){
          dataHtml += '<div class="first fr">' + opts.firstPage + '</div>';
      }
      if(opts.hasPrv){
          dataHtml += '<div class="prv fr">' + opts.prv + '</div>';
      }
      
      obj.html(dataHtml).off("click");//闂傚啫寮堕娑㈠箵閹哄秵顐介梺鎻掔Т椤﹁尙鎷崘顏呮殢闁哄啳顔愮槐婵嬫煂瀹ュ拋妲荤紓浣瑰灥閻ｇ偓绂嶇€ｂ晜顐
      
      obj.on('click', '.next', function () {
        var pageshow = parseInt($('.' + active).html());
        var nums,flag;
        var a = n % 2;
        if(a == 0){
          //闁稿鍩栭弳锟
          nums = n;
          flag = true;
        }else if(a == 1){
          //濠靛倸娲﹂弳锟
          nums = (n+1);
          flag = false;
        }
        if(pageshow >= l) {
          return;
        }else if(pageshow > 0&&pageshow <= nums/2){
          //闁哄牃鍋撻柛鎾崇Т閸ゆ垶銇勯敓锟
          $('.' + active).removeClass(active).parent().next().find('a').addClass(active);
        }else if((pageshow > l-nums/2&&pageshow < l&&flag==false)||(pageshow > l-nums/2-1&&pageshow < l&&flag==true)){
          //闁哄牃鍋撻柛姘閸ゆ垶銇勯敓锟
          $('.' + active).removeClass(active).parent().next().find('a').addClass(active);
        }else{
          $('.' + active).removeClass(active).parent().next().find('a').addClass(active);
          fpageShow(pageshow+1);
        }
        opts.callBack(pageshow+1);
      });
      obj.on('click', '.prv', function () {
        var pageshow = parseInt($('.' + active).html());
        var nums = odevity(n);
        if (pageshow <= 1) {
            return;
        }else if((pageshow > 1&&pageshow <= nums/2)||(pageshow > l-nums/2&&pageshow < l+1)){
          //闁哄牃鍋撻柛鎾崇Т閸ゆ垶銇勭憴鍕仐闁哄牃鍋撻柛姘閸ゆ垶銇勯敓锟
          $('.' + active).removeClass(active).parent().prev().find('a').addClass(active);
        }else {
          $('.' + active).removeClass(active).parent().prev().find('a').addClass(active);
          fpageShow(pageshow-1);
        }
        opts.callBack(pageshow-1);
      });

      obj.on('click', '.first', function(){
        var activepage = parseInt($('.' + active).html());
        if (activepage <= 1){
          return
        }//鐟滅増鎸告晶鐘电箔椤戣法顏卞銈忔嫹
        opts.callBack(1);
        fpagePrv(0);
      });
      obj.on('click', '.last', function(){
        var activepage = parseInt($('.' + active).html());
        if (activepage >= l){
          return;
        }//鐟滅増鎸告晶鐘诲嫉閳ь剟宕ユ惔婵堫伇濡炪倧鎷
        opts.callBack(l);
        if(l>n){
          fpageNext(n-1);
        }else{
          fpageNext(l-1);
        }
      });

      obj.on('click', 'li', function(){
        var $this = $(this);
        var pageshow = parseInt($this.find('a').html());
        var nums = odevity(n);
        opts.callBack(pageshow);
        if(l>n){
          if(pageshow > l-nums/2&&pageshow < l+1){
            //闁哄牃鍋撻柛姘閸ゆ垶銇勯敓锟
            fpageNext((n-1)-(l-pageshow));
          }else if(pageshow > 0&&pageshow < nums/2){
            //闁哄牃鍋撻柛鎾崇Т閸ゆ垶銇勯敓锟
            fpagePrv(pageshow-1);
          }else{
            fpageShow(pageshow);
          }
        }else{
          $('.' + active).removeClass(active);
          $this.find('a').addClass(active);
        }
      });

          //闂佹彃绉甸弻濠傘€掗崣澶屽帬缂備焦鎸婚悗锟
        /*activePage 鐟滅増鎸告晶鐘炽亜閿燂拷*/
        function fpageShow(activePage){
          var nums = odevity(n);
          var pageStart = activePage - (nums/2-1);
          var str1 = '';
          for(i=0;i<n;i++){
            str1 += '<li><a href="javascript:" class="">' + (pageStart+i) + '</a></li>'
          }
          obj.find('ul').html(str1);
          obj.find('ul li').eq(nums/2-1).find('a').addClass(active);
        }
        /*index 闂侇偄顦懙鎴炪亜閸︻厼鍋嶇€殿噯鎷?/
        function fpagePrv(index){
          var str1 = '';
          if(l>n-1){
            for(i=0;i<n;i++){
              str1 += '<li><a href="javascript:" class="">' + (i+1) + '</a></li>'
            }
          }else{
            for(i=0;i<l;i++){
              str1 += '<li><a href="javascript:" class="">' + (i+1) + '</a></li>'
            }
          }
          obj.find('ul').html(str1);
          obj.find('ul li').eq(index).find('a').addClass(active);
        }
        /*index 闂侇偄顦懙鎴炪亜閸︻厼鍋嶇€殿噯鎷?/
        function fpageNext(index){
          var str1 = '';
          if(l>n-1){
            for(i=l-(n-1);i<l+1;i++){
              str1 += '<li><a href="javascript:" class="">' + i + '</a></li>'
            }
           obj.find('ul').html(str1);
           obj.find('ul li').eq(index).find('a').addClass(active);
          }else{
            for(i=0;i<l;i++){
              str1 += '<li><a href="javascript:" class="">' + (i+1) + '</a></li>'
            }
           obj.find('ul').html(str1);
           obj.find('ul li').eq(index).find('a').addClass(active);
          }
        }
        //闁告帇鍊栭弻鍣噄Nums闁汇劌瀚〃宀勫磻閼哥鍋撻敓锟
        function odevity(n){
          var a = n % 2;
          if(a == 0){
            //闁稿鍩栭弳锟
            return n;
          }else if(a == 1){
            //濠靛倸娲﹂弳锟
            return (n+1);
          }
        }
    });
  }
})(jQuery);