/**
 * pagination.js 1.5.1
 * A jQuery plugin to provide simple yet fully customisable pagination.
 * @version 1.5.1
 * @author mss
 * @url https://github.com/Maxiaoxiang/jQuery-plugins
 *
 * @调用方法
 * $(selector).pagination(option, callback);
 * -此处callback是初始化调用，option里的callback是点击页码后调用
 *
 * -- example --
 * $(selector).pagination({
 *     ... // 配置参数
 *     callback: function(api) {
 *         console.log('点击页码调用该回调'); //切换页码时执行一次回调
 *     }
 * }, function(){
 *     console.log('初始化'); //插件初始化时调用该方法，比如请求第一次接口来初始化分页配置
 * });
 */
(function (factory) {
  if (typeof define === "function" && (define.amd || define.cmd) && !jQuery) {
    // AMD或CMD
    define(["jquery"], factory);
  } else if (typeof module === "object" && module.exports) {
    // Node/CommonJS
    module.exports = function (root, jQuery) {
      if (jQuery === undefined) {
        if (typeof window !== "undefined") {
          jQuery = require("jquery");
        } else {
          jQuery = require("jquery")(root);
        }
      }
      factory(jQuery);
      return jQuery;
    };
  } else {
    //Browser globals
    factory(jQuery);
  }
})(function ($) {
  //配置参数
  var defaults = {
    totalData: 0, //数据总条数
    showData: 0, //每页显示的条数
    pageCount: 9, //总页数,默认为9
    current: 1, //当前第几页
    prevCls: "prev", //上一页class
    nextCls: "next", //下一页class
    prevContent: "<", //上一页内容
    nextContent: ">", //下一页内容
    activeCls: "active", //当前页选中状态
    coping: false, //首页和尾页
    isHide: false, //当前页数为0页或者1页时不显示分页
    homePage: "", //首页节点内容
    endPage: "", //尾页节点内容
    keepShowPN: false, //是否一直显示上一页下一页
    mode: "unfixed", //分页模式，unfixed：不固定页码数量，fixed：固定页码数量
    count: 4, //mode为unfixed时显示当前选中页前后页数，mode为fixed显示页码总数
    jump: false, //跳转到指定页数
    jumpIptCls: "jump-ipt", //文本框内容
    jumpBtnCls: "jump-btn", //跳转按钮
    jumpBtn: "跳转", //跳转按钮文本
    callback: function () {}, //回调
  };

  var Pagination = function (element, options) {
    //全局变量
    var opts = options, //配置
      current, //当前页
      $document = $(document),
      $obj = $(element); //容器

    /**
     * 设置总页数
     * @param {int} page 页码
     * @return opts.pageCount 总页数配置
     */
    this.setPageCount = function (page) {
      return (opts.pageCount = page);
    };

    /**
     * 获取总页数
     * 如果配置了总条数和每页显示条数，将会自动计算总页数并略过总页数配置，反之
     * @return {int} 总页数
     */
    this.getPageCount = function () {
      return opts.totalData && opts.showData
        ? Math.ceil(parseInt(opts.totalData) / opts.showData)
        : opts.pageCount;
    };

    /**
     * 获取当前页
     * @return {int} 当前页码
     */
    this.getCurrent = function () {
      return current;
    };

    /**
     * 填充数据
     * @param {int} 页码
     */
    this.filling = function (index) {
      var html = "";
      current = parseInt(index) || parseInt(opts.current); //当前页码
      var pageCount = this.getPageCount(); //获取的总页数
      switch (
        opts.mode //配置模式
      ) {
        case "fixed": //固定按钮模式
          html +=
            '<a href="javascript:;" class="' +
            opts.prevCls +
            '">' +
            opts.prevContent +
            "</a>";
          if (opts.coping) {
            var home = opts.coping && opts.homePage ? opts.homePage : "1";
            html += '<a href="javascript:;" data-page="1">' + home + "</a>";
          }
          var start =
            current > opts.count - 1
              ? current + opts.count - 1 > pageCount
                ? current - (opts.count - (pageCount - current))
                : current - 2
              : 1;
          var end =
            current + opts.count - 1 > pageCount
              ? pageCount
              : start + opts.count;
          for (; start <= end; start++) {
            if (start != current) {
              html +=
                '<a href="javascript:;" data-page="' +
                start +
                '">' +
                start +
                "</a>";
            } else {
              html +=
                '<span class="' + opts.activeCls + '">' + start + "</span>";
            }
          }
          if (opts.coping) {
            var _end = opts.coping && opts.endPage ? opts.endPage : pageCount;
            html +=
              '<a href="javascript:;" data-page="' +
              pageCount +
              '">' +
              _end +
              "</a>";
          }
          html +=
            '<a href="javascript:;" class="' +
            opts.nextCls +
            '">' +
            opts.nextContent +
            "</a>";
          break;
        case "unfixed": //不固定按钮模式
          if (opts.keepShowPN || current > 1) {
            //上一页
            html +=
              '<a href="javascript:;" class="' +
              opts.prevCls +
              '">' +
              opts.prevContent +
              "</a>";
          } else {
            if (opts.keepShowPN == false) {
              $obj.find("." + opts.prevCls) &&
                $obj.find("." + opts.prevCls).remove();
            }
          }
          if (
            current >= opts.count + 2 &&
            current != 1 &&
            pageCount != opts.count
          ) {
            var home = opts.coping && opts.homePage ? opts.homePage : "1";
            html += opts.coping
              ? '<a href="javascript:;" data-page="1">' +
                home +
                "</a><span>...</span>"
              : "";
          }
          var start = current - opts.count <= 1 ? 1 : current - opts.count;
          var end =
            current + opts.count >= pageCount
              ? pageCount
              : current + opts.count;
          for (; start <= end; start++) {
            if (start <= pageCount && start >= 1) {
              if (start != current) {
                html +=
                  '<a href="javascript:;" data-page="' +
                  start +
                  '">' +
                  start +
                  "</a>";
              } else {
                html +=
                  '<span class="' + opts.activeCls + '">' + start + "</span>";
              }
            }
          }
          if (
            current + opts.count < pageCount &&
            current >= 1 &&
            pageCount > opts.count
          ) {
            var end = opts.coping && opts.endPage ? opts.endPage : pageCount;
            html += opts.coping
              ? '<span>...</span><a href="javascript:;" data-page="' +
                pageCount +
                '">' +
                end +
                "</a>"
              : "";
          }
          if (opts.keepShowPN || current < pageCount) {
            //下一页
            html +=
              '<a href="javascript:;" class="' +
              opts.nextCls +
              '">' +
              opts.nextContent +
              "</a>";
          } else {
            if (opts.keepShowPN == false) {
              $obj.find("." + opts.nextCls) &&
                $obj.find("." + opts.nextCls).remove();
            }
          }
          break;
        case "easy": //简单模式
          break;
        default:
      }
      html += opts.jump
        ? '<input type="text" class="' +
          opts.jumpIptCls +
          '"><a href="javascript:;" class="' +
          opts.jumpBtnCls +
          '">' +
          opts.jumpBtn +
          "</a>"
        : "";
      $obj.empty().html(html);
    };

    //绑定事件
    this.eventBind = function () {
      var that = this;
      var pageCount = that.getPageCount(); //总页数
      var index = 1;
      $obj.off().on("click", "a", function () {
        if ($(this).hasClass(opts.nextCls)) {
          if ($obj.find("." + opts.activeCls).text() >= pageCount) {
            $(this).addClass("disabled");
            return false;
          } else {
            index = parseInt($obj.find("." + opts.activeCls).text()) + 1;
          }
        } else if ($(this).hasClass(opts.prevCls)) {
          if ($obj.find("." + opts.activeCls).text() <= 1) {
            $(this).addClass("disabled");
            return false;
          } else {
            index = parseInt($obj.find("." + opts.activeCls).text()) - 1;
          }
        } else if ($(this).hasClass(opts.jumpBtnCls)) {
          if ($obj.find("." + opts.jumpIptCls).val() !== "") {
            index = parseInt($obj.find("." + opts.jumpIptCls).val());
          } else {
            return;
          }
        } else {
          index = parseInt($(this).data("page"));
        }
        that.filling(index);
        typeof opts.callback === "function" && opts.callback(that);
      });
      //输入跳转的页码
      $obj.on("input propertychange", "." + opts.jumpIptCls, function () {
        var $this = $(this);
        var val = $this.val();
        var reg = /[^\d]/g;
        if (reg.test(val)) $this.val(val.replace(reg, ""));
        parseInt(val) > pageCount && $this.val(pageCount);
        if (parseInt(val) === 0) $this.val(1); //最小值为1
      });
      //回车跳转指定页码
      $document.keydown(function (e) {
        if (e.keyCode == 13 && $obj.find("." + opts.jumpIptCls).val()) {
          var index = parseInt($obj.find("." + opts.jumpIptCls).val());
          that.filling(index);
          typeof opts.callback === "function" && opts.callback(that);
        }
      });
    };

    //初始化
    this.init = function () {
      this.filling(opts.current);
      this.eventBind();
      if (
        (opts.isHide && this.getPageCount() == "1") ||
        this.getPageCount() == "0"
      ) {
        $obj.hide();
      } else {
        $obj.show();
      }
    };
    this.init();
  };

  $.fn.pagination = function (parameter, callback) {
    if (typeof parameter == "function") {
      //重载
      callback = parameter;
      parameter = {};
    } else {
      parameter = parameter || {};
      callback = callback || function () {};
    }
    var options = $.extend({}, defaults, parameter);
    return this.each(function () {
      var pagination = new Pagination(this, options);
      callback(pagination);
    });
  };
});