using System.Text;
namespace WX.CRM.WebHelper
{
    public class PageHelper
    {

        private static int showPage = 5;
        private static string generalClass = "badge badge-inverse";
        private static string currentClass = "badge badge-warning";
        /// <summary>
        /// 获取分页字符串
        /// </summary>
        /// <param name="count">数据总量</param>
        /// <param name="pageIndex">当前索引</param>
        /// <param name="pageSize">一页的数量</param>
        /// <param name="fuc">页面Url</param>
        /// <returns></returns>
        public static string GetPage(int count, int pageIndex, int pageSize, string fuc)
        {
            StringBuilder pages = new StringBuilder();
            int pageCount = 0;
            if (count > pageSize)
            {
                pageCount = count % pageSize == 0 ? count / pageSize : count / pageSize + 1;
            }
            else pageCount = 1;
            int minIndex = pageCount - showPage;
            pages.AppendLine("当前第" + pageIndex + "页/共" + pageCount + "页&nbsp;&nbsp;共" + count + "条记录&nbsp;&nbsp;");
            if (pageIndex == 1)
            {
                pages.AppendLine("<a class='" + generalClass + "'>首页</a>&nbsp;");
                pages.AppendLine("<a class='" + generalClass + "'>上一页</a>&nbsp;");
            }
            else
            {
                pages.AppendLine("<a class='" + generalClass + "' href='javascript:" + fuc + "(1)'>首页</a>&nbsp;");
                pages.AppendLine("<a class='" + generalClass + "'  href='javascript:" + fuc + "(" + (pageIndex - 1) + ")'>上一页</a>&nbsp;");
            }
            int j = 0;
            string aclass = string.Empty;
            if (pageCount <= showPage)
            {
                for (int i = 1; i <= pageCount; i++)
                {
                    if (i == pageIndex)
                        aclass = "" + currentClass + "";
                    else
                        aclass = "" + generalClass + "";
                    pages.AppendLine("<a class='" + aclass + "' href='javascript:" + fuc + "(" + i + ")'>" + i + "</a>&nbsp;");
                    j = i;
                }
            }
            else if (pageIndex <= showPage)
            {
                for (int i = 1; i <= showPage; i++)
                {
                    if (i == pageIndex)
                        aclass = "" + currentClass + "";
                    else
                        aclass = "" + generalClass + "";
                    pages.AppendLine("<a class='" + aclass + "' href='javascript:" + fuc + "(" + i + ")'>" + i + "</a>&nbsp;");
                    j = i;
                }
                for (int i = j + 1; i <= (pageCount >= showPage * 2 ? (showPage + pageIndex - 1) : pageCount); i++)
                {
                    if (i == pageIndex)
                        aclass = currentClass;
                    else
                        aclass = generalClass;
                    pages.AppendLine("<a class='" + aclass + "' href='javascript:" + fuc + "(" + i + ")'>" + i + "</a>&nbsp;");
                }

            }
            else if (pageIndex > showPage && pageIndex <= minIndex)
            {
                for (int i = (pageIndex - showPage) + 1; i < pageIndex; i++)
                {
                    if (i == pageIndex)
                        aclass = currentClass;
                    else
                        aclass = generalClass;
                    pages.AppendLine("<a class='" + aclass + "' href='javascript:" + fuc + "(" + i + ")'>" + i + "</a>&nbsp;");
                    j = i;
                }
                for (int i = pageIndex; i <= (pageCount > showPage * 2 ? (showPage + pageIndex) : pageCount); i++)
                {
                    if (i == pageIndex)
                        aclass = currentClass;
                    else
                        aclass = generalClass;
                    pages.AppendLine("<a class='" + aclass + "' href='javascript:" + fuc + "(" + i + ")'>" + i + "</a>&nbsp;");
                }
            }
            else if (pageIndex > minIndex)
            {
                for (int i = (minIndex > 0 ? minIndex - 5 + 1 : 1); i <= pageCount; i++)
                {
                    if (i == pageIndex)
                        aclass = currentClass;
                    else
                        aclass = generalClass;
                    pages.AppendLine("<a class='" + aclass + "' href=javascript:" + fuc + "(" + i + ")>" + i + "</a>&nbsp;");
                }
            }
            if (pageIndex >= pageCount)
            {
                pages.AppendLine("<a class='" + generalClass + "'>下一页</a>&nbsp;");
                pages.AppendLine("<a class='" + generalClass + "'>尾页</a>&nbsp;");
            }
            else
            {
                pages.AppendLine("<a class='" + generalClass + "'  href='javascript:" + fuc + "(" + (pageIndex + 1) + ")'>下一页</a>&nbsp;");
                pages.AppendLine("<a class='" + generalClass + "' href='javascript:" + fuc + "(" + pageCount + ")'>尾页</a>&nbsp;");
            }
            return pages.ToString();
            //<a class=""+generalClass+"">1</a>&nbsp;<a class=""+generalClass+"">2</a>&nbsp;<a class=""+generalClass+"">3</a>&nbsp;<a class=""+generalClass+"">4</a>&nbsp;
            //<a class=""+currentClass+"">5</a>&nbsp;<a class=""+generalClass+"">...</a>&nbsp;<a class=""+generalClass+"">55</a>&nbsp;<a class=""+generalClass+"">尾页</a>
        }
    }
}