using System;
using System.Windows.Forms;

namespace HL_FristAidPlatform_Public
{
    public partial class UserControlForPage : UserControl
    {
        #region 变量

        /// <summary>
        /// 总条数
        /// </summary>
        private int totalNumber = 0;

        /// <summary>
        /// 每页条数
        /// </summary>
        private int pageSize = 10;

        /// <summary>
        /// 当前页
        /// </summary>
        private int curPage = 1;

        /// <summary>
        /// 委托
        /// </summary>
        /// <param name="curPage"></param>
        /// <param name="pageSize"></param>
        public delegate void MyPagerEvents(int curPage, int pageSize);

        /// <summary>
        /// 委托
        /// </summary>
        /// <param name="curPage"></param>
        /// <param name="pageSize"></param>
        public delegate void ExportEvents(bool singlePage);//单页，所有

        /// <summary>
        /// 基于上面的委托定义事件
        /// </summary>
        public event MyPagerEvents myPagerEvents;

        /// <summary>
        /// 基于上面的委托定义事件
        /// </summary>
        public event ExportEvents exportEvents;

        #endregion 变量

        public UserControlForPage()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 计算分页,分页大小，总记录数。
        /// </summary>
        /// <param name="pageSize"></param>
        /// <param name="totalNumber"></param>
        /// <param name="curPage"></param>
        public void RefreshPager(int pageSize, int totalNumber, int curPage)
        {
            try
            {
                this.totalNumber = totalNumber;
                this.pageSize = pageSize;
                this.curPage = curPage;
                lcStatus.Text = string.Format("(共{0}条记录，每页{1}条，共{2}页)", totalNumber, pageSize, GetPageCount());
                textEditToPage.Text = curPage.ToString();
                comboBoxEditPageSize.Text = pageSize.ToString();

                if (curPage == 0)
                {
                    if (GetPageCount() > 0 && myPagerEvents != null)
                    {
                        curPage = 1;
                        myPagerEvents(curPage, pageSize);
                    }
                }
                if (curPage > GetPageCount() && myPagerEvents != null)
                {
                    curPage = GetPageCount();
                    myPagerEvents(curPage, pageSize);
                }
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "RefreshPager：\r\n" + ex);
            }
        }

        /// <summary>
        /// 获取总记录数
        /// </summary>
        /// <returns></returns>
        public int GetTotalNumber()
        {
            return totalNumber;
        }

        /// <summary>
        /// 获得当前页编号，从1开始
        /// </summary>
        /// <returns></returns>
        public int GetCurPage()
        {
            return curPage;
        }

        /// <summary>
        /// 获得总页数
        /// </summary>
        /// <returns></returns>
        public int GetPageCount()
        {
            try
            {
                int count = 0;
                if (totalNumber % pageSize == 0)
                {
                    count = totalNumber / pageSize;
                }
                else
                {
                    count = totalNumber / pageSize + 1;
                }

                if (count == 0)
                {
                    count = 1;
                }
                return count;
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "获得总页数：\r\n" + ex);
                return 0;
            }
        }

        /// <summary>
        /// 下一页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void simpleButtonNext_Click(object sender, EventArgs e)
        {
            try
            {
                if (myPagerEvents != null)
                {
                    if (curPage < GetPageCount())
                        curPage += 1;
                    myPagerEvents(curPage, pageSize);
                }
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "下一页：\r\n" + ex);
            }
        }

        /// <summary>
        /// 最后一页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void simpleButtonEnd_Click(object sender, EventArgs e)
        {
            try
            {
                if (myPagerEvents != null)
                {
                    curPage = GetPageCount();
                    myPagerEvents(curPage, pageSize);
                }
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "最后一页：\r\n" + ex);
            }
        }

        /// <summary>
        /// 上一页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void simpleButtonPre_Click(object sender, EventArgs e)
        {
            try
            {
                if (myPagerEvents != null)
                {
                    if (curPage > 1)
                        curPage -= 1;
                    myPagerEvents(curPage, pageSize);
                }
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "上一页：\r\n" + ex);
            }
        }

        /// <summary>
        /// 首页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void simpleButtonFirst_Click(object sender, EventArgs e)
        {
            try
            {
                if (myPagerEvents != null)
                {
                    curPage = 1;
                    myPagerEvents(curPage, pageSize);
                }
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "首页：\r\n" + ex);
            }
        }

        /// <summary>
        /// 跳转
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void simpleButtonToPage_Click(object sender, EventArgs e)
        {
            try
            {
                int selPage = Convert.ToInt32(textEditToPage.Text);
                if (myPagerEvents != null)
                {
                    if ((selPage >= 1) && (selPage <= GetPageCount()))
                        curPage = selPage;
                    myPagerEvents(curPage, pageSize);
                }
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "跳转：\r\n" + ex);
            }
        }

        /// <summary>
        /// 到处当前页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void simpleButtonExportCurPage_Click(object sender, EventArgs e)
        {
            try
            {
                if (exportEvents != null)
                {
                    exportEvents(true);
                }
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "到处当前页：\r\n" + ex);
            }
        }

        /// <summary>
        /// 导出全部页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void simpleButtonExportAllPage_Click(object sender, EventArgs e)
        {
            try
            {
                exportEvents?.Invoke(false);
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "导出全部页：\r\n" + ex);
            }
        }

        /// <summary>
        /// 每页大小
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void comboBoxEditPageSize_EditValueChanged(object sender, EventArgs e)
        {
            try
            {
                int pageSize = Convert.ToInt32(comboBoxEditPageSize.Text);
                if ((pageSize > 0) && myPagerEvents != null)
                {
                    this.pageSize = pageSize;
                    myPagerEvents(curPage, pageSize);
                }
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog("分页控件", "每页大小：\r\n" + ex);
            }
        }
    }
}