using DataEntity.Page;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using XCommon.Log;
using UserControl = System.Windows.Controls.UserControl;

namespace XHandler.View.Page
{
    /// <summary>
    /// 分页组件
    /// </summary>
    public partial class PagerToolsControl : UserControl
    {
        #region 变量
        /// <summary>
        /// 当前页改变时发生
        /// </summary>
        public event C_EventClass.OnPagerIndexChangedEventHandler PageCntChanged = null;

        /// <summary>
        /// 每页行数改变时发生
        /// </summary>
        public event C_EventClass.OnPagerNumChangedEventHandler OnePageRowCntChanged = null;


        /// <summary>
        /// 总页数
        /// </summary>
        public int Total
        {
            get { return nAllPageCnt; }
        }

        /// <summary>
        /// 数据总数
        /// </summary>
        [Description("数据总数"), Browsable(false)]
        public int DataCount
        {
            get { return nAllDataCount; }
            set
            {
                nAllDataCount = value;
                nAllPageCnt = ((nAllDataCount + nOnePageRowCnt - 1) / nOnePageRowCnt);
                tBoxDataCnt.Text = aDataCountLable.Replace("#count", nAllDataCount.ToString());
                UpdataTotal();
            }
        }

        /// <summary>
        /// 当前页数
        /// </summary>
        [Description("当前页"), Browsable(false)]
        public int Current
        {
            get { return nCurrentPageNo; }
            set
            {
                if (value < 1)
                {
                    value = 1;
                }
                else if (value > nAllPageCnt)
                {
                    value = nAllPageCnt;
                }

                nCurrentPageNo = value;
                UpdataCurrent();
            }
        }

        /// <summary>
        /// 每页行数
        /// </summary>
        [Description("每页的行数"), Browsable(false)]
        public int PagerNum
        {
            get { return nOnePageRowCnt; }
            set
            {
                nOnePageRowCnt = value;

                isTrigger = false;
                /*更新完每页行数，要先更新总页数，再触发相关事件*/
                nAllPageCnt = ((nAllDataCount + nOnePageRowCnt - 1) / nOnePageRowCnt);
                UpdataTotal();
                UpdataCurrent();
                isTrigger = true;

                OnPagerNumChanged();
            }
        }

        /// <summary>
        /// 是否触发事件
        /// </summary>
        [Description("控制分页组件是否响应事件，主要用于代码设置分页组件，而不触发事件"), Browsable(false)]
        public bool IsTrigger
        {
            get { return isTrigger; }
            set { isTrigger = value; }
        }

        [Description("设置或获取数据总数的显示消息内容;#count 为占位符，将自动替换成数据总数")]
        public string DataCountLable
        {
            get
            {
                return aDataCountLable;
            }
            set
            {
                aDataCountLable = value;
            }
        }

        private string aDataCountLable = "共 #count 行";

        /// <summary>
        /// 总页数
        /// </summary>
        private int nAllPageCnt = 0;

        /// <summary>
        /// 数据总数
        /// </summary>
        private int nAllDataCount = 0;

        /// <summary>
        /// 当前页数
        /// </summary>
        private int nCurrentPageNo = 0;

        /// <summary>
        /// 每页行数
        /// </summary>
        private int nOnePageRowCnt = PaginationDefaultParameter.PageSize;

        /// <summary>
        /// 每页行数列表
        /// </summary>
        private List<int> OnePageRowCntList = new List<int>(new int[] { 15, 30, 50, 70, 100 });

        /// <summary>
        /// 是否需要触发相关事件
        /// </summary>
        private bool isTrigger = true;

        /// <summary>
        /// 触发事件的当前页号，用来防止当前页改变时的二次触发
        /// </summary>
        private int nTriggerPageNo = 0;
        #endregion

        #region 构造函数
        public PagerToolsControl()
        {
            InitializeComponent();
            //Dock = DockStyle.Bottom;
            tBoxDataCnt.Text = aDataCountLable;
            isTrigger = false;
            foreach (int iObj in OnePageRowCntList)
            {
                cBoxOnePageRowCnt.Items.Add(iObj);
            }
            cBoxOnePageRowCnt.SelectedIndex = 0;
            isTrigger = true;
        }
        #endregion

        #region 页面初始化
        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            try
            {
                DataCount = 0;
            }
            catch (Exception ex)
            {
                LoggerHelper.ErrorLog("ERROR:", ex);
            }
        }
        #endregion

        /// <summary>
        /// 更新总页数
        /// </summary>
        private void UpdataTotal()
        {
            //tlab_total.Text = string.Format(tlab_total.Tag.ToString(), aTotal);

            cBoxPageCnt.Items.Clear();
            for (int i = 0; i < nAllPageCnt; i++)
            {
                cBoxPageCnt.Items.Add(i + 1);
            }
            cBoxPageCnt.SelectedIndex = 0;

            if (nCurrentPageNo > nAllPageCnt)
                Current = nAllPageCnt;
            else
            {
                cBoxPageCnt.SelectedIndex = nCurrentPageNo - 1;
                OnPagerIndexChanged();
                UpdataView();
            }
        }

        /// <summary>
        /// 更新当前页
        /// </summary>
        private void UpdataCurrent()
        {
            tBoxCurrentPageNo.Text = nCurrentPageNo.ToString();
            cBoxPageCnt.SelectedIndex = nCurrentPageNo - 1;

            UpdataView();
            OnPagerIndexChanged();
        }

        /// <summary>
        /// 更新界面
        /// </summary>
        private void UpdataView()
        {
            if (nAllPageCnt == 0)
            {
                gridFirstPage.IsEnabled = gridLastPage.IsEnabled
                    = gridNextPage.IsEnabled = gridPreviousPage.IsEnabled
                    = tBoxCurrentPageNo.IsEnabled
                    = cBoxPageCnt.IsEnabled = false;
                return;
            }

            if ((nCurrentPageNo == 1) && (nCurrentPageNo < nAllPageCnt))
            {
                gridFirstPage.IsEnabled = gridPreviousPage.IsEnabled = false;

                gridLastPage.IsEnabled = gridNextPage.IsEnabled
                    = tBoxCurrentPageNo.IsEnabled
                    = cBoxPageCnt.IsEnabled = true;
            }
            else if ((nCurrentPageNo == 1) && (nCurrentPageNo == nAllPageCnt))
            {
                gridFirstPage.IsEnabled = gridPreviousPage.IsEnabled
                    = gridLastPage.IsEnabled = gridNextPage.IsEnabled
                    = false;

                tBoxCurrentPageNo.IsEnabled
                    = cBoxPageCnt.IsEnabled = true;
            }
            else if ((nCurrentPageNo > 1) && (nCurrentPageNo < nAllPageCnt))
            {
                gridFirstPage.IsEnabled = gridPreviousPage.IsEnabled
                    = gridLastPage.IsEnabled = gridNextPage.IsEnabled
                    = tBoxCurrentPageNo.IsEnabled
                    = cBoxPageCnt.IsEnabled = true;
            }
            else if ((nCurrentPageNo > 1) && (nCurrentPageNo == nAllPageCnt))
            {
                gridLastPage.IsEnabled = gridNextPage.IsEnabled = false;

                gridFirstPage.IsEnabled = gridPreviousPage.IsEnabled
                    = tBoxCurrentPageNo.IsEnabled
                    = cBoxPageCnt.IsEnabled = true;
            }
        }

        /// <summary>
        /// 更新每页行数
        /// </summary>
        private void UpdataPagerNum()
        {
            if ((cBoxOnePageRowCnt.SelectedItem != null) && (nOnePageRowCnt == ((int)cBoxOnePageRowCnt.SelectedItem)))
            {
                return;
            }

            foreach (object iItem in cBoxOnePageRowCnt.Items)
            {
                if (((int)iItem) == nOnePageRowCnt)
                {
                    cBoxOnePageRowCnt.SelectedItem = iItem;
                    return;
                }
            }
        }

        /// <summary>
        /// 当前页改变时调用事件
        /// </summary>
        private void OnPagerIndexChanged()
        {
            if (!isTrigger) return;
            //if (nTriggerPageNo == nCurrentPageNo) return;
            if (PageCntChanged != null)
            {
                C_EventArgsClass iObj = new C_EventArgsClass();
                iObj.CurrentPageNo = nCurrentPageNo;
                iObj.Total = nAllPageCnt;
                Mouse.OverrideCursor = Cursors.Wait;
                PageCntChanged(this, iObj);
                Mouse.OverrideCursor = null;
                nTriggerPageNo = nCurrentPageNo;
            }
        }

        /// <summary>
        /// 每页行数改变时调用事件
        /// </summary>
        private void OnPagerNumChanged()
        {
            if (!isTrigger) return;
            if (OnePageRowCntChanged != null)
            {
                C_EventArgsClass iObj = new C_EventArgsClass();
                iObj.CurrentPageNo = nCurrentPageNo;
                iObj.Total = nAllPageCnt;
                iObj.PagerNum = nOnePageRowCnt;
                Mouse.OverrideCursor = Cursors.Wait;
                OnePageRowCntChanged(this, iObj);
                Mouse.OverrideCursor = null;
            }
        }

        /// <summary>
        /// 首页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnFirstPage_Click(object sender, RoutedEventArgs e)
        {
            Current = 1;
        }

        /// <summary>
        /// 上一页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnPreviousPage_Click(object sender, RoutedEventArgs e)
        {
            Current--;
        }

        /// <summary>
        /// 尾页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>

        private void btnLastPage_Click(object sender, RoutedEventArgs e)
        {
            Current = nAllPageCnt;
        }

        /// <summary>
        /// 次页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnNextPage_Click(object sender, RoutedEventArgs e)
        {
            Current++;
        }

        //private void tcomb_current_SelectedIndexChanged(object sender, EventArgs e)
        //{
        //    //Current = tcomb_current.SelectedIndex + 1;
        //}

        /// <summary>
        /// 页数变更
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void cBoxPageCnt_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            Current = cBoxPageCnt.SelectedIndex + 1;
        }

        /// <summary>
        /// 每页行数变更
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void cBoxOnePageRowCnt_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (!isTrigger) return;
            PagerNum = (int)cBoxOnePageRowCnt.SelectedItem;
        }

        #region Del
        //private void ttxt_current_KeyPress(object sender, KeyPressEventArgs e)
        //{
        //    //if (e.KeyChar == 13)
        //    //{
        //    //    Current = int.Parse(ttxt_current.Text);
        //    //}

        //    //if (e.KeyChar != 8)//退格键
        //    //{
        //    //    if ((e.KeyChar < '0') || (e.KeyChar > '9'))
        //    //        e.Handled = true;
        //    //}
        //}

        //private void tcom_num_KeyPress(object sender, KeyPressEventArgs e)
        //{
        //    //if (e.KeyChar == 13)
        //    //{
        //    //    int ipagernum = int.Parse(tcom_num.Text);
        //    //    if (!aPagerNumList.Contains(ipagernum))
        //    //    {
        //    //        aPagerNumList.Add(ipagernum);
        //    //        tcom_num.Items.Add(ipagernum);
        //    //        aIsTrigger = false;
        //    //        tcom_num.SelectedItem = ipagernum;
        //    //        aIsTrigger = true;
        //    //    }
        //    //    //UpdataPagerNum();
        //    //    PagerNum = int.Parse(tcom_num.Text);
        //    //}

        //    //if (e.KeyChar != 8)//退格键
        //    //{
        //    //    if ((e.KeyChar < '0') || (e.KeyChar > '9'))
        //    //        e.Handled = true;
        //    //}
        //}
        #endregion
    }
}