/******************************
* 说明：表格报表模版
* 创建人：龚宇超
* 创建日期：2017-11-20
* 修改人：
* 修改日期：
* 修改备注：
* 版本：1.0.0.0
******************************/
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using Lskj.Control;
using Lskj.Model;
using Lskj.Control.Model;
using Lskj.Util;
using Lskj.Data;
using Lskj.Business.Impl;
using Lskj.Business;
using System.Threading.Tasks;
using System.Collections;
using System.Reflection;

namespace Lskj.Report
{
    public partial class FrmMain : BaseForm
    {
        /// <summary>
        /// 报表动态链接库参数
        /// </summary>
        public DynamicReportModel Model;

        private readonly HashSet<DevExpress.XtraGrid.Views.Base.BaseView>
            mPreexistingGridLocalizerViews = CaptureGridLocalizerViews();
        private readonly HashSet<DevExpress.XtraGrid.Views.Base.BaseView>
            mReportGridLocalizerViews =
                new HashSet<DevExpress.XtraGrid.Views.Base.BaseView>();
        private bool mReportGridResourcesReleased;

        public FrmMain()
        {
            InitializeComponent();
            this.Disposed += OnFrmMainDisposed;
        }

        /// <summary>
        /// <para>说明：窗口加载</para>
        /// <para>创建人：龚宇超</para>
        /// <para>创建日期：2017-11-21 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
        protected override void OnLoad(EventArgs e)
        {
            WaitForm.ShowForm();
            try
            {
                Dictionary<object, Hashtable> dataCaches = Model != null ? Model.DataCaches : null;
                this.Model.Privilege = this.Model.Privilege.Equals("3") ? "1" : Model.ModuleId > 0 ? BaseImpl.GetUserPurviewsByMenuId(Model.ModuleId + "") + "" : BaseImpl.GetUserPurviewsByMenuCode(Model.ModuleCode) + "";

                this.mControl.ModuleGridDetailObj.ModuleGridObj.VisibleOperPanel = false;

                if (!dataCaches.GetValue(this, "Details", out List<GridDetailModel> details))
                {
                    details = GetReportDetails();
                }

                this.mControl.Details = details;
                this.mControl.InitControls(Model);
                CaptureReportGridLocalizerViews();
                this.FormClosing += new FormClosingEventHandler(OnClose);
            }
            catch (Exception ex)
            {
                LogHelper.Instance.WriteError(ex, ResourceKeys.BaseReport);
                //MessageUtil.Show(ex.Message + "\r\n" + ex.StackTrace);
                string Message = ErrorMessage.PromptErrorMessage(ex);
                MessageUtil.Show(Message, ex.Message);
            }
            finally
            {
                Lskj.Control.Model.AutoSizeChange.ControllInitializeSize(this);
                this.mControl.Visible = true;
            }

            WaitForm.HideForm();
        }

        private void OnClose(object sender, FormClosingEventArgs e)
        {
            this.mControl.CloseModule();
        }

        private void OnFrmMainDisposed(object sender, EventArgs e)
        {
            DisposeReportGridViews();
            mReportGridLocalizerViews.Clear();
            mPreexistingGridLocalizerViews.Clear();
            this.FormClosing -= OnClose;
            this.Disposed -= OnFrmMainDisposed;

            DynamicReportModel model = this.Model;
            this.Model = null;
            if (model == null || model.DataCaches == null)
            {
                return;
            }

            try
            {
                model.DataCaches.Clear();
            }
            catch (Exception ex)
            {
                LogHelper.Instance.WriteError(ex, ResourceKeys.BaseReport);
            }
        }

        private void DisposeReportGridViews()
        {
            if (mReportGridResourcesReleased)
            {
                return;
            }

            mReportGridResourcesReleased = true;
            CaptureReportGridLocalizerViews();
            if (this.mControl != null)
            {
                this.mControl.ReleaseResourcesForDispose();
            }

            HashSet<DevExpress.XtraGrid.Views.Base.BaseView> disposedViews =
                new HashSet<DevExpress.XtraGrid.Views.Base.BaseView>();
            foreach (System.Windows.Forms.Control control in
                EnumerateControls(this.mControl))
            {
                DevExpress.XtraGrid.GridControl gridControl =
                    control as DevExpress.XtraGrid.GridControl;
                if (gridControl != null)
                {
                    try
                    {
                        if (gridControl.DataSource != null)
                        {
                            gridControl.DataSource = null;
                        }
                    }
                    catch (Exception ex)
                    {
                        LogHelper.Instance.WriteError(ex, ResourceKeys.BaseReport);
                    }

                    DevExpress.XtraGrid.Views.Base.BaseView[] views =
                        gridControl.ViewCollection
                            .Cast<DevExpress.XtraGrid.Views.Base.BaseView>()
                            .ToArray();
                    foreach (DevExpress.XtraGrid.Views.Base.BaseView view in views)
                    {
                        if (view == null || !disposedViews.Add(view))
                        {
                            continue;
                        }

                        try
                        {
                            view.Dispose();
                        }
                        catch (Exception ex)
                        {
                            LogHelper.Instance.WriteError(ex, ResourceKeys.BaseReport);
                        }
                    }
                }

                Type controlType = control.GetType();
                if (controlType.FullName != null &&
                    controlType.FullName.StartsWith(
                        "DevExpress.XtraTreeList.",
                        StringComparison.Ordinal))
                {
                    try
                    {
                        PropertyInfo dataSourceProperty =
                            controlType.GetProperty(
                                "DataSource",
                                BindingFlags.Instance |
                                BindingFlags.Public);
                        if (dataSourceProperty != null &&
                            dataSourceProperty.CanRead &&
                            dataSourceProperty.CanWrite &&
                            dataSourceProperty.GetValue(control, null) != null)
                        {
                            dataSourceProperty.SetValue(control, null, null);
                        }
                    }
                    catch (Exception ex)
                    {
                        LogHelper.Instance.WriteError(ex, ResourceKeys.BaseReport);
                    }
                }
            }

            ReleaseTrackedGridLocalizerViews(disposedViews);
        }

        private void CaptureReportGridLocalizerViews()
        {
            HashSet<DevExpress.XtraGrid.Views.Base.BaseView> currentViews =
                CaptureGridLocalizerViews();
            foreach (DevExpress.XtraGrid.Views.Base.BaseView view in currentViews)
            {
                if (!mPreexistingGridLocalizerViews.Contains(view))
                {
                    mReportGridLocalizerViews.Add(view);
                }
            }
        }

        private int ReleaseTrackedGridLocalizerViews(
            HashSet<DevExpress.XtraGrid.Views.Base.BaseView> disposedViews)
        {
            foreach (DevExpress.XtraGrid.Views.Base.BaseView view in
                mReportGridLocalizerViews)
            {
                if (view == null ||
                    (disposedViews != null && !disposedViews.Add(view)))
                {
                    continue;
                }

                try
                {
                    view.Dispose();
                }
                catch (Exception exception)
                {
                    LogHelper.Instance.WriteError(exception, ResourceKeys.BaseReport);
                }
            }

            return RemoveGridLocalizerHandlers(mReportGridLocalizerViews);
        }

        private static HashSet<DevExpress.XtraGrid.Views.Base.BaseView>
            CaptureGridLocalizerViews()
        {
            HashSet<DevExpress.XtraGrid.Views.Base.BaseView> result =
                new HashSet<DevExpress.XtraGrid.Views.Base.BaseView>();
            try
            {
                var activeLocalizer =
                    DevExpress.XtraGrid.Localization.GridLocalizer.Active;
                if (activeLocalizer == null)
                {
                    return result;
                }

                Type currentType = activeLocalizer.GetType();
                while (currentType != null && currentType != typeof(object))
                {
                    FieldInfo[] fields = currentType.GetFields(
                        BindingFlags.Instance |
                        BindingFlags.Static |
                        BindingFlags.Public |
                        BindingFlags.NonPublic |
                        BindingFlags.DeclaredOnly);
                    foreach (FieldInfo field in fields)
                    {
                        if (!typeof(Delegate).IsAssignableFrom(field.FieldType))
                        {
                            continue;
                        }

                        object owner = field.IsStatic ? null : (object)activeLocalizer;
                        Delegate current;
                        try
                        {
                            current = field.GetValue(owner) as Delegate;
                        }
                        catch
                        {
                            continue;
                        }
                        if (current == null)
                        {
                            continue;
                        }

                        foreach (Delegate handler in current.GetInvocationList())
                        {
                            if (IsGridLocalizerHandler(handler))
                            {
                                result.Add(
                                    (DevExpress.XtraGrid.Views.Base.BaseView)
                                    handler.Target);
                            }
                        }
                    }

                    currentType = currentType.BaseType;
                }
            }
            catch
            {
                // Diagnostics cleanup must never interfere with form construction.
            }

            return result;
        }

        private static int RemoveGridLocalizerHandlers(
            HashSet<DevExpress.XtraGrid.Views.Base.BaseView> targetViews)
        {
            if (targetViews == null || targetViews.Count == 0)
            {
                return 0;
            }

            int removedCount = 0;
            try
            {
                var activeLocalizer =
                    DevExpress.XtraGrid.Localization.GridLocalizer.Active;
                if (activeLocalizer == null)
                {
                    return 0;
                }

                Type currentType = activeLocalizer.GetType();
                while (currentType != null && currentType != typeof(object))
                {
                    FieldInfo[] fields = currentType.GetFields(
                        BindingFlags.Instance |
                        BindingFlags.Static |
                        BindingFlags.Public |
                        BindingFlags.NonPublic |
                        BindingFlags.DeclaredOnly);
                    foreach (FieldInfo field in fields)
                    {
                        if (!typeof(Delegate).IsAssignableFrom(field.FieldType))
                        {
                            continue;
                        }

                        object owner = field.IsStatic ? null : (object)activeLocalizer;
                        Delegate current;
                        try
                        {
                            current = field.GetValue(owner) as Delegate;
                        }
                        catch
                        {
                            continue;
                        }
                        if (current == null)
                        {
                            continue;
                        }

                        Delegate retained = null;
                        int fieldRemovedCount = 0;
                        foreach (Delegate handler in current.GetInvocationList())
                        {
                            DevExpress.XtraGrid.Views.Base.BaseView view =
                                handler.Target as DevExpress.XtraGrid.Views.Base.BaseView;
                            if (IsGridLocalizerHandler(handler) &&
                                targetViews.Contains(view))
                            {
                                fieldRemovedCount++;
                                continue;
                            }

                            retained = retained == null
                                ? handler
                                : Delegate.Combine(retained, handler);
                        }

                        if (fieldRemovedCount == 0)
                        {
                            continue;
                        }

                        try
                        {
                            field.SetValue(owner, retained);
                            removedCount += fieldRemovedCount;
                        }
                        catch
                        {
                            // Some DevExpress versions expose a read-only backing field.
                        }
                    }

                    currentType = currentType.BaseType;
                }
            }
            catch
            {
                // Diagnostics cleanup must never interfere with form disposal.
            }

            return removedCount;
        }

        private static bool IsGridLocalizerHandler(Delegate handler)
        {
            return handler != null &&
                string.Equals(
                    handler.Method.Name,
                    "OnLocalizer_Changed",
                    StringComparison.Ordinal) &&
                handler.Target is DevExpress.XtraGrid.Views.Base.BaseView;
        }

        private static IEnumerable<System.Windows.Forms.Control> EnumerateControls(
            System.Windows.Forms.Control root)
        {
            if (root == null)
            {
                yield break;
            }
            yield return root;
            foreach (System.Windows.Forms.Control child in root.Controls)
            {
                foreach (System.Windows.Forms.Control nested in EnumerateControls(child))
                {
                    yield return nested;
                }
            }
        }

        /// <summary>
        /// <para>说明：获取报表明细</para>
        /// <para>创建人：龚宇超</para>
        /// <para>创建日期：2017-11-22 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <returns>List&lt;GridDetailModel&gt;.</returns>
        private List<GridDetailModel> GetReportDetails()
        {
            List<GridDetailModel> details = new List<GridDetailModel>();

            DataTable table = ReportImpl.GetReportDetailPages(Model.ModuleCode);
            foreach (DataRow item in table.Rows)
            {
                DataTable gridColumns = ReportImpl.GetReportDetailColumns(Model.ModuleCode, item["id"] + "");
                details.Add(new GridDetailModel(item, gridColumns, GridCustomColumnStruct.BaseDetailGridView));
            }

            return details;
        }


        /// <summary>
        /// 获取数据源缓存
        /// </summary>
        /// <param name="cachesDic"></param>
        public void GetDataCaches(Dictionary<object, Hashtable> cachesDic)
        {
            //全局数据
            Task<DynamicModel> dynamicModelTask = cachesDic.AddTask(this, "DynamicModel", new Task<DynamicModel>(() =>
            {
                return Model;//动态链接库对象
            }));
            Task<DataRow> systemDllRowTask = cachesDic.AddTask(this, "SystemDllRow", new Task<DataRow>(() =>
            {
                return MainImpl.GetSystemdllTab(Model.ModuleCode);//获取单个模块信息
            }));
            Task<ModuleModel> sysModelTask = cachesDic.AddTask(this, "SysModel", new Task<ModuleModel>(() =>
            {
                ModuleModel sysModel = new ModuleModel(systemDllRowTask.Result);
                return sysModel;//系统模块实体对象
            }));
            Task<List<GridDetailModel>> detailTask = cachesDic.AddTask(this, "Details", new Task<List<GridDetailModel>>(() =>
            {
                DataTable detailPages = ReportImpl.GetReportDetailPages(Model.ModuleCode);//
                List<GridDetailModel> details = new List<GridDetailModel>();//表格明细对象的集合
                foreach (DataRow item in detailPages.Rows)
                {
                    GridDetailModel gridDetailModel = new GridDetailModel(item, null, GridCustomColumnStruct.BaseDetailGridView);
                    details.Add(gridDetailModel);
                    Task<DataTable> addGridColumnsTask = cachesDic.AddTask(gridDetailModel, "GridColumns", new Task<DataTable>(() =>
                    {
                        DataTable gridColumns = ReportImpl.GetReportDetailColumns(Model.ModuleCode, item["id"] + "");//获取报表明细列
                        gridDetailModel.GridColumns = gridColumns;
                        return gridColumns;
                    }));
                }
                return details;
            }));
            Task<int> formTypeTask = cachesDic.AddTask(this, "FormType", new Task<int>(() =>
            {
                return BaseImpl.GetBaseType(Model.ModuleCode);
            }));
            Task<string> privilegeTask = cachesDic.AddTask(this, "Privilege", new Task<string>(() =>
            {
                return Model.Privilege.Equals("3") ? "1" : Model.ModuleId > 0 ? BaseImpl.GetUserPurviewsByMenuId(Model.ModuleId + "") + "" : BaseImpl.GetUserPurviewsByMenuCode(Model.ModuleCode) + "";// 权限(1.有操作权限.0.无权限.2.只读权限.3.右键配置权限全部开放)
            }));
            //添加数据到mControl
            cachesDic.AddTask(mControl, "DynamicModel", dynamicModelTask);
            cachesDic.AddTask(mControl, "SystemDllRow", systemDllRowTask);
            cachesDic.AddTask(mControl, "SysModel", sysModelTask);
            cachesDic.AddTask(mControl, "Details", detailTask);
            //获取mControl控件的数据
            mControl.GetDataCaches(cachesDic);
        }



    }
}