using FastReport.Controls;
using FastReport.Data;
using FastReport.Forms;
using FastReport.Utils;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Reflection;
using System.Text;
using System.Windows.Forms;

namespace FastReport.Design.ToolWindows
{
    /// <summary>
    /// Represents the "Data Dictionary" window.
    /// </summary>
    public class DictionaryWindow : FilterableToolWindow
    {
        #region Fields
        private ToolbarDropDownButton btnActions;
        private ToolbarButton btnEdit;
        private ToolbarButton btnDelete;
        private ToolbarButton btnView;
        private ContextMenuItem miNew;
        private ContextMenuItem miOpen;
        private ContextMenuItem miMerge;
        private ContextMenuItem miSave;
        private ContextMenuItem miChooseData;
        private ContextMenuItem miSortDataSources;
        private ContextMenuItem miUploadDataSource;
        private ContextMenuItem miNewDataSource;
        private ContextMenuItem miNewRelation;
        private ContextMenuItem miNewParameter;
        private ContextMenuItem miNewTotal;
        private ContextMenuItem miNewCalculatedColumn;
        private ContextMenuItem miCopyDataSource;

        private ContextMenuBase mnuContext;
        private ContextMenuItem miSortDataSources1;
        private ContextMenuItem miUploadDataSource1;
        private ContextMenuItem miNewDataSource1;
        private ContextMenuItem miNewParameter1;
        private ContextMenuItem miNewTotal1;
        private ContextMenuItem miNewCalculatedColumn1;
        private ContextMenuItem miRename;
        private ContextMenuItem miEdit;
        private ContextMenuItem miDelete;
        private ContextMenuItem miDeleteAlias;
        private ContextMenuItem miView;
        private ContextMenuItem miViewJson;
        private ContextMenuItem miSortDataFields;

        private Panel dragIndicator;
        private Splitter splitter;
        private DescriptionControl lblDescription;
        private Report report;
        private List<string> expandedNodes;
        private bool updating;
        private static DraggedItemCollection draggedItems = new DraggedItemCollection();
        #endregion

        #region Properties
        private bool IsDataComponent
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag is DataComponentBase; }
        }

        private bool IsVariable
        {
            get
            {
                return tree.SelectedNode != null && tree.SelectedNode.Tag is Parameter &&
                  !(tree.SelectedNode.Parent.Tag is SystemVariables);
            }
        }

        private bool IsTotal
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag is Total; }
        }

        private bool IsConnection
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag is DataConnectionBase; }
        }

        private bool IsTable
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag is DataSourceBase; }
        }

        private bool IsJsonTable
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag is FastReport.Data.JsonConnection.JsonTableDataSource; }
        }

        private bool IsRelation
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag is Relation; }
        }

        private bool IsEditableColumn
        {
            get
            {
                TreeNode node = tree.SelectedNode;
                bool result = node != null && node.Tag is Column;
                if (result)
                {
                    // check if column belongs to the datasource, not relation.
                    while (node != null)
                    {
                        if (node.Tag is Relation)
                        {
                            result = false;
                            break;
                        }
                        else if (node.Tag is DataSourceBase)
                            break;

                        node = node.Parent;
                    }
                }

                return result;
            }
        }

        private bool IsCube
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag is CubeSourceBase; }
        }

        private bool IsDataSources
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag == report.Dictionary.DataSources; }
        }

        private bool IsVariables
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag == report.Dictionary.Parameters; }
        }

        private bool IsSystemVariables
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag == report.Dictionary.SystemVariables; }
        }

        private bool IsTotals
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag == report.Dictionary.Totals; }
        }

        private bool IsCubeSources
        {
            get { return tree.SelectedNode != null && tree.SelectedNode.Tag == report.Dictionary.CubeSources; }
        }

        private bool CanEdit
        {
            get
            {
                return (IsDataComponent || IsVariable || IsTotal) &&
                  !Designer.Restrictions.DontEditData &&
                  (tree.SelectedNode.Tag as Base).HasFlag(Flags.CanEdit) &&
                  !(tree.SelectedNode.Tag as Base).HasRestriction(Restrictions.DontEdit);
            }
        }

        private bool CanDelete
        {
            get
            {
                return (IsDataComponent || IsVariable || IsTotal) &&
                  !Designer.Restrictions.DontEditData &&
                  (tree.SelectedNode.Tag as Base).HasFlag(Flags.CanDelete) &&
                  !(tree.SelectedNode.Tag as Base).HasRestriction(Restrictions.DontDelete);
            }
        }

        private bool CanCreateCalculatedColumn
        {
            get
            {
                return tree.SelectedNode != null && tree.SelectedNode.Tag is DataSourceBase;
            }
        }

        private bool IsAliased
        {
            get
            {
                return tree.SelectedNode != null && tree.SelectedNode.Tag is DataComponentBase &&
                  (tree.SelectedNode.Tag as DataComponentBase).IsAliased;
            }
        }
        #endregion

        #region Private Methods
        private TreeNode FindNode(TreeNodeCollection parent, string text)
        {
            foreach (TreeNode node in parent)
            {
                if (node.Text == text)
                    return node;
            }
            return null;
        }

        private void NavigateTo(string path)
        {
            string[] parts = path.Split('.');
            TreeNodeCollection parent = tree.Nodes;
            TreeNode node = null;
            foreach (string part in parts)
            {
                node = FindNode(parent, part);
                if (node == null)
                    break;
                node.Expand();
                parent = node.Nodes;
            }
            tree.SelectedNode = node;
        }

        private void GetExpandedNodes(TreeNodeCollection nodes)
        {
            foreach (TreeNode node in nodes)
            {
                if (node.IsExpanded)
                    expandedNodes.Add(node.FullPath);
                GetExpandedNodes(node.Nodes);
            }
        }

        private bool CompareNodes(TreeNodeCollection fromNodes, TreeNodeCollection toNodes)
        {
            if (fromNodes.Count != toNodes.Count)
                return false;
            for (int i = 0; i < fromNodes.Count; i++)
            {
                if (fromNodes[i].Text != toNodes[i].Text || fromNodes[i].ImageIndex != toNodes[i].ImageIndex)
                    return false;
                toNodes[i].Tag = fromNodes[i].Tag;
                if (!CompareNodes(fromNodes[i].Nodes, toNodes[i].Nodes))
                    return false;
            }
            return true;
        }

        private void CopyNodes(TreeNodeCollection fromNodes, TreeNodeCollection toNodes)
        {
            foreach (TreeNode fromNode in fromNodes)
            {
                TreeNode toNode = toNodes.Add(fromNode.Text);
                toNode.Tag = fromNode.Tag;
                toNode.ImageIndex = fromNode.ImageIndex;
                toNode.SelectedImageIndex = fromNode.SelectedImageIndex;
                CopyNodes(fromNode.Nodes, toNode.Nodes);
                if (expandedNodes.Contains(fromNode.FullPath))
                    toNode.Expand();
            }
        }

        protected override void UpdateTree()
        {
            expandedNodes.Clear();
            GetExpandedNodes(tree.Nodes);

            TreeView buffer = new TreeView();
            if (report != null)
            {
                bool canShowData = report.Dictionary.Connections.Count > 0;
                foreach (DataSourceBase data in report.Dictionary.DataSources)
                {
                    if (data.Enabled)
                    {
                        canShowData = true;
                        break;
                    }
                }

                bool canShowCube = report.Dictionary.CubeSources.Count > 0;

                TreeNode rootNode = null;
                if (canShowData)
                {
                    rootNode = buffer.Nodes.Add(Res.Get("Designer,ToolWindow,Dictionary,DataSources"));
                    rootNode.Tag = report.Dictionary.DataSources;
                    rootNode.ImageIndex = 53;
                    rootNode.SelectedImageIndex = rootNode.ImageIndex;
                    DataTreeHelper.CreateDataTree(report.Dictionary, rootNode.Nodes, true, true, true, true);
                }

                // system variables
                rootNode = buffer.Nodes.Add(Res.Get("Designer,ToolWindow,Dictionary,SystemVariables"));
                rootNode.Tag = report.Dictionary.SystemVariables;
                rootNode.ImageIndex = 60;
                rootNode.SelectedImageIndex = rootNode.ImageIndex;
                DataTreeHelper.CreateVariablesTree(report.Dictionary.SystemVariables, rootNode.Nodes);

                // totals
                rootNode = buffer.Nodes.Add(Res.Get("Designer,ToolWindow,Dictionary,Totals"));
                rootNode.Tag = report.Dictionary.Totals;
                rootNode.ImageIndex = 132;
                rootNode.SelectedImageIndex = rootNode.ImageIndex;
                DataTreeHelper.CreateTotalsTree(report.Dictionary.Totals, rootNode.Nodes);

                // parameters
                rootNode = buffer.Nodes.Add(Res.Get("Designer,ToolWindow,Dictionary,Parameters"));
                rootNode.Tag = report.Dictionary.Parameters;
                rootNode.ImageIndex = 234;
                rootNode.SelectedImageIndex = rootNode.ImageIndex;
                DataTreeHelper.CreateParametersTree(report.Dictionary.Parameters, rootNode.Nodes);

                // functions
                rootNode = buffer.Nodes.Add(Res.Get("Designer,ToolWindow,Dictionary,Functions"));
                rootNode.ImageIndex = 52;
                rootNode.SelectedImageIndex = rootNode.ImageIndex;
                DataTreeHelper.CreateFunctionsTree(report, rootNode.Nodes);

                if (canShowCube)
                {
                    rootNode = buffer.Nodes.Add(Res.Get("Designer,ToolWindow,Dictionary,CubeSources"));
                    rootNode.Tag = report.Dictionary.CubeSources;
                    rootNode.ImageIndex = 248;
                    rootNode.SelectedImageIndex = rootNode.ImageIndex;
                    DataTreeHelper.CreateCubeTree(report.Dictionary, rootNode.Nodes, false);
                }
            }

            if (!CompareNodes(buffer.Nodes, tree.Nodes))
            {
                tree.BeginUpdate();
                tree.Nodes.Clear();
                CopyNodes(buffer.Nodes, tree.Nodes);
                tree.EndUpdate();
            }

            buffer.Dispose();
            UpdateControls();
        }

        private void Change()
        {
            Designer.SetModified(this, "EditData");
        }

        private void UpdateControls()
        {
            btnEdit.Enabled = CanEdit;
            btnDelete.Enabled = CanDelete;
            btnView.Enabled = IsTable && !IsJsonTable;
        }

        private void miNew_Click(object sender, EventArgs e)
        {
            report.Dictionary.Clear();
            report.Dictionary.ReRegisterData();
            UpdateTree();
            Change();
#if !WPF
            SearchMatches();
#endif
        }

        private void miOpen_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog dialog = new OpenFileDialog())
            {
                dialog.Filter = Res.Get("FileFilters,Dictionary");
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    report.Dictionary.Load(dialog.FileName);
                    UpdateTree();
                    Change();
#if !WPF
                    SearchMatches();
#endif
                }
            }
        }

        private void miSave_Click(object sender, EventArgs e)
        {
            using (SaveFileDialog dialog = new SaveFileDialog())
            {
                dialog.Filter = Res.Get("FileFilters,Dictionary");
                dialog.DefaultExt = "frd";
                dialog.FileName = "Dictionary.frd";
                if (dialog.ShowDialog() == DialogResult.OK)
                    report.Dictionary.Save(dialog.FileName);
            }
        }

        private void miMerge_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog dialog = new OpenFileDialog())
            {
                dialog.Filter = Res.Get("FileFilters,Dictionary");
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    Dictionary dict = new Dictionary();
                    dict.SetReport(report);
                    dict.Load(dialog.FileName);
                    foreach (Base obj in dict.AllObjects)
                    {
                        obj.SetReport(report);
                    }
                    report.Dictionary.Merge(dict);
                    UpdateTree();
                    Change();
#if !WPF
                    SearchMatches();
#endif
                }
            }
        }

        private void btnActions_DropDownOpening(object sender, EventArgs e)
        {
            miNew.Enabled = Designer.cmdChooseData.Enabled;
            miOpen.Enabled = Designer.cmdChooseData.Enabled;
            miMerge.Enabled = Designer.cmdChooseData.Enabled;
            miSave.Enabled = Designer.cmdChooseData.Enabled;
            miChooseData.Enabled = Designer.cmdChooseData.Enabled;
            miSortDataSources.Enabled = Designer.cmdSortDataSources.Enabled;
            miUploadDataSource.Enabled = IsConnection;
            miNewDataSource.Enabled = Designer.cmdAddData.Enabled;
            miNewRelation.Enabled = Designer.cmdChooseData.Enabled;
            miNewParameter.Enabled = Designer.cmdChooseData.Enabled;
            miNewTotal.Enabled = Designer.cmdChooseData.Enabled;
            miNewCalculatedColumn.Enabled = Designer.cmdChooseData.Enabled && CanCreateCalculatedColumn;
        }

        private void mnuContext_Opening(object sender, CancelEventArgs e)
        {
            mnuContext.Clear();
            if (!Designer.cmdChooseData.Enabled)
            {
                e.Cancel = true;
                return;
            }

            if (IsDataSources || IsConnection)
            {
                if (Designer.cmdAddData.Enabled)
                    mnuContext.AddItem(miNewDataSource1);
                if (Designer.cmdSortDataSources.Enabled)
                    mnuContext.AddItem(miSortDataSources1);

                if (IsConnection)
                {
                    mnuContext.AddItem(miCopyDataSource);
                    if (!string.IsNullOrEmpty((tree.SelectedNode.Tag as DataConnectionBase).CloudId))
                        miUploadDataSource.Text = Res.Get("Designer,ToolWindow,Dictionary,UploadChangesDataSource");
                    else
                        miUploadDataSource.Text = Res.Get("Designer,ToolWindow,Dictionary,UploadDataSource");
                    mnuContext.AddItem(miUploadDataSource1);
                }
            }
            else if (IsVariables || IsVariable)
                mnuContext.AddItem(miNewParameter1);
            else if (IsTotals || IsTotal)
                mnuContext.AddItem(miNewTotal1);
            else if (CanCreateCalculatedColumn)
            {
                mnuContext.AddItem(miNewCalculatedColumn1);
                miNewCalculatedColumn.Enabled = true;
            }

            if (CanEdit)
                mnuContext.AddItem(miEdit);
            if (IsTable || IsEditableColumn || IsVariable || IsTotal)
                mnuContext.AddItem(miRename);
            if (CanDelete)
                mnuContext.AddItem(miDelete);
            if (IsAliased)
                mnuContext.AddItem(miDeleteAlias);
            if (IsTable || IsJsonTable)
            {
                mnuContext.AddItem(IsJsonTable ? miViewJson : miView);

                DataSourceBase data = tree.SelectedNode.Tag as DataSourceBase;
                if (data != null && data.Columns.Count > 1)
                {
                    mnuContext.AddItem(miSortDataFields);
                }
            }

            // .Net: update menu item images
            mnuContext.ImageList = Designer.GetImages();
            e.Cancel = mnuContext.IsEmpty;
        }

        private void miNewRelation_Click(object sender, EventArgs e)
        {
            Relation relation = new Relation();
            report.Dictionary.Relations.Add(relation);
            using (RelationEditorForm form = new RelationEditorForm(relation))
            {
                if (form.ShowDialog() == DialogResult.OK)
                {
                    relation.Name = report.Dictionary.CreateUniqueName(relation.ParentDataSource.Name + "_" +
                      relation.ChildDataSource.Name);
                    UpdateTree();
                    Change();
#if !WPF
                    SearchMatches();
#endif
                }
                else
                    relation.Dispose();
            }
        }

        private void miNewCalculatedColumn_Click(object sender, EventArgs e)
        {
            DataSourceBase data = tree.SelectedNode.Tag as DataSourceBase;
            Column c = new Column();
            c.Name = data.Columns.CreateUniqueName("Column");
            c.Alias = data.Columns.CreateUniqueAlias(c.Alias);
            c.Calculated = true;
            data.Columns.Add(c);

            UpdateTree();
            string navigatePath = Res.Get("Designer,ToolWindow,Dictionary,DataSources");
            if (data.Parent is DataConnectionBase)
                navigatePath += "." + data.Parent.Name + "." + data.Alias;
            else
                navigatePath += GetPath(data);

            navigatePath += "." + c.Alias;
            NavigateTo(navigatePath);
            Change();
#if !WPF
            SearchMatches();
#endif
        }

        private string GetPath(Base data)
        {
            if (data == null || data.Name == "")
                return "";

            if (data.Parent is DataConnectionBase && data.Parent.Parent == null)
                return data.Parent.Alias;
            else
                return GetPath(data.Parent) + "." + data.Name;
        }

        private void miNewParameter_Click(object sender, EventArgs e)
        {
            Parameter p = new Parameter();
            ParameterCollection parent = null;
            if (IsVariable)
                parent = (tree.SelectedNode.Tag as Parameter).Parameters;
            else
                parent = report.Dictionary.Parameters;

            p.Name = parent.CreateUniqueName("Parameter");
            parent.Add(p);
            UpdateTree();
            NavigateTo(Res.Get("Designer,ToolWindow,Dictionary,Parameters") + "." + p.FullName);
            Change();
#if !WPF
            SearchMatches();
#endif
        }

        private void miNewTotal_Click(object sender, EventArgs e)
        {
            using (TotalEditorForm form = new TotalEditorForm(Designer))
            {
                if (form.ShowDialog() == DialogResult.OK)
                {
                    report.Dictionary.Totals.Add(form.Total);
                    UpdateTree();
                    NavigateTo(Res.Get("Designer,ToolWindow,Dictionary,Totals") + "." + form.Total.Name);
                    Change();
#if !WPF
                    SearchMatches();
#endif
                }
            }
        }

        private void miRename_Click(object sender, EventArgs e)
        {
            if (tree.SelectedNode == null)
                return;
            tree.SelectedNode.BeginEdit();
        }

        private void miEdit_Click(object sender, EventArgs e)
        {
            if (!CanEdit)
                return;

            IHasEditor c = tree.SelectedNode.Tag as IHasEditor;
            if (c != null && c.InvokeEditor())
            {
                UpdateTree();
                Change();
#if !WPF
                SearchMatches();
#endif
            }
        }

        private void miDelete_Click(object sender, EventArgs e)
        {
            TreeNode parentNode = tree.SelectedNode?.Parent;
            if (parentNode == null)
                return;

            int index = parentNode.Nodes.IndexOf(tree.SelectedNode);

            for (int i = 0; i < tree.SelectedNodes.Count; i++)
            {
                if (CanDelete)
                {
                    (tree.SelectedNode.Tag as Base).Delete();
                    tree.SelectedNode.Remove();
                    tree.SelectedNodes.RemoveAt(0);
                    i--;
                }
            }

            index = Math.Min(index, parentNode.Nodes.Count - 1);
            tree.SelectedNode = index >= 0 ? parentNode.Nodes[index] : null;
            Change();
        }

        private void miDeleteAlias_Click(object sender, EventArgs e)
        {
            if (!IsAliased)
                return;
            DataComponentBase c = tree.SelectedNode.Tag as DataComponentBase;
            c.Alias = c.Name;
            tree.SelectedNode.Text = c.Name;
            Change();
        }

        private void miView_Click(object sender, EventArgs e)
        {
            if (!IsTable)
                return;

            DataSourceBase data = tree.SelectedNode.Tag as DataSourceBase;
            if (data == null)
                return;

            try
            {
                data.Init();
            }
            catch (Exception ex)
            {
                FRMessageBox.Error(ex.Message);
                return;
            }

            object dataSource = null;
            if (data is TableDataSource)
            {
                dataSource = (data as TableDataSource).Table;
            }
            else
                dataSource = data.Rows;
            if (dataSource == null)
                return;

            using (DataViewForm form = new DataViewForm(data))
            {
                form.ShowDialog();
            }
        }

        private void miViewJson_Click(object sender, EventArgs e)
        {
            if (!IsJsonTable)
                return;

            Data.JsonConnection.JsonTableDataSource data = tree.SelectedNode.Tag as Data.JsonConnection.JsonTableDataSource;
            if (data == null)
                return;

            try
            {
                data.Init();
            }
            catch (Exception ex)
            {
                FRMessageBox.Error(ex.Message);
                return;
            }

            using (JsonEditorForm jsonEditorForm = new JsonEditorForm())
            {
                StringBuilder sb = new StringBuilder();
                data.Json.WriteTo(sb, 2);
                jsonEditorForm.JsonText = sb.ToString();
                jsonEditorForm.SetToReadOnly();
                jsonEditorForm.ShowDialog();
            }
        }

        private void miUploadDataSource_Click(object sender, EventArgs e)
        {
            if (tree.SelectedNode.Tag is DataConnectionBase data)
                CloudCommands.UploadDataConnection(data);
        }

        private void miCopyDataSource_Click(object sender, EventArgs e)
        {
            if (tree.SelectedNode.Tag is DataConnectionBase)
            {
                DataConnectionBase data = tree.SelectedNode.Tag as DataConnectionBase;
                data.Clone();
            }
            Change();
            UpdateTree();
            Refresh();
            //Designer.SetModified();
#if !WPF
            SearchMatches();
#endif
        }

        private void miSortDataFields_Click(object sender, EventArgs e)
        {
            if (!IsTable)
                return;

            TableDataSource data = tree.SelectedNode.Tag as TableDataSource;
            if (data == null)
                return;

            if (data.Columns.Count > 1)
            {
                data.Columns.Sort();
                UpdateTree();
                Change();
#if !WPF
                SearchMatches();
#endif
            }
        }

        private void tree_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter || e.KeyCode == Keys.F2)
                miRename_Click(this, null);
            else if (e.KeyCode == Keys.Delete)
                miDelete_Click(this, null);
        }

        private void tree_SelectionChanged(object sender, EventArgs e)
        {
            if (updating)
                return;

            Designer.SelectedObjects.Clear();
            foreach (var node in tree.SelectedNodes)
            {
                if (node.Tag is Base c)
                    Designer.SelectedObjects.Add(c);
            }
            Designer.SelectionChanged(this);
            UpdateControls();

            object selected = tree.SelectedNode?.Tag;
            bool descrVisible = selected is MethodInfo || selected is SystemVariable;
            splitter.Visible = descrVisible;
            lblDescription.Visible = descrVisible;

            if (descrVisible)
                lblDescription.ShowDescription(report, selected);
        }

        private void tree_RightMouseButtonClicked(object sender, MouseEventArgs e)
        {
            mnuContext.Show(tree, e.Location);
        }

        private void tree_BeforeLabelEdit(object sender, NodeLabelEditEventArgs e)
        {
            bool canEdit = (IsTable || IsEditableColumn || IsVariable || IsTotal) &&
              !Designer.Restrictions.DontEditData &&
              !(tree.SelectedNode.Tag as Base).HasRestriction(Restrictions.DontModify);

            if (!canEdit)
                e.CancelEdit = true;
        }

        private void tree_AfterLabelEdit(object sender, NodeLabelEditEventArgs e)
        {
            string newLabel = e.Label == null ? tree.SelectedNode.Text : e.Label;
            if (newLabel == tree.SelectedNode.Text)
                return;

            Base obj = tree.SelectedNode.Tag as Base;
            bool duplicateName = false;

            if (obj is DataSourceBase)
            {
                if (report.Dictionary.FindByAlias(newLabel) != null)
                    duplicateName = true;
                else
                {
                    (obj as DataSourceBase).Alias = newLabel;
                }
            }
            else if (obj is Column)
            {
                // get column name, take parent columns into account
                string columnName = newLabel;
                TreeNode node = tree.SelectedNode;
                while (true)
                {
                    node = node.Parent;
                    if (node.Tag is DataSourceBase)
                        break;
                    columnName = node.Text + "." + columnName;
                }

                DataSourceBase data = obj.Parent as DataSourceBase;
                if (data.Columns.FindByAlias(columnName) != null)
                    duplicateName = true;
                else
                    (obj as Column).Alias = columnName;
            }
            else if (obj is Parameter)
            {
                TreeNode parentNode = tree.SelectedNode.Parent;
                ParameterCollection parent = null;
                if (parentNode.Tag is Parameter)
                    parent = (parentNode.Tag as Parameter).Parameters;
                else
                    parent = report.Dictionary.Parameters;

                if (parent.FindByName(newLabel) != null)
                    duplicateName = true;
                else
                    obj.Name = newLabel;
            }
            else if (obj is Total)
            {
                if (report.Dictionary.FindByName(newLabel) != null)
                    duplicateName = true;
                else
                    obj.Name = newLabel;
            }

            if (duplicateName)
            {
                e.CancelEdit = true;
                FRMessageBox.Error(Res.Get("Designer,ToolWindow,Dictionary,DuplicateName"));
            }
            else
                Change();
        }

        private void tree_ItemDrag(object sender, ItemDragEventArgs e)
        {
            draggedItems.Clear();

            foreach (TreeNode n in tree.SelectedNodes)
            {
                string selectedItem = "";
                TreeNode node = n;

                if (node == null)
                    continue;

                if (node.Tag is Column && !(node.Tag is DataSourceBase))
                {
                    while (true)
                    {
                        if (node.Tag is DataSourceBase)
                        {
                            selectedItem = (node.Tag as DataSourceBase).FullName + "." + selectedItem;
                            break;
                        }
                        selectedItem = node.Text + (selectedItem == "" ? "" : ".") + selectedItem;
                        node = node.Parent;
                    }
                }
                else if (node.Tag is Parameter || node.Tag is Total)
                {
                    while (node != null && node.Tag != null)
                    {
                        if (node.Tag is Parameter || node.Tag is Total)
                            selectedItem = node.Text + (selectedItem == "" ? "" : ".") + selectedItem;
                        node = node.Parent;
                    }
                }
                else if (node.Tag is MethodInfo)
                {
                    MethodInfo info = node.Tag as MethodInfo;
                    ParameterInfo[] pars = info.GetParameters();
                    int parsLength = pars.Length;
                    if (parsLength > 0 && pars[0].Name == "thisReport")
                        parsLength--;

                    selectedItem = info.Name + "(" + (parsLength > 1 ? "".PadRight(parsLength - 1, ',') : "") + ")";
                }

                if (selectedItem != "")
                    draggedItems.Add(new DraggedItem(n.Tag, selectedItem));
            }

            if (draggedItems.Count > 0)
                tree.DoDragDrop(draggedItems, DragDropEffects.Move);
            else
                tree.DoDragDrop(e.Item, DragDropEffects.None);
        }

        private void tree_DragOver(object sender, DragEventArgs e)
        {
            dragIndicator.Hide();

            if (draggedItems.Count == 0)
                return;

            var pos = tree.PointToClient(new Point(e.X, e.Y));
            TreeNode targetNode = tree.GetNodeAt(pos);
            if (targetNode == null)
                return;

            object target = targetNode.Tag;

            // the only thing that can be dragged around the DictionaryWindow is a report parameter
            // allowed moves are:
            // - target is ParameterCollection: add node to collection or set its z-order to 0 if node is in collection already
            // - target is Parameter and dragged is not target and is not a root of target: reparent or change z-order (see notes below)

            // additional check is required against SystemVariable(s) because they are subclasses of Parameter/ParameterCollection
            if (target is SystemVariable || target is SystemVariables)
                return;

            int allow = 0;

            foreach (DraggedItem draggedItem in draggedItems)
            {
                object dragged = draggedItem.obj;
                if (dragged is Parameter dr && !(dragged is SystemVariable))
                {
                    if (target is ParameterCollection ||
                        (target is Parameter tr && target != dragged && !tr.HasParent(dr)))
                    {
                        allow++;
                    }
                }
            }

            if (allow != 0 && allow == draggedItems.Count)
            {
                e.Effect = e.AllowedEffect;

                // check cursor position: less than 1/3 of target node width => change z-order, else change parent
                int _20 = Designer.LogicalToDevice(20);
                Rectangle dragRect = target is Parameter && pos.X < targetNode.Bounds.X + targetNode.Bounds.Width / 3 ?
                    new Rectangle(_20, targetNode.Bounds.Top, tree.Width - _20 * 2, 0) :
                    new Rectangle(targetNode.Bounds.Left, targetNode.Bounds.Bottom, targetNode.Bounds.Width, 0);
                dragIndicator.BackColor = tree.ForeColor;
                dragIndicator.SetBounds(tree.Left + dragRect.Left, tree.Top + dragRect.Top, dragRect.Width, Designer.LogicalToDevice(2));
                dragIndicator.Show();
            }
        }

        private void tree_DragDrop(object sender, DragEventArgs e)
        {
            dragIndicator.Hide();

            if (draggedItems.Count == 0)
                return;

            var pos = tree.PointToClient(new Point(e.X, e.Y));
            TreeNode targetNode = tree.GetNodeAt(pos);
            if (targetNode == null)
                return;

            object target = targetNode.Tag;
            if (target is SystemVariable || target is SystemVariables)
                return;

            string draggedName = "";
            foreach (DraggedItem draggedItem in draggedItems)
            {
                Parameter dragged = draggedItem.obj as Parameter;
                if (dragged == null || dragged is SystemVariable)
                    continue;

                if (target is ParameterCollection collection)
                {
                    if (collection.IndexOf(dragged) == -1)
                    {
                        FixParameterName(dragged, collection);
                        collection.Add(dragged);
                    }
                }
                else if (target is Parameter targetPar)
                {
                    if (pos.X < targetNode.Bounds.X + targetNode.Bounds.Width / 3)
                    {
                        // insert dragged before target
                        dragged.ParentCollection.Remove(dragged);
                        var targetParentCollection = targetPar.ParentCollection;
                        FixParameterName(dragged, targetParentCollection);
                        targetParentCollection.Insert(targetParentCollection.IndexOf(targetPar), dragged);
                    }
                    else
                    {
                        if (targetPar.Parameters.IndexOf(dragged) == -1)
                        {
                            FixParameterName(dragged, targetPar.Parameters);
                            dragged.Parent = targetPar;
                        }
                    }
                }

                draggedName = dragged.FullName;
            }

            // update all designer plugins (this one too)
            Designer.SetModified(null, "EditData");
            NavigateTo(Res.Get("Designer,ToolWindow,Dictionary,Parameters") + "." + draggedName);
        }

        private void tree_DragLeave(object sender, EventArgs e)
        {
            dragIndicator.Hide();
        }

        private void FixParameterName(Parameter p, ParameterCollection coll)
        {
            p.Name = coll.CreateUniqueName(p.Name);
        }

        #endregion

        #region Public Methods
        /// <inheritdoc/>
        public override void SelectionChanged()
        {
            base.SelectionChanged();
            if (Designer.SelectedObjects.Count == 0 || Designer.SelectedObjects[0] is ComponentBase)
            {
                updating = true;
                tree.SelectedNode = null;
                updating = false;
                UpdateControls();
            }
        }

        /// <inheritdoc/>
        public override void UpdateContent()
        {
            report = Designer.ActiveReport;
            Throttle.Execute(() =>
            {
                UpdateTree();
                // to save search results in DataTree when changing ReportTree
#if !WPF
                SearchMatches();
#endif
            });
        }

        /// <inheritdoc/>
        public override void Localize()
        {
            base.Localize();
            MyRes res = new MyRes("Designer,ToolWindow,Dictionary");

            Text = res.Get("");
            btnActions.Text = Res.Get("Buttons,Actions");
            btnEdit.ToolTipText = res.Get("Edit");
            btnDelete.ToolTipText = res.Get("Delete");
            btnView.ToolTipText = res.Get("View");
            miNew.Text = res.Get("New");
            miOpen.Text = res.Get("Open");
            miMerge.Text = res.Get("Merge");
            miSave.Text = res.Get("Save");
            miChooseData.Text = Res.Get("Designer,Menu,Data,Choose");
            miNewDataSource.Text = miNewDataSource1.Text = res.Get("NewDataSource");
            miSortDataSources.Text = miSortDataSources1.Text = res.Get("SortDataSources");
            miNewRelation.Text = res.Get("NewRelation");
            miNewParameter.Text = miNewParameter1.Text = res.Get("NewParameter");
            miNewTotal.Text = miNewTotal1.Text = res.Get("NewTotal");
            miNewCalculatedColumn.Text = miNewCalculatedColumn1.Text = res.Get("NewCalculatedColumn");
            miRename.Text = res.Get("Rename");
            miEdit.Text = res.Get("Edit");
            miDelete.Text = res.Get("Delete");
            miDeleteAlias.Text = res.Get("DeleteAlias");
            miView.Text = res.Get("View");
            miViewJson.Text = res.Get("ViewJson");
            miSortDataFields.Text = res.Get("SortDataFields");
            miCopyDataSource.Text = res.Get("CopyDataSource");
            miUploadDataSource.Text = miUploadDataSource1.Text = res.Get("UploadDataSource");

            UpdateTree();
        }

        /// <inheritdoc/>
        public override void UpdateUIStyle()
        {
            base.UpdateUIStyle();
            mnuContext.UpdateUIStyle();
            splitter.BackColor = UIStyleUtils.GetControlColor(Designer.UIStyle);
        }

        /// <inheritdoc/>
        public override void UpdateDpiDependencies()
        {
            base.UpdateDpiDependencies();
            Image = Designer.GetImage(72);
            tree.ImageList = mnuContext.ImageList = Designer.GetImages();
            mnuContext.Font = btnActions.Font = Designer.LogicalToDevice(DrawUtils.DefaultFont);
            btnActions.UpdateDpiDependencies(Designer);
        }

        /// <inheritdoc/>
        public override void SaveState()
        {
            base.SaveState();
            Storage.SetDip("DescriptionHeight", lblDescription.Height);
        }

        /// <inheritdoc/>
        public override void RestoreState()
        {
            base.RestoreState();
            lblDescription.Height = Storage.GetDip("DescriptionHeight", 50, 50, 200);
        }

        #endregion

        /// <summary>
        /// Initializes a new instance of the <see cref="DictionaryWindow"/> class with default settings.
        /// </summary>
        /// <param name="designer">The report designer.</param>
        public DictionaryWindow(Designer designer)
            : base(designer)
        {
            Name = "DictionaryWindow";

            btnActions = new ToolbarDropDownButton("", -1, btnActions_DropDownOpening);
            btnEdit = AddButton(68, miEdit_Click);
            btnDelete = AddButton(51, miDelete_Click);
            btnView = AddButton(54, miView_Click);
            toolbar.Items.Insert(0, btnActions);
            toolbar.Items.Insert(1, btnEdit);
            toolbar.Items.Insert(2, btnDelete);
            toolbar.Items.Insert(3, btnView);

            miNew = AddMenuItem(0, miNew_Click);
            miOpen = AddMenuItem(1, miOpen_Click);
            miMerge = AddMenuItem(miMerge_Click);
            miSave = AddMenuItem(2, miSave_Click);
            miChooseData = AddMenuItem(Designer.cmdChooseData.Invoke);
            miChooseData.BeginGroup = true;
            miSortDataSources = AddMenuItem(Designer.cmdSortDataSources.Invoke);
            miUploadDataSource = AddMenuItem(264, miUploadDataSource_Click);

            miNewDataSource = AddMenuItem(137, Designer.cmdAddData.Invoke);
            miNewDataSource.BeginGroup = true;
            miNewRelation = AddMenuItem(139, miNewRelation_Click);
            miNewCalculatedColumn = AddMenuItem(55, miNewCalculatedColumn_Click);
            miNewParameter = AddMenuItem(56, miNewParameter_Click);
            miNewTotal = AddMenuItem(65, miNewTotal_Click);
            btnActions.AddDropDownItems(
                miNew, miOpen, miMerge, miSave,
                miChooseData, miSortDataSources,
#if !COMMUNITY
                miUploadDataSource,
#endif
                miNewDataSource, miNewRelation, miNewCalculatedColumn, miNewParameter, miNewTotal);

            mnuContext = new ContextMenuBase(designer);
            miSortDataSources1 = AddMenuItem(Designer.cmdSortDataSources.Invoke);
            miUploadDataSource1 = AddMenuItem(206, miUploadDataSource_Click);
            miNewDataSource1 = AddMenuItem(137, Designer.cmdAddData.Invoke);
            miNewCalculatedColumn1 = AddMenuItem(55, miNewCalculatedColumn_Click);
            miNewParameter1 = AddMenuItem(56, miNewParameter_Click);
            miNewTotal1 = AddMenuItem(65, miNewTotal_Click);
            miRename = AddMenuItem(miRename_Click);
            //miRename.ShortcutKeys = Keys.F2;
            miEdit = AddMenuItem(68, miEdit_Click);
            miCopyDataSource = AddMenuItem(6, miCopyDataSource_Click);
            miDelete = AddMenuItem(51, miDelete_Click);
            miDeleteAlias = AddMenuItem(miDeleteAlias_Click);
            miView = AddMenuItem(54, miView_Click);
            miViewJson = AddMenuItem(54, miViewJson_Click);
            miSortDataFields = AddMenuItem(miSortDataFields_Click);
            mnuContext.Opening += mnuContext_Opening;

            tree.AllowDrop = true;
            tree.SelectionChanged += tree_SelectionChanged;
            tree.RightMouseButtonClicked += tree_RightMouseButtonClicked;
            tree.BeforeLabelEdit += tree_BeforeLabelEdit;
            tree.AfterLabelEdit += tree_AfterLabelEdit;
            tree.KeyDown += tree_KeyDown;
            tree.DoubleClick += miEdit_Click;
            tree.ItemDrag += tree_ItemDrag;
            tree.DragOver += tree_DragOver;
            tree.DragDrop += tree_DragDrop;
            tree.DragLeave += tree_DragLeave;

            dragIndicator = new Panel();
            dragIndicator.Visible = false;

            splitter = new Splitter();
            splitter.Dock = DockStyle.Bottom;
            splitter.Visible = false;

            lblDescription = new DescriptionControl();
            lblDescription.Dock = DockStyle.Bottom;
            lblDescription.Height = 70;
            lblDescription.Visible = false;

            Controls.AddRange(new Control[] { dragIndicator, splitter, lblDescription });
            Controls.SetChildIndex(dragIndicator, 0);

            expandedNodes = new List<string>();
            Localize();
            UpdateDpiDependencies();
        }

        /// <summary>
        /// Describes an item dragged from the "Data Dictionary" window.
        /// </summary>
        public class DraggedItem
        {
            /// <summary>
            /// The dragged object.
            /// </summary>
            public Object obj;

            /// <summary>
            /// The text of dragged object.
            /// </summary>
            public string text;

            internal DraggedItem(Object obj, string text)
            {
                this.obj = obj;
                this.text = text;
            }
        }

        /// <summary>
        /// Collection of dragged items.
        /// </summary>
        public class DraggedItemCollection : List<DraggedItem>
        {
            internal DraggedItemCollection() : base() { }
        }

        internal static class DragUtils
        {
            public static DraggedItemCollection GetAll(DragEventArgs e)
            {
                // holding dragged objects data in DragEventArgs does not work in Mono. Use simpler way
                //DraggedItemCollection items = (DraggedItemCollection)e.Data.GetData(typeof(DraggedItemCollection));
                DraggedItemCollection items = DictionaryWindow.draggedItems;

                if (items == null || items.Count == 0)
                    return null;

                return items;
            }

            public static DraggedItem GetOne(DragEventArgs e)
            {
                DraggedItemCollection items = DictionaryWindow.draggedItems;

                if (items == null || items.Count == 0)
                    return null;

                return items[items.Count - 1];
            }
        }
    }
}