using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Drawing;
using FastReport.Utils;
using FastReport.Forms;
using FastReport.DevComponents.DotNetBar;

namespace FastReport.Design
{
    internal class ObjectsToolbar : Bar, IDesignerPlugin
    {
        #region Fields
        private Designer designer;
        private Report currentReport;
        private PageBase currentPage;
        private ObjectInfo nowInserting;
        public ButtonItem btnSelect;
        #endregion

        #region Properties
        internal Designer Designer
        {
            get { return designer; }
        }

        /// <inheritdoc/>
        public string PluginName
        {
            get { return Name; }
        }
        #endregion

        #region Private Methods
        private void DoCreateButtons(ObjectInfo rootItem, SubItemsCollection items)
        {
            foreach (ObjectInfo item in rootItem.Items)
            {
                if (!item.Enabled)
                    continue;

                ButtonItem button = new ButtonItem();
                button.Image = Designer.GetImage(item.ImageIndex);
                int buttonSize = Designer.LogicalToDevice(25);

                string text = Res.TryGet(item.Text);
                if (items == Items)
                {
                    button.Tooltip = text;
                    button.FixedSize = new Size(buttonSize, buttonSize);
                }
                else
                {
                    button.Text = text;
                    button.ButtonStyle = eButtonStyle.ImageAndText;
                }

                if (item.Items.Count > 0)
                {
                    // it's a category
                    DoCreateButtons(item, button.SubItems);
                    button.PopupSide = ePopupSide.Right;
                    if (items == Items)
                    {
                        button.AutoExpandOnClick = true;
                        button.FixedSize = new Size(buttonSize, Designer.LogicalToDevice(32));
                    }
                    button.Tag = item;
                }
                else
                {
                    button.Tag = item;
                    button.Click += button_Click;
                }

                items.Add(button);
            }
            SortButtons(items);
        }

        private void CreateSelectBtn()
        {
            btnSelect = new ButtonItem();
            btnSelect.Image = Designer.GetImage(100);
            btnSelect.Click += btnSelect_Click;
            btnSelect.FixedSize = Designer.LogicalToDevice(new Size(25, 25));
            btnSelect.Tooltip = Res.Get("Designer,Toolbar,Objects,Select");
            Items.Add(btnSelect);
        }

        private void SortButtons(SubItemsCollection root)
        {
            List<BaseItem> tempItems = new List<BaseItem>();
            List<BaseItem> lastItems = new List<BaseItem>();
            tempItems.Add(root[0]);
            for (int i = 1; i < root.Count; i++)
            {
                for (int j = 1; j < root.Count; j++)
                {
                    ObjectInfo objInfo = (root[j] as ButtonItem).Tag as ObjectInfo;
                    if (objInfo != null)
                    {
                        if (objInfo.ButtonIndex == i)
                        {
                            tempItems.Add(root[j]);
                        }
                        if (objInfo.ButtonIndex < 0 || objInfo.ButtonIndex >= root.Count)
                        {
                            lastItems.Add(root[j]);
                        }
                    }
                }
            }
            root.Clear();
            root.AddRange(tempItems.ToArray());
            root.AddRange(lastItems.ToArray());
        }

        private void CreateButtons(bool forceCreate = false)
        {
            if (!forceCreate &&
                Designer.ActiveReport != null && Designer.ActiveReport == currentReport &&
                Designer.ActiveReportTab.ActivePage == currentPage)
                return;
            currentReport = Designer.ActiveReport;
            if (Designer.ActiveReportTab != null)
                currentPage = Designer.ActiveReportTab.ActivePage;
            else
                currentPage = null;

            // delete all buttons except btnSelect
            int i = 0;
            while (i < Items.Count)
            {
                if (!forceCreate && Items[i] == btnSelect)
                    i++;
                else
                {
                    Items[i].Dispose();
                    Items.RemoveAt(i);
                }
            }

            if (forceCreate)
                CreateSelectBtn();
            if (currentPage == null)
            {
                RecalcLayout();
                return;
            }

            // create object buttons
            ObjectInfo pageItem = RegisteredObjects.FindObject(currentPage);
            if (pageItem != null)
            {
                DoCreateButtons(pageItem, Items);
            }

            RecalcLayout();
        }

        private void button_Click(object sender, EventArgs e)
        {
            Designer.FormatPainter = false;
            if (!Designer.cmdInsert.Enabled)
                return;

            ResetButtons();
            if (sender is ButtonItem && (sender as ButtonItem).IsOnBar)
                (sender as ButtonItem).Checked = true;
            nowInserting = (sender as ButtonItem).Tag as ObjectInfo;
            Designer.InsertObject(nowInserting, InsertFrom.NewObject);
        }

        private void btnSelect_Click(object sender, EventArgs e)
        {
            Designer.FormatPainter = false;
            if (Designer.ActiveReportTab == null)
                return;
            DoClickSelectButton(true);
        }

        private void DoClickSelectButton(bool ignoreMultiInsert)
        {
            if (!btnSelect.Checked)
            {
                if (nowInserting != null && nowInserting.MultiInsert && !ignoreMultiInsert)
                {
                    Designer.InsertObject(nowInserting, InsertFrom.NewObject);
                }
                else
                {
                    ResetButtons();
                    btnSelect.Checked = true;
                    Designer.CancelPaste();
                }
            }
        }

        private void ResetButtons()
        {
            foreach (BaseItem item in Items)
            {
                if (item is ButtonItem)
                    (item as ButtonItem).Checked = false;
            }
        }
        #endregion

        #region Public Methods
        public void ClickSelectButton(bool ignoreMultiInsert)
        {
            DoClickSelectButton(ignoreMultiInsert);
        }
        #endregion

        #region IDesignerPlugin
        /// <inheritdoc/>
        public void SaveState()
        {
        }

        /// <inheritdoc/>
        public void RestoreState()
        {
        }

        /// <inheritdoc/>
        public void SelectionChanged()
        {
            CreateButtons();
        }

        /// <inheritdoc/>
        public void UpdateContent()
        {
            CreateButtons();
        }

        /// <inheritdoc/>
        public void Lock()
        {
        }

        /// <inheritdoc/>
        public void Unlock()
        {
            UpdateContent();
        }

        /// <inheritdoc/>
        public void Localize()
        {
            MyRes res = new MyRes("Designer,Toolbar,Objects");
            Text = res.Get("");
            btnSelect.Tooltip = res.Get("Select");
        }

        /// <inheritdoc/>
        public DesignerOptionsPage GetOptionsPage()
        {
            return null;
        }

        /// <inheritdoc/>
        public void UpdateUIStyle()
        {
        }

        /// <inheritdoc/>
        public new void UpdateDpiDependencies()
        {
            SuspendLayout();
            Font = this.LogicalToDevice(DrawUtils.DefaultFont);
            base.UpdateDpiDependencies();
            Width = Designer.LogicalToDevice(29);
            CreateButtons(true);
            ResumeLayout();
        }
        #endregion

        public ObjectsToolbar(Designer designer)
            : base()
        {
            this.designer = designer;
            Name = "ObjectsToolbar";
            Dock = DockStyle.Left;
            DockOrientation = eOrientation.Vertical;
            RoundCorners = false;

            Parent = Designer.DotNetBarManager.ToolbarLeftDockSite;
            UpdateDpiDependencies();
            Localize();
        }
    }
}