using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Reflection;
using System.Resources;
using System.Windows.Forms;
using DevComponents.Charts.Design.Properties;
using DevComponents.DotNetBar.Charts;

namespace DevComponents.Charts.Design
{
    public class BaseCollectionEditor : CollectionEditor
    {
        #region Static variables

        static Size _lastSize = Size.Empty;
        static Point _lastLoc = Point.Empty;

        #endregion

        #region Private variables
        
        private ListBox _ListBox;
        private object _ChartItem;
        private object _LastChartItem;
        private PropertyGrid _PropertyGrid;

        private Button _AddButton;
        private Button _RemButton;
        private Button _CopyButton;
        private ToolTip _ToolTip;

        private List<object> _RemovedItems;

        private bool _EditCancelled;
        private bool _ComponentChanged;

        #endregion

        private ChartControlDesigner _ControlDesigner;
 
        public BaseCollectionEditor(Type type)
            : base(type)
        {
        }

        #region Protected properties

        protected Button AddButton
        {
            get { return (_AddButton); }
        }

        protected object ChartItem
        {
            get { return (_ChartItem); }
            set { _ChartItem = value; }
        }

        protected bool ComponentChanged
        {
            get { return (_ComponentChanged); }
        }

        protected bool EditCancelled
        {
            get { return (_EditCancelled); }
        }

        protected ListBox ListBox
        {
            get { return (_ListBox); }
        }

        #endregion

        #region Private properties

        #region RemovedItems

        private List<object> RemovedItems
        {
            get
            {
                if (_RemovedItems == null)
                    _RemovedItems = new List<object>();

                return (_RemovedItems);
            }
        }

        #endregion

        #endregion

        #region CreateCollectionForm

        protected override CollectionForm CreateCollectionForm()
        {
            _EditCancelled = false;

            CollectionForm collectionForm = base.CreateCollectionForm();

            _ChartItem = null;

            if (collectionForm.Controls[0] is TableLayoutPanel)
            {
                TableLayoutPanel tlpf = collectionForm.Controls["overArchingTableLayoutPanel"] as TableLayoutPanel;

                if (tlpf != null)
                {
                    TableLayoutPanel tlp2 = tlpf.Controls["addRemoveTableLayoutPanel"] as TableLayoutPanel;

                    if (tlp2 != null)
                    {
                        _RemButton = tlp2.Controls["removeButton"] as Button;

                        if (_RemButton != null)
                            _RemButton.Click += CollectionEditor_RemoveClick;

                        _AddButton = tlp2.Controls["addButton"] as Button;

                        if (_AddButton != null)
                        {
                            _AddButton.Click += CollectionEditor_AddClick;

                            AddCopyButton(collectionForm);
                        }
                    }

                    _ListBox = tlpf.Controls["listbox"] as ListBox;

                    if (_ListBox != null)
                        _ListBox.SelectedIndexChanged += ListBox_SelectedIndexChanged;

                    _PropertyGrid = tlpf.Controls["propertyBrowser"] as PropertyGrid;

                    if (_PropertyGrid != null)
                        _PropertyGrid.HelpVisible = true;
                }
            }

            collectionForm.Load += CollectionFormLoad;
            collectionForm.Resize += CollectionFormResize;
            collectionForm.LocationChanged += CollectionFormLocationChanged;

            return (collectionForm);
        }

        #region CollectionFormLoad

        void CollectionFormLoad(object sender, EventArgs e)
        {
            CollectionForm form = sender as CollectionForm;

            if (form != null)
            {
                if (_lastSize != Size.Empty)
                    form.Size = _lastSize;

                if (_lastLoc != Point.Empty)
                    form.Location = _lastLoc;
            }
        }

        #endregion

        #region CollectionFormResize

        void CollectionFormResize(object sender, EventArgs e)
        {
            CollectionForm form = sender as CollectionForm;

            if (form != null && form.Visible == true)
                _lastSize = form.Size;
        }

        #endregion

        #region CollectionFormLocationChanged

        void CollectionFormLocationChanged(object sender, EventArgs e)
        {
            CollectionForm form = sender as CollectionForm;

            if (form != null && form.Visible == true)
                _lastLoc = form.Location;
        }

        #endregion

        #endregion

        #region AddCopyButton

        private void AddCopyButton(CollectionForm collectionForm)
        {
            _CopyButton = new Button();

            _CopyButton.Size = new Size(24, 24);
            _CopyButton.Enabled = false;
            _CopyButton.Click += CopyButton_Click;

            ResourceManager rm = Resources.ResourceManager;
            _CopyButton.Image = (Image)rm.GetObject("Copy");

            collectionForm.Controls.Add(_CopyButton);

            _CopyButton.Location = new Point(204, 85);
            _CopyButton.BringToFront();

            _ToolTip = new ToolTip();
            _ToolTip.SetToolTip(_CopyButton, "Clone the selected item");
        }

        #endregion

        #region CopyButton_Click

        protected virtual void CopyButton_Click(object sender, EventArgs e)
        {
        }

        #endregion

        #region ListBox_SelectedIndexChanged

        void ListBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (_ListBox.SelectedItem != null)
            {
                PropertyInfo p = _ListBox.SelectedItem.GetType().GetProperty("Value");

                _LastChartItem = _ChartItem;
                _ChartItem = p.GetValue(_ListBox.SelectedItem, null);

                _CopyButton.Enabled = true;
            }
            else
            {
                _CopyButton.Enabled = false;
            }
        }

        #endregion

        #region CollectionEditor_AddClick

        protected virtual void CollectionEditor_AddClick(object sender, EventArgs e)
        {
        }

        #endregion

        #region CollectionEditor_RemoveClick

        protected virtual void CollectionEditor_RemoveClick(object sender, EventArgs e)
        {
            if (_LastChartItem != null)
            {
                RemovedItems.Add(_LastChartItem);

                if (_LastChartItem is ChartVisualElement)
                    ((ChartVisualElement)_LastChartItem).Visible = false;

                else if (_LastChartItem is SeriesPoint)
                    ((SeriesPoint)_LastChartItem).Visible = false;

                _LastChartItem = null;
            }
            else if (_ChartItem != null)
            {
                RemovedItems.Add(_ChartItem);

                if (_ChartItem is ChartVisualElement)
                    ((ChartVisualElement)_ChartItem).Visible = false;

                else if (_LastChartItem is SeriesPoint)
                    ((SeriesPoint)_LastChartItem).Visible = false;

                _ChartItem = null;
            }
        }

        #endregion

        #region CancelChanges

        protected override void CancelChanges()
        {
            _EditCancelled = true;

            if (_RemovedItems != null)
            {
                foreach (object item in _RemovedItems)
                {
                    if (item is ChartVisualElement)
                        ((ChartVisualElement)item).Visible = true;

                    else if (item is SeriesPoint)
                        ((SeriesPoint)item).Visible = true;
                }
            }

            ChartVisualElement cve = _ChartItem as ChartVisualElement;

            if (cve != null)
                cve.InvalidateLayout();

            base.CancelChanges();
        }

        #endregion

        #region BeforeEditValue

        protected IComponentChangeService BeforeEditValue(ITypeDescriptorContext context)
        {
            ChartVisualElement cve = context.Instance as ChartVisualElement;

            if (cve != null)
            {
                ISite site = cve.ChartControl.Site;
                IComponentChangeService cs = (IComponentChangeService)site.GetService(typeof(IComponentChangeService));

                if (cs != null)
                    cs.ComponentChanged += cs_ComponentChanged;

                return (cs);
            }

            return (null);
        }

        void cs_ComponentChanged(object sender, ComponentChangedEventArgs e)
        {
            _ComponentChanged = true;
        }

        #endregion

        #region AfterEditValue

        protected void AfterEditValue(ITypeDescriptorContext context, IComponentChangeService cs)
        {
            if (cs != null)
                cs.ComponentChanged -= cs_ComponentChanged;

            if (_ComponentChanged == true)
            {
                ChartContainer chCont = ((ChartVisualElement)context.Instance).ParentChartContainer;

                if (chCont != null)
                {
                    PropertyDescriptorCollection pdc = TypeDescriptor.GetProperties(chCont);
                    PropertyDescriptor pd = pdc["Name"];

                    cs.OnComponentChanged(chCont, pd, null, null);
                }
            }
        }

        #endregion

        #region GetDesigner

        internal ChartControlDesigner GetDesigner(IComponent component)
        {
            if (_ControlDesigner == null)
            {
                IDesignerHost dh = (IDesignerHost)GetService(typeof(IDesignerHost));

                _ControlDesigner = dh.GetDesigner(component) as ChartControlDesigner;
            }

            return (_ControlDesigner);
        }

        #endregion
    }
}