using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Markup;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Tango.Editors;
using Tango.BL.Entities;
using Tango.MachineStudio.Technician.TechItems;
using Tango.Core;
using static Tango.MachineStudio.Technician.TechItems.ProcessParametersItem;
using Tango.SharedUI.Editors;

namespace Tango.MachineStudio.Technician.Editors
{
    [ContentProperty("InnerContent")]
    public partial class ProcessParametersElementEditor : ElementEditor
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="ProcessParametersElementEditor"/> class.
        /// </summary>
        public ProcessParametersElementEditor()
            : base()
        {
            InitializeComponent();
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ProcessParametersElementEditor"/> class.
        /// </summary>
        /// <param name="frameworkElement">The framework element.</param>
        public ProcessParametersElementEditor(ProcessParametersItem processParametersItem)
            : this()
        {
            ProcessParametersItem = processParametersItem;
            DataContext = ProcessParametersItem;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ProcessParametersElementEditor"/> class.
        /// </summary>
        /// <param name="frameworkElement">The framework element.</param>
        /// <param name="bounds">The bounds.</param>
        public ProcessParametersElementEditor(ProcessParametersItem processParametersItem, Rect bounds)
            : this(processParametersItem)
        {
            Left = bounds.Left;
            Top = bounds.Top;
            Width = bounds.Width;
            Height = bounds.Height;
        }

        private ProcessParametersItem _processParametersItem;

        public ProcessParametersItem ProcessParametersItem
        {
            get { return _processParametersItem; }
            set { _processParametersItem = value; RaisePropertyChanged(nameof(ProcessParametersItem)); }
        }


        /// <summary>
        /// Clones this instance.
        /// </summary>
        /// <returns></returns>
        public override IElementEditor Clone()
        {
            try
            {
                var clonedItem = ProcessParametersItem.Clone() as ProcessParametersItem;
                ProcessParametersElementEditor cloned = new ProcessParametersElementEditor(clonedItem);
                cloned.Top = Top;
                cloned.Left = Left;
                cloned.Width = Width;
                cloned.Height = Height;
                cloned.Angle = Angle;
                return cloned;
            }
            catch (Exception ex)
            {
                throw new InvalidOperationException("Could not clone this editor. You may have to create a custom editor and implement a custom Clone method.", ex);
            }
        }

        /// <summary>
        /// Gets the hosted element.
        /// </summary>
        [ParameterIgnore]
        public override Object HostedElement
        {
            get { return ProcessParametersItem; }
        }

        private void OnProcessParametersDropped(object sender, DragAndDrop.DropEventArgs e)
        {
            ParameterItem draggedItem = e.Draggable.DataContext as ParameterItem;
            ParameterItem droppedItem = e.Droppable.DataContext as ParameterItem;

            if (draggedItem != null && droppedItem != null && draggedItem.ParameterizedObject == droppedItem.ParameterizedObject)
            {
                var parameters = draggedItem.ParameterizedObject.Parameters;

                var draggedSettingItem = ProcessParametersItem.ParametersIndices.FirstOrDefault(x => x.Name == draggedItem.Name);
                var droppedSettingItem = ProcessParametersItem.ParametersIndices.FirstOrDefault(x => x.Name == droppedItem.Name);

                if (draggedSettingItem != null && droppedSettingItem != null)
                {
                    if (draggedSettingItem.Index > droppedSettingItem.Index)
                    {
                        draggedSettingItem.Index = droppedSettingItem.Index - 1;
                    }
                    else
                    {
                        draggedSettingItem.Index = droppedSettingItem.Index + 1;
                    }

                    int index = 1;

                    foreach (var settingItem in ProcessParametersItem.ParametersIndices.OrderBy(x => x.Index))
                    {
                        settingItem.Index = index++;
                    }
                }
            }

            var editor = e.Draggable.FindAncestor<ParameterizedEditor>();

            if (editor != null)
            {
                editor.ParameterizedObject = null;
                editor.ParameterizedObject = draggedItem.ParameterizedObject;
            }
        }

        private void ParameterizedEditor_GeneratingItems(object sender, SharedUI.Editors.ParameterizedEditor.GeneratingItemsEventArgs e)
        {
            List<ParameterItem> items = e.Result.ToList();

            if (ProcessParametersItem.ParametersIndices.Count > 0)
            {
                items.Clear();

                foreach (var item in ProcessParametersItem.ParametersIndices.OrderBy(x => x.Index))
                {
                    var p = e.Source.SingleOrDefault(x => x.Name == item.Name);

                    if (p != null)
                    {
                        items.Add(p);
                    }
                }
            }
            else
            {
                ProcessParametersTable p = new ProcessParametersTable();
                var pp = p.CreateParametersCollection(Core.ParameterItemMode.Binding);

                foreach (var item in pp)
                {
                    ProcessParametersItem.ParametersIndices.Add(new ParameterIndex()
                    {
                        Index = pp.IndexOf(item),
                        Name = item.Name
                    });
                }
            }

            e.Result = items;
        }
    }
}