using OpenTap.Addin;
using OpenTapEditor.Util;
using SeqEditor.SubWin;
using SeqEditor.Util;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using UILib;

namespace OpenTapEditor
{
    public class MultiTestVariableConverter : IMultiValueConverter
    {
        public static MultiTestVariableConverter Instance = new MultiTestVariableConverter();
        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            if (values[0] is TestVariable tv && values[1] is TreeListViewItem item)
            {
                if (parameter?.ToString() == "NameCanEdit")
                {
                    var parent = item?.parent?.DataContext as TestVariable;
                    return tv.NameCanEdit ? (parent != null && !parent.IsArray) : false;
                }

                if (parameter?.ToString() == "ChangeButton")
                {
                    var parent = item?.parent?.DataContext as TestVariable;
                    if (!tv.NameCanEdit)
                    {
                        return Visibility.Collapsed;
                    }

                    if (parent?.IsArray == true && parent.Type != TestVariableType.Container)
                    {
                        return Visibility.Collapsed;
                    }

                    return Visibility.Visible;
                }
            }
            return null;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        {
            return null;
        }
    }

    public class TestVariableConverter : IValueConverter
    {
        public static TestVariableConverter Instance = new TestVariableConverter();

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is TestVariable tv)
            {
                if (parameter?.ToString() == "TypeName")
                {
                    return tv.IsArray ? $"{tv.Type}[]" : tv.Type.ToString();
                }
                if (parameter?.ToString() == "StringFormat")
                {
                    return tv.IsArray || tv.Type != TestVariableType.String ? false : true;
                }
                if (parameter?.ToString() == "CanEdit")
                {
                    return !tv.IsArray && tv.Type != TestVariableType.Container && tv.Type != TestVariableType.Refrence;
                }
                if (parameter?.ToString() == "EditType")
                {
                    return tv.Type == TestVariableType.Bool ? EditBoxType.Bool : EditBoxType.String;
                }
            }
            else if (value is RunningVar rv)
            {
                if (parameter?.ToString() == "TypeName")
                {
                    return rv.IsArray ? $"{rv.Type}[]" : rv.Type.ToString();
                }
                if (parameter?.ToString() == "StringFormat")
                {
                    return rv.IsArray || rv.Type != TestVariableType.String ? false : true;
                }
                if (parameter?.ToString() == "CanEdit")
                {
                    return !rv.IsArray && rv.Type != TestVariableType.Container && rv.Type != TestVariableType.Refrence;
                }
                if (parameter?.ToString() == "EditType")
                {
                    return rv.Type == TestVariableType.Bool ? EditBoxType.Bool : EditBoxType.String;
                }
            }
            return value;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return value;
        }
    }

    public class TestVariableMenuItem : MenuItem
    {
        public IEnumerable<TestVariable> Source { get; set; }
        public TestVariable Variable { get; set; }
        public TestVariable Parent { get; set; }

        public TreeListViewItem SourceItem { get; set; }

        public bool TargetIsArray { get; set; }
        public TestVariableType TargetType { get; set; }
    }

    /// <summary>
    /// VariableTree.xaml 的交互逻辑
    /// </summary>
    public partial class VariableTree : UserControl
    {
        public VariableTree()
        {
            InitializeComponent();
            BindingOperations.SetBinding(treeView, TreeListView.ItemsSourceProperty,
            new Binding(nameof(Datasource))
            {
                Source = this,
                Mode = BindingMode.TwoWay,
            });
        }

        public static DependencyProperty DatasourceProperty = DependencyProperty.Register(
            "Datasource",
            typeof(ObservableCollection<TestVariable>),
            typeof(VariableTree),
            new PropertyMetadata(null)
        );

        public string Prefix { get; set; }

        public ObservableCollection<TestVariable> Datasource
        {
            get => (ObservableCollection<TestVariable>)GetValue(DatasourceProperty);
            set
            {
                SetValue(DatasourceProperty, value);
            }
        }

        private void OnPreviewMouseRightButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            DependencyObject source = e.OriginalSource as DependencyObject;
            while (source != null && source.GetType() != typeof(TreeListViewItem))
            {
                source = System.Windows.Media.VisualTreeHelper.GetParent(source);
            }

            if (source != null)
            {
                TreeListViewItem item = source as TreeListViewItem;
                item.Focus();
                var variable = item.DataContext;
                CreateContextMenu(item, variable);
            }
            else
            {
                CreateContextMenu(null, null);
            }
        }

        public List<object> RefreshMenuItems(TreeListViewItem parentItem, TestVariable parent, TestVariable source)
        {
            var allSteps = StepTypeLoader.Steps;
            var StepMenuItems = new List<object>(allSteps.Count);

            foreach (TestVariableType type in Enum.GetValues(typeof(TestVariableType)))
            {
                TestVariableMenuItem menuItem = new TestVariableMenuItem();
                menuItem.Header = type.ToString();
                menuItem.SourceItem = parentItem;
                menuItem.Variable = source;

                menuItem.Click += MenuItem_Click;
                menuItem.TargetIsArray = false;
                menuItem.TargetType = type;
                menuItem.Parent = parent;
                StepMenuItems.Add(menuItem);
            }

            var arrItem = new MenuItem();
            arrItem.Header = "Array Of...";
            foreach (TestVariableType type in Enum.GetValues(typeof(TestVariableType)))
            {
                TestVariableMenuItem menuItem = new TestVariableMenuItem();
                menuItem.Header = type.ToString();
                menuItem.SourceItem = parentItem;
                menuItem.Variable = source;

                menuItem.Click += ArrayMenuItem_Click;
                menuItem.TargetIsArray = true;
                menuItem.TargetType = type;
                menuItem.Parent = parent;
                arrItem.Items.Add(menuItem);
            }
            StepMenuItems.Add(arrItem);
            return StepMenuItems;
        }

        /// <summary>
        /// 显示菜单
        /// </summary>
        /// <param name="positionItem"></param>
        private void CreateContextMenu(TreeListViewItem item, object obj)
        {
            var v = obj as TestVariable;

            ContextMenu contextMenu = new ContextMenu();
            contextMenu.Closed += ContextMenu_Closed;
            var parentItem = item?.parent as TreeListViewItem;
            var parent = item?.parent?.DataContext as TestVariable;


            TestVariableMenuItem menuItem = new TestVariableMenuItem();
            if (v == null)
            {
                return;
                //menuItem.SetValue(TestVariableMenuItem.HeaderProperty, new DynamicResourceExtension("插入").ProvideValue(null));

                //foreach (var i in RefreshMenuItems(item, null))
                //{
                //    menuItem.Items.Add(i);
                //}
                //contextMenu.Items.Add(menuItem);
            }

            if (v.IsArray)
            {
                menuItem.SetValue(TestVariableMenuItem.HeaderProperty, new DynamicResourceExtension("添加元素").ProvideValue(null));
                menuItem.Parent = v;
                menuItem.Click += MenuItem_Click;
                menuItem.SourceItem = item;
                contextMenu.Items.Add(menuItem);
            }
            else if (v.Type == TestVariableType.Container)
            {
                menuItem.SetValue(TestVariableMenuItem.HeaderProperty, new DynamicResourceExtension("添加").ProvideValue(null));
                foreach (var i in RefreshMenuItems(item, v, null))
                {
                    menuItem.Items.Add(i);
                }
                contextMenu.Items.Add(menuItem);
            }

            if (parent != null)
            {
                if (parent.IsArray)
                {
                    menuItem = new TestVariableMenuItem();
                    menuItem.SetValue(TestVariableMenuItem.HeaderProperty, new DynamicResourceExtension("插入元素").ProvideValue(null));
                    menuItem.SourceItem = parentItem;
                    menuItem.Parent = parent;
                    menuItem.Variable = v;
                    menuItem.Click += MenuItem_Click;
                    contextMenu.Items.Add(menuItem);
                }
                else
                {
                    menuItem = new TestVariableMenuItem();
                    menuItem.SetValue(TestVariableMenuItem.HeaderProperty, new DynamicResourceExtension("插入").ProvideValue(null));
                    foreach (var i in RefreshMenuItems(parentItem, parent, v))
                    {
                        menuItem.Items.Add(i);
                    }
                    contextMenu.Items.Add(menuItem);
                }
            }

            if (v.NameCanEdit)
            {
                menuItem = new TestVariableMenuItem();
                menuItem.SetValue(TestVariableMenuItem.HeaderProperty, new DynamicResourceExtension("删除").ProvideValue(null));
                menuItem.Click += Delete_Click;
                menuItem.Variable = v;
                menuItem.Tag = item;
                contextMenu.Items.Add(menuItem);
            }

            menuItem = new TestVariableMenuItem();
            menuItem.SetValue(TestVariableMenuItem.HeaderProperty, new DynamicResourceExtension("复制名称").ProvideValue(null));
            menuItem.Click += CopyName_Click;
            menuItem.Tag = item;
            contextMenu.Items.Add(menuItem);

            this.treeView.ContextMenu = contextMenu;
        }

        private void ContextMenu_Closed(object sender, RoutedEventArgs e)
        {
            this.treeView.ContextMenu = null;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void MenuItem_Click(object sender, RoutedEventArgs e)
        {
            TestVariableMenuItem item = sender as TestVariableMenuItem;
            TestVariable parent = item.Parent;
            TestVariable newOne = null;
            TestVariable source = item.Variable;
            TreeListViewItem parentItem = item.SourceItem;

            if (parent == null)
            {
                return;
            }

            if (parent.IsArray)
            {
                newOne = new TestVariable
                {
                    Name = $"[{parent.Children.Count}]",
                    IsArray = false,
                    Type = parent.Type,
                    Value = TestVariable.DefaultValue(parent.Type)
                };
                if (source == null)
                {
                    parent.Children.Add(newOne);
                }
                else
                {
                    parent.Children.Insert(parent.Children.IndexOf(source) + 1, newOne);
                }

                for (int i = 0; i < parent.Children.Count; i++)
                {
                    parent.Children[i].Name = $"[{i}]";
                }
                goto End;
            }

            if (parent.Type == TestVariableType.Container)
            {
                newOne = new TestVariable
                {
                    IsArray = item.TargetIsArray,
                    Type = item.TargetType,
                    Value = item.TargetIsArray ? null : TestVariable.DefaultValue(item.TargetType)
                };
                if (source == null)
                {
                    parent.Children.Add(newOne);
                }
                else
                {
                    parent.Children.Insert(parent.Children.IndexOf(source) + 1, newOne);
                }
                goto End;
            }

        End:
            parentItem.IsExpanded = true;
            DispatcherHelper.WaitForPriority();
            var scroll = treeView.Template.FindName("scroll", treeView) as ScrollViewer;
            var tvi = parentItem.ItemContainerGenerator.ContainerFromIndex(parent.Children.IndexOf(newOne)) as TreeListViewItem;
            if (!DispatcherHelper.IsElementVisibleInScrollViewer(scroll, tvi))
            {
                Point offset = tvi.TransformToAncestor(scroll).Transform(new Point(0, 0));
                scroll.ScrollToVerticalOffset(offset.Y);
            }
            var eb = DispatcherHelper.FindVisualChild<EditBox>(tvi);
            eb?.TryEdit(null);
            tvi.IsSelected = true;
        }

        /// <summary>
        /// 添加Array
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ArrayMenuItem_Click(object sender, RoutedEventArgs e)
        {
            TestVariableMenuItem item = sender as TestVariableMenuItem;
            TestVariable parent = item.Parent;
            TestVariable newOne = null;
            TestVariable source = item.Variable;
            TreeListViewItem parentItem = item.SourceItem;

            if (parent == null)
            {
                return;
            }
            string ValidateName(string name)
            {
                var target = parent.Children?.FirstOrDefault(e => e.Name == name);
                if (target != null)
                {
                    return LangUtil.Format("参数名称重复2", name, parent.Name);
                }
                return null;
            }

            var win = new ArrayVarConfig(ValidateName)
            {
                VarType = item.TargetType,
                Owner = Window.GetWindow(this),
            };

            if (win.ShowDialog() != true)
            {
                return;
            }

            newOne = new TestVariable
            {
                Name = win.VarName,
                IsArray = item.TargetIsArray,
                Type = win.VarType,
                Value = null
            };
            for (int i = 0; i < win.Length; i++)
            {
                TestVariable child = new TestVariable
                {
                    IsArray = false,
                    Type = newOne.Type,
                    Name = $"[{i}]",
                    Value = TestVariable.DefaultValue(newOne.Type)
                };
                newOne.Children.Add(child);
            }

            if (source == null)
            {
                parent.Children.Add(newOne);
            }
            else
            {
                parent.Children.Insert(parent.Children.IndexOf(source) + 1, newOne);
            }
            goto End;

        End:
            parentItem.IsExpanded = true;
            DispatcherHelper.WaitForPriority();
            var scroll = treeView.Template.FindName("scroll", treeView) as ScrollViewer;
            var tvi = parentItem.ItemContainerGenerator.ContainerFromIndex(parent.Children.IndexOf(newOne)) as TreeListViewItem;
            if (!DispatcherHelper.IsElementVisibleInScrollViewer(scroll, tvi))
            {
                Point offset = tvi.TransformToAncestor(scroll).Transform(new Point(0, 0));
                scroll.ScrollToVerticalOffset(offset.Y);
            }
            if (string.IsNullOrEmpty(newOne.Name))
            {
                var eb = DispatcherHelper.FindVisualChild<EditBox>(tvi);
                eb?.TryEdit(null);
            }
            tvi.IsSelected = true;
        }

        private void Delete_Click(object sender, RoutedEventArgs e)
        {
            var tv = ((TestVariableMenuItem)sender).Variable;
            var item = ((TestVariableMenuItem)sender).Tag as TreeListViewItem;
            if (item.parent == null)
            {
                Datasource.Remove(tv);
            }
            else
            {
                var parentData = item.parent.DataContext as TestVariable;
                parentData.Children.Remove(tv);
                if (parentData.IsArray)
                {
                    for (int i = 0; i < parentData.Children.Count; i++)
                    {
                        parentData.Children[i].Name = $"[{i}]";
                    }
                }
            }
        }

        private void CopyName_Click(object sender, RoutedEventArgs e)
        {
            var item = ((TestVariableMenuItem)sender).Tag as TreeListViewItem;
            var tv = item?.DataContext as TestVariable;

            string name = "";
            while (tv != null)
            {
                if (tv.IsArray)
                {
                    name = tv.Name + name;
                }
                else
                {
                    name = tv.Name + (string.IsNullOrEmpty(name) ? "" : $".{name}");
                }
                item = item.parent;
                tv = item?.DataContext as TestVariable;
            }
            Clipboard.SetText(string.IsNullOrEmpty(Prefix) ? name : $"{Prefix}.{name}");
        }

        private bool VariableNamePreSubmit(object sender, object value, object source)
        {
            EditBox eb = (EditBox)sender;
            TreeListViewItem item = (TreeListViewItem)eb.Tag;
            var parentItem = item.parent;
            if (parentItem == null)
            {
                return false;
            }
            if (string.IsNullOrEmpty(value.ToString()))
            {
                MessageBox.Show(LangUtil.Get("参数名称不能为空"));
                return false;
            }

            TestVariable parent = (TestVariable)parentItem.DataContext;
            var target = parent.Children.FirstOrDefault(c => c.Name == value.ToString());
            if (target != null && target != source)
            {
                MessageBox.Show(LangUtil.Format("参数名称重复", value));
                return false;
            }
            return true;
        }

        private void ChangeButton_Click(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;
            var menu = new ContextMenu();
            btn.ContextMenu = menu;
            TestVariable source = (TestVariable)btn.DataContext;
            TreeListViewItem sourceItem = (TreeListViewItem)btn.Tag;
            TreeListViewItem parentItem = sourceItem.parent;

            void Menu_Closed(object sender, RoutedEventArgs e)
            {
                btn.ContextMenu = null;
            }

            void MenuItem_Click1(object sender, RoutedEventArgs e)
            {
                if (parentItem == null)
                {
                    return;
                }
                TestVariable parent = (TestVariable)parentItem.DataContext;
                int index = parent.Children.IndexOf(source);
                if (index < 0)
                {
                    return;
                }

                TestVariableMenuItem item = (TestVariableMenuItem)sender;

                

                if (item.TargetIsArray)
                {
                    string ValidateName(string name)
                    {
                        if (string.IsNullOrEmpty(name))
                        {
                            return LangUtil.Get("参数名称不能为空");
                        }
                        var target = parent.Children?.FirstOrDefault(e => e.Name == name);
                        if (target != null && target != source)
                        {
                            return LangUtil.Format("参数名称重复2", name, parent.Name);
                        }
                        return null;
                    }

                    var win = new ArrayVarConfig(ValidateName)
                    {
                        VarName = source.Name,
                        VarType = item.TargetType,
                        Length = source.Children.Count,
                        Owner = Window.GetWindow(this),
                    };

                    if (win.ShowDialog() != true)
                    {
                        return;
                    }

                    if (source.IsArray && source.Type == win.VarType && source.Children.Count == win.Length)
                    {
                        return;
                    }

                    ObservableCollection<TestVariable> olds = new ObservableCollection<TestVariable>();
                    if (source.IsArray && source.Type == win.VarType)
                    {
                        olds = source.Children;
                    }

                    TestVariable newOne = new TestVariable
                    {
                        IsArray = true,
                        Name = win.VarName,
                        Type = win.VarType
                    };

                    for (int i = 0; i < win.Length; i++)
                    {
                        TestVariable child = new TestVariable
                        {
                            IsArray = false,
                            Type = newOne.Type,
                            Name = $"[{i}]",
                            Value = i < olds.Count ? olds[i].Value : TestVariable.DefaultValue(newOne.Type)
                        };
                        newOne.Children.Add(child);
                    }
                    parent.Children[index] = newOne;
                }
                else
                {
                    if (!source.IsArray && source.Type == item.TargetType)
                    {
                        return;
                    }
                    TestVariable newOne = new TestVariable
                    {
                        IsArray = false,
                        Name = source.Name,
                        Type = item.TargetType,
                        Value = TestVariable.DefaultValue(item.TargetType)
                    };
                    parent.Children[index] = newOne;
                }
            }

            foreach (TestVariableType type in Enum.GetValues(typeof(TestVariableType)))
            {
                TestVariableMenuItem menuItem = new TestVariableMenuItem();
                menuItem.Header = type.ToString();
                menuItem.Variable = source;

                menuItem.Click += MenuItem_Click1; ;
                menuItem.TargetIsArray = false;
                menuItem.TargetType = type;
                menu.Items.Add(menuItem);
            }

            var arrItem = new MenuItem();
            arrItem.Header = "Array Of...";
            foreach (TestVariableType type in Enum.GetValues(typeof(TestVariableType)))
            {
                TestVariableMenuItem menuItem = new TestVariableMenuItem();
                menuItem.Header = type.ToString();
                menuItem.Variable = source;

                menuItem.Click += MenuItem_Click1;
                menuItem.TargetIsArray = true;
                menuItem.TargetType = type;
                arrItem.Items.Add(menuItem);
            }
            menu.Items.Add(arrItem);
            menu.IsOpen = true;
        }
    }
}