using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using InABox.Clients;
using InABox.Core;

namespace InABox.DynamicGrid
{
    internal class PopupEditorControl : DynamicEditorControl<Guid>
    {
        private string _description = "";

        private Type _type;
        private Guid _value = Guid.Empty;

        private TextBox Editor;
        //public event DefineFilter OnDefineFilter;

        public PopupEditorControl()
        {
            OtherColumns = new Dictionary<string, string>();
        }

        public Dictionary<string, string> OtherColumns { get; }

        public event OnUpdateOtherEditorHandler OnUpdateOtherEditor;

        protected override FrameworkElement CreateEditor()
        {
            var Grid = new Grid
            {
                VerticalAlignment = VerticalAlignment.Stretch,
                HorizontalAlignment = HorizontalAlignment.Stretch
            };
            Grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
            Grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(30, GridUnitType.Pixel) });
            Grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(50, GridUnitType.Pixel) });

            Editor = new TextBox
            {
                VerticalAlignment = VerticalAlignment.Stretch,
                VerticalContentAlignment = VerticalAlignment.Center,
                HorizontalAlignment = HorizontalAlignment.Stretch,
                IsReadOnly = true
            };
            Editor.SetValue(Grid.ColumnProperty, 0);
            Editor.SetValue(Grid.RowProperty, 0);
            Grid.Children.Add(Editor);

            var Select = new Button
            {
                VerticalAlignment = VerticalAlignment.Stretch,
                VerticalContentAlignment = VerticalAlignment.Center,
                HorizontalAlignment = HorizontalAlignment.Stretch,
                Content = "..",
                Margin = new Thickness(5, 0, 0, 0),
                Focusable = false
            };
            Select.SetValue(Grid.ColumnProperty, 1);
            Select.SetValue(Grid.RowProperty, 0);
            Select.Click += Select_Click;
            Grid.Children.Add(Select);

            var Clear = new Button
            {
                VerticalAlignment = VerticalAlignment.Stretch,
                VerticalContentAlignment = VerticalAlignment.Center,
                HorizontalAlignment = HorizontalAlignment.Stretch,
                Content = "Clear",
                Margin = new Thickness(5, 0, 0, 0),
                Focusable = false
            };
            Clear.SetValue(Grid.ColumnProperty, 2);
            Clear.SetValue(Grid.RowProperty, 0);
            Clear.Click += Clear_Click;
            Grid.Children.Add(Clear);

            return Grid;
        }

        private void Select_Click(object sender, RoutedEventArgs e)
        {
            if (_type != null)
            {
                var list = new PopupList(_type, _value, OtherColumns.Keys.ToArray());

                //list.OnDefineFilter += (o, t) => { return OnDefineFilter?.Invoke(o, t); };

                if (list.ShowDialog() == true)
                {
                    _value = list.ID;

                    //Dictionary<String, String> fieldmap = new Dictionary<String, String>();
                    foreach (var key in OtherColumns.Keys)
                        //String[] comps = othercolumn.Split(new String[] { "->" }, StringSplitOptions.None);
                        //String field = comps.Last();
                        //fieldmap[comps.First()] = field;
                        OtherValues[OtherColumns[key]] = list.OtherValues[key];
                    //fieldmap[OtherColumns[key]] = list.OtherValues[othercolumn]
                    CheckChanged();

                    var display = new List<string>();
                    //var columns = Entity.DefaultLookupColumns(_type) as IColumns;
                    var columns = LookupFactory.DefineColumns(_type);
                    foreach (var column in columns.ColumnNames())
                        if (list.OtherValues.ContainsKey(column))
                            display.Add(list.OtherValues[column].ToString());
                    Editor.Text = string.Join(" / ", display.Where(x => x != null && !string.IsNullOrWhiteSpace(x.ToString())));
                }
            }
        }

        private void Clear_Click(object sender, RoutedEventArgs e)
        {
            if (_type != null)
            {
                _value = Guid.Empty;
                foreach (var otherfield in OtherColumns.Keys)
                    OtherValues[OtherColumns[otherfield]] = null;
                CheckChanged();
                Editor.Text = "";
            }
        }

        public override int DesiredHeight()
        {
            return 25;
        }

        public override int DesiredWidth()
        {
            return int.MaxValue;
        }

        protected override Guid RetrieveValue()
        {
            return _value;
        }

        protected override void UpdateValue(Guid value)
        {
            _value = value;

            var client = ClientFactory.CreateClient(_type);
            var columns = LookupFactory.DefineColumns(_type);
            var sort = LookupFactory.DefineSort(_type);
            var filter = Activator.CreateInstance(typeof(Filter<>).MakeGenericType(_type));
            CoreUtils.SetPropertyValue(filter, "Expression", CoreUtils.GetMemberExpression(_type, "ID"));
            CoreUtils.SetPropertyValue(filter, "Operator", Operator.IsEqualTo);
            CoreUtils.SetPropertyValue(filter, "Value", value);

            var lookup = client.Query(filter, columns, sort);
            var display = new List<object>();
            if (lookup.Rows.Any())
                foreach (var col in lookup.Columns.Where(x => !x.ColumnName.Equals("ID")))
                    display.Add(lookup.Rows.First()[col.ColumnName]);

            Editor.Text = string.Join(" / ", display.Where(x => x != null && !string.IsNullOrWhiteSpace(x.ToString())));
        }


        public override void Configure()
        {
            base.Configure();
            _type = (EditorDefinition as PopupEditor)?.Type;
        }

        public override void SetFocus()
        {
            Editor.Focus();
        }

        public override void SetColor(Color color)
        {
            Editor.Background = new SolidColorBrush(color);
        }
    }
}