using System;
using System.ComponentModel;
using System.Globalization;
using System.Reflection;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Markup;

namespace WPFluent.Layout;

[ContentProperty(nameof(Children))]
public class Grid : System.Windows.Controls.Grid
{
    public static readonly DependencyProperty ColumnDefinitionsProperty =
          DependencyProperty.Register(nameof(ColumnDefinitions), typeof(ColumnDefinitionCollection), typeof(Grid), new PropertyMetadata(null, OnColumnDefinitionsChanged));

    [TypeConverter(typeof(ColumnDefinitionsConverter))]
    public new ColumnDefinitionCollection ColumnDefinitions
    {
        get => base.ColumnDefinitions;
        set => SetValue(ColumnDefinitionsProperty, value);
    }

    private static void OnColumnDefinitionsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        if (d is Grid grid && e.NewValue is ColumnDefinitionCollection columnDefinitions)
        {
            grid.UpdateColumnDefinitions(columnDefinitions);
        }
    }

    private void UpdateColumnDefinitions(ColumnDefinitionCollection columnDefinitions)
    {
        base.ColumnDefinitions.Clear();
        foreach (ColumnDefinition columnDefinition in columnDefinitions)
        {
            base.ColumnDefinitions.Add(new ColumnDefinition { Width = columnDefinition.Width });
        }
    }

    public static readonly DependencyProperty RowDefinitionsProperty =
          DependencyProperty.Register(nameof(RowDefinitions), typeof(RowDefinitionCollection), typeof(Grid), new PropertyMetadata(null, OnRowDefinitionsChanged));

    [TypeConverter(typeof(RowDefinitionsConverter))]
    public new RowDefinitionCollection RowDefinitions
    {
        get => base.RowDefinitions;
        set => SetValue(RowDefinitionsProperty, value);
    }

    private static void OnRowDefinitionsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        if (d is Grid grid && e.NewValue is RowDefinitionCollection rowDefinitions)
        {
            grid.UpdateRowDefinitions(rowDefinitions);
        }
    }

    private void UpdateRowDefinitions(RowDefinitionCollection rowDefinitions)
    {
        base.RowDefinitions.Clear();
        foreach (RowDefinition rowDefinition in rowDefinitions)
        {
            base.RowDefinitions.Add(new RowDefinition { Height = rowDefinition.Height });
        }
    }
}

internal sealed class ColumnDefinitionsConverter : TypeConverter
{
    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
    {
        return sourceType == typeof(ColumnDefinitionCollection) || base.CanConvertFrom(context, sourceType);
    }

    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object value)
    {
        bool hotReload = false;

        try
        {
            if (value is string strValue)
            {
                System.Windows.Controls.Grid _grid = null!;

                if (context is IProvideValueTarget target)
                {
                    _grid = (System.Windows.Controls.Grid)target.TargetObject;
                }
                else
                {
                    // Support for Hot Reload (WpfVisualTreeService.LiveMarkup.TapTypeDescriptorContext).
                    _grid = new System.Windows.Controls.Grid();
                    hotReload = true;
                }

                ColumnDefinitionCollection columnDefinitions = (ColumnDefinitionCollection)Activator.CreateInstance(
                    typeof(ColumnDefinitionCollection),
                    BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.OptionalParamBinding,
                    null!,
                    [_grid],
                    null!)!;
                GridLengthConverter converter = new();
                string[] definitions = strValue.Split(',');

                foreach (string definition in definitions)
                {
                    GridLength gridLength = (GridLength)converter.ConvertFromString(definition.Trim())!;
                    columnDefinitions.Add(new ColumnDefinition { Width = gridLength });
                }

                return columnDefinitions;
            }
            else if (value is ColumnDefinitionCollection columnDefinitions)
            {
                return columnDefinitions;
            }
        }
        catch (Exception e)
        {
            if (!hotReload)
            {
                throw new InvalidOperationException($"Invalid ColumnDefinitions value \"{value}\".{Environment.NewLine}" + e);
            }
            return DependencyProperty.UnsetValue;
        }

        return base.ConvertFrom(context, culture, value);
    }
}

internal sealed class RowDefinitionsConverter : TypeConverter
{
    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
    {
        return sourceType == typeof(RowDefinitionCollection) || base.CanConvertFrom(context, sourceType);
    }

    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object value)
    {
        bool hotReload = false;

        try
        {
            if (value is string strValue)
            {
                System.Windows.Controls.Grid _grid = null!;

                if (context is IProvideValueTarget target)
                {
                    _grid = (System.Windows.Controls.Grid)target.TargetObject;
                }
                else
                {
                    // Support for Hot Reload (WpfVisualTreeService.LiveMarkup.TapTypeDescriptorContext).
                    _grid = new System.Windows.Controls.Grid();
                    hotReload = true;
                }

                RowDefinitionCollection rowDefinitions = (RowDefinitionCollection)Activator.CreateInstance(
                    typeof(RowDefinitionCollection),
                    BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.OptionalParamBinding,
                    null!,
                    [_grid],
                    null!)!;
                GridLengthConverter converter = new();
                string[] definitions = strValue.Split(',');

                foreach (string definition in definitions)
                {
                    GridLength gridLength = (GridLength)converter.ConvertFromString(definition.Trim())!;
                    rowDefinitions.Add(new RowDefinition { Height = gridLength });
                }

                return rowDefinitions;
            }
            else if (value is RowDefinitionCollection rowDefinitions)
            {
                return rowDefinitions;
            }
        }
        catch (Exception e)
        {
            if (!hotReload)
            {
                throw new InvalidOperationException($"Invalid RowDefinitions value \"{value}\".{Environment.NewLine}" + e);
            }
            return DependencyProperty.UnsetValue;
        }

        return base.ConvertFrom(context, culture, value);
    }
}