using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.Primitives;
using Avalonia.Data;
using Avalonia.Input;
using Avalonia.Layout;
using Avalonia.Markup.Xaml;
using Avalonia.Media;
using Avalonia.Threading;
using DispenserCommon.Atrributes;
using DispenserCommon.Utils;
using Masuit.Tools;
using ReactiveUI;
using SQLite;

namespace DispenserUI.Views.Controls;

/// <summary>
///     参数配置编辑器
/// </summary>
public partial class SettingEditor : UserControl
{
    public event EventHandler<object> OnSaveClicked;

    public static readonly StyledProperty<object> ParamProperty =
        AvaloniaProperty.Register<SettingEditor, object>(nameof(Param));

    public static readonly StyledProperty<string> TitleProperty =
        AvaloniaProperty.Register<SettingEditor, string>(nameof(Title));

    public static readonly StyledProperty<string?> PathNameProperty =
        AvaloniaProperty.Register<SettingEditor, string?>(nameof(PathName));

    public SettingEditor()
    {
        InitializeComponent();
        Layout = this.FindControl<ScrollViewer>("Layout");
        this.GetObservable(ParamProperty).Subscribe(ps =>
        {
            if (ps == null) return;
            Dispatcher.UIThread.InvokeAsync(() =>
            {
                Param = ps;
                Render();
            });
        });
    }

    public object Param
    {
        get => GetValue(ParamProperty);
        set => SetValue(ParamProperty, value);
    }

    public string Title
    {
        get => GetValue(TitleProperty);
        set => SetValue(TitleProperty, value);
    }

    public string? PathName
    {
        get => GetValue(PathNameProperty);
        set => SetValue(PathNameProperty, value);
    }

    private void InitializeComponent()
    {
        AvaloniaXamlLoader.Load(this);
    }


    /// <summary>
    ///     渲染UI控件
    /// </summary>
    private void Render()
    {
        if (Param.IsNullOrEmpty()) return;

        // 外层用一个大的 Border 来装
        var itemLayout = new Border
        {
            Padding = new Thickness(10),
            Margin = new Thickness(5),
            Background = Brush.Parse("#F6F8FA"),
            BoxShadow = BoxShadows.Parse("0 0 16 0 LightGray"),
            CornerRadius = new CornerRadius(10)
        };

        var stackPanel = new StackPanel();

        var titleBorder = new Border
        {
            Height = 40,
            Padding = new Thickness(20, 0, 20, 0),
            VerticalAlignment = VerticalAlignment.Center,
            HorizontalAlignment = HorizontalAlignment.Stretch,
            BorderBrush = new SolidColorBrush(Colors.Gray),
            BorderThickness = new Thickness(0, 0, 0, 1)
        };

        var titleGrid = new Grid
        {
            RowDefinitions = RowDefinitions.Parse("*")
        };


        var titleText = new TextBlock
        {
            Text = GetTitle(),
            FontSize = 16,
            VerticalAlignment = VerticalAlignment.Center,
            HorizontalAlignment = HorizontalAlignment.Left
        };

        var saveBtn = new Button
        {
            Content = "保存",
            HorizontalAlignment = HorizontalAlignment.Right,
            VerticalAlignment = VerticalAlignment.Center,
            VerticalContentAlignment = VerticalAlignment.Center,
            HorizontalContentAlignment = HorizontalAlignment.Center,
            Command = ReactiveCommand.Create(() =>
            {
                OnSaveClicked?.Invoke(this, Param);
                ToastUtil.Success("保存成功");
            }),
            Foreground = Brushes.White,
            Background = Brushes.DodgerBlue,
            Width = 80,
            Margin = new Thickness(0, 0, 10, 0)
        };

        Grid.SetRow(titleText, 0);
        Grid.SetRow(saveBtn, 0);

        titleGrid.Children.Add(titleText);
        titleGrid.Children.Add(saveBtn);
        titleBorder.Child = titleGrid;

        var scrollViewer = new ScrollViewer
        {
            MaxHeight = 500,
            VerticalScrollBarVisibility = ScrollBarVisibility.Auto
        };

        var contentWrapper = new WrapPanel
        {
            Orientation = Orientation.Horizontal
        };

        contentWrapper.Children.AddRange(GetParamItems());
        scrollViewer.Content = contentWrapper;

        stackPanel.Children.Add(titleBorder);
        stackPanel.Children.Add(scrollViewer);

        itemLayout.Child = stackPanel;

        Layout.Content = itemLayout;
    }


    private string GetTitle()
    {
        var type = Param.GetType();

        var descriptionAttribute = type.GetCustomAttribute<DescriptionAttribute>();
        var tableAttribute = type.GetCustomAttribute<TableAttribute>();
        return Title ?? descriptionAttribute?.Description ?? tableAttribute?.Name ?? type.Name;
    }

    private List<StackPanel> GetParamItems()
    {
        var context = DataContext;
        if (context.IsNullOrEmpty()) return [];

        var type = Param.GetType();
        var contextProperties = context!
            .GetType()
            .GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly);

        // 从context 中找到对应的属性
        var contextName = PathName ?? contextProperties.FirstOrDefault(p => p.PropertyType == type)?.Name;

        var properties = type
            .GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly);
        List<StackPanel> panels = [];
        foreach (var property in properties)
        {
            // 如果标记为忽略的直接跳过
            var ignore = property.GetCustomAttributes<IgnoreAttribute>();
            if (ignore.Any()) continue;

            var hide = property.GetCustomAttributes<Hide>();
            if (hide.Any()) continue;

            var descriptionAttribute = property.GetCustomAttribute<DescriptionAttribute>();
            var columnAttribute = property.GetCustomAttribute<ColumnAttribute>();
            var title = descriptionAttribute?.Description ?? columnAttribute?.Name ?? property.Name;

            var item = new StackPanel
            {
                Orientation = Orientation.Horizontal,
                MinWidth = 400,
                VerticalAlignment = VerticalAlignment.Center,
                Margin = new Thickness(20, 5, 20, 5)
            };

            var titleBlock = new TextBlock
            {
                Text = title,
                FontSize = 14,
                Width = 190,
                Margin = new Thickness(0, 0, 10, 0),
                TextWrapping = TextWrapping.Wrap,
                VerticalAlignment = VerticalAlignment.Center,
                HorizontalAlignment = HorizontalAlignment.Left
            };

            item.Children.Add(titleBlock);
            item.Children.Add(GetValueControl(property, contextName));

            panels.Add(item);
        }

        return panels;
    }

    // 根据类型不同，返回不同的控件
    private Control GetValueControl(PropertyInfo property, string? contextName)
    {
        var type = property.PropertyType.Name;
        if (type.ToLower().Contains("enum"))
        {
            type = "Enum";
        }

        var pro = property.GetCustomAttribute<Property>();

        switch (type)
        {
            case "String":
                var textBox = new TextBox
                {
                    Width = 200,
                    Height = 40,
                    IsReadOnly = pro?.IsReadOnly ?? false,
                    TextWrapping = TextWrapping.Wrap,
                    VerticalAlignment = VerticalAlignment.Center,
                    HorizontalAlignment = HorizontalAlignment.Left,
                    VerticalContentAlignment = VerticalAlignment.Center
                };
                textBox.Bind(TextBox.TextProperty, new Binding(contextName + "." + property.Name)
                {
                    Mode = BindingMode.TwoWay
                });

                if (pro != null && pro.Width != 0)
                {
                    textBox.Width = pro.Width;
                }

                if (pro != null && pro.Height != 0)
                {
                    textBox.Height = pro.Height;
                    textBox.VerticalContentAlignment = VerticalAlignment.Top;
                }

                if (pro is { IsPassword: true })
                {
                    textBox.PasswordChar = '*';
                }

                return textBox;
            case "Boolean":
                var toggleSwitch = new ToggleSwitch
                {
                    Width = 50,
                    Height = 40,
                    OnContent = "",
                    OffContent = "",
                    IsEnabled = !(pro?.IsReadOnly ?? false),
                    Cursor = new Cursor(StandardCursorType.Hand),
                    VerticalAlignment = VerticalAlignment.Center,
                    HorizontalAlignment = HorizontalAlignment.Left,
                    VerticalContentAlignment = VerticalAlignment.Center
                };
                toggleSwitch.Bind(ToggleButton.IsCheckedProperty, new Binding(contextName + "." + property.Name)
                {
                    Mode = BindingMode.TwoWay
                });
                return toggleSwitch;
            case "Enum":
                var comboBox = new ComboBox
                {
                    Width = 200,
                    Height = 40,
                    IsEnabled = !(pro?.IsReadOnly ?? false),
                    VerticalAlignment = VerticalAlignment.Center,
                    HorizontalAlignment = HorizontalAlignment.Left,
                    VerticalContentAlignment = VerticalAlignment.Center
                };

                var fields = property.PropertyType.GetFields();
                var items = fields.Select(p =>
                {
                    var description = p.GetCustomAttribute<DescriptionAttribute>();
                    return description?.Description ?? p.Name;
                }).Where(p => p != "value__").ToList();
                comboBox.ItemsSource = items;

                comboBox.Bind(SelectingItemsControl.SelectedIndexProperty,
                    new Binding(contextName + "." + property.Name)
                    {
                        Mode = BindingMode.TwoWay
                    });
                return comboBox;
            case "Int32":
            case "Int64":
                var numericUpDown = new NumericUpDown
                {
                    Width = 200,
                    Height = 40,
                    ShowButtonSpinner = false,
                    FormatString = "F0",
                    IsReadOnly = pro?.IsReadOnly ?? false,
                    VerticalAlignment = VerticalAlignment.Center,
                    HorizontalAlignment = HorizontalAlignment.Left,
                    VerticalContentAlignment = VerticalAlignment.Center
                };
                numericUpDown.Bind(NumericUpDown.ValueProperty, new Binding(contextName + "." + property.Name)
                {
                    Mode = BindingMode.TwoWay
                });
                return numericUpDown;
            case "Float":
            case "Double":
            case "Decimal":
                var format = pro?.Format ?? "0.###";
                var @decimal = new NumericUpDown
                {
                    Width = 200,
                    Height = 40,
                    ShowButtonSpinner = false,
                    FormatString = format,
                    IsReadOnly = pro?.IsReadOnly ?? false,
                    VerticalAlignment = VerticalAlignment.Center,
                    HorizontalAlignment = HorizontalAlignment.Left,
                    VerticalContentAlignment = VerticalAlignment.Center
                };
                @decimal.Bind(NumericUpDown.ValueProperty, new Binding(contextName + "." + property.Name)
                {
                    Mode = BindingMode.TwoWay
                });
                return @decimal;
            default:
                var defalutText = new TextBox
                {
                    Width = 200,
                    Height = 40,
                    IsReadOnly = pro?.IsReadOnly ?? false,
                    TextWrapping = TextWrapping.Wrap,
                    VerticalAlignment = VerticalAlignment.Center,
                    HorizontalAlignment = HorizontalAlignment.Left,
                    VerticalContentAlignment = VerticalAlignment.Center
                };
                defalutText.Bind(TextBox.TextProperty, new Binding(contextName + "." + property.Name)
                {
                    Mode = BindingMode.TwoWay
                });
                return defalutText;
        }
    }
}