using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Layout;
using Avalonia.Media;
using Sln.Wcs.UI.ViewModels.Base;

namespace Sln.Wcs.UI.Views.Base;

public partial class EntityEditWindow : Window
{
    private object? _entity;
    private TaskCompletionSource<bool>? _tcs;

    public EntityEditWindow()
    {
        InitializeComponent();
        CancelBtn.Click += (_, _) => CloseWith(false);
        SaveBtn.Click += (_, _) => CloseWith(true);
    }

    public Task<bool> ShowDialog(object entity, List<FieldConfig> fields, bool isEdit, Window owner)
    {
        _entity = entity;
        TitleText.Text = isEdit ? "编辑" : "新增";
        BuildForm(fields);
        _tcs = new TaskCompletionSource<bool>();
        ShowDialog(owner);
        return _tcs.Task;
    }

    private void BuildForm(List<FieldConfig> fields)
    {
        FormPanel.Children.Clear();
        if (_entity is null) return;
        var type = _entity.GetType();

        foreach (var field in fields)
        {
            var prop = type.GetProperty(field.PropertyName);
            if (prop is null) continue;
            var value = prop.GetValue(_entity);

            // 字段卡片
            var cell = new Border
            {
                Width = 345,
                Padding = new Thickness(12, 6),
                Margin = new Thickness(0, 3),
            };

            var row = new Grid { ColumnDefinitions = new ColumnDefinitions("90,*") };

            // 标签
            var label = new TextBlock
            {
                Text = field.DisplayName,
                FontSize = 12,
                Foreground = Brush.Parse("#7B8FA8"),
                VerticalAlignment = VerticalAlignment.Center,
            };
            row.Children.Add(label);

            // 输入框
            Control input;
            if (field.FieldType == FieldType.CheckBox)
            {
                var cb = new CheckBox
                {
                    IsChecked = value is int iv ? iv == 1 : (value as bool? ?? false),
                    IsEnabled = !field.IsReadOnly,
                    Foreground = Brush.Parse("#BCC8D6"),
                    VerticalAlignment = VerticalAlignment.Center,
                };
                cb.IsCheckedChanged += (_, _) =>
                    prop.SetValue(_entity, cb.IsChecked == true ? 1 : 0);
                input = cb;
            }
            else
            {
                var tb = new TextBox
                {
                    Text = value?.ToString() ?? "",
                    IsReadOnly = field.IsReadOnly,
                    Watermark = field.DisplayName,
                    Background = Brush.Parse("#0A0E14"),
                    Foreground = Brush.Parse("#DDE4F0"),
                    BorderBrush = Brush.Parse("#1A2F4A"),
                    BorderThickness = new Thickness(1),
                    CornerRadius = new CornerRadius(3),
                    Padding = new Thickness(8, 5),
                    FontSize = 12,
                };
                if (field.FieldType == FieldType.Number)
                {
                    tb.TextChanged += (_, _) =>
                    {
                        if (int.TryParse(tb.Text, out var num))
                            prop.SetValue(_entity, num);
                    };
                }
                else
                {
                    tb.TextChanged += (_, _) =>
                        prop.SetValue(_entity, tb.Text);
                }
                input = tb;
            }
            Grid.SetColumn(input, 1);
            row.Children.Add(input);

            cell.Child = row;
            FormPanel.Children.Add(cell);
        }
    }

    private void CloseWith(bool result)
    {
        _tcs?.TrySetResult(result);
        Close();
    }
}