using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media;

namespace XP.ImageProcessing.RoiControl
{
    /// <summary>
    /// 将Point列表转换为PointCollection，支持ObservableCollection变化通知
    /// </summary>
    public class PointListToPointCollectionConverter : IValueConverter
    {
        public object? Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is List<Point> pointList)
            {
                return new PointCollection(pointList);
            }
            else if (value is ObservableCollection<Point> observablePoints)
            {
                var pointCollection = new PointCollection(observablePoints);
                return pointCollection;
            }
            else if (value is IEnumerable<Point> enumerable)
            {
                return new PointCollection(enumerable);
            }
            return new PointCollection();
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is PointCollection pointCollection)
            {
                var list = new ObservableCollection<Point>();
                foreach (Point p in pointCollection)
                {
                    list.Add(p);
                }
                return list;
            }
            return new ObservableCollection<Point>();
        }
    }

    /// <summary>
    /// 索引转换为位置标�?
    /// </summary>
    public class IndexToPositionConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is int index)
            {
                return (index + 1).ToString();
            }
            return "0";
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}