using Aurora.View;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WeldingCommon.Utils.Diff
{
    public sealed class PropertyDiff : NotifyPropertyChangedBase
    {

        public string Name { get => _name; set => SetProperty(ref _name, value); }
        private string _name;

        public object OldValue { get => _oldValue; set => SetProperty(ref _oldValue, value); }
        private object _oldValue;

        public object NewValue { get => _newValue; set => SetProperty(ref _newValue, value); }
        private object _newValue;

        public string OldText { get => _oldText; set => SetProperty(ref _oldText, value); }
        private string _oldText;

        public string NewText { get => _newText; set => SetProperty(ref _newText, value); }
        private string _newText;

        public PropertyDiff(string name, object oldValue, object newValue, Func<object, string> formatter = null)
        {
            _name = name ?? "";
            _oldValue = oldValue;
            _newValue = newValue;

            var fmt = formatter ?? DefaultFormat;
            _oldText = fmt(oldValue);
            _newText = fmt(newValue);
        }

        private static string DefaultFormat(object v)
        {
            if (v == null) return "(null)";
            if (v is DateTime dt) return dt.ToString("yyyy-MM-dd HH:mm:ss");
            return v.ToString();
        }

        public override string ToString()
            => $"{Name}: {OldText} -> {NewText}";
    }
}