/*
  * Copyright (c) 2022 LG Electronics Inc.
  * SPDX-License-Identifier: LicenseRef-LGE-Proprietary
  */
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Converters;
using System.Windows.Data;

namespace AuroraUIComponent.UIConverter
{
    public class IndexConverter : IValueConverter
    {
        public string Prefix { get; set; } = string.Empty;
        public string Postfix { get; set; } = string.Empty;
        public int Offset { get; set; } = 1;
        public int IndexDigit { get; set; } = -1;

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            int intVal = -1;
            if (value is int index) {
                intVal = index;
            } else {
                try {
                    intVal = (int)value;
                } catch (Exception ex) {
                    return value;
                }
            }

            if (IndexDigit < 0) {
                return Prefix + (intVal + Offset).ToString() + Postfix;
            } else {
                //return Prefix + (index + Offset).ToString($"N{IndexDigit}") + Postfix;
                return Prefix + (intVal + Offset).ToString($"D{IndexDigit}") + Postfix;
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is string strValue) {
                if (!string.IsNullOrEmpty(Prefix) && strValue.Contains(Prefix)) {
                    strValue = strValue.Replace(Prefix, string.Empty);
                }
                if (!string.IsNullOrEmpty(Postfix) && strValue.Contains(Postfix)) {
                    strValue = strValue.Replace(Postfix, string.Empty);
                }
                if (int.TryParse(strValue, out int intValue)) {
                    return intValue - Offset;
                }
            }

            return value;
        }
    }
}