using System;
using System.Text.RegularExpressions;
using System.Collections.Generic;
using Xceed.Wpf.Toolkit.PropertyGrid.Attributes;

namespace CtrEditor.FuncionesBase
{
    public class TagPattern
    {
        public const string DEFAULT_PATTERN = "DESCRIPCION";

        private static readonly Dictionary<string, string> _patternDescriptions = new Dictionary<string, string>
        {
            { "Descripcion", "First letter capitalized" },
            { "DESCRIPCION", "All uppercase text" },
            { "Siemens IO Input", "Format: Exxxxx.y (x: 0-65535, y: 0-7)" },
            { "Siemens IO Output", "Format: Axxxxx.y (x: 0-65535, y: 0-7)" },
            { "LETRASNUMEROS", "Format: ABC...123... (1-10 letters + numbers)" },
            { "Numero", "Numeric value" }
        };

        public static List<string> GetPatternList()
        {
            return new List<string>(_patternDescriptions.Keys);
        }

        public static string ApplyPattern(string text, string pattern)
        {
            if (string.IsNullOrEmpty(text)) return text;

            return pattern switch
            {
                "Descripcion" => ApplyDescripcionPattern(text),
                "DESCRIPCION" => text.ToUpper(),
                "Siemens IO Input" => ApplySiemensPattern(text, "E"),
                "Siemens IO Output" => ApplySiemensPattern(text, "A"),
                "LETRASNUMEROS" => ApplyLetrasNumerosPattern(text),
                "Numero" => ApplyNumberPattern(text),
                _ => text
            };
        }

        private static string ApplyDescripcionPattern(string text)
        {
            if (string.IsNullOrEmpty(text)) return text;
            return char.ToUpper(text[0]) + (text.Length > 1 ? text.Substring(1).ToLower() : "");
        }

        private static string ApplySiemensPattern(string text, string prefix)
        {
            var match = Regex.Match(text, $"{prefix}?(\\d{{1,5}})\\.?(\\d)?", RegexOptions.IgnoreCase);
            if (match.Success)
            {
                int address = Math.Min(int.Parse(match.Groups[1].Value), 65535);
                int bit = match.Groups[2].Success ? 
                    Math.Min(int.Parse(match.Groups[2].Value), 7) : 0;
                return $"{prefix}{address}.{bit}";
            }
            return $"{prefix}0.0"; // Default value if pattern doesn't match
        }

        private static string ApplyLetrasNumerosPattern(string text)
        {
            // Extract letters and numbers from the text
            var letters = new string(text.Where(c => char.IsLetter(c)).Take(10).ToArray());
            var numbers = new string(text.Where(c => char.IsDigit(c)).ToArray());

            // If no letters found, return "A" as default
            if (string.IsNullOrEmpty(letters))
                letters = "A";

            // If no numbers found, return "0" as default
            if (string.IsNullOrEmpty(numbers))
                numbers = "0";

            // Combine letters (uppercase) and numbers
            return $"{letters.ToUpper()}{numbers}";
        }

        private static string ApplyNumberPattern(string text)
        {
            var match = Regex.Match(text, @"-?\d+\.?\d*");
            return match.Success ? match.Value : "0";
        }
    }

    public class TagPatternItemsSource<T> : IItemsSource
    {
        public ItemCollection GetValues()
        {
            ItemCollection items = new ItemCollection();
            foreach (string pattern in TagPattern.GetPatternList())
            {
                items.Add(pattern);
            }
            return items;
        }
    }
}