using System.Text.RegularExpressions;

namespace RhSolutions.Models
{
    internal class Sku
    {
        public string Article { get; private set; }
        public string Variant { get; private set; }

        public Sku(string article, string variant)
        {
            Article = article;
            Variant = variant;
        }

        public static bool TryParse(string line, out Sku rehauSku)
        {
            Match match;
            match = Regex.Match(line, @"\b[1]\d{6}[1]\d{3}\b");
            if (match.Success)
            {
                string sku = match.Value.Substring(1, 6);
                string variant = match.Value.Substring(8, 3);
                rehauSku = new Sku(sku, variant);
                return true;
            }

            match = Regex.Match(line, @"\b\d{6}\D\d{3}\b");
            if (match.Success)
            {
                string sku = match.Value.Substring(0, 6);
                string variant = match.Value.Substring(7, 3);
                rehauSku = new Sku(sku, variant);
                return true;
            }

            match = Regex.Match(line, @"\b\d{9}\b");
            if (match.Success)
            {
                string sku = match.Value.Substring(0, 6);
                string variant = match.Value.Substring(6, 3);
                rehauSku = new Sku(sku, variant);
                return true;
            }

            match = Regex.Match(line, @"\b\d{6}\b");
            if (match.Success)
            {
                string sku = match.Value.Substring(0, 6);
                string variant = "001";
                rehauSku = new Sku(sku, variant);
                return true;
            }

            else
            {
                rehauSku = null;
                return false;
            }
        }

        public override string ToString()
        {
            return $"1{Article}1{Variant}";
        }
    }
}