using System.Text.RegularExpressions;
using Microsoft.AspNetCore.Http.Extensions;

namespace RhSolutions.Api.Services
{
    public class PipeQueryModifier : IProductQueryModifier
	{
		protected virtual string diameterPattern { get; } = @"([\b\D]|^)(?<Diameter>16|20|25|32|40|50|63)([\b\D]|$)";
		protected virtual string typePattern { get; } = @"бухт|отр|штанг";
		protected virtual string pipeName { get; } = "Flex";
		protected virtual Dictionary<string, string> diameterNames { get; } = new()
		{
			["16"] = "16x2,2",
			["20"] = "20x2,8",
			["25"] = "25x3,5",
			["32"] = "32x4,4",
			["40"] = "40x5,5",
			["50"] = "50x6,9",
			["63"] = "63x8,6"
		};		
		
		protected virtual Dictionary<string, string> makeUpNames { get; } = new()
		{
			["бухт"] = "бухта",
			["штанг"] = "прям.отрезки",
			["отр"] = "прям.отрезки"
		};

		public bool TryQueryModify(IQueryCollection collection, out QueryString queryString)
		{
			queryString = QueryString.Empty;
			string query = collection["query"].ToString();
			if (string.IsNullOrEmpty(query))
			{
				return false;
			}
			
			var diameterMatches = Regex.Matches(query, diameterPattern);
			if (diameterMatches.Count == 0)
			{
				return false;
			}
			
			var typeMatches = Regex.Matches(query, typePattern);
			var diameter = diameterMatches.First().Groups["Diameter"].Value;
			string? type = typeMatches.FirstOrDefault()?.Value;
			
			string result = 
				$"Труба {pipeName} {diameterNames[diameter]} {(type != null ? makeUpNames[type] : int.Parse(diameter) < 32 ? makeUpNames["бухт"] : makeUpNames["отр"])}";
			
			QueryBuilder qb = new()
			{
				{ "query", result }
			};
			queryString = qb.ToQueryString();
			return true;
		}
	}
}