using System.Text.RegularExpressions;

namespace RhSolutions.Services;

public class SleevesCalculator : ISleevesCalculator
{
    private const string doublePattern =
        @"((?i)равнопроходная|угольник\s+90|угольник\s+45|Т-образная|Комплект\s+трубок(?i))(.+?\b(?<Sleeve>16|20|25|32|40|50|63)\b)+";
    private const string singlePattern =
        @"((?i)муфта|тройник|переходник|угольник|штуцер|Г-образная|заглушка(?i))(.+?\b(?<Sleeve>16|20|25|32|40|50|63)\b)+";

    public Dictionary<Product, double> CalculateSleeves(Dictionary<Product, double> products)
    {
        Dictionary<string, double> result = new()
        {
            ["16"] = 0,
            ["20"] = 0,
            ["25"] = 0,
            ["32"] = 0,
            ["40"] = 0,
            ["50"] = 0,
            ["63"] = 0,
        };
        var rautitanProducts = products.Where(kvp => kvp.Key.ProductLines.Contains("RAUTITAN"));

        foreach (var kvp in rautitanProducts)
        {
            var doubleCollection = Regex.Matches(kvp.Key.Name, doublePattern);
            if (doubleCollection.Count != 0)
            {
                CaptureCollection collection = doubleCollection[0].Groups["Sleeve"].Captures;
                foreach (Capture sleeve in collection)
                {
                    result[sleeve.Value] += kvp.Value * 2;
                }
                continue;
            }
            var singleCollection = Regex.Matches(kvp.Key.Name, singlePattern);
            if (singleCollection.Count != 0)
            {
                CaptureCollection collection = singleCollection[0].Groups["Sleeve"].Captures;
                foreach (Capture sleeve in collection)
                {
                    result[sleeve.Value] += kvp.Value;
                }
            }
        }

        return result
            .ToDictionary(kvp =>
        kvp.Key switch
        {
            "16" => new Product("11600011001"),
            "20" => new Product("11600021001"),
            "25" => new Product("11600031001"),
            "32" => new Product("11600041001"),
            "40" => new Product("11600051001"),
            "50" => new Product("11397711002"),
            "63" => new Product("11397811002"),
            _ => throw new Exception($"Неизвестный диаметр {kvp.Key}")
        }, kvp => kvp.Value);
    }
}