using System.Collections.Generic;
using System.Linq;
using TINK.Model.Bikes.BikeInfoNS;

namespace TINK.Model.Connector.Updater
{
	public static class RentalDescriptionFactory
	{
		/// <summary>
		/// Creates rental description object from JSON- tariff description object.
		/// </summary>
		/// <param name="rentalDesciption">Source JSON object.</param>
		/// <returns>Tariff description object.</returns>

		public static RentalDescription Create(this Repository.Response.RentalDescription rentalDesciption)
		{
			RentalDescription.TariffElement CreateTarifEntry(string[] elementValue) =>
				new RentalDescription.TariffElement
					{
						Description = elementValue != null && elementValue.Length > 0 ? elementValue[0] : string.Empty,
						Value = elementValue != null && elementValue.Length > 1 ? elementValue[1] : string.Empty,
					};

			RentalDescription.InfoElement CreateInfoElement(string[] elementValue) => 
				new RentalDescription.InfoElement
				{
					Key = elementValue != null && elementValue.Length > 0 ? elementValue[0] : string.Empty,
					Value = elementValue != null && elementValue.Length > 1 ? elementValue[1] : string.Empty,
				};

			// Read tariff elements.
			var tarifEntries = rentalDesciption?.tarif_elements != null
					? rentalDesciption.tarif_elements.Select(x => new
					{
						x.Key,
						Value = CreateTarifEntry(x.Value)
					}).ToLookup(x => x.Key, x => x.Value).ToDictionary(x => x.Key, x => x.First())
					: new Dictionary<string, RentalDescription.TariffElement>();

			// Read info elements.
			var InfoEntries = rentalDesciption?.rental_info != null
				? rentalDesciption.rental_info.Select(x => new
				{
					x.Key,
					Value = CreateInfoElement(x.Value)
				}).ToLookup(x => x.Key, x => x.Value).ToDictionary(x => x.Key, x => x.First())
				: new Dictionary<string, RentalDescription.InfoElement>();

			var bike = new RentalDescription
			{
				Name = rentalDesciption?.name ?? string.Empty,
				Id = int.TryParse(rentalDesciption?.id ?? string.Empty, out int number) ? number : (int?)null,
				MaxReservationTimeSpan = rentalDesciption.GetMaxReservationTimeSpan(),
				TariffEntries = tarifEntries,
				InfoEntries = InfoEntries
			};

			return bike;
		}
	}
}