using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using ShareeBike.Model.Bikes;
using ShareeBike.Model.Connector.Updater;
using ShareeBike.Model.Services.CopriApi;
using ShareeBike.Repository;
using ShareeBike.Repository.Response;

namespace ShareeBike.Model.Connector
{
	/// <summary> Provides query functionality from cache for a logged in user. </summary>
	public class QueryLoggedIn : BaseLoggedIn, IQuery
	{
		/// <summary> Copri server. </summary>
		private readonly ICopriServer server;

		/// <summary>Constructs a copri query object.</summary>
		/// <param name="copriServer">Server which implements communication.</param>
		public QueryLoggedIn(ICopriServerBase copriServer,
			string sessionCookie,
			string mail,
			Func<DateTime> dateTimeProvider) : base(copriServer, sessionCookie, mail, dateTimeProvider)
		{
			server = copriServer as ICopriServer;
			if (server == null)
			{
				throw new ArgumentException($"Copri server is not of expected type. Type detected is {copriServer.GetType()}.");
			}

			server = copriServer as ICopriServer;
		}

		/// <summary> Gets all stations including positions.</summary>
		public async Task<Result<StationsAndBikesContainer>> GetBikesAndStationsAsync()
		{
			var stationResponse = await server.GetStationsAsync();

			return new Result<StationsAndBikesContainer>(
				typeof(CopriCallsMonkeyStore),
				new StationsAndBikesContainer(
					stationResponse.GetStationsAllMutable(),
					BikeCollectionFactory.GetBikesAll(
						null, // Bikes available are no more of interest because count of available bikes at each given station is was added to station object. 
						stationResponse.bikes_occupied?.Values ?? new Dictionary<string, BikeInfoReservedOrBooked>().Values,
						Mail,
						DateTimeProvider,
						Bikes.BikeInfoNS.BC.DataSource.Cache)),
				stationResponse.GetGeneralData());
		}

		/// <summary> Gets bikes occupied and bikes for which feedback is required. </summary>
		/// <returns>Collection of bikes.</returns>
		public async Task<Result<BikeCollection>> GetBikesOccupiedAsync()
		{
			var bikesFeedbackRequired = await server.GetBikesAvailableAsync();
			var bikesOccupiedResponse = await server.GetBikesOccupiedAsync();

			return new Result<BikeCollection>(
				typeof(CopriCallsMonkeyStore),
				BikeCollectionFactory.GetBikesAll(
					bikesFeedbackRequired.bikes?.Values?.Select(bike => bike)?.Where(bike => bike.GetState() == State.InUseStateEnum.FeedbackPending),
					bikesOccupiedResponse?.bikes_occupied?.Values,
					Mail,
					DateTimeProvider,
					Bikes.BikeInfoNS.BC.DataSource.Cache),
				bikesOccupiedResponse.GetGeneralData());
		}

		/// <summary> Gets bikes available and bikes occupied. </summary>
		/// <param name="operatorUri">Uri of the operator host to get bikes from or null if bikes have to be gotten form primary host.</param>
		/// <param name="stationId"> Id of station which is used for filtering bikes. Null if no filtering should be applied.</param>
		/// <param name="bikeId"> Id of bike which is used for filtering bikes. Null if no filtering should be applied.</param>
		/// <returns>Collection of bikes.</returns>
		public async Task<Result<BikeCollection>> GetBikesAsync(Uri operatorUri = null, string stationId = null, string bikeId = null)
		{
			var bikesAvailableResponse = await server.GetBikesAvailableAsync(operatorUri, stationId, bikeId);

			if (operatorUri?.AbsoluteUri != null)
			{
				return new Result<BikeCollection>(
					typeof(CopriCallsMonkeyStore),
					BikeCollectionFactory.GetBikesAll(
						bikesAvailableResponse?.bikes?.Values,
						bikesAvailableResponse?.bikes_occupied?.Values,
						Mail,
						DateTimeProvider,
						Bikes.BikeInfoNS.BC.DataSource.Cache),
					bikesAvailableResponse?.GetGeneralData());
			}

			var bikesOccupiedResponse = await server.GetBikesOccupiedAsync();

			return new Result<BikeCollection>(
				typeof(CopriCallsMonkeyStore),
				BikeCollectionFactory.GetBikesAll(
					bikesAvailableResponse?.bikes?.Values,
					bikesOccupiedResponse?.bikes_occupied?.Values,
					Mail,
					DateTimeProvider,
					Bikes.BikeInfoNS.BC.DataSource.Cache),
				bikesAvailableResponse?.GetGeneralData());
		}
	}
}