using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Serilog;
using ShareeBike.Model.Bikes;
using ShareeBike.Model.Connector.Updater;
using ShareeBike.Model.Services.CopriApi;
using ShareeBike.Repository;
using ShareeBike.Services.CopriApi;
using BikeInfo = ShareeBike.Model.Bikes.BikeInfoNS.BC.BikeInfo;

namespace ShareeBike.Model.Connector
{
	/// <summary> Provides query functionality from cache without login. </summary>
	public class Query : Base, IQuery
	{
		/// <summary> Cached copri server. </summary>
		private readonly ICopriServer server;

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

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

			return new Result<StationsAndBikesContainer>(
				typeof(CopriCallsMonkeyStore),
				new StationsAndBikesContainer(
					stationsAllResponse.GetStationsAllMutable(),
					new BikeCollection() /* There are no bikes occupied because user is not logged in. */),
				stationsAllResponse.GetGeneralData());
		}

		/// <summary> Gets bikes occupied. </summary>
		/// <returns>Collection of bikes.</returns>
		public async Task<Result<BikeCollection>> GetBikesOccupiedAsync()
		{
			Log.ForContext<Query>().Error("Unexpected call to get be bikes occupied detected. No user is logged in.");
			return new Result<BikeCollection>(
				typeof(CopriCallsMonkeyStore),
				await Task.FromResult(new BikeCollection(new Dictionary<string, BikeInfo>())),
				new GeneralData(),
				new Exception("Abfrage der reservierten/ gebuchten Räder fehlgeschlagen. Kein Benutzer angemeldet."));
		}

		/// <summary> Gets 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);
			return new Result<BikeCollection>(
				typeof(CopriCallsMonkeyStore),
				bikesAvailableResponse != null
					? bikesAvailableResponse.GetBikesAvailable(Bikes.BikeInfoNS.BC.DataSource.Cache)
					: await Task.FromResult(new BikeCollection(new Dictionary<string, BikeInfo>())),
				bikesAvailableResponse?.GetGeneralData());
		}
	}
}