using System;
using ShareeBike.Model.Device;
using ShareeBike.Model.Services.CopriApi;
using ShareeBike.Repository;

namespace ShareeBike.Model.Connector
{
	/// <summary>
	/// Connects app to copri data by getting data from cache.
	/// </summary>
	public class ConnectorCache : IConnector
	{
		/// <summary>Constructs a copri connector object to connect to cache.</summary>
		/// <remarks>Used for offline scenario to ensure responsiveness of app by preventing hopeless tries to communicate with COPRI. </remarks>
		/// <param name="uiIsoLangugageName">Two letter ISO language name.</param>
		/// <param name="sessionCookie"> Holds the session cookie.</param>
		/// <param name="mail">Mail of user.</param>
		/// <param name="smartDevice">Holds info about smart device.</param>
		/// <param name="server"> Is null in production and might be a mock in testing context.</param>
		public ConnectorCache(
			AppContextInfo appContextInfo,
			string uiIsoLangugageName,
			string sessionCookie,
			string mail,
			ISmartDevice smartDevice = null,
			ICopriServer server = null)
		{
			Command = Connector.CreateCommand(
				server ?? new CopriProviderMonkeyStore(appContextInfo.MerchantId, uiIsoLangugageName, sessionCookie, smartDevice),
				sessionCookie,
				mail);

			Query = GetQuery(
				server ?? new CopriProviderMonkeyStore(appContextInfo.MerchantId, uiIsoLangugageName, sessionCookie, smartDevice),
				sessionCookie,
				mail);
		}

		/// <summary> Object for querying stations and bikes.</summary>
		public ICommand Command { get; private set; }

		/// <summary> Object for querying stations and bikes.</summary>
		public IQuery Query { get; private set; }

		/// <summary> True if connector has access to copri server, false if cached values are used. </summary>
		public bool IsConnected => Command.IsConnected;

		/// <summary> Gets a command object to perform copri queries. </summary>
		private static IQuery GetQuery(ICopriServer copri, string sessioncookie, string mail) => string.IsNullOrEmpty(sessioncookie)
							? new Query(copri) as IQuery
							: new QueryLoggedIn(copri, sessioncookie, mail, () => DateTime.Now);
	}
}