using System;
using System.Collections.Generic;
using System.Linq;

namespace TINK.Model.User.Account
{
	/// <summary> Specifies extra user permissions. </summary>
	[Flags]
	public enum Permissions
	{
		None = 0, // No extra permissions.
		PickCopriServer = 2, // Allows user to switch COPRI server.
		ManageCopriCacheExpiration = 4, // Allows to manage the live time of COPRI cache entries.
		ManagePolling = 8, // Turn polling off or on and set polling frequency.
		PickLockServiceImplementation = 16, // Allows to pick the implementation which controls bluetooth lock management.
		PickLocationServiceImplementation = 32, // Allows to pick the implementation which gets location information.
		PickLoggingLevel = 64, // Allows to select the logging level.
		ShowDiagnostics = 128, // Turns on display of diagnostics.
		SwitchNoSiteCaching = 1024, // Allows to turn off/ on caching of  sites displayed in app hosted by COPRI
		ReportLevel = 2048, // Allows extent to show error messages.
		SwitchTheme = 4096, // Allows user to switch theme (sharee.bike, Mein konrad, LastenRad Bayern)
		All = PickCopriServer +
			ManageCopriCacheExpiration +
			ManagePolling +
			PickLockServiceImplementation +
			PickLocationServiceImplementation +
			PickLoggingLevel +
			ShowDiagnostics +
			SwitchNoSiteCaching +
			ReportLevel +
			SwitchTheme,
	}

	/// <summary>
	/// Specifies parts of account data. 
	/// </summary>
	/// <remarks>
	/// Usage: Account can be valid (user and password set) partly valid or completely invalid.
	/// </remarks>
	[Flags]
	public enum Elements
	{
		None = 0,
		Mail = 1,
		Password = 2,
		Account = Mail + Password
	}

	/// <summary>
	/// Holds account data.
	/// </summary>
	public class Account : IAccount
	{
		public const bool DEFAULTISAGBACKNOWLEDGED = false;

		/// <summary> Constructs an account object.</summary>
		/// <param name="mail">Mail address of the account holder.</param>
		/// <param name="password">Password.</param>
		/// <param name="sessionCookie">Session cookie from copri.</param>
		/// <param name="bikeGroup">Group holding info about Group (TINK, Konrad, ...)</param>
		/// <param name="p_iDebugLevel">Flag which controls display of debug settings.</param>
		public Account(
			string mail,
			string password,
			bool isAgbAcknowledged,
			string sessionCookie,
			IEnumerable<string> bikeGroup,
			Permissions debugLevel = Permissions.None)
		{
			Mail = mail;
			Pwd = password;
			IsAgbAcknowledged = isAgbAcknowledged;
			SessionCookie = sessionCookie;
			DebugLevel = debugLevel;
			Group = bikeGroup != null
				? new HashSet<string>(bikeGroup).ToList()
				: throw new ArgumentException("Can not instantiate account object. Reference to group list must not be empty.");
		}

		public Account(IAccount source) : this(source?.Mail, source?.Pwd, source?.IsAgbAcknowledged ?? DEFAULTISAGBACKNOWLEDGED, source?.SessionCookie, source?.Group, source?.DebugLevel ?? Permissions.None)
		{
		}

		/// <summary>Mail address of the account holder.</summary>
		public string Mail { get; }

		/// <summary>Password of to authenticate.</summary>
		public string Pwd { get; }

		/// <summary>True if user acknowledged AGBs.</summary>
		public bool IsAgbAcknowledged { get; }

		/// <summary>Session cookie used to sign in to copri.</summary>
		public string SessionCookie { get; }

		/// <summary>Debug level used to determine which features are available.</summary>
		public Permissions DebugLevel { get; }

		/// <summary> Holds the group of the bike (TINK, Konrad, ...).</summary>
		public IEnumerable<string> Group { get; }
	}
}