using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using ShareeBike.Model.Bikes;
using ShareeBike.Model.Bikes.BikeInfoNS.BluetoothLock;
using ShareeBike.Model.State;
using ShareeBike.Services.BluetoothLock.Tdo;

namespace ShareeBike.Services.BluetoothLock
{
	/// <summary>
	/// Fake locks service implementation which simulates locks which are in reach.
	/// </summary>
	public class LocksServiceInReach : ILocksServiceFake
	{
		private IEnumerable<LockInfoTdo> LocksInfo { get; set; } = new List<LockInfoTdo>();

		/// <summary> Holds timeout values for series of connecting attempts to a lock or multiple locks. </summary>
		public ITimeOutProvider TimeOut { get; set; }

		/// <summary> Connects to lock.</summary>
		/// <param name="authInfo"> Info required to connect to lock.</param>
		/// <param name="connectTimeout">Timeout for connect operation.</param>
		public async Task<LockInfoTdo> ConnectAsync(LockInfoAuthTdo authInfo, TimeSpan connectTimeout)
		{
			return await Task.FromResult(new LockInfoTdo.Builder { Id = authInfo.Id, Guid = authInfo.Guid, State = LockitLockingState.Closed }.Build());
		}

		/// <param name="connectTimeout">Timeout for connect operation of a single lock.</param>
		public async Task<IEnumerable<LockInfoTdo>> GetLocksStateAsync(IEnumerable<LockInfoAuthTdo> locksInfo, TimeSpan connectTimeout)
		{
			return await Task.FromResult(LocksInfo);
		}

		public void UpdateSimulation(BikeCollection bikes)
		{
			var locksInfo = new List<LockInfoTdo>();

			// Add and process locks info object
			foreach (var bikeInfo in bikes.OfType<Model.Bikes.BikeInfoNS.BluetoothLock.BikeInfo>())
			{
				var lockInfo = bikeInfo.LockInfo;

				switch (bikeInfo.State.Value)
				{
					case InUseStateEnum.Disposable:
					case InUseStateEnum.FeedbackPending:    // State feedback pending does not exist for bluetooth locks but matches from bluetooth perspective state disposable.
						switch (lockInfo.State)
						{
							case LockingState.Open:
							case LockingState.UnknownDisconnected:
							case LockingState.UnknownFromHardwareError:
								// Open bikes are never disposable because as soon as a they are open they get booked.
								if (LocksInfo.FirstOrDefault(x => x.Id == lockInfo.Id) != null)
								{
									continue; // Lock was already added.
								}
								locksInfo.Add(new LockInfoTdo.Builder { Id = lockInfo.Id, State = LockitLockingState.Closed }.Build());
								break;
						}
						break;

					case InUseStateEnum.Reserved:
						switch (lockInfo.State)
						{
							case LockingState.Open:
							case LockingState.UnknownDisconnected:
							case LockingState.UnknownFromHardwareError:
								// Closed bikes are never reserved because as soon as they are open they get booked.
								if (LocksInfo.FirstOrDefault(x => x.Id == lockInfo.Id) != null)
								{
									continue; // Lock was already added.
								}
								locksInfo.Add(new LockInfoTdo.Builder { Id = lockInfo.Id, State = LockitLockingState.Closed }.Build());
								break;
						}
						break;

					case InUseStateEnum.Booked:
						switch (lockInfo.State)
						{
							case LockingState.UnknownDisconnected:
							case LockingState.UnknownFromHardwareError:
								if (LocksInfo.FirstOrDefault(x => x.Id == lockInfo.Id) != null)
								{
									continue; // Lock was already added.
								}
								locksInfo.Add(new LockInfoTdo.Builder { Id = lockInfo.Id, State = LockitLockingState.Closed }.Build());
								break;
						}
						break;
				}

				LocksInfo = locksInfo;
			}
		}

		/// <summary> Opens a lock.</summary>
		/// <param name="lockId">Id of lock to open.</param>
		public async Task<LockitLockingState?> OpenAsync(int bikeId, byte[] copriKey)
		{
			return await Task.FromResult(LockitLockingState.Open);
		}

		/// <summary> Closes a lock.</summary>
		/// <param name="lockId">Id of lock to close.</param>
		public async Task<LockitLockingState?> CloseAsync(int bikeId, byte[] copriKey)
		{
			return await Task.FromResult(LockitLockingState.Closed);
		}

		/// <summary> Set sound settings.</summary>
		/// <param name="lockId">Id of lock to set sound settings.</param>
		public async Task<bool> SetSoundAsync(int lockId, SoundSettings settings)
		{
			return await Task.FromResult(true);
		}

		/// <summary> Sets whether alarm is on or off.</summary>
		/// <param name="lockId">Id of lock to get info from.</param>
		public async Task SetIsAlarmOffAsync(int lockId, bool activated)
		{
			await Task.FromResult(true);
		}

		/// <summary> Gets battery percentage.</summary>
		/// <param name="lockId">Id of lock to get info for.</param>
		public Task<double> GetBatteryPercentageAsync(int lockId)
		{
			throw new NotSupportedException();
		}

		/// <summary> Gets whether alarm is on or off.</summary>
		/// <param name="lockId">Id of lock to get info for.</param>
		public async Task<bool> GetIsAlarmOffAsync(int lockId)
		{
			return await Task.FromResult(true);
		}

		/// <summary>Gets a lock by bike Id.</summary>
		/// <param name="bikeId"></param>
		/// <returns>Lock object</returns>
		public ILockService this[int bikeId]
		{
			get
			{
				return null;
			}
		}


		/// <summary> Disconnects lock.</summary>
		/// <param name="bikeId"> Id of lock to disconnect.</param>
		/// <param name="bikeGuid"> Guid of lock to disconnect.</param>
		public async Task<LockingState> DisconnectAsync(int bikeId, Guid bikeGuid) => await Task.FromResult(LockingState.UnknownDisconnected);
	}
}