using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using TINK.Model.Bike;
using TINK.Model.Bike.BluetoothLock;
using TINK.Services.BluetoothLock.Tdo;
using TINK.Model.State;
using System;

namespace TINK.Services.BluetoothLock
{
    /// <summary>
    /// Facke 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 attemps 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<BikeInfo>())
            {
                var lockInfo = bikeInfo.LockInfo;

                switch (bikeInfo.State.Value)
                {
                    case InUseStateEnum.Disposable:
                        switch (lockInfo.State )
                        {
                            case LockingState.Open:
                            case LockingState.Disconnected:
                            case LockingState.Unknown:
                                // 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.Disconnected:
                            case LockingState.Unknown:
                                // 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.Disconnected:
                            case LockingState.Unknown:
                                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.Disconnected);
    }
}