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

namespace TINK.Model.Bikes
{
	public static class BikeCollectionUpdater
	{
		/// <summary> Updates bikes lock info with the latest lock info from bluetooth service.</summary>
		/// <param name="bikes">bikes to be updated.</param>
		/// <param name="locksInfo">locks info to be used for updating bikes.</param>
		/// <returns></returns>
		public static BikeCollection UpdateLockInfo(
			this BikeCollection bikes,
			IEnumerable<Bikes.BikeInfoNS.BluetoothLock.LockInfo> locksInfo)
		{

			var updatedBikesCollection = new Dictionary<string, Bikes.BikeInfoNS.BC.BikeInfo>();

			foreach (var bikeInfo in bikes)
			{
				if (!(bikeInfo is BikeInfoNS.BluetoothLock.BikeInfo bluetoothBikeInfo))
				{
					// No processing needed because bike is not a bluetooth bike
					updatedBikesCollection.Add(bikeInfo.Id, bikeInfo);
					continue;
				}

				// Check if to update current bike lock info using state from bluetooth service or not.
				var currentLockInfo = locksInfo.FirstOrDefault(x => x.Id == bluetoothBikeInfo.LockInfo.Id) // Update bike info with latest info from bluethooth service if available
					?? bluetoothBikeInfo.LockInfo; // Use lock info state object from copri which holds a lock id and a state of value unknown.

				updatedBikesCollection.Add(bluetoothBikeInfo.Id, new BikeInfoNS.BluetoothLock.BikeInfo(bluetoothBikeInfo, currentLockInfo));
			}

			return new BikeCollection(updatedBikesCollection);
		}
	}
}