using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using gehGassi.Core.Interfaces;
using gehGassi.Domain.Common;
using gehGassi.Domain.Payment;

namespace gehGassi.Core.Services
{
	/// <summary>
	/// Service der die Verwaltung von Wallets ermöglicht
	/// </summary>
	public class WalletService : ServiceBase<Wallet>, IWalletService
	{
		/// <summary>
		/// Erstellt eine Instanz
		/// </summary>
		/// <param name="unitOfWork">Instanz eines IUnitOfWork</param>
		public WalletService(IUnitOfWork unitOfWork) : base(unitOfWork)
		{
			
		}

		/// <summary>
		/// Erstellen eines Wallets für einen AppUser
		/// </summary>
		/// <param name="appUserId">Id des AppUsers</param>
		/// <param name="walletId">ID des Walltes bei Mangopay</param>
		/// <param name="type">Typ des Wallets</param>
		/// <param name="ownerId">Id des Payment Owners (PaymentId)</param>
		/// <param name="currency">Währung ISO 4217 Code</param>
		/// <param name="description">Beschreibung</param>
		/// <returns>Wallet</returns>
		public Wallet Create(string appUserId, string walletId, WalletType type, string ownerId, string currency, string description)
		{
			var wallet = new Wallet
			{
				Id = Guid.NewGuid().ToString("N"),
				AppUserId = appUserId,
				Type = type,
				OwnerId = ownerId,
				WalletId = walletId,
				Currency = currency,
				Description = description,
				Balance = 0,
				UpdatedAt = DateTimeOffset.UtcNow
			};
			return wallet;
		}

		/// <summary>
		/// Gibt ein Wallet für einen AppUser mit einem Typ zurück
		/// </summary>
		/// <param name="appUserId">Id des AppUsers</param>
		/// <param name="type">Typ des Wallets</param>
		/// <returns>Wallet oder null, wenn nicht gefunden</returns>
		public async Task<Wallet> GetAsync(string appUserId, WalletType type)
		{
			var wallet = await Repository.FirstOrDefaultAsync(c => c.AppUserId == appUserId && c.Type == type).ConfigureAwait(false);
			return wallet;
		}

		/// <summary>
		/// Gibt eine Liste aller Wallets eines AppUsers zurück
		/// </summary>
		/// <param name="appUserId">Id des AppUsers</param>
		/// <returns>Liste von Wallets</returns>
		public async Task<List<Wallet>> GetAllAsync(string appUserId)
		{
			return (await Repository.FindAsync(c => c.AppUserId == appUserId).ConfigureAwait(false)).ToList();
		}
	}
}