using System.Collections.Generic;
using System.Linq;
using BlueWest.Data;
using Microsoft.EntityFrameworkCore;

namespace BlueWest.WebApi.EF
{
    internal static class CurrencyExtensions
    {
        
        internal static Currency GetCurrencyById(this DbSet<Currency> currencies, int currencyId) => currencies.GetOne(x => x.Id == currencyId);
        internal static (bool, T) NotFound<T>() where T : class => (false, null);

        
        internal static (bool, Currency) AddCurrency(this CountryDbContext dbContext, CurrencyCreate currencyToCreate)
        {
            
            var newCurrency = new Currency(currencyToCreate);
            return dbContext.Currencies.Add(dbContext, newCurrency);
        }
        
        
        internal static (bool, Currency) UpdateCurrency(this CountryDbContext dbContext, int currencyId, CurrencyUpdate currencyToUpdate)
        {
            var currency =  dbContext.Currencies.FirstOrDefault(x => x.Id == currencyId);
            
            if (currency == null) return NotFound<Currency>();
            
            var newCurrency = new Currency(currencyToUpdate);
            var operationResult = dbContext.Currencies.Update(dbContext, newCurrency);
            return operationResult;

        }
    }
}