using AutoMapper;
using HanyadikHetVan.Data;
using HanyadikHetVan.Data.Entities;
using HanyadikHetVan.DTO;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace HanyadikHetVan.Services
{
    public class PurseService
    {
        private readonly ApplicationDbContext _dbContext;
        private readonly IMapper _mapper;

        public PurseService(ApplicationDbContext dbContext, IMapper mapper)
        {
            _dbContext = dbContext ?? throw new ArgumentNullException(nameof(dbContext));
            _mapper = mapper ?? throw new ArgumentNullException(nameof(mapper));
        }

        public async Task<PurseDTO> GetBalanceOfUser(String userId)
        {
            var purse = await _dbContext.Purses.Where(x => x.UserId == userId).FirstOrDefaultAsync();
            return _mapper.Map<Purse, PurseDTO>(purse);
        }

        public async Task<PurseDTO> SetBalanceOfUser(String userId, int newBalance)
        {
            var purse = new Purse() { UserId = userId, Balance = newBalance };
            _dbContext.Purses.Update(purse);
            await _dbContext.SaveChangesAsync();
            var newPurse = await _dbContext.Purses.Where(x => x.UserId == userId).FirstOrDefaultAsync();
            return _mapper.Map<Purse, PurseDTO>(newPurse);
        }
    }
}