using AsbCloudApp.Data;
using AsbCloudApp.Services;
using AsbCloudDb.Model;
using Mapster;
using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsbCloudInfrastructure.Services
{
    public class WellCompositeService : IWellCompositeService
    {
        private readonly IAsbCloudDbContext context;

        public WellCompositeService(IAsbCloudDbContext context)
        {
            this.context = context;
        }

        public async Task<IEnumerable<WellCompositeDto>> GetAsync(int idWell, CancellationToken token)
        {
            var entities = await context.WellComposites
                .Where(c => c.IdWell == idWell)
                .AsNoTracking()
                .ToListAsync(token)
                .ConfigureAwait(false);
            return entities.Select(Convert);
        }

        public Task<int> SaveAsync(int idWell, IEnumerable<WellCompositeDto> wellComposites, CancellationToken token)
        {
            context.WellComposites.RemoveRange(context.WellComposites
                .Where(c => c.IdWell == idWell));

            var entities = wellComposites
                .Select(w => Convert(idWell, w));

            context.WellComposites.AddRange(entities);
            return context.SaveChangesAsync(token);
        }

        private WellComposite Convert(int idWell, WellCompositeDto dto)
        {
            var entity = dto.Adapt<WellComposite>();
            entity.IdWell = idWell;
            return entity;
        }
        private WellCompositeDto Convert(WellComposite entity)
        {
            var dto = entity.Adapt<WellCompositeDto>();
            return dto;
        }
    }
}