using MediatR;
using Microsoft.EntityFrameworkCore;
using Mirea.Api.DataAccess.Application.Common.Exceptions;
using Mirea.Api.DataAccess.Application.Interfaces.DbContexts.Schedule;
using System.Threading;
using System.Threading.Tasks;

namespace Mirea.Api.DataAccess.Application.Cqrs.Group.Commands.UpdateGroup;

public class UpdateGroupCommandHandler(IGroupDbContext dbContext) : IRequestHandler<UpdateGroupCommand>
{
    public async Task Handle(UpdateGroupCommand request, CancellationToken cancellationToken)
    {
        var entity = await dbContext.Groups.FirstOrDefaultAsync(g => g.Id == request.Id, cancellationToken: cancellationToken) ?? throw new NotFoundException(typeof(Domain.Schedule.Group), nameof(Domain.Schedule.Group.Id), request.Id);

        entity.FacultyId = request.FacultyId;

        await dbContext.SaveChangesAsync(cancellationToken);
    }
}