using AutobusApi.Application.Common.Exceptions;
using AutobusApi.Application.Common.Interfaces;
using MediatR;

namespace AutobusApi.Application.Cities.Commands.UpdateCity;

public class UpdateCityCommandHandler : IRequestHandler<UpdateCityCommand>
{
    private readonly IApplicationDbContext _dbContext;

    public UpdateCityCommandHandler(IApplicationDbContext dbContext)
    {
        _dbContext = dbContext;
    }

    public async Task Handle(
        UpdateCityCommand request,
        CancellationToken cancellationToken)
    {
        var city = await _dbContext.Cities
            .FindAsync(new object[] { request.Id }, cancellationToken);

        if (city == null)
        {
            throw new NotFoundException();
        }

        city.Name = request.Name;
        city.RegionId = request.RegionId;

        await _dbContext.SaveChangesAsync(cancellationToken);
    }
}