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

namespace AutobusApi.Application.Regions.Commands.UpdateRegion;

public class UpdateRegionCommandHandler : IRequestHandler<UpdateRegionCommand>
{
    private readonly IApplicationDbContext _dbContext;

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

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

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

        region.Name = request.Name;
        region.CountryId = request.CountryId;

        await _dbContext.SaveChangesAsync(cancellationToken);
    }
}