using AutobusApi.Application.Common.Exceptions;
using AutobusApi.Application.Common.Interfaces;
using AutoMapper;
using MediatR;
using Microsoft.EntityFrameworkCore;

namespace AutobusApi.Application.VehicleEnrollments.Queries.GetVehicleEnrollment;

public class GetVehicleEnrollmentQueryHandler : IRequestHandler<GetVehicleEnrollmentQuery, VehicleEnrollmentDto>
{
    private readonly IApplicationDbContext _dbContext;
    private readonly IMapper _mapper;

    public GetVehicleEnrollmentQueryHandler(
        IApplicationDbContext dbContext,
        IMapper mapper)
    {
        _dbContext = dbContext;
        _mapper = mapper;
    }

    public async Task<VehicleEnrollmentDto> Handle(
        GetVehicleEnrollmentQuery request,
        CancellationToken cancellationToken)
    {
        var vehicleEnrollment = await _dbContext.VehicleEnrollments
            .SingleOrDefaultAsync(c => c.Id == request.Id);

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

        return _mapper.Map<VehicleEnrollmentDto>(vehicleEnrollment);
    }
}