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

namespace AutobusApi.Application.VehicleEnrollments.Commands.UpdateVehicleEnrollment;

public class UpdateVehicleEnrollmentCommandHandler : IRequestHandler<UpdateVehicleEnrollmentCommand>
{
    private readonly IApplicationDbContext _dbContext;

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

    public async Task Handle(
        UpdateVehicleEnrollmentCommand request,
        CancellationToken cancellationToken)
    {
        var vehicleEnrollment = await _dbContext.VehicleEnrollments
            .Include(ve => ve.RouteAddressDetails)
            .FirstAsync(ve => ve.Id == request.Id, cancellationToken);

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

        vehicleEnrollment.DepartureDateTimeUtc = request.DepartureDateTimeUtc;

        foreach (var requestDetail in request.RouteAddressDetails)
        {
            var detail = vehicleEnrollment.RouteAddressDetails
                .First(rad => rad.RouteAddressId == requestDetail.RouteAddressId);

            detail.TimeToNextAddress = requestDetail.TimeToNextAddress;
            detail.CurrentAddressStopTime = requestDetail.CurrentAddressStopTime;
            detail.CostToNextAddress = requestDetail.CostToNextAddress;
        }

        await _dbContext.SaveChangesAsync(cancellationToken);
    }
}