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

namespace AutobusApi.Application.TicketGroups.Queries.GetTicketGroup;

public class GetTicketGroupQueryHandler : IRequestHandler<GetTicketGroupQuery, TicketGroupDto>
{
    private readonly IApplicationDbContext _dbContext;
    private readonly IMapper _mapper;

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

    public async Task<TicketGroupDto> Handle(
        GetTicketGroupQuery request,
        CancellationToken cancellationToken)
    {
        var ticketGroup = await _dbContext.TicketGroups
            .SingleOrDefaultAsync(c => c.Id == request.Id);

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

        return _mapper.Map<TicketGroupDto>(ticketGroup);
    }
}