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

namespace AutobusApi.Application.Companies.Queries.GetCompany;

public class GetCompanyQueryHandler : IRequestHandler<GetCompanyQuery, CompanyDto>
{
    private readonly IApplicationDbContext _dbContext;
    private readonly IMapper _mapper;

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

    public async Task<CompanyDto> Handle(
        GetCompanyQuery request,
        CancellationToken cancellationToken)
    {
        var company = await _dbContext.Companies
            .ProjectTo<CompanyDto>(_mapper.ConfigurationProvider)
            .SingleOrDefaultAsync(c => c.Id == request.Id);

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

        return company;
    }
}