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

namespace AutobusApi.Application.Employees.Commands.DeleteEmployee;

public class DeleteEmployeeCommandHandler : IRequestHandler<DeleteEmployeeCommand>
{
    private readonly IApplicationDbContext _dbContext;

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

    public async Task Handle(
        DeleteEmployeeCommand request,
        CancellationToken cancellationToken)
    {
        var employee = await _dbContext.Employees
            .SingleOrDefaultAsync(c => c.Id == request.Id, cancellationToken);

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

        _dbContext.Employees.Remove(employee);

        await _dbContext.SaveChangesAsync(cancellationToken);
    }
}