using CleanArchitecture.Application.Common.Exceptions;
using CleanArchitecture.Application.Common.Interfaces;
using CleanArchitecture.Domain.Entities;
using MediatR;
using System.Threading;
using System.Threading.Tasks;
using CleanArchitecture.WebUI.Controllers;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;

namespace CleanArchitecture.Application.TodoItems.Commands.DeleteTodoItem
{
    [Authorize]
    public class DeleteTodoItemController : ApiControllerBase
    {
        [HttpDelete("/todoItems/{id}")]
        public async Task<ActionResult> Delete(int id)
        {
            await Mediator.Send(new DeleteTodoItemCommand { Id = id });

            return NoContent();
        }
    }

    public class DeleteTodoItemCommand : IRequest
    {
        public int Id { get; set; }
    }

    public class DeleteTodoItemCommandHandler : IRequestHandler<DeleteTodoItemCommand>
    {
        private readonly IApplicationDbContext _context;

        public DeleteTodoItemCommandHandler(IApplicationDbContext context)
        {
            _context = context;
        }

        public async Task<Unit> Handle(DeleteTodoItemCommand request, CancellationToken cancellationToken)
        {
            var entity = await _context.TodoItems.FindAsync(request.Id);

            if (entity == null)
            {
                throw new NotFoundException(nameof(TodoItem), request.Id);
            }

            _context.TodoItems.Remove(entity);

            await _context.SaveChangesAsync(cancellationToken);

            return Unit.Value;
        }
    }
}