using GerbilManager.Models;
using GerbilManager.Repositories;
using GerbilManager.Dtos;

using Microsoft.AspNetCore.Mvc;
using GerbilManager.Converter;

namespace GerbilManager.Controllers
{
    [ApiController]
    [Route("gerbils")]
    public class GerbilsController : ControllerBase
    {
        private readonly IGerbilRepository repository;
        private readonly IBreederRepository breederRepository;
        private readonly ILitterRepository litterRepository;

        public GerbilsController(IGerbilRepository repo)
        {
            this.repository = repo;
        }

        //GET /gerbils
        [HttpGet]
        public IEnumerable<GerbilDto> GetGerbils()
        {
            var items = repository.GetGerbils().Select( gerbil => gerbil.AsDto());
            return items;
        }

        //GET /gerbils
        [HttpGet("{id}")]
        public ActionResult<GerbilDto> GetGerbil(Guid id)
        {
            var item = repository.GetGerbil(id).AsDto();

            if(item is null)
            {
                return NotFound();
            }
            return item;
        }

        [HttpPost()]
        public ActionResult<GerbilDto> CreateGerbil(CreateGerbilDto dto)
        {
            Gerbil gerbil = new Gerbil{
                Id = Guid.NewGuid(),
                Name = dto.Name,
                Breeder = breederRepository.GetBreeder(dto.Breeder),
                Litter = litterRepository.GetLitter(dto.Litter),
                Gender = (Gender) (int) dto.Gender
            };

            this.repository.CreateGerbil(gerbil);

            return CreatedAtAction(nameof(GetGerbil), new { id = gerbil.Id}, gerbil.AsDto());
        }

        [HttpPut("{id}")]
        public ActionResult UpdateGerbil(Guid id, UpdateGerbilDto gerbilDto)
        {
            var existingItem = repository.GetGerbil(id);
            if(existingItem is null)
            {
                return NotFound();
            }

            Gerbil updatedGerbil = existingItem with{
                Breeder = breederRepository.GetBreeder(gerbilDto.Breeder.Id),
                Litter = litterRepository.GetLitter(gerbilDto.Litter.Id),
                Gender = (Gender) (int) gerbilDto.Gender,
                Name = gerbilDto.Name
            };

            repository.UpdateGerbil(updatedGerbil);
            return NoContent();
        }

        [HttpDelete("{id}")]
        public ActionResult DeleteItem(Guid id)
        {
            var existingGerbil = repository.GetGerbil(id);

            if(existingGerbil is null)
            {
                return NotFound();
            }

            repository.DeleteGerbil(existingGerbil);

            return NoContent();
        }
    }
}