using GerbilManagerWebAPI.Models;
using GerbilManagerWebAPI.Repositories;
using GerbilManagerWebAPI.Dtos;

using GerbilManagerWebAPI.Converter;

using Microsoft.AspNetCore.Mvc;
using System.Xml;

namespace GerbilManagerWebAPI.Controllers
{
    [ApiController]
    [Route("litters")]
    public class LittersController : ControllerBase
    {
        private readonly IGerbilRepository gerbilrepository;
        private readonly IBreederRepository breederRepository;
        private readonly ILitterRepository repository;

        public LittersController(ILitterRepository repo)
        {
            this.repository = repo;
        }

        //GET /gerbils
        [HttpGet]
        public IEnumerable<LitterDto> GetLitters()
        {
            var items = repository.GetLitters().Select( litter => litter.AsDto());
            return items;
        }

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

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

        [HttpPost()]
        public ActionResult<LitterDto> CreateLitter(CreateLitterDto dto)
        {
            Litter litter = new Litter{
                Id = Guid.NewGuid(),
                Date = dto.Date,
                Father = gerbilrepository.GetGerbil(dto.Father ?? Guid.Empty),
                Mother = gerbilrepository.GetGerbil(dto.Mother ?? Guid.Empty),
                Name = dto.Name,
                Strength = dto.Strength
            };

            this.repository.CreateLitter(litter);

            return CreatedAtAction(nameof(GetLitter), new { id = litter.Id}, litter.AsDto());
        }

        [HttpPut("{id}")]
        public ActionResult UpdateLitter(Guid id, UpdateLitterDto litterDto)
        {
            var existingItem = repository.GetLitter(id);
            if(existingItem is null)
            {
                return NotFound();
            }

            Litter updatedLitter = existingItem with{
                Date = litterDto.Date ?? DateTime.Now,
                Strength = litterDto.Strength,
                Father = gerbilrepository.GetGerbil(litterDto.Father ?? Guid.Empty),
                Mother = gerbilrepository.GetGerbil(litterDto.Mother ?? Guid.Empty),
                Name = litterDto.Name
            };

            repository.UpdateLitter(updatedLitter);
            return NoContent();
        }

        [HttpDelete("{id}")]
        public ActionResult DeleteLitter(Guid id)
        {
            var existingLitter = repository.GetLitter(id);

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

            repository.DeleteLitter(existingLitter);

            return NoContent();
        }
    }
}