using System;
using System.Collections.Generic;
using FluentValidation;
using Lidarr.Http;
using Lidarr.Http.REST;
using Lidarr.Http.Validation;
using Nancy;
using NzbDrone.Core.Profiles.Delay;

namespace Lidarr.Api.V1.Profiles.Delay
{
    public class DelayProfileModule : LidarrRestModule<DelayProfileResource>
    {
        private readonly IDelayProfileService _delayProfileService;

        public DelayProfileModule(IDelayProfileService delayProfileService, DelayProfileTagInUseValidator tagInUseValidator)
        {
            _delayProfileService = delayProfileService;

            GetResourceAll = GetAll;
            GetResourceById = GetById;
            UpdateResource = Update;
            CreateResource = Create;
            DeleteResource = DeleteProfile;
            Put(@"/reorder/(?<id>[\d]{1,10})", options => Reorder(options.Id));

            SharedValidator.RuleFor(d => d.Tags).NotEmpty().When(d => d.Id != 1);
            SharedValidator.RuleFor(d => d.Tags).EmptyCollection<DelayProfileResource, int>().When(d => d.Id == 1);
            SharedValidator.RuleFor(d => d.Tags).SetValidator(tagInUseValidator);
            SharedValidator.RuleFor(d => d.UsenetDelay).GreaterThanOrEqualTo(0);
            SharedValidator.RuleFor(d => d.TorrentDelay).GreaterThanOrEqualTo(0);

            SharedValidator.RuleFor(d => d).Custom((delayProfile, context) =>
            {
                if (!delayProfile.EnableUsenet && !delayProfile.EnableTorrent)
                {
                    context.AddFailure("Either Usenet or Torrent should be enabled");
                }
            });
        }

        private int Create(DelayProfileResource resource)
        {
            var model = resource.ToModel();
            model = _delayProfileService.Add(model);

            return model.Id;
        }

        private void DeleteProfile(int id)
        {
            if (id == 1)
            {
                throw new MethodNotAllowedException("Cannot delete global delay profile");
            }

            _delayProfileService.Delete(id);
        }

        private void Update(DelayProfileResource resource)
        {
            var model = resource.ToModel();
            _delayProfileService.Update(model);
        }

        private DelayProfileResource GetById(int id)
        {
            return _delayProfileService.Get(id).ToResource();
        }

        private List<DelayProfileResource> GetAll()
        {
            return _delayProfileService.All().ToResource();
        }

        private object Reorder(int id)
        {
            ValidateId(id);

            var afterIdQuery = Request.Query.After;
            int? afterId = afterIdQuery.HasValue ? Convert.ToInt32(afterIdQuery.Value) : null;

            return _delayProfileService.Reorder(id, afterId).ToResource();
        }
    }
}
