using CandidateReviewContracts.BindingModels;
using CandidateReviewContracts.BusinessLogicsContracts;
using CandidateReviewContracts.SearchModels;
using CandidateReviewContracts.StoragesContracts;
using CandidateReviewContracts.ViewModels;
using Microsoft.Extensions.Logging;

namespace CandidateReviewBusinessLogic.BusinessLogic
{
    public class ResumeLogic : IResumeLogic
    {
        private readonly ILogger _logger;
        private readonly IResumeStorage _resumeStorage;
        public ResumeLogic(ILogger<ResumeLogic> logger, IResumeStorage resumeStorage)
        {
            _logger = logger;
            _resumeStorage = resumeStorage;
        }
        public bool Create(ResumeBindingModel model)
        {
            CheckModel(model);
            if (_resumeStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(ResumeBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id: {Id}", model.Id);
            if (_resumeStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        public ResumeViewModel? ReadElement(ResumeSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            var element = _resumeStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id: {Id}", element.Id);
            return element;
        }

        public List<ResumeViewModel>? ReadList(ResumeSearchModel? model)
        {
            var list = model == null ? _resumeStorage.GetFullList() : _resumeStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
            return list;
        }

        public bool Update(ResumeBindingModel model)
        {
            CheckModel(model);
            if (_resumeStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(ResumeBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            if (!withParams)
            {
                return;
            }

            if (model.VacancyId <= 0)
            {
                throw new ArgumentException("Нет идентификатора вакансии", nameof(model.VacancyId));
            }

            if (model.UserId <= 0)
            {
                throw new ArgumentException("Нет идентификатора пользователя", nameof(model.UserId));
            }

            if (string.IsNullOrEmpty(model.Title))
            {
                throw new ArgumentNullException("Нет названия резюме", nameof(model.Title));
            }

            if (string.IsNullOrEmpty(model.Experience))
            {
                throw new ArgumentNullException("Нет опыта работы в резюме", nameof(model.Experience));
            }

            if (string.IsNullOrEmpty(model.Education))
            {
                throw new ArgumentNullException("Нет образования в резюме", nameof(model.Education));
            }

            if (string.IsNullOrEmpty(model.Skills))
            {
                throw new ArgumentNullException("Нет навыков в резюме", nameof(model.Skills));
            }

            if (string.IsNullOrEmpty(model.Status.ToString()))
            {
                throw new ArgumentNullException("Нет статуса резюме", nameof(model.Status));
            }

            var element = _resumeStorage.GetElement(new ResumeSearchModel
            {
                VacancyId = model.VacancyId,
                UserId = model.UserId,
                Title = model.Title
            });

            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Такое резюме уже существует");
            }
        }
    }
}