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

namespace TravelAgencyBusinessLogic.BusinessLogics
{
    public class GuideLogic : IGuideLogic
    {
        private readonly ILogger _logger;

        private readonly IGuideStorage _guideStorage;

        public GuideLogic(ILogger<GuideLogic> logger, IGuideStorage guideStorage)
        {
            _logger = logger;
            _guideStorage = guideStorage;
        }

        public List<GuideViewModel>? ReadList(GuideSearchModel? model)
        {
            _logger.LogInformation("ReadList. GuideFIO: {GuideFIO}. Id: {Id} ", model?.GuideFIO, model?.Id);
            var list = (model == null) ? _guideStorage.GetFullList() : _guideStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
            return list;
        }

        public GuideViewModel? ReadElement(GuideSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Guide id: {Id}, Guide email: {Email}, Guide phone number: {PhoneNumber}", model?.Id, model?.Email, model?.PhoneNumber);
            var element = _guideStorage.GetElement(model!);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id: {Id}", element.Id);
            return element;
        }

        public bool Create(GuideBindingModel model)
        {
            CheckModel(model);
            if (_guideStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

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

        private void CheckModel(GuideBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.GuideFIO))
            {
                throw new ArgumentNullException("Нет ФИО гида", nameof(model.GuideFIO));
            }
            if (string.IsNullOrEmpty(model.Email))
            {
                throw new ArgumentNullException("Нет почты гида", nameof(model.Email));
            }
            if (string.IsNullOrEmpty(model.PhoneNumber))
            {
                throw new ArgumentNullException("Нет номера телефона гида", nameof(model.Email));
            }
            _logger.LogInformation("Guide. Id: {id}, FIO: {fio}, email: {email}", model.Id, model.GuideFIO, model.Email);
            var element = _guideStorage.GetElement(new GuideSearchModel
            {
                Email = model.Email,
                PhoneNumber = model.PhoneNumber,
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Гид с такой почтой или номером телефона уже есть");
            }
        }
    }
}