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

namespace CandidateReviewBusinessLogic.BusinessLogic
{
    public class AssessmentLogic : IAssessmentLogic
    {
        private readonly ILogger _logger;
        private readonly IAssessmentStorage _assessmentStorage;
        public AssessmentLogic(ILogger<AssessmentLogic> logger, IAssessmentStorage assessmentStorage)
        {
            _logger = logger;
            _assessmentStorage = assessmentStorage;
        }
        public bool Create(AssessmentBindingModel model)
        {
            CheckModel(model);
            if (_assessmentStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

        public AssessmentViewModel? ReadElement(AssessmentSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            var element = _assessmentStorage.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<AssessmentViewModel>? ReadList(AssessmentSearchModel? model)
        {
            var list = model == null ? _assessmentStorage.GetFullList() : _assessmentStorage.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(AssessmentBindingModel model)
        {
            CheckModel(model);
            if (_assessmentStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

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

            if (!withParams)
            {
                return;
            }

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

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

            var element = _assessmentStorage.GetElement(new AssessmentSearchModel
            {
                ResumeId = model.ResumeId,
                UserId = model.UserId
            });

            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Резюме уже было оценено");
            }
        }
    }
}