using LawFimDataModels.Enums;
using LawFimDataModels.Models;
using LawFirmContracts.BindingModels;
using LawFirmContracts.BusinessLogicContracts;
using LawFirmContracts.SearchModels;
using LawFirmContracts.StoragesContracts;
using LawFirmContracts.ViewModels;
using Microsoft.Extensions.Logging;

namespace LawFirmBusinessLogic.BusinessLogics
{
    public class CaseLogic : ICaseLogic
    {
        private readonly ILogger _logger;
        private readonly ICaseStorage _caseStorage;

        public CaseLogic(ILogger<CaseLogic> logger, ICaseStorage CaseStorage)
        {
            _logger = logger;
            _caseStorage = CaseStorage;
        }

        public bool CaseAnalysis(CaseBindingModel model)
        {
            return UpdateStatus(model, CaseStatus.АнализДелаИПодготовкаДокументов);
        }

        public bool CaseHearing(CaseBindingModel model)
        {
            return UpdateStatus(model, CaseStatus.СлушанияДела);
        }

        public bool CloseCase(CaseBindingModel model)
        {
            return UpdateStatus(model, CaseStatus.ЗакрытиеДела);
        }

        public bool CreateCase(CaseBindingModel model)
        {
            CheckModel(model);

            if (model.Status != CaseStatus.Неизвестен)
            {
                _logger.LogWarning("Case status is incorrect");
                return false;
            }

            model.Status = CaseStatus.Принято;
            model.DateCreate = DateTime.Now;

            if (_caseStorage.Insert(model) == null)
            {
                model.Status = CaseStatus.Неизвестен;
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool DeleteCase(CaseBindingModel model)
        {
            if (_caseStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        public CaseViewModel? ReadElement(CaseSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Name:{Name}. Id:{Id}", model.Name, model.Id);
            var element = _caseStorage.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 Update(CaseBindingModel model)
        {
            CheckModel(model);
            if (_caseStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        public List<CaseViewModel>? ReadList(CaseSearchModel? model)
        {
            _logger.LogInformation("ReadList. CaseId:{Id}", model?.Id);
            var list = model == null ? _caseStorage.GetFullList() : _caseStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public bool AddClientToCase(CaseSearchModel model, IClientModel client)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            _logger.LogInformation(" CaseName:{CaseName}.Id:{Id}", model.Name, model.Id);
            var element = _caseStorage.GetElement(model);

            if (element == null)
            {

                return false;
            }
            if (element.CaseClients.ContainsKey(client.Id))
            {
                return false;
            }
            element.CaseClients[client.Id] = client;

            _caseStorage.Update(new()
            {
                Id = element.Id,
                Name = element.Name,
                DateCreate = element.DateCreate,
                Status = element.Status,
                CaseClients = element.CaseClients,
                ExecutorId = element.ExecutorId,
            });

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

            if (!withParams)
            {
                return;
            }

            if (string.IsNullOrEmpty(model.Name))
            {
                throw new ArgumentNullException("Нет описания дела", nameof(model.Name));

            }

            _logger.LogInformation("Case. CaseID:{Id}, Name:{Name}.", model.Id, model.Name);
        }
        private bool UpdateStatus(CaseBindingModel model, CaseStatus newStatus)
        {
            CheckModel(model);
            if (model.Status + 1 != newStatus)
            {

                _logger.LogWarning("Status incorrected");
                return false;

            }
            model.Status = newStatus;
            if (model.Status == CaseStatus.ЗакрытиеДела)
            {
                model.DateImplement = DateTime.Now;
            }
            if (_caseStorage.Update(model) == null)
            {
                model.Status--;
                _logger.LogWarning("Update operation failed");

                return false;
            }

            return true;
        }

    }
}