using Microsoft.Extensions.Logging;
using SchoolAgainStudyBusinessLogic.Новая_папка;
using SchoolAgainStudyContracts.BindingModel;
using SchoolAgainStudyContracts.BusinessLogicContracts;
using SchoolAgainStudyContracts.SearchModel;
using SchoolAgainStudyContracts.StorageContracts;
using SchoolAgainStudyContracts.ViewModel;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SchoolAgainStudyBusinessLogic.BusinessLogic
{
    public class TeacherLogic : ITeacherLogic
    {
        private readonly ILogger _logger;
        private readonly ITeacherStorage _teacherStorage;
        public TeacherLogic(ILogger<TeacherLogic> logger, ITeacherStorage teacherStorage)
        {
            _logger = logger;
            _teacherStorage = teacherStorage;
        }
        public List<TeacherViewModel>? ReadList(TeacherSearchModel? model)
        {
            _logger.LogInformation("ReadList. Login:{Login}.Id:{ Id}", model?.Login, model?.Id);
            var list = model == null ? _teacherStorage.GetFullList() : _teacherStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public TeacherViewModel? ReadElement(TeacherSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Login:{Login}. Id:{ Id}", model.Login, model.Id);
            var element = _teacherStorage.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(TeacherBindingModel model)
        {
            CheckModel(model);
            if (_teacherStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Update(TeacherBindingModel model)
        {
            CheckModel(model);
            if (_teacherStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(TeacherBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_teacherStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(TeacherBindingModel model, bool withParams =
       true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Login))
            {
                throw new ArgumentNullException("Не задан логин", nameof(model.Login));
            }
            if (string.IsNullOrEmpty(model.Password))
            {
                throw new ArgumentNullException("Не задан пароль", nameof(model.Password));
            }
            if (string.IsNullOrEmpty(model.Post))
            {
                throw new ArgumentNullException("Не задана должность", nameof(model.Post));
            }
            if (string.IsNullOrEmpty(model.Email))
            {
                throw new ArgumentNullException("Не задана почта", nameof(model.Email));
            }
            if (string.IsNullOrEmpty(model.Name))
            {
                throw new ArgumentNullException("Не задано ФИО", nameof(model.Name));
            }
            _logger.LogInformation("Teacher. Name:{Name}.Email:{ Email}. Post{Post}.Login{Login} .Password{Password} Id: {Id}", model.Name, model.Email, model.Post, model.Login, model.Password, model.Id);
            var element = _teacherStorage.GetElement(new TeacherSearchModel
            {
                Login = model.Login
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Учитель с таким логином уже есть");
            }
        }
    }
}