using EmployeeManagmentContracts.BindingModels;
using EmployeeManagmentContracts.BusinessLogicContracts;
using EmployeeManagmentContracts.SearchModels;
using EmployeeManagmentContracts.StoragesContracts;
using EmployeeManagmentContracts.ViewModels;

namespace EmployeeManagmentBusinessLogic.BusinessLogic
{
    public class EmployeeLogic : IEmployeeLogic
    {
        private readonly IEmployeeStorage _employeeStorage;

        public EmployeeLogic(IEmployeeStorage employeeStorage)
        {
            _employeeStorage = employeeStorage;
        }

        public List<EmployeeViewModel> GetEmployees(EmployeeSearchModel model)
        {
            var employees = model == null ? _employeeStorage.GetFullList() : _employeeStorage.GetFilteredList(model);
            return employees.Select(e => new EmployeeViewModel
            {
                Id = e.Id,
                NameJob = e.NameJob,
                StartJob = e.StartJob,
                EndJob = e.EndJob,
                PartTimeJob = e.PartTimeJob,
                Bid = e.Bid,
                PhysicalPersonName = e.PhysicalPerson.Name
            }).ToList();
        }

        public EmployeeViewModel? GetEmployeeById(int id)
        {
            var employee = _employeeStorage.GetElement(id);
            return employee != null ? new EmployeeViewModel
            {
                Id = employee.Id,
                NameJob = employee.NameJob,
                StartJob = employee.StartJob,
                EndJob = employee.EndJob,
                PartTimeJob = employee.PartTimeJob,
                Bid = employee.Bid,
                PhysicalPersonName = employee.PhysicalPerson.Name
            } : null;
        }

        public void CreateOrUpdate(EmployeeBindingModel model)
        {
            if (model.Id.HasValue)
            {
                var existingEmployee = _employeeStorage.GetElement(model.Id.Value);
                if (existingEmployee == null)
                    throw new Exception("Сотрудник не найден");

                existingEmployee.NameJob = model.NameJob;
                existingEmployee.StartJob = model.StartJob;
                existingEmployee.EndJob = model.EndJob;
                existingEmployee.PartTimeJob = model.PartTimeJob;
                existingEmployee.Bid = model.Bid;
                existingEmployee.PhysicalPersonId = model.PhysicalPersonId;

                _employeeStorage.Update(existingEmployee);
            }
            else
            {
                var newEmployee = new Employee
                {
                    NameJob = model.NameJob,
                    StartJob = model.StartJob,
                    EndJob = model.EndJob,
                    PartTimeJob = model.PartTimeJob,
                    Bid = model.Bid,
                    PhysicalPersonId = model.PhysicalPersonId
                };
                _employeeStorage.Insert(newEmployee);
            }
        }

        public void Delete(int id)
        {
            var employee = _employeeStorage.GetElement(id);
            if (employee == null)
                throw new Exception("Сотрудник не найден");
            _employeeStorage.Delete(id);
        }
    }
}