using EmployeeManager.Model.Data;
using System.Data.Common;
using System.Linq;

namespace EmployeeManager.Model
{
    public static class DataWorker
    {
        public static string CreatePhysicalPerson(string namePhysicalPersons, string surnamePhysicalPersons, string patronomicPhysicalPersons, DateTime birthday, string gender, string address, string telephone)
        {
            string result = "Возникла ошибка. Обратитесь в ЛАОД.";

            using(ApplicationConext db = new ApplicationConext())
            {
                bool checkIsExist = db.PhysicalPersons.Any(
                    e => e.NamePhysicalPersons == namePhysicalPersons 
                    && e.SurnamePhysicalPersons == surnamePhysicalPersons
                    && e.PatronomicPhysicalPersons == patronomicPhysicalPersons
                    && e.Birthday == birthday
                    );

                if (!checkIsExist)
                {
                    PhysicalPerson newPhysicalPerson = new PhysicalPerson
                    {
                        NamePhysicalPersons = namePhysicalPersons,
                        SurnamePhysicalPersons = surnamePhysicalPersons,
                        PatronomicPhysicalPersons = patronomicPhysicalPersons,
                        Birthday = birthday,
                        Gender = gender,
                        Address = address,
                        Telephone = telephone
                    };
                    db.PhysicalPersons.Add(newPhysicalPerson);
                    db.SaveChanges();
                    result = "Физическое лицо добавлено.";
                }
                return result;
            }
        }

        public static string CreateEmployee(string nameJob, DateTime startJob, DateTime? endJob, string? partTimeJob, float bid, PhysicalPerson? physicalPersons)
        {
            string result = "Возникла ошибка. Обратитесь в ЛАОД.";

            using (ApplicationConext db = new ApplicationConext())
            {

                Employee newEmployee = new Employee
                {
                    NameJob = nameJob,
                    StartJob = startJob,
                    EndJob = endJob,
                    PartTimeJob = partTimeJob,
                    Bid = bid,
                    PhysicalPersonsId = physicalPersons.Id
                    
                };
                db.Employees.Add(newEmployee);
                db.SaveChanges();
                result = "Работник добавлен.";

                return result;

            }
        }

        public static string DeletePhysicalPerson(PhysicalPerson physicalPerson)
        {
            string result = "Возникла ошибка. Обратитесь в ЛАОД.";

            using(ApplicationConext db = new ApplicationConext())
            {
                db.PhysicalPersons.Remove(physicalPerson);
                db.SaveChanges();
                result = "Физическое лицо удалено.";
            }

            return result;

        }

        public static string EditPhysicalPerson(PhysicalPerson oldPhysicalPerson, string newNamePhysicalPersons, string newSurnamePhysicalPersons, string newPatronomicPhysicalPersons, DateTime newBirthday, string newGender, string newAddress, string newTelephone)
        {
            string result = "Возникла ошибка. Обратитесь в ЛАОД.";

            using (ApplicationConext db = new ApplicationConext())
            {
                PhysicalPerson physicalPerson = db.PhysicalPersons.FirstOrDefault(e => e.Id == oldPhysicalPerson.Id);
                
                physicalPerson.SurnamePhysicalPersons = newSurnamePhysicalPersons;
                physicalPerson.NamePhysicalPersons = newNamePhysicalPersons;
                physicalPerson.PatronomicPhysicalPersons = newPatronomicPhysicalPersons;
                physicalPerson.Birthday = newBirthday;
                physicalPerson.Gender = newGender;
                physicalPerson.Address = newAddress;
                physicalPerson.Telephone = newTelephone;
            }

            return result;

        }

        public static List<PhysicalPerson> GetAllPhysicalPerson()
        {
            using (ApplicationConext db = new ApplicationConext())
            {
                var result = db.PhysicalPersons.ToList();
                return result;
            }
        }
    }
}