package service

import (
	"errors"
	"fmt"
)

func (s *StaffService) RegisterStaff(id int, name string, lastname string, phonenumber string) (Staff, error) {

	for _, staff := range s.Staffs {
		if staff.PhoneNumber == phonenumber {
			return Staff{}, errors.New("This number is already in use")
		}
	}

	newID := s.NextID
	s.NextID++

	newStaff := Staff{
		ID:          newID,
		Name:        name,
		LastName:    lastname,
		PhoneNumber: phonenumber,
	}
	s.Staffs = append(s.Staffs, newStaff)
	return newStaff, nil
}

func (s *StaffService) DeleteStaff(phoneNumber string) {
	for i, n := range s.Staffs {
		if phoneNumber == n.PhoneNumber {
			s.Staffs = append(s.Staffs[:i], s.Staffs[i+1:]...)
		}
	}
}

func (s *StaffService) ListStaff() []Staff {
	return s.Staffs
}

func (s *StaffService) PrintStaffs() {
	if len(s.Staffs) == 0 {
		fmt.Println("There is no staff yet")
	}
	for _, staff := range s.Staffs {
		fmt.Printf("ID: %d, Name:%s %s,Phone number:%s", staff.ID, staff.Name, staff.LastName, staff.PhoneNumber)
	}

}