using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyClasses.PersonClasses
{
    public class PersonManager
    {
        public Person CreatePerson(string first,
                                   string last,
                                   bool isSupervisor)
        {
            Person ret = null;
            if (!string.IsNullOrEmpty(first))
            {
                if (isSupervisor)
                {
                    ret = new Supervisor();
                }
                else
                {
                    ret = new Employee();
                }

                // Assign variables
                ret.FirstName = first;
                ret.LastName = last;
            }
            return ret;
        }

        /// <summary>
        /// This method simulates retrieving a list of Person object
        /// </summary>
        /// <returns>A collection of Person objets</returns>
       public List<Person> GetPeople()
        {
            List<Person> people = new List<Person>();

            people.Add(new Person() { FirstName = "Paul", LastName = "Sheriff" });
            people.Add(new Person() { FirstName = "John", LastName = "Kuhn" });
            people.Add(new Person() { FirstName = "Jim", LastName = "Rulh" });

            return people;
        }

        /// <summary>
        /// This method simulate retieving a list of Supervisor object
        /// </summary>
        /// <returns>A collection of Supervisor objects</returns>
        public List<Person> GetSupervisors()
        {
            List<Person> people = new List<Person>();

            people.Add(CreatePerson("Paul", "Sheriff", true));
            people.Add(CreatePerson("Michael", "Krasowski", true));

            return people;
        }

        /// <summary>
        /// This method simulates retrieving a list of Employee object
        /// </summary>
        /// <returns>A collection of Persons objects</returns>
        public List<Person> GetEmployees()
        {
            List<Person> people = new List<Person>();

            people.Add(CreatePerson("Steve", "Nystrom", false));
            people.Add(CreatePerson("John", "Kuhn", false));
            people.Add(CreatePerson("Jim", "Rulh", false));

            return people;
        }

        /// <summary>
        /// This method simulates retrieving a list of Supervisor and Employee object
        /// </summary>
        /// <returns>A collection of Supervisor and Employee objects</returns>
        public List<Person> GetSupervisorAndEmployees()
        {
            List<Person> people = new List<Person>();

            people.AddRange(GetEmployees());
            people.AddRange(GetSupervisors());

            return people;
        }
    }
}