using Lab4;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace StudentService
{
    public class StudentMethodService
    {
     private Student[] students = StudentFactory.Create();

     public List<Student> AgeBigger19()
     {
       IList<Student> studentsList = students;

       var teenAgerStudents = studentsList.Where(s => s.age > 19)
                              .ToList<Student>();


            return teenAgerStudents;
     }

    public List<Student> AgeBetween18and22()
    {
            IList<Student> studentsList = students;

            var teenAgerStudents = studentsList.Where(s => s.age > 18 && s.age < 22)
                                   .ToList<Student>();


            return teenAgerStudents;
    }

    public int CountNamesThatContainJ()
    {
            IList<Student> studentsList = students;

            var teenAgerStudents = studentsList.Count(s => s.StudentName.Contains("J");


            return teenAgerStudents;
    }

    public int CountNamesThatContainl()
    {
            IList<Student> studentsList = students;

            var teenAgerStudents = studentsList.Count(s => s.StudentName.Contains("l");


            return teenAgerStudents;
    }

    public List<Student> AgeBetween18and22()
     {
         IList<Student> studentsList = students;

            var teenAgerStudents = studentsList.Select(s => new { Name = s.StudentName, Age = s.age }).Where(s => s.Age == 17);

        return teenAgerStudents;
    }

    }

}