const studentsArr = [{
    name: 'Сергей',
    surname: 'Войлов',
    ratingPoint: 1000,
    schoolPoint: 1000,
    course: 2,
},
{
    name: 'Татьяна',
    surname: 'Коваленко',
    ratingPoint: 880,
    schoolPoint: 700,
    course: 1,
},
{
    name: 'Анна',
    surname: 'Кугир',
    ratingPoint: 1430,
    schoolPoint: 1200,
    course: 3,
},
{
    name: 'Станислав',
    surname: 'Щелоков',
    ratingPoint: 1130,
    schoolPoint: 1060,
    course: 2,
},
{
    name: 'Денис',
    surname: 'Хрущ',
    ratingPoint: 1000,
    schoolPoint: 990,
    course: 4,
},
{
    name: 'Татьяна',
    surname: 'Капустник',
    ratingPoint: 650,
    schoolPoint: 500,
    course: 3,
},
{
    name: 'Максим',
    surname: 'Меженский',
    ratingPoint: 990,
    schoolPoint: 1100,
    course: 1,
},
{
    name: 'Денис',
    surname: 'Марченко',
    ratingPoint: 570,
    schoolPoint: 1300,
    course: 4,
},
{
    name: 'Антон',
    surname: 'Завадский',
    ratingPoint: 1090,
    schoolPoint: 1010,
    course: 3
},
{
    name: 'Игорь',
    surname: 'Куштым',
    ratingPoint: 870,
    schoolPoint: 790,
    course: 1,
},
{
    name: 'Инна',
    surname: 'Скакунова',
    ratingPoint: 1560,
    schoolPoint: 200,
    course: 2,
},
];


const budgetLimit = 5;
const allowRating = 800;
let id = 1;

class CreateStudent {
    constructor(student) {
        CreateStudent.id.call(this)
        
        this.name = student.name;
        this.surname = student.surname;
        this.ratingPoint = student.ratingPoint;
        this.schoolPoint = student.schoolPoint;
        this.isSelfPayment = (student.ratingPoint >= allowRating ) ? student.isSelfPayment = false : student.isSelfPayment = true;
        this.course = student.course;
    }
static id = function() { return this.id = id++;};
getTypeOfStudy() {if(this.isSelfPayment === false) {
    return `бюджет`
        }
        return `контракт`
    }
getFullInfo() {return `Я - ${this.name} ${this.surname}, рейтинговый балл - ${this.ratingPoint}, форма обучения - ${this.getTypeOfStudy()}`};
getRankedPlace() {
    const index = fullListStudents.findIndex((stud) => stud.id == this.id)
    return index + 1;
}
     
}; 

 
let contract = [];

const setAllCreatedStudentsByConstructor = arrOfStudents => {
   arrOfStudents = studentsArr.map((student) => new CreateStudent(student));
    arrOfStudents.sort(function(currentStudent, nextStudent) {return nextStudent.ratingPoint - currentStudent.ratingPoint || nextStudent.schoolPoint - currentStudent.schoolPoint});
    arrOfStudents.map(function(student, index) {
        if(index >= budgetLimit) {
            student.isSelfPayment = true;
            if (student.isSelfPayment === true) {
                contract.push(student)
            }
        }
    })
 budget = arrOfStudents.filter(student => student.isSelfPayment === false) 
  fullListStudents = [...budget,...contract].sort(function(currentStudent, nextStudent) {return nextStudent.ratingPoint - currentStudent.ratingPoint || nextStudent.schoolPoint - currentStudent.schoolPoint});
}

setAllCreatedStudentsByConstructor(studentsArr)
console.log(budget)   
console.log(contract)
console.log(fullListStudents)
console.log(contract[3].getFullInfo())
console.log(fullListStudents[2].getRankedPlace())
  
class Intern extends CreateStudent {

    constructor(companyName) {
        super(companyName);
        this.companyName = companyName = 'Google';
    }
    getFullInternInfo() {return `Я - ${this.name} ${this.surname}, рейтинговый балл - ${this.ratingPoint}, форма обучения - ${this.getTypeOfStudy()}, интерн в компании ${this.companyName}`};
}

interns = fullListStudents.map((companyName) => new Intern(companyName, 'Google'))
    
console.log(interns[3].getFullInternInfo())