SeksZdziecmi

package altkom.sessionbeans;

import altkom.domain.*;
import altkom.PhoneType;
import altkom.domain.CustomerId;
import altkom.domain.*;
import com.sun.xml.internal.ws.api.message.ExceptionHasMessage;
import db.*;

import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.ejb.Singleton;
import javax.ejb.Startup;
import javax.ejb.Stateless;
import javax.persistence.*;
import java.math.BigDecimal;
import java.util.*;

/**
 * Created by user on 19.07.17.
 */

@Singleton
@Startup
public class StartUpBean {
    @PersistenceContext(unitName = "Customers")
    EntityManager entityManager;

    Random random = new Random();
    ArrayList<Student> students = new ArrayList<Student>();
    ArrayList<Teacher> teachers = new ArrayList<Teacher>();
    ArrayList<Gpa> gpas = new ArrayList<Gpa>();
    ArrayList<Course> courses = new ArrayList<Course>();

    @PostConstruct
    public void init() {

        generatTeacherList(5);
        generateStudentsList(10);


    }

    private Set<Teacher> generatTeacherList(int size) {
        Set<Teacher> teachersList = new HashSet<Teacher>();

        for (int i = 0; i < size; i++) {
            Teacher teacher = generateTeacher(random.nextInt(5));

            teachersList.add(teacher);
            entityManager.persist(teacher);
        }
        return teachersList;
    }

    private Teacher generateTeacher(int courses) {
        Teacher teacher = new Teacher();
        teacher.setCourses(generateCourseListForTeacher(5, teacher));
        teacher.setPersonalInfo(generatePersonalInfo());
        teachers.add(teacher);
        return teacher;
    }

    private Student generateStudent() {
        Student student = new Student();
        student.setBookNumber(random.nextInt(1000000));
        student.setPersonalInfo(generatePersonalInfo());
        student.setGpas(generateGpas(random.nextInt(10)));
        student.setCourses(generateCourseListForStudent(random.nextInt(5), student));
        return student;

    }

    private ArrayList<Student> generateStudentsList(int size) {
        ArrayList<Student> studentsList = new ArrayList<Student>();
        for (int i = 0; i < size; i++) {
            Student student = generateStudent();
            studentsList.add(student);
            students.add(student);
            entityManager.persist(student);
        }
        return studentsList;
    }

    private PersonalInfo generatePersonalInfo() {
        PersonalInfo personalInfo = new PersonalInfo();
        Date bDate = new Date();
        bDate.setYear((random.nextInt(50) + 1950));
        personalInfo.setBirthDate(bDate);
        personalInfo.setFirstName("Imie" + System.currentTimeMillis());
        personalInfo.setLastName("Nazwisko" + System.nanoTime());
        personalInfo.setMan(random.nextBoolean());
        return personalInfo;
    }

    private Set<Gpa> generateGpas(int pcs) {
        Set<Gpa> gpaList = new HashSet<Gpa>();
        for (int i = 0; i < Math.abs(pcs); i++) {
            Gpa gpa = new Gpa();
            BigDecimal avg = new BigDecimal(random.nextDouble() * 3 + 2);
            gpa.setGpaValue(avg);
            gpa.setYear(random.nextInt(5) + 1);
            gpaList.add(gpa);
            gpas.add(gpa);
            entityManager.persist(gpa);
        }
        return gpaList;
    }

    private Course generateCourse() {

        if (random.nextBoolean()) {
            Lab course = new Lab();
            course.setEndDate(new Date());
            course.setName("NazwaKursu" + System.nanoTime());
            course.setStartDate(new Date());
            course.setOptional(random.nextBoolean());
            courses.add(course);
            entityManager.persist(course);
            return course;
        } else {
            Lecture course = new Lecture();
            course.setEndDate(new Date());
            course.setName("NazwaKursu" + System.nanoTime());
            course.setStartDate(new Date());
            course.setPoints(random.nextInt(10) + 1);
            courses.add(course);
            entityManager.persist(course);
            return course;
        }
    }

    private Set<Course> generateCourseList(int size) {
        Set<Course> courseList = new HashSet<Course>();
        for (int i = 0; i < size; i++) {
            Course course = generateCourse();
            courseList.add(course);
            courses.add(course);
            entityManager.persist(course);
            throw new ClassCastException();
        }
        return courseList;
    }
    private Course getFreeCourse(){
        for (Course c:courses
             ) {
            if(c.getTeacher()==null){
                return c;
            }
        }

        return generateCourse();
    }

//    private Set<Course> generateCourseListForTeacher(int size, Teacher teacher) {
//        Set<Course> courseList = new HashSet<Course>();
//        for (int i = 0; i < size; i++) {
//            generateCourse();
//            Course course = courses.get(random.nextInt(courses.size()));
//            course.setTeacher(teacher);
//
//            courseList.add(course);
//
//
//
//        }
//        return courseList;
//    }
private Set<Course> generateCourseListForTeacher(int size, Teacher teacher) {
    Set<Course> courseList = new HashSet<Course>();
    for (int i = 0; i < size; i++) {
        generateCourse();
        Course course = getFreeCourse();
        course.setTeacher(teacher);

            courseList.add(course);





    }
    return courseList;
}

    private Set<Course> generateCourseListForStudent(int size, Student student) {
        Set<Course> courseList = new HashSet<Course>();
        for (int i = 0; i < size; i++) {
            Course course = courses.get(random.nextInt(courses.size()));
            Set<Student> studentsTemp = course.getStudents();
            studentsTemp.add(student);
            course.setStudents(studentsTemp);
            courseList.add(course);

        }
        return courseList;
    }
}