package web;

import ejbs.CourseBean;
import ejbs.StudentBean;
import entities.Course;
import entities.Student;
import javax.inject.Named;
import javax.enterprise.context.SessionScoped;
import java.io.Serializable;
import java.util.List;
import java.util.logging.Logger;
import javax.ejb.EJB;
import javax.faces.component.UIParameter;
import javax.faces.event.ActionEvent;

@Named(value = "administratorManager")
@SessionScoped
public class AdministratorManager implements Serializable {

    private static final Logger logger = Logger.getLogger("web.AdministratorManager");
    @EJB
    private StudentBean studentBean;
    @EJB
    private CourseBean courseBean;

    private Student currentStudent;

    private Course currentCourse;

    private String newStudentUsername;
    private String newStudentPassword;
    private String newStudentName;
    private String newStudentEmail;
    private int newStudentCourseCode;

    private int newCourseCode;
    private String newCourseName;

    public AdministratorManager() {
    }

    public String createStudent() {
        try {
            studentBean.create(
                    newStudentUsername,
                    newStudentPassword,
                    newStudentName,
                    newStudentEmail,
                    newStudentCourseCode);
            clearNewStudent();
        } catch (Exception e) {
            logger.warning("Problem creating student in method creatStudent.");
        }
        return "index?faces-redirect=true";
    }

    public String createCourse() {
        try {
            courseBean.create(
                    newCourseCode,
                    newCourseName);
            clearNewCourse();
        } catch (Exception e) {
            logger.warning("Problem creating course in method creatCourse.");
        }
        return "admin_courses_list?faces-redirect=true";
    }

    private void clearNewStudent() {
        newStudentUsername = null;
        newStudentPassword = null;
        newStudentName = null;
        newStudentEmail = null;
        newStudentCourseCode = 0;
    }

    private void clearNewCourse() {
        newCourseCode = 0;
        newCourseName = null;
    }

    public List<Student> getAllStudents() {
        try {
            return studentBean.getAll();
        } catch (Exception e) {
            logger.warning("Problem getting all students in method getAllStudants.");
            return null;
        }
    }

    public String updateStudent() {
        try {
            studentBean.update(currentStudent.getUsername(),
                    currentStudent.getPassword(),
                    currentStudent.getName(),
                    currentStudent.getEmail(),
                    newStudentCourseCode);
            newStudentCourseCode = -1;
        } catch (Exception e) {
            logger.warning("Problem updating student in method updateStudent.");
            return "admin_students_update";
        }
        return "index?faces-redirect=true";
    }

    public String updateCourse() {
        try {
            courseBean.update(currentCourse.getCode(),
                    currentCourse.getName());
        } catch (Exception e) {
            logger.warning("Problem updating course in method updateCourse.");
            return "admin_courses_update";
        }
        return "admin_courses_list?faces-redirect=true";
    }

    public String removeStudent(ActionEvent event) {
        try {
            UIParameter param = (UIParameter) event.getComponent().findComponent("deleteStudentId");
            String username = param.getValue().toString();
            studentBean.remove(username);
        } catch (Exception e) {
            logger.warning("Problem removing student in method removeStudent.");
        }
        return "index?faces-redirect=true";
    }

    public String removeCourse(ActionEvent event) {
        try {
            UIParameter param = (UIParameter) event.getComponent().findComponent("deleteCourseCode");
            int code = Integer.parseInt(param.getValue().toString());
            courseBean.remove(code);
        } catch (Exception e) {
            logger.warning("Problem deleting student in method removeStudent.");
        }
        return "admin_courses_list?faces-redirect=true";
    }

    public String getNewStudentUsername() {
        return newStudentUsername;
    }

    public void setNewStudentUsername(String newStudentUsername) {
        this.newStudentUsername = newStudentUsername;
    }

    public String getNewStudentPassword() {
        return newStudentPassword;
    }

    public void setNewStudentPassword(String newStudentPassword) {
        this.newStudentPassword = newStudentPassword;
    }

    public String getNewStudentName() {
        return newStudentName;
    }

    public void setNewStudentName(String newStudentName) {
        this.newStudentName = newStudentName;
    }

    public String getNewStudentEmail() {
        return newStudentEmail;
    }

    public void setNewStudentEmail(String newStudentEmail) {
        this.newStudentEmail = newStudentEmail;
    }

    public Student getCurrentStudent() {
        return currentStudent;
    }

    public void setCurrentStudent(Student currentStudent) {
        this.currentStudent = currentStudent;
    }

    public List<Course> getAllCourses() {
        try {
            return courseBean.getAll();
        } catch (Exception e) {
            logger.warning("Problem getting all courses in method getAllCourses.");
            return null;
        }
    }

    public int getNewStudentCourseCode() {
        return newStudentCourseCode;
    }

    public void setNewStudentCourseCode(int newStudentCourseCode) {
        this.newStudentCourseCode = newStudentCourseCode;
    }

    public int getNewCourseCode() {
        return newCourseCode;
    }

    public void setNewCourseCode(int newCourseCode) {
        this.newCourseCode = newCourseCode;
    }

    public String getNewCourseName() {
        return newCourseName;
    }

    public void setNewCourseName(String newCourseName) {
        this.newCourseName = newCourseName;
    }

    public Course getCurrentCourse() {
        return currentCourse;
    }

    public void setCurrentCourse(Course currentCourse) {
        this.currentCourse = currentCourse;
    }


}