package net.sourceforge.fenixedu.dataTransferObject.delegate;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import net.sourceforge.fenixedu.domain.CurricularCourse;
import net.sourceforge.fenixedu.domain.DomainReference;
import net.sourceforge.fenixedu.domain.Enrolment;
import net.sourceforge.fenixedu.domain.ExecutionSemester;
import net.sourceforge.fenixedu.domain.ExecutionYear;
import net.sourceforge.fenixedu.domain.student.Student;

import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.comparators.ComparatorChain;

public class DelegateCurricularCourseBean implements Serializable {
    private DomainReference<CurricularCourse> curricularCourse;

    private DomainReference<ExecutionYear> executionYear;

    private DomainReference<ExecutionSemester> executionSemester;

    private List<DomainReference<Student>> enrolledStudents;

    private Integer curricularYear;

    static final public Comparator CURRICULAR_COURSE_COMPARATOR_BY_CURRICULAR_YEAR_AND_CURRICULAR_SEMESTER = new ComparatorChain();
    static {
	((ComparatorChain) CURRICULAR_COURSE_COMPARATOR_BY_CURRICULAR_YEAR_AND_CURRICULAR_SEMESTER)
		.addComparator(new BeanComparator("curricularYear"));
	((ComparatorChain) CURRICULAR_COURSE_COMPARATOR_BY_CURRICULAR_YEAR_AND_CURRICULAR_SEMESTER)
		.addComparator(new BeanComparator("curricularSemester"));
    }

    public DelegateCurricularCourseBean(CurricularCourse curricularCourse, ExecutionYear executionYear, Integer curricularYear,
	    ExecutionSemester executionSemester) {
	setCurricularCourse(curricularCourse);
	setExecutionYear(executionYear);
	setCurricularYear(curricularYear);
	setExecutionPeriod(executionSemester);
    }

    public CurricularCourse getCurricularCourse() {
	return (curricularCourse == null ? null : curricularCourse.getObject());
    }

    public void setCurricularCourse(CurricularCourse curricularCourse) {
	this.curricularCourse = new DomainReference<CurricularCourse>(curricularCourse);
    }

    public ExecutionYear getExecutionYear() {
	return (executionYear == null ? null : executionYear.getObject());
    }

    public void setExecutionYear(ExecutionYear executionYear) {
	this.executionYear = new DomainReference<ExecutionYear>(executionYear);
    }

    public ExecutionSemester getExecutionPeriod() {
	return (executionSemester == null ? null : executionSemester.getObject());
    }

    public void setExecutionPeriod(ExecutionSemester executionSemester) {
	this.executionSemester = new DomainReference<ExecutionSemester>(executionSemester);
    }

    public List<Student> getEnrolledStudents() {
	List<Student> result = new ArrayList<Student>();
	for (DomainReference<Student> studentDR : this.enrolledStudents) {
	    result.add(studentDR.getObject());
	}
	return result;
    }

    public void setEnrolledStudents(List<Student> students) {
	this.enrolledStudents = new ArrayList<DomainReference<Student>>();
	for (Student student : students) {
	    this.enrolledStudents.add(new DomainReference<Student>(student));
	}
    }

    public void calculateEnrolledStudents() {
	List<Student> enrolledStudents = new ArrayList<Student>();
	for (Enrolment enrolment : getCurricularCourse().getEnrolmentsByExecutionPeriod(getExecutionPeriod())) {
	    enrolledStudents.add(enrolment.getRegistration().getStudent());

	}
	Collections.sort(enrolledStudents, Student.NUMBER_COMPARATOR);
	setEnrolledStudents(enrolledStudents);
    }

    public Integer getSemester() {
	return getCurricularSemester();
    }

    public Integer getCurricularSemester() {
	return getExecutionPeriod().getSemester();
    }

    public Integer getCurricularYear() {
	return curricularYear;
    }

    public void setCurricularYear(Integer curricularYear) {
	this.curricularYear = curricularYear;
    }

    public Integer getEnrolledStudentsNumber() {
	if (this.enrolledStudents != null) {
	    return this.enrolledStudents.size();
	}
	return 0;
    }

    @Override
    public boolean equals(Object obj) {
	return obj instanceof DelegateCurricularCourseBean ? equals((DelegateCurricularCourseBean) obj) : false;
    }

    public boolean equals(DelegateCurricularCourseBean delegateCurricularCourseBean) {
	return getCurricularCourse().equals(delegateCurricularCourseBean.getCurricularCourse())
		&& getCurricularYear().equals(delegateCurricularCourseBean.getCurricularYear())
		&& getExecutionPeriod().equals(delegateCurricularCourseBean.getExecutionPeriod())
		&& getExecutionYear().equals(delegateCurricularCourseBean.getExecutionYear());
    }

    @Override
    public int hashCode() {
	return getCurricularCourse().hashCode() + getCurricularYear().hashCode() + getExecutionPeriod().hashCode()
		+ getExecutionYear().hashCode();
    }
}