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package ee.tlu.htk.dippler.entities;

import java.io.Serializable;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.Lob;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.TableGenerator;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Transient;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlRootElement;

/**
 *
 * @author metz
 */
@XmlRootElement
@Entity
@Table(name = "coursegroup")
@NamedQueries({
    @NamedQuery(name = "Coursegroup.findAll", query = "SELECT c FROM Coursegroup c"),
    @NamedQuery(name = "Coursegroup.findById", query = "SELECT c FROM Coursegroup c WHERE c.id = :id"),
    @NamedQuery(name = "Coursegroup.findByTitle", query = "SELECT c FROM Coursegroup c WHERE c.title = :title"),
    @NamedQuery(name = "Coursegroup.findByCourse", query = "SELECT c FROM Coursegroup c WHERE c.course = :course")
})
public class Coursegroup implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(generator = "CourseGroupID")
    @TableGenerator(name="CourseGroupID", table="id_gen", 
            pkColumnName="ID_NAME", 
            valueColumnName = "ID_VAL",
            pkColumnValue="LAST_COURSE_GROUP",
            allocationSize=1)
    @Basic(optional = false)
    @Column(name = "id")
    private Long id;

    @Column(name = "title")
    private String title;

    @Lob
    @Column(name = "description")
    private String description;
    
    @Column(name = "workspace")
    private String workspace;

    @Basic(optional = false)
    @Column(name = "created")
    @Temporal(TemporalType.TIMESTAMP)
    private Date created;

    @JoinColumn(name = "creator", referencedColumnName = "id")
    @ManyToOne(optional = false, fetch = FetchType.LAZY)
    private User creator;
    
    @OneToMany (cascade= CascadeType.MERGE)
    @JoinTable(name = "coursegroup_member", joinColumns = {
        @JoinColumn(name = "coursegroup", referencedColumnName = "id")}, inverseJoinColumns = {
        @JoinColumn(name = "learner", referencedColumnName = "id")})
    private Collection<Learner> members;

    @JoinTable(name = "assignment_target_group", joinColumns = {
        @JoinColumn(name = "coursegroup_id", referencedColumnName = "id")}, inverseJoinColumns = {
        @JoinColumn(name = "assignment_id", referencedColumnName = "id")})
    @ManyToMany
    private Collection<Assignment> assignments;

    @JoinColumn(name = "course", referencedColumnName = "id")
    @ManyToOne(optional = false)
    private Course course;

    @Transient
    @XmlElement(name="course-id")
    private Long courseId;

    @Transient
    @XmlElementWrapper(name="member-ids")
    @XmlElement(name="member-id")
    public Collection<Long> memberIds;

    public Coursegroup() {
    }

    public Coursegroup(Long id) {
        this.id = id;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getWorkspace() {
        return workspace;
    }

    public void setWorkspace(String workspace) {
        this.workspace = workspace;
    }

    public Date getCreated() {
        return created;
    }

    public void setCreated(Date created) {
        this.created = created;
    }

    public User getCreator() {
        return creator;
    }

    public void setCreator(User user) {
        this.creator = user;
    }

    public Collection<Learner> getMembers() {
        return members;
    }

    public void setMembers(Collection<Learner> userCollection) {
        this.members = userCollection;
    }

    public Course getCourse() {
        return course;
    }

    public void setCourse(Course course) {
        this.course = course;
        if ( !this.course.getGroups().contains(this) ) {
            this.course.addGroup(this);
        }
    }

    public Long getCourseId() {
        return courseId;
    }

/*    public Collection<Long> getMemberIds() {
        return memberIds;
    }*/


    public void setMemberIds(Collection<Long> id) {
        this.memberIds = id;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Coursegroup)) {
            return false;
        }
        Coursegroup other = (Coursegroup) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "ee.tlu.htk.dippler.entities.Coursegroup[id=" + id + "]";
    }

}