package dao;
import java.util.ArrayList;
import java.util.List;
import model.Mahasiswa;
import model.ObjectPaging;
import org.hibernate.Query;
import org.hibernate.Session;
public class MahasiswaDAO {
    int mahasiswaPerPage=20;
    public MahasiswaDAO() {
    }
    public boolean nomorIndukIsUsed(String nomorInduk) throws Exception {
        HibernateUtil.beginTransaction();
        Session session=HibernateUtil.getSession();
        Mahasiswa mahasiswa=null;
        boolean isUsed=false;
        try {
            mahasiswa=(Mahasiswa)session.createQuery("SELECT mahasiswa FROM Mahasiswa mahasiswa WHERE mahasiswa.nomorInduk= :input")
            .setParameter("input",nomorInduk).uniqueResult();
            if(mahasiswa!=null) {
                isUsed=true;
            }
        } catch(Exception ex) {
            throw ex;
        }
        return isUsed;
    }
    public Mahasiswa loadMahasiswa(long id) throws Exception {
        HibernateUtil.beginTransaction();
        Session session=HibernateUtil.getSession();
        Mahasiswa mahasiswa=null;
        try {
            mahasiswa=(Mahasiswa)session.load(Mahasiswa.class,id);
        } catch(Exception ex) {
            throw ex;
        }
        return mahasiswa;
    }
    public Mahasiswa login(String nomorInduk,String password) throws Exception {
        HibernateUtil.beginTransaction();
        Session session=HibernateUtil.getSession();
        Mahasiswa mahasiswa=null;
        try {
            mahasiswa=(Mahasiswa)session.createQuery("SELECT mahasiswa FROM Mahasiswa mahasiswa WHERE mahasiswa.nomorInduk= :input")
            .setParameter("input",nomorInduk).uniqueResult();
            if(mahasiswa!=null) {
                if(!mahasiswa.getPassword().equals(password)) {
                    mahasiswa=null;
                }
            }
        } catch(Exception ex) {
            throw ex;
        }
        return mahasiswa;
    }
    public Mahasiswa getMahasiswa(String nomorInduk) throws Exception{
        HibernateUtil.beginTransaction();
        Session session=HibernateUtil.getSession();
        Mahasiswa mahasiswa=null;
        try {
            mahasiswa=(Mahasiswa)session.createQuery("SELECT mahasiswa FROM Mahasiswa mahasiswa WHERE mahasiswa.nomorInduk= :input")
            .setParameter("input",nomorInduk).uniqueResult();
        } catch(Exception ex) {
            throw ex;
        }
        return mahasiswa;
    }
    //=======NO PAGING=======
    public List getListMahasiswa() throws Exception {
        HibernateUtil.beginTransaction();
        Session session=HibernateUtil.getSession();
        List list=new ArrayList();
        try {
            list=session.createQuery("FROM Mahasiswa").list();
        } catch(Exception ex) {
            throw ex;
        }
        return list;
    }
    //=======NO PAGING=======
    //=======PAGING=======
    public ObjectPaging getListMahasiswa(int pageNumber) throws Exception {
        HibernateUtil.beginTransaction();
        ObjectPaging objectPaging=new ObjectPaging();
        int totalItem=getListMahasiswa().size();
        int totalPage=totalItem/mahasiswaPerPage;
        if(totalItem%mahasiswaPerPage>0)totalPage++;
        if(pageNumber<1) {
            pageNumber=1;
        }
        if(pageNumber>totalPage) {
            pageNumber=totalPage;
        }
        Session session=HibernateUtil.getSession();
        List list=new ArrayList();
        try {
            Query query=session.createQuery("FROM Mahasiswa");
            list=query.setFirstResult(mahasiswaPerPage*(pageNumber-1))
            .setMaxResults(mahasiswaPerPage).list();
        } catch(Exception ex) {
            throw ex;
        }
        int beginPagePaging=pageNumber-5;
        int endedPagePaging=pageNumber+5;
        if(beginPagePaging<1) {
            beginPagePaging=1;
            endedPagePaging=11;
            if(endedPagePaging>totalPage) {
                endedPagePaging=totalPage;
            }
        } else if(endedPagePaging>totalPage) {
            endedPagePaging=totalPage;
            beginPagePaging=totalPage-10;
            if(beginPagePaging<1) {
                beginPagePaging=1;
            }
        }
        List listPaging=new ArrayList();
        for(int i=beginPagePaging;i<=endedPagePaging;i++) {
            listPaging.add(i);
        }
        objectPaging.setListObject(list);
        objectPaging.setListPaging(listPaging);
        objectPaging.setPageNumber(pageNumber);
        objectPaging.setTotalPage(totalPage);
        return objectPaging;
    }
    //=======PAGING=======
}