package limq.struts.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.*;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import limq.hibernate.vo.*;
import java.util.*;
public class CoursesAction extends BaseDispatchAction {

    /** 
     * 查看課程下的班級 
     */ 
    public ActionForward viewClassFromCourse(ActionMapping mapping,
            ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        Integer cour_id = Integer.valueOf((request.getParameter("cour_id")));
        Courses cour = super.getStudentsService().getCourseFromID(cour_id);
        Classes[] clazz =(Classes[])cour.getClasses().toArray(new Classes[0]);
        request.setAttribute("clazz", clazz);
        return mapping.findForward("success");
    }
    /** 
     * 查看詳細班級 
     */ 
    public ActionForward viewClassInfo(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {

        Integer class_id = Integer.valueOf((request.getParameter("class_id")));
        Classes clazz = super.getStudentsService().getClassFromID(class_id);
        ClassesInfo classinfo = clazz.getClassinfo();
        request.setAttribute("classinfo", classinfo);

        return mapping.findForward("success");
    }
    /** 
     * 選擇班級 
     */ 
    public ActionForward selectClass(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response) {

        HttpSession session = request.getSession();
        String stu_name = (String) session.getAttribute("username");
        Students stu = super.getStudentsService().getStudetFromName(stu_name);
        Integer class_id = Integer.valueOf(request.getParameter("class_id"));
        Classes clazz = super.getStudentsService().getClassFromID(class_id);
        Date enrollTime=new Date();       
        boolean flag = super.getStudentsService().ifEnrolSameCourse(clazz, stu);

        ActionMessages errors = new ActionMessages();
        if (flag == true) {
           
            errors.add("errors.class.hadselect", new ActionMessage(
                    "errors.class.hadselect"));
           
            saveErrors(request, errors);
            return new ActionForward(mapping.getInput());
        }
      flag = super.getStudentsService().ifMoreThanCap(clazz);

        if (flag == true) {
           
            errors.add("errors.class.hadselect", new ActionMessage(
                    "errors.class.cap.full"));
            
            saveErrors(request, errors);
            return new ActionForward(mapping.getInput());
        }

        super.getStudentsService().selectClasses(stu, clazz ,enrollTime);
       
        return mapping.findForward("success");

    }
    /** 
     * 查看已選擇的班級 
     */ 
    public ActionForward viewSelectedClasses(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response){
        
        HttpSession session = request.getSession();
        String stu_name = (String) session.getAttribute("username");
        Students stu = super.getStudentsService().getStudetFromName(stu_name);
        Classes [] clazz = (Classes[])stu.getClasses().toArray(new Classes[0]);
        request.setAttribute("clazz",clazz);
        return mapping.findForward("success");
    }
    
}