def gradeAssignment():
    aID = int(request.form.get("assignmentID"))
    cID = int(request.form.get("classID"))
    for sID in Backend.getStudentsForClass(cID):
        grade = request.form.get(str(sID))
        Backend.gradeAssignment(aID, sID, grade)
    return redirect(url_for("main.assignmentPageTeacher",  classID=cID, assignmentID=aID))
def setTeacherComments():
    aID = int(request.form.get("assignmentID"))
    cID = int(request.form.get("classID"))

    for sID in Backend.getStudentsForClass(cID):
        comment = request.form.get(str(sID))
        Backend.setTeacherComment(aID, sID, comment)
    return redirect(url_for("main.assignmentPageTeacher",  classID=cID, assignmentID=aID))
def classHomepageTeacher():
    cID = int(request.args.get("classID"))

    if Backend.checkTeacherHasClass(current_user.id, cID):
        assignments = []
        for assignmentID in Backend.getClassAssignments(cID):
            assignments.append(
                Backend.getAssignmentInfo(assignmentID)
            )
        students = []
        grades= []
        for studentID in Backend.getStudentsForClass(cID):
            grade = Backend.getFinalGrade(cID, studentID)
            students.append(
                {
                    "StudentID":studentID,
                    "StudentName": Backend.getName(studentID),
                    "StudentGrade": grade if grade != -1 else "-"
                }
            )
            if grade > -1:
                grades.append(grade)

        pageData = {
            "ClassID" : cID,
            "Name" : Backend.getClassName(cID),
            "Time" : Backend.getClassTimes(cID),
            "Location" : Backend.getClassLocations(cID),
            "Assignments" : assignments,
            "Announcements": Backend.getAnnouncementsForClass(cID),
            "Students": students
        }

        n = len(grades)
        if n > 1:
            pageData["Mean"] = str("%.3f" % mean(grades))
            pageData["SD"] = str("%.3f" % stdev(grades))
            pageData["Median"] = median(grades)
        else:
            pageData["Mean"] = "-"
            pageData["SD"] = "-"
            pageData["Median"] = "-"
        return render_template('classHomepageTeacher.html', pageData=pageData)
    else:
        return '', 403
def assignmentPageTeacher():
    cID = request.args.get("classID")
    aID = request.args.get("assignmentID")
    if Backend.checkTeacherHasClass(current_user.id, cID) and Backend.classHasAssignment(cID, aID):
        pageData = Backend.getAssignmentInfo(aID)
        pageData["ClassID"] = cID
        students = []
        grades = []
        for student in Backend.getStudentsForClass(cID):
            curGrade = Backend.getGrade(aID, student)
            if type(curGrade) is str:
                curGrade = -1
            if curGrade < 0:
                curGrade = "Not Graded"
            else:
                grades.append(curGrade)

            temp = {
                "ID": student,
                "Name":Backend.getName(student),
                "CurrentGrade": curGrade,
                "GradeDiscrep": Backend.getDiscrepFlag(aID, student),
                "CurrentComment": Backend.getTeacherComment(aID, student),
                "Student Comment": Backend.getStudentComment(aID, student)
            }
            students.append(temp)
        pageData["Students"] = students
        n = len(grades)
        if n > 1:
            pageData["Mean"] = str("%.3f" % mean(grades))
            pageData["SD"] = str("%.3f" % stdev(grades))
            pageData["Median"] = median(grades)
        else:
            pageData["Mean"] = "-"
            pageData["SD"] = "-"
            pageData["Median"] = "-"
        pageData["Complete"] = n
        pageData["Missing"] = len(students) - n
        return render_template("assignmentPageTeacher.html", pageData=pageData)
    else:
        return '', 403