#Libs
#############################################################

from tkinter import *

#Definitions
#############################################################
student =[
    ]
n = 0
#Classes
#############################################################



#Functions
#############################################################


def createClass(frame, subTeacher, rooTeacher):

    def addStudents():
        print(sNum.get())
        getSNum = int(sNum.get())
        print(type(getSNum))
        for i in range (0,getSNum):
            student.append([i+1,0,0])                           #Adds a row for each student, creating a profile for each student.
        print(len(student))                              #For this instance, i.e. student[0][0] would be student number, student[0][1], overall grade, etc.
        rooTeacher.destroy()
        subTeacher()                        #In order to recheck len(student)

        rooCreate.destroy()


    rooCreate = Toplevel()
    rooCreate.geometry("150x75")

    Label(rooCreate, text = "Enter number of students:").pack()

    stuNum = IntVar()

    sNum = Entry(rooCreate, textvariable = stuNum)
    sNum.pack()
    Button(rooCreate, text = "Enter", command = addStudents).pack()

def Teacher():

    def subTeacher():
        if tU.get() == "admin" and tP.get() == "admin":
            rooTeacher = Toplevel()
            rooTeacher.geometry("300x300")
            rooTeacher.configure(background="Gray")
            rooTeacher.columnconfigure(0, weight=1)
            rooTeacher.rowconfigure(0, weight=1)
            """
            matrix of all students, # 1-30, current grade displayed underneath.
            click on each student, show all submitted homework, grade each homework.
            when all of a students submitted assignments are graded, green checkmark over student.

            """
            #rtCanv = Canvas(rooTeacher, width = 300, height = 300, scrollregion=(0,0,300,300))
            """
            r1 = rtCanv.create_rectangle(10,10,175,50)


            rtCanv.pack()"""


            if (len(student) == 0):
                frame = Frame(rooTeacher, width=300, height=300)
                Button(frame, text = "Create Class", command=lambda: createClass(frame, subTeacher, rooTeacher)).pack(pady=(2,0))
                frame.pack()


            elif (len(student) > 0):
                print(student)
                FMas = Frame(rooTeacher, bg="Gray")
                FMas.grid(sticky='news')
                FMas.columnconfigure(0, weight=1)

                # Add a canvas in that frame
                Can1 = Canvas(FMas, bg="Yellow")
                Can1.grid(row=0, column=0)

               # Link a scrollbar to the canvas
                vsbar = Scrollbar(FMas, orient="vertical", command=Can1.yview)
                vsbar.grid(row=0, column=1, sticky='ns')
                Can1.configure(yscrollcommand=vsbar.set)

                # Create a frame to contain the buttons
                frame_buttons = Frame(Can1, bg="Blue", bd=2, relief=GROOVE)
                Can1.create_window((0,0), window=frame_buttons,anchor='nw')

                # Bind the buttons frame to a function that fixes the Canvas size
                def resize(event):
                    Can1.configure(scrollregion=Can1.bbox("all"), width=235, height=190)
                frame_buttons.bind("<Configure>", resize)


                def studentSheet(studentNum):
                    sheet = Toplevel()
                    sheet.geometry("400x400")
                    print(studentNum)
                    #Label(sheet, text=str(student[i])).pack()


                # Add the buttons to the frame
                rows = 10
                for q in range(1,len(student)+1):

                    studentNum = str(student[q])
                    finHW = ''.join(str(student[q][1]))
                    buttonText = "Student " + str(q) + "  Complete: " + str(finHW) + "   Total Grade: " + str(student[q][2])

                    button = Button(frame_buttons, padx=7, pady=7, width= 30,text=buttonText, anchor=W, command=lambda:studentSheet(studentNum))
                    button.pack()


            else:
                Label(roo, text="Incorrect username or password.").pack()


    loginFrame = Frame(roo, width = 400, bg = "gray")

    tU = StringVar()
    tP = StringVar()

    Label(loginFrame, text="Username:", bg = "gray").pack()
    teachUsr =  Entry(loginFrame, textvariable = tU).pack()
    Label(loginFrame, text="Password:", bg = "gray").pack()
    teachPass = Entry(loginFrame, textvariable = tP, show="*").pack()
    Button(loginFrame, text="Enter", command=subTeacher).pack(pady=(2,0))

    loginFrame.pack()

def Student():
    if (len(student) == 0):
        rooStuNull = Toplevel()
        rooStuNull.geometry("250x50")
        Label(rooStuNull, text = "Teacher has not yet made the class!").pack()
        Button(rooStuNull, text = "Close", command=rooStuNull.destroy).pack()
    else:
        Label(roo, text = "Student Number:").pack()
        Entry(roo).pack()
        Button(roo, text = "Enter").pack(pady=(2,0))


#Main
#############################################################
roo = Tk()
roo.geometry("200x210")

"""
Student Number; Number Ref

Run|Grade

Grade>User input grade>export to excel button
"""
Label(roo, text="Homework Grading Tool v0.1").pack()
Button(roo, text="Teacher", command=Teacher).pack(pady=(2,0))
Button(roo, text="Student", command=Student).pack(pady=(2,0))