import pickle


# Please make below file 'REPORT_CARD.dat' manually


file = 'REPORT_CARD.dat'

PT1 = {}

Half_Yearly = {}

PT2 = {}

Finals = {}

strm = ''

grade = ''


# All the basic details of student --> name, admno. dob, gender, stream

def FormerDetails():        

    global strm

    nme = input("Enter student name: ")

    Adm = int(input("Enter adm no.: "))

    dob = input("Enter dob: ")

    gen = input("Enter gender: ")

    strm = input("Enter stream(Hindi(H)/CS(C) ~ Maths(M)/Bio(B): ")

    d = {}

    all = [nme, Adm, dob, gen, strm]

    headers = ['Name', 'AdmNo.', "DOB", "Gender", "Stream"]


    for i in range(len(headers)):

        d[headers[i]] = all[i]


    with open(file, 'ab') as bf:

        pickle.dump(d, bf)


# Taking input from user of marks of a particular exam according to the exam(pt1, pt2, etc) passed to func. 

def MarksInput(examname, exam, S):

    print("******" + examname + " marks******")

    eng = int(input("Enter English marks: "))

    exam['English  '] = eng                 # Ignore spaces in keys

    phy = int(input("Enter Physics marks: "))

    exam['Physics  '] = phy

    chem = int(input("Enter Chemistry marks: "))

    exam['Chemistry'] = chem

    if 'C' in S.upper():

        cs = int(input("Enter Comp.Sc. marks: "))

        exam['Comp.Sc. '] = cs

    if 'M' in S.upper():

        maths = int(input("Enter Maths marks: "))

        exam['Maths    '] = maths

    if 'B' in S.upper():

        bio = int(input("Enter Biology marks: "))

        exam['Biology  '] = bio

    if 'H' in S.upper():

        hin = int(input("Enter Hindi marks: "))

        exam['Hindi    '] = hin


# Func. that counts total marks of a specific subject when passed to func.

def TotalMarks(subject):

    Total = PT1[subject] + Half_Yearly[subject] + PT2[subject] + Finals[subject]

    # print(subject, Total)

    if Total <= 200 and Total > 180:

        grade = 'A'

    elif Total <= 180 and Total > 160:

        grade = 'B'

    elif Total <= 160 and Total > 140:

        grade = 'C'

    elif Total <= 140 and Total > 120:

        grade = 'D'

    elif Total < 120:

        grade = 'E'

    else:

        grade = ''

    return subject, Total, grade


# Func. that adds final info of student(total marks of all sub. and percent)

def AddTotals(stm):

    Teng = TotalMarks("English  ")

    Tchem = TotalMarks("Chemistry")

    Tphy = TotalMarks("Physics  ")

    if 'C' in stm.upper():

        Tcs = TotalMarks("Comp.Sc. ")

        Thin = (None, 0, None)      # --- statement 1

    if 'M' in stm.upper():

        Tmath = TotalMarks("Maths    ")

        Tbio = (None, 0, None)

    if 'B' in stm.upper():

        Tbio = TotalMarks("Biology  ")

        Tmath = (None, 0, None)

    if 'H' in stm.upper():

        Thin = TotalMarks("Hindi    ")

        Tcs = (None, 0, None)

    

    # statement1 like statements throws error in below statement if not defined

    marks = (Teng[1], Tchem[1], Tphy[1], Tmath[1], Tcs[1], Tbio[1], Thin[1])  

    Tmarks = sum(marks)

    per = (Tmarks/1000)*100                 # 200 marks * 5 subjects = 1000

    per = str(per)+"%"                      # Percentage is string

    with open(file, 'ab') as bf:

        for i in (Teng, Tchem, Tphy, Tmath, Tcs, Tbio, Thin):

            pickle.dump(i, bf)

        pickle.dump(per, bf)


def ParticularData(nme, rno):

    BOOL = False

    lst = []

    with open(file, 'rb') as bf:

        while True:

            try:

                data = pickle.load(bf)

                if BOOL == True:

                    lst.append(data)

                    if isinstance(data, str):   # If data is percentage then stop adding

                        BOOL = False

                        break

                elif nme == data.get("Name") and rno == data.get("AdmNo."): # If condition

                    BOOL = True            # matches start adding

                    lst.append(data)

                else:

                    continue

            except EOFError:

                print("No such data found!")

                break

            except AttributeError:    # get func. doesn't exist in tuple and throws error

                continue

    return lst


def DisplayAll():

    bf = open(file, 'rb') 

    try:

        while True:

            print(pickle.load(bf))

    except:

        bf.close()


# Func. that deletes particular student data

def DeleteData(nme, rno):

    deldata = ParticularData(nme, rno)

    lst = []

    bf = open(file, 'rb')

    try:

        while True:

            oldata = pickle.load(bf)

            if oldata not in deldata:

                lst.append(oldata)

    except EOFError:

        bf.close()

    with open(file, 'wb') as bf:

        for i in lst:

            pickle.dump(i, bf)


def ReportCardFormat(data):

    if len(data) == 0:

        return None

    k1, v1 = data[0].keys(), data[0].values()

    k2 = data[1].keys()         # Getting all subjects name

    v2 = data[1].values()       # PT1 marks

    v3 = data[2].values()       # Half yearly marks

    v4 = data[3].values()       # PT2 marks

    v5 = data[4].values()       # Finals marks

    totals = []

    for i in data:

        if isinstance(i, tuple) and i[0] is not None:   # statement1 like staements are ignored

            totals.append(i)         # total marks & grades

    k1, k2, v1, v2, v3, v4, v5 = list(k1), list(k2), list(v1), list(v2), list(v3), list(v4), list(v5)


    for i in range(len(k1)):

        print(k1[i], ' : ', v1[i])

    print()

    print("Subjects      |     PT1    | Half Yearly|    PT2     |    Finals  |    Total   |  Grade")

    for i in range(5):

        print(k2[i], end= '     |     ')

        print(v2[i], end= '     |     ')

        print(v3[i], end= '     |     ')

        print(v4[i], end= '     |     ')

        print(v5[i], end= '     |     ')

        print(totals[i][1], end= '     |     ')

        print(totals[i][-1])

    else:

        print("Percentage: ", data[-1])        


# Func. that can modify student name, admno, dob, gender 

def ModifyData(stud, rno, ch, newdata):

    studata = ParticularData(stud, rno)

    for i in studata:

        if ch == 1:

            if isinstance(i, dict) and stud == i.get("Name"):

                i["Name"] = newdata

        elif ch == 2:

            if isinstance(i, dict) and stud == i.get("Name"):

                i["AdmNo."] = newdata

        elif ch == 3:

            if isinstance(i, dict) and stud == i.get("Name"):

                i["DOB"] = newdata

        elif ch == 4:

            if isinstance(i, dict) and stud == i.get("Name"):

                i["Gender"] = newdata

        

    DeleteData(stud, rno)

    with open(file, 'ab') as bf:

        for i in studata:

            pickle.dump(i, bf)


while True:

    print("*******************************************************************************************\n")

    n = int(input("1 to input student details\n 2 to modify student details\n  3 to display student details\n   4 to see student report card\n    5 to delete student details\n     6 to exit\n"))


    if n == 1:

        FormerDetails()

        with open(file, 'ab+') as bf:

            MarksInput("Periodic Test I(40)", PT1, strm)

            pickle.dump(PT1,bf)

            MarksInput("Half Yearly(60)", Half_Yearly, strm)

            pickle.dump(Half_Yearly,bf)

            MarksInput("Periodic Test II(40)", PT2, strm)

            pickle.dump(PT2,bf)

            MarksInput("Finals(60)", Finals, strm)

            pickle.dump(Finals,bf)

        AddTotals(strm)


    elif n == 2:

        stud = input("Enter which student detail you want to change: ")

        rollno = int(input("Enter roll no. of student: "))

        ch = int(input("Enter what do you want to change\n1. name,\n2. admno,\n3. dob\n4. gender: \n"))

        if ch == 1:

            newname = input("Enter new name: ")

            ModifyData(stud, rollno, ch, newname)

        elif ch == 2 :

            newadm = int(input("Enter new admission number: "))

            ModifyData(stud, rollno, ch, newadm)

        elif ch == 3:

            newdob = input("Enter new dob of a student: ")

            ModifyData(stud, rollno, ch, newdob)   

        elif ch == 4:

            newgen = input("male(m) or female(f): ")         

            ModifyData(stud, rollno, ch, newgen)


    elif n == 3:

        DisplayAll()


    elif n == 4:

        name = input("Enter student name: ")

        rollno = int(input("Enter student roll no.: "))

        d = ParticularData(name, rollno)

        ReportCardFormat(d)


    elif n == 5:

        name = input("Enter student name: ")

        rollno = int(input("Enter student roll no.: "))

        DeleteData(name, rollno)


    elif n == 6:

        break

    else:

        print("Invalid input")

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