student.py

import json
def import_data_from_json(file_path):
    global students
    try:
        with open(file_path, 'r') as file:
            students = json.load(file)
        print("Data imported successfully.")
    except Exception as e:
        print(f"Error importing data: {e}")

def register_the_student(student_id,student_name,student_batch):
        if student_id in students:
            print("Student ID already exists.") 
            return
        students[student_id]={
            "name": student_name,
            "batch": student_batch,
            "attendance": {
                "total_days": 0,
                "present_days": 0
            },
            "terms": {} 
        }
        print(f"Student {student_name} registered successfully with ID {student_id}.")

def add_term_result(student_id, term_name, subject_marks_dict):
    if student_id not in students:
        print(f"Student {student_id} not found.")
        return
    students[student_id]["terms"][term_name] = subject_marks_dict

def record_attendance(student_id, total_days, present_days):
    if student_id not in students:
        print(f"Student {student_id} not found.")
        return
    students[student_id]["attendance"]["total_days"] += total_days
    students[student_id]["attendance"]["present_days"] += present_days



def calculate_attendance_percentage(student_id):
    if student_id not in students:
        print(f"Student {student_id} not found.")
        return 0
    attendance = students[student_id]["attendance"]
    if attendance["total_days"] == 0:
        return 0
    return (attendance["present_days"] / attendance["total_days"]) * 100

def get_topper_by_term(term_name):
    top_student_id = None
    top_student_name = None
    top_avg = -1
    for student_id, student_info in students.items():
        if term_name in student_info["terms"]:
            marks = student_info["terms"][term_name].values()
            avg = sum(marks) / len(marks) if marks else 0
            if avg > top_avg:
                top_avg = avg
                top_student_id = student_id
                top_student_name = student_info["name"]
    return top_student_name, top_avg
def generate_student_report(student_id):
    if student_id in students:
        students_info = students[student_id]
        print(f"Student Report : {students_info['name']}({student_id})")
        print(f"Batch: {students_info['batch']}")
        attendance_percentage = calculate_attendance_percentage(student_id)
        print(f"Attendance Percentage: {attendance_percentage:.2f}%")
        print("Term Averages:")
        overall_average = 0
        cnt=0
        for term, marks in students_info["terms"].items():
            average_marks = sum(marks.values()) / len(marks) if marks else 0
            print(f"{term}: {average_marks:.2f}")
            overall_average += sum(marks.values()) / len(marks) if marks else 0
            cnt+=1
        print(f"Overall Average: {overall_average/cnt:.2f}")
        
    else:
        print(f"Student {student_id} not found.")
        return
def rank_students_by_overall_average(batch):
    ranked = []
    for sid, info in students.items():
        if info["batch"] == batch:
            terms = info["terms"]
            total = 0
            count = 0
            for marks in terms.values():
                total += sum(marks.values())
                count += len(marks)
            avg = total / count if count > 0 else 0
            ranked.append((sid, info["name"], avg))
    ranked.sort(key=lambda x: x[2], reverse=True)
    return ranked

def export_data_to_json(file_path):
    try:
        with open(file_path, 'w') as file:
            json.dump(students, file, indent=4)

    except Exception as e:
        print(f"Error exporting data: {e}")

if __name__ == "__main__":
    import_data_from_json("students.json")
    print("Welcome to the Student Registration System")
    print("CASE 1: Register a new student")
    print("CASE 2 :ALREADY REGISTERED STUDENT ")
    print("CASE 3 : GENERATE REPORT FOR STUDENT")
    print("CASE 4 : GET TOP PERFORMER BY TERM")
    print("CASE 5 : ADD TERM RESULTS")
    print("CASE 6 : ADD ATTENDANCE")
    print("CASE 7 : RANK STUDENTS BY OVERALL AVERAGE BY BATCH")
    case_choice = input("Enter your choice : ")

    if case_choice == "1":
        student_id=input("Enter student ID to register: ")
        student_name=input("Enter student name: ")
        student_batch=input("Enter student batch: ")
        register_the_student(student_id, student_name, student_batch)

    elif case_choice == "2":
        print("operation 1 : Add Term Results")
        print("operation 2 : Add Attendance")
        choice=input("Enter Your Operation Choice: ")
        if choice =="1":
            student_id=input("Enter student ID to add term results: ")
            term_name=input("Enter term name: ")
            subject_marks_dict = {}
            subjects = ["Maths", "Science", "English"]
            for subject in subjects:
                subject_marks_dict[subject] = int(input(f"Enter marks for {subject}: "))
            add_term_result(student_id, term_name, subject_marks_dict)
        elif choice == "2":
            student_id = input("Enter student ID to record attendance: ")
            total_days = int(input("Enter total days: "))
            present_days = int(input("Enter present days: "))
            record_attendance(student_id, total_days, present_days)

    elif case_choice == "3":
        student_id = input("Enter student ID to generate report: ")
        generate_student_report(student_id)
        
        top_student=None
        top_avg=float('-inf')
        for sid in students:
            terms=students[sid]["terms"]
            tot=0
            cnt=0
            for marks in terms.values():
                tot+=sum(marks.values())/len(marks) if marks else 0
                cnt+=1
            avg=tot/cnt if cnt>0 else 0
            if avg >top_avg:
                top_avg=avg
                top_student=students[sid]["name"]  
        if top_student:
            print(f"Top Performer: {top_student} with {top_avg:.2f} average")          


    elif case_choice == "4":
        term_name = input(f"Enter term name to get top performer: ")
        name, avg = get_topper_by_term(term_name)
        if name:
            print(f"Top Performer: {name} in {term_name} with {avg:.2f} average")
        else:
            print(f"No data found for term '{term_name}'.")

    elif case_choice == "5":
        student_id = input("Enter student ID to add term results: ")
        term_name = input("Enter term name: ")
        subject_marks_dict = {}
        subjects = ["Maths", "Science", "English"]
        for subject in subjects:
            subject_marks_dict[subject] = int(input(f"Enter marks for {subject}: "))
        add_term_result(student_id, term_name, subject_marks_dict)

    elif case_choice == "6":
        student_id = input("Enter student ID to add attendance: ")
        total_days = int(input("Enter total days: "))
        present_days = int(input("Enter present days: "))
        record_attendance(student_id, total_days, present_days)

    elif case_choice == "7":
        batch = input("Enter batch to rank students: ")
        ranked_students = rank_students_by_overall_average(batch)
        if ranked_students:
            print(f"Ranked Students in Batch {batch}:")
            for rank, (sid, name, avg) in enumerate(ranked_students, start=1):
                print(f"{rank}. {name} ({sid}) - Average: {avg:.2f}")
        else:
            print(f"No students found in batch '{batch}'.")

    export_data_to_json("students.json")