students = {
    "Ali": {"credits": 70, "gpa": 17.8},
    "Sara": {"credits": 95, "gpa": 18.5},
    "Reza": {"credits": 40, "gpa": 15.2},
    "Nima": {"credits": 120, "gpa": 18.1},
    "Parsa": {"credits": 55, "gpa": 16.4},
    "Arman": {"credits": 80, "gpa": 17.1},
    "Mina": {"credits": 140, "gpa": 19.0},
    "Ava": {"credits": 35, "gpa": 16.8},
    "Yasmin": {"credits": 110, "gpa": 18.7},
    "Amir": {"credits": 65, "gpa": 15.9}
}

TOTAL_CREDITS = 140


def get_academic_level(gpa):
    if gpa >= 18:
        return "Excellent"
    elif gpa >= 16:
        return "Good"
    elif gpa >= 14:
        return "Average"
    else:
        return "Needs Improvement"


def get_status(credits):
    if credits >= TOTAL_CREDITS:
        return "Graduated"
    else:
        return "In Progress"


def show_student_info(name):
    credits = students[name]["credits"]
    gpa = students[name]["gpa"]

    remaining_credits = TOTAL_CREDITS - credits
    progress_percentage = (credits / TOTAL_CREDITS) * 100
    status = get_status(credits)
    academic_level = get_academic_level(gpa)

    print("\n------ Student Information ------")
    print("Name:", name)
    print("Credits Passed:", credits)
    print("GPA:", gpa)
    print("Remaining Credits:", remaining_credits)
    print(f"Progress Percentage: {progress_percentage:.2f}%")
    print("Status:", status)
    print("Academic Level:", academic_level)


def calculate_average_gpa():
    total_gpa = 0

    for student in students:
        total_gpa += students[student]["gpa"]

    return total_gpa / len(students)


def find_top_student():
    top_student = None
    top_gpa = 0

    for student in students:
        gpa = students[student]["gpa"]

        if gpa > top_gpa:
            top_gpa = gpa
            top_student = student

    return top_student, top_gpa


def show_above_average_students(average_gpa):
    print("\nStudents With GPA Above Average:")

    for student in students:
        gpa = students[student]["gpa"]

        if gpa > average_gpa:
            print(student, "-", gpa)


student_name = input("Enter student name: ").strip().title()

if student_name in students:
    show_student_info(student_name)

    top_student, top_gpa = find_top_student()
    average_gpa = calculate_average_gpa()

    print("\n------ Class Analytics ------")
    print(f"Top Student: {top_student} ({top_gpa})")
    print(f"Average GPA of All Students: {average_gpa:.2f}")

    show_above_average_students(average_gpa)

else:
    print("Student not found")

# Create and write file
with open("students.txt", "w") as file:
    file.write("Ali,17.8\n")
    file.write("Sara,18.5\n")
    file.write("Reza,15.2\n")
    file.write("Nima,18.1\n")
    file.write("Parsa,16.4\n")

# Read file
students = []

with open("students.txt", "r") as file:
    for line in file:
        name, gpa = line.strip().split(",")
        students.append((name, float(gpa)))

# Total students
total_students = len(students)

# Calculate average GPA
total_gpa = 0
top_student = ""
top_gpa = -1

for name, gpa in students:
    total_gpa += gpa

    if gpa > top_gpa:
        top_gpa = gpa
        top_student = name

average_gpa = total_gpa / total_students

# Bonus: students above 18
above_18 = []

for name, gpa in students:
    if gpa > 18:
        above_18.append((name, gpa))

# Output
print("Total Students:", total_students)
print("Average GPA:", round(average_gpa, 1))

print("\nTop Student:")
print(f"{top_student} ({top_gpa})")

print("\nStudents with GPA > 18:")
for name, gpa in above_18:
    print(f"{name} ({gpa})")

import csv
class Student:
    def __init__(self, name, gpa, credits):
        self.name = name
        self.gpa = gpa
        self.credits = credits

    def get_status(self):
        if self.credits >= 120:
            return "Graduated"

        return "In Progress"

    def show_info(self):
        print(f"Name: {self.name}")
        print(f"GPA: {self.gpa}")
        print(f"Credits: {self.credits}")
        print(f"Status: {self.get_status()}")

def load_students(filename):
    students = []

    try:
        with open(filename, "r", encoding="utf-8") as file:
            reader = csv.DictReader(file)

            for row in reader:
                student = Student(
                    name=row["name"].strip(),
                    gpa=float(row["gpa"]),
                    credits=int(row["credits"])
                )
                students.append(student)

    except FileNotFoundError:
        print(f"Error: {filename} was not found.")

    except (ValueError, KeyError):
        print("Error: Invalid data in CSV file.")

    except OSError as error:
        print(f"Error reading file: {error}")

    return students

def show_summary(students):
    if not students:
        print("No student data available.")
        return

    average_gpa = sum(student.gpa for student in students) / len(students)
    top_student = max(students, key=lambda student: student.gpa)

    high_gpa_students = [
        student for student in students
        if student.gpa >= 18
    ]

    low_gpa_students = [
        student for student in students
        if student.gpa < 16
    ]

    print("\n= Student Analysis System =")

    print(f"\nTotal Students: {len(students)}")
    print(f"Average GPA: {average_gpa:.2f}")
    print(
        f"Top Student: {top_student.name} "
        f"({top_student.gpa})"
    )

    print("\nStudents With GPA >= 18:")

    for student in high_gpa_students:
        print(student.name)

    print(f"\nCount: {len(high_gpa_students)}")

    print("\nStudents With GPA < 16:")

    for student in low_gpa_students:
        print(student.name)

    print(f"\nCount: {len(low_gpa_students)}")


def search_student(students):
    name = input("\nEnter student name: ").strip()

    if not name:
        print("Please enter a valid name.")
        return

    for student in students:
        if student.name.lower() == name.lower():
            print()
            student.show_info()
            return

    print("Student not found!")

def show_top_students(students):
    top_students = sorted(
        students,
        key=lambda student: student.gpa,
        reverse=True
    )

    print("\n= Top Students =")

    for rank, student in enumerate(top_students, start=1):
        print(f"{rank}. {student.name} - {student.gpa}")


def show_graduated_students(students):
    graduated_students = [
        student for student in students
        if student.get_status() == "Graduated"
    ]

    print("\n= Graduated Students =")

    if not graduated_students:
        print("No graduated students found.")
        return

    for student in graduated_students:
        print(
            f"{student.name} - "
            f"{student.credits} Credits"
        )

def show_menu():
    print("\n===== Student Analysis Menu =====")
    print("1. Show Summary")
    print("2. Search Student")
    print("3. Show Top Students")
    print("4. Show Graduated Students")
    print("5. Exit")

def main():
    students = load_students("students.csv")

    if not students:
        return

    while True:
        show_menu()
        choice = input("\nEnter your choice: ").strip()

        if choice == "1":
            show_summary(students)

        elif choice == "2":
            search_student(students)

        elif choice == "3":
            show_top_students(students)

        elif choice == "4":
            show_graduated_students(students)

        elif choice == "5":
            print("\nProgram closed.")
            break
        else:
            print("\nInvalid choice. Please select 1 to 5.")
if __name__ == "__main__":
    main()