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()

از Day 1 تا Day 17 چیا یادگرفنیم؟!
✅ Variables
✅ Conditions
✅ Loops
✅ Functions
✅ Lists & Dictionaries
✅ File Handling
✅ CSV
✅ Error Handling
✅ OOP
✅ NumPy
✅ Pandas

🚀 چالش این هفته:
با استفاده از آموخته‌های Day 1 تا Day 17، نسخه خودتان از این پروژه را بسازید.
لازم نیست طراحی شما دقیقاً شبیه ویدیو باشد.
نسخه ساده، ناقص یا در حال توسعه هم پذیرفته می‌شود؛ مهم این است که شروع کنید و دانسته‌هایتان را به یک خروجی واقعی تبدیل کنید.

🟢 حداقل امکانات پیشنهادی:
• خواندن اطلاعات از CSV
• نمایش آمار کلی دانشجویان
• جست‌وجوی دانشجو
• شناسایی دانشجوی برتر
• نمایش وضعیت تحصیلی
• حداقل یک نمودار تحلیلی

🔴 چالش Pro:
• ساخت رابط کاربری با Streamlit
• اضافه‌کردن فیلتر و نمودارهای تعاملی
• شناسایی دانشجویان At Risk
• امکان دانلود گزارش
• انتشار پروژه در GitHub