from datetime import date

class Student:
    def __init__(self, sid: str, name: str, height: str, birth_date: date | str, enrollment_date: date | str, class_name: str):
        self.sid = sid
        self.name = name.strip()
        self.height = int(height)  # 转换为整数类型
        self.birth_date = birth_date if isinstance(birth_date, date) else date.fromisoformat(birth_date)
        self.enrollment_date = enrollment_date if isinstance(enrollment_date, date) else date.fromisoformat(enrollment_date)
        self.class_name = class_name
        self._validation_errors = []
        self._validate_height()
        self._validate_date()
        self._validate_name()

    def _validate_height(self) -> None:
        if not (50 <= self.height <= 250):
            self._validation_errors.append(f"身高{self.height}cm超出合理范围")

    def _validate_name(self) -> None:
        if not (2 <= len(self.name) <= 20) or not self.name.isprintable():
            self._validation_errors.append("姓名长度需在2-20个字符之间且为可打印字符")
        if not self.name.isprintable():
            self._validation_errors.append("姓名长度需在2-20个字符之间")

    def _validate_date(self) -> None:
        today = date.today()
        if self.birth_date > today:
            self._validation_errors.append('出生日期不能在未来')
        if self.enrollment_date > today:
            self._validation_errors.append('入学日期不能在未来')
        if self.birth_date > self.enrollment_date:
            self._validation_errors.append('入学日期不能早于出生日期')

    @property
    def is_valid(self) -> bool:
        return len(self._validation_errors) == 0

    def get_errors(self) -> list[str]:
        return self._validation_errors.copy()

    def __eq__(self, other) -> bool:
        if not isinstance(other, Student):
            return NotImplemented
        return (self.sid == other.sid and
                self.name == other.name and
                self.height == other.height and
                self.birth_date == other.birth_date and
                self.enrollment_date == other.enrollment_date and
                self.class_name == other.class_name
                )

    @classmethod
    def from_dict(cls, data: dict) -> 'Student':
        birth_date = data['birth_date'] if isinstance(data['birth_date'], date) else date.fromisoformat(
            data['birth_date'])
        enrollment_date = data['enrollment_date'] if isinstance(data['enrollment_date'], date) else date.fromisoformat(
            data['enrollment_date'])
        return cls(
            sid=data['sid'],
            name=data['name'].strip(),
            height=data['height'],
            birth_date=birth_date,
            enrollment_date=enrollment_date,
            class_name=data['class_name']
        )

    def to_dict(self):
        return {
                'sid': self.sid,
                'name': self.name,
                'height': self.height,
                'birth_date': self.birth_date.isoformat(),
                'enrollment_date': self.enrollment_date.isoformat(),
                'class_name': self.class_name
            }

    def __repr__(self) -> str:
        return (
            f"{self.__class__.__name__}("
            f"sid='{self.sid}', "
            f"name='{self.name}',"
            f"height={self.height},"
            f"birth_date=date({self.birth_date.year},{self.birth_date.month},{self.birth_date.day}), "
            f"enrollment_date=date({self.enrollment_date.year},{self.enrollment_date.month},{self.enrollment_date.day}), "
            f"class_name='{self.class_name}'"
            f")"
        )