"""
验证码领域实体
"""

from dataclasses import dataclass, field
from datetime import datetime, timedelta, timezone
from uuid import uuid4


@dataclass(slots=True)
class VerificationCode:
    """验证码（邮箱/手机统一）"""

    id: str
    recipient: str  # 邮箱或手机号
    code: str
    code_type: str  # email_bind / phone_bind / email_login / phone_login / reset_password
    expires_at: datetime
    used_at: datetime | None = None
    attempts: int = 0
    created_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))

    @classmethod
    def create(
        cls,
        recipient: str,
        code_type: str,
        ttl_seconds: int = 300,
        custom_code: str | None = None,
    ) -> "VerificationCode":
        """创建验证码"""
        import random

        code = custom_code or "".join(random.choices("0123456789", k=6))
        now = datetime.now(timezone.utc)
        return cls(
            id=uuid4().hex,
            recipient=recipient.strip(),
            code=code,
            code_type=code_type,
            expires_at=now + timedelta(seconds=ttl_seconds),
            created_at=now,
        )

    @property
    def is_expired(self) -> bool:
        """是否已过期"""
        return datetime.now(timezone.utc) > self.expires_at

    @property
    def is_used(self) -> bool:
        """是否已使用"""
        return self.used_at is not None

    @property
    def is_valid(self) -> bool:
        """是否有效（未过期且未使用）"""
        return not self.is_expired and not self.is_used

    def mark_used(self) -> None:
        """标记为已使用"""
        self.used_at = datetime.now(timezone.utc)

    def increment_attempts(self) -> None:
        """增加尝试次数"""
        self.attempts += 1