"""Модель токена подтверждения email пользователя."""

import uuid
from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, Index, Text, func, text
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from models.base import Base


class EmailVerificationToken(Base):
    """Одноразовый токен подтверждения email; хранится только sha256-хэш токена."""

    __tablename__ = "email_verification_tokens"
    __table_args__ = (Index("ix_email_verification_tokens_user_id", "user_id"),)

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, server_default=text("gen_random_uuid()")
    )
    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False
    )
    token_hash: Mapped[str] = mapped_column(Text, nullable=False, unique=True)
    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    used_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )