class User(Base, TimestampMixin):
    __tablename__ = "users"
    id = Column(Integer, primary_key=True)
    email = Column(String(320), unique=True, nullable=False, index=True)
    password_hash = Column(String(255), nullable=False)
    full_name = Column(String(200), default="")
    is_admin = Column(Boolean, default=False, nullable=False)
    is_active = Column(Boolean, default=True, nullable=False)
    last_login_at = Column(DateTime(timezone=True))

    gmail_accounts = relationship("GmailAccount", back_populates="user", cascade="all, delete-orphan")
    audit_logs = relationship("AuditLog", back_populates="user")


class OAuthClientConfig(Base, TimestampMixin):
    """An imported Google OAuth client configuration (from client_secret JSON).
    Secrets stored encrypted. Multiple configs may exist (e.g. per project)."""
    __tablename__ = "oauth_client_configs"
    id = Column(Integer, primary_key=True)
    name = Column(String(200), nullable=False)
    client_id = Column(String(300), nullable=False)
    client_secret_enc = Column(String(600), nullable=False)  # encrypted
    redirect_uri = Column(String(500), default="")
===
class Recipient(Base, TimestampMixin):
    __tablename__ = "recipients"
    id = Column(Integer, primary_key=True)
    list_id = Column(Integer, ForeignKey("recipient_lists.id", ondelete="CASCADE"), nullable=False, index=True)
    email = Column(String(320), nullable=False, index=True)
    first_name = Column(String(150), default="")
    last_name = Column(String(150), default="")
    company_name = Column(String(250), default="")
    company_phone = Column(String(60), default="")
    customer_email = Column(String(320), default="")
    custom_fields = Column(JSON, default=dict)
    # validation / status
    status = Column(String(30), default="valid")  # valid|invalid|duplicate|suppressed|bounced
    validation_error = Column(Text, default="")
    is_valid = Column(Boolean, default=True, nullable=False)
    # unsubscribe token (unique secret per recipient)
    unsub_token = Column(String(64), unique=True, nullable=False)

    list = relationship("RecipientList", back_populates="recipients")

    __table_args__ = (Index("ix_recipient_list_email", "list_id", "email"),)
===
class CompanyPhoneNumber(Base, TimestampMixin):
    __tablename__ = "company_phone_numbers"
    id = Column(Integer, primary_key=True)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
    label = Column(String(150), default="")
    phone = Column(String(60), nullable=False)
    is_active = Column(Boolean, default=True, nullable=False)
    use_count = Column(Integer, default=0)


class SendJob(Base, TimestampMixin):
    __tablename__ = "send_jobs"
    id = Column(Integer, primary_key=True)
    campaign_id = Column(Integer, ForeignKey("campaigns.id", ondelete="CASCADE"), nullable=False, index=True)
    campaign_recipient_id = Column(Integer, ForeignKey("campaign_recipients.id", ondelete="CASCADE"), nullable=False, index=True)