from __future__ import annotations

from datetime import datetime
from typing import Optional

from sqlalchemy import DateTime, String, UniqueConstraint, text
from sqlalchemy.dialects.mysql import BIGINT, INTEGER, TINYINT
from sqlalchemy.orm import Mapped, mapped_column, relationship

from backend.db.base import Base


class Customer(Base):
    __tablename__ = "customers"
    __table_args__ = (UniqueConstraint("name", name="uniq_customer_name"),)

    id: Mapped[int] = mapped_column(BIGINT(unsigned=True), primary_key=True, autoincrement=True)
    name: Mapped[str] = mapped_column(String(128), nullable=False)
    contact_email: Mapped[Optional[str]] = mapped_column(String(128))
    is_active: Mapped[int] = mapped_column(TINYINT(1), nullable=False, server_default=text("1"))
    quota_instances: Mapped[Optional[int]] = mapped_column(INTEGER(unsigned=True))
    notes: Mapped[Optional[str]] = mapped_column(String(255))
    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=text("CURRENT_TIMESTAMP"), nullable=False)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=text("CURRENT_TIMESTAMP"), onupdate=text("CURRENT_TIMESTAMP"), nullable=False
    )

    users: Mapped[list["User"]] = relationship("User", back_populates="customer")