from __future__ import annotations

from datetime import datetime
from uuid import uuid4

from sqlalchemy import DateTime, MetaData, func
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column

convention = {
    "ix": "ix_%(column_0_label)s",
    "uq": "uq_%(table_name)s_%(column_0_name)s",
    "ck": "ck_%(table_name)s_%(constraint_name)s",
    "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s",
    "pk": "pk_%(table_name)s",
}


class Base(DeclarativeBase):
    metadata = MetaData(naming_convention=convention)


class UUIDMixin:
    id: Mapped[str] = mapped_column(primary_key=True, default=lambda: str(uuid4()))


class TimestampMixin:
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
    )