from __future__ import annotations

import uuid
from enum import Enum

from sqlalchemy import Integer, String
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from core.db.base import Base, TimestampMixin


class SubscriptionStatus(str, Enum):
    ACTIVE = "active"
    PAUSED = "paused"
    UNSUBSCRIBED = "unsubscribed"


class NotifyLevel(str, Enum):
    ALL = "all"
    MENTIONS = "mentions"
    NONE = "none"


class ScheduleSubscription(TimestampMixin, Base):
    __tablename__: str = "schedule_subscriptions"
    __table_args__ = {"extend_existing": True}

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    item_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        nullable=False,
    )
    subscriber_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        nullable=False,
    )
    permission: Mapped[int] = mapped_column(
        Integer,
        nullable=False,
        default=1,
    )
    notify_level: Mapped[NotifyLevel] = mapped_column(
        String(20),
        nullable=False,
        default=NotifyLevel.ALL,
    )
    status: Mapped[SubscriptionStatus] = mapped_column(
        String(20),
        nullable=False,
        default=SubscriptionStatus.ACTIVE,
    )
    created_by: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        nullable=True,
    )