from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import Boolean, DateTime, ForeignKey, Index, UniqueConstraint, func
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from app.db.base_class import Base


class DesktopNotificationSubscription(Base):
    __tablename__ = "desktop_notification_subscriptions"

    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), primary_key=True
    )
    enabled: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False, server_default="false")
    enabled_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())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now(), onupdate=func.now()
    )


class DesktopNotificationDelivery(Base):
    __tablename__ = "desktop_notification_deliveries"
    __table_args__ = (
        UniqueConstraint("user_id", "distribution_id", name="uq_desktop_notification_user_distribution"),
        Index("ix_desktop_notification_claim", "user_id", "delivered_at", "claimed_at"),
    )

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False
    )
    distribution_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("distributions.id", ondelete="CASCADE"), nullable=False
    )
    claim_token: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), nullable=True)
    claimed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    delivered_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    read_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)