import uuid
from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, String, Text
from sqlalchemy.dialects.postgresql import JSONB, UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


class Notification(Base):
    __tablename__ = "notifications"

    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    title: Mapped[str] = mapped_column(String(255), nullable=False)
    body: Mapped[str] = mapped_column(Text, nullable=False)
    type: Mapped[str] = mapped_column(String(30), nullable=False, default="info")
    channel: Mapped[str] = mapped_column(String(20), nullable=False, default="in_app")
    status: Mapped[str] = mapped_column(String(20), nullable=False, default="pending")
    scheduled_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    sent_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    read_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    metadata_: Mapped[dict | None] = mapped_column("metadata", JSONB, nullable=True)

    user: Mapped["User"] = relationship(back_populates="notifications")  # noqa: F821