"""Notification database model for in-app notifications."""

import json
import uuid
from sqlalchemy import Column, String, Boolean, ForeignKey, Text
from sqlalchemy.sql import func
from sqlalchemy.types import DateTime

from app.db.base import Base


class Notification(Base):
    """Notification model for in-app user notifications."""

    __tablename__ = "notifications"

    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))

    # Recipient
    user_id = Column(String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)

    # Notification content
    title = Column(String(200), nullable=False)
    message = Column(Text, nullable=True)
    type = Column(String(50), default="info")  # info, success, warning, error, system

    # Link (optional) - where to navigate when clicked
    link = Column(String(500), nullable=True)

    # Extra data (JSON string)
    extra_data = Column(Text, nullable=True)

    # Status
    is_read = Column(Boolean, default=False, nullable=False, index=True)

    # Timestamps
    created_at = Column(DateTime, server_default=func.now(), nullable=False, index=True)
    read_at = Column(DateTime, nullable=True)

    @property
    def parsed_extra_data(self) -> dict | None:
        """Get extra_data as parsed dict."""
        if self.extra_data:
            try:
                return json.loads(self.extra_data)
            except json.JSONDecodeError:
                return None
        return None

    def __repr__(self):
        return f"<Notification(id={self.id}, user_id={self.user_id}, title='{self.title[:30]}')>"