"""Notification routes."""

from __future__ import annotations

import uuid

from fastapi import APIRouter, Depends, HTTPException, Query, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.db import get_db
from app.core.notifications import (
    get_unread_count, list_notifications, mark_notification_read,
)
from app.deps import get_current_user

router = APIRouter(prefix="/api/v1/notifications", tags=["notifications"])


@router.get("")
async def list_notifications_endpoint(
    page: int = Query(1, ge=1),
    page_size: int = Query(25, ge=1, le=100),
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """List notifications (unread first)."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    user_id = uuid.UUID(current_user["user_id"])
    return await list_notifications(db, tenant_id, user_id, page, page_size)


@router.patch("/{notification_id}/read")
async def mark_notification_read_endpoint(
    notification_id: str,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """Mark a notification as read."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    user_id = uuid.UUID(current_user["user_id"])
    try:
        nid = uuid.UUID(notification_id)
    except ValueError:
        raise HTTPException(400, detail={"detail": "Invalid notification_id", "code": "invalid_id"})

    notif = await mark_notification_read(db, tenant_id, user_id, nid)
    if notif is None:
        raise HTTPException(404, detail={"detail": "Notification not found", "code": "not_found"})

    return {
        "id": str(notif.id),
        "type": notif.type,
        "title": notif.title,
        "body": notif.body,
        "read_at": notif.read_at.isoformat() if notif.read_at else None,
        "created_at": notif.created_at.isoformat() if notif.created_at else None,
    }


@router.get("/unread-count")
async def unread_count_endpoint(
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """Get unread notification count."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    user_id = uuid.UUID(current_user["user_id"])
    count = await get_unread_count(db, tenant_id, user_id)
    return {"count": count}