"""Announcements — super admin creates, all users read."""
from datetime import datetime, timezone
from typing import Optional
from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, desc, and_

from app.auth.dependencies import require_super_admin, get_current_user
from app.database import get_db
from app.models.user import HubUser
from app.models.announcement import Announcement

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

class AnnouncementCreate(BaseModel):
    title: str
    body: str
    expires_at: Optional[datetime] = None

@router.get("")
async def list_announcements(
    current_user: HubUser = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    stmt = select(Announcement).where(
        and_(Announcement.is_active == True,
             (Announcement.expires_at == None) | (Announcement.expires_at > datetime.now(timezone.utc)))
    ).order_by(desc(Announcement.created_at)).limit(10)
    items = (await db.execute(stmt)).scalars().all()
    return [{"id": a.id, "title": a.title, "body": a.body, "created_at": a.created_at.isoformat()} for a in items]

@router.post("", status_code=201)
async def create_announcement(
    body: AnnouncementCreate,
    admin: HubUser = Depends(require_super_admin),
    db: AsyncSession = Depends(get_db),
):
    ann = Announcement(title=body.title, body=body.body, created_by=admin.id, expires_at=body.expires_at)
    db.add(ann)
    await db.commit()
    return {"id": ann.id, "title": ann.title, "created_at": ann.created_at.isoformat()}

@router.delete("/{ann_id}", status_code=204)
async def delete_announcement(
    ann_id: str,
    _admin: HubUser = Depends(require_super_admin),
    db: AsyncSession = Depends(get_db),
):
    ann = (await db.execute(select(Announcement).where(Announcement.id == ann_id))).scalar_one_or_none()
    if not ann:
        raise HTTPException(404)
    ann.is_active = False
    await db.commit()