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

from app.database import get_db
from app.schemas.announcement import AnnouncementDetailResponse, AnnouncementListItem
from app.services.announcement_service import get_announcement_by_id, list_announcements

router = APIRouter()


@router.get("")
async def get_announcements(
    page: int = Query(default=1, ge=1),
    page_size: int = Query(default=10, ge=1, le=50),
    session: AsyncSession = Depends(get_db),
) -> dict:
    items = await list_announcements(session, published_only=True)
    start = (page - 1) * page_size
    end = start + page_size
    data = [
        AnnouncementListItem(
            id=item.id,
            title=item.title,
            is_pinned=item.is_pinned,
            is_published=item.is_published,
            created_at=item.created_at.isoformat() if item.created_at else None,
        ).model_dump()
        for item in items[start:end]
    ]
    return {"code": 0, "message": "ok", "data": data}


@router.get("/{announcement_id}")
async def get_announcement(
    announcement_id: int,
    session: AsyncSession = Depends(get_db),
) -> dict:
    item = await get_announcement_by_id(session, announcement_id)
    if item is None or item.is_published != 1:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Announcement not found")

    data = AnnouncementDetailResponse(
        id=item.id,
        title=item.title,
        content=item.content,
        is_pinned=item.is_pinned,
        is_published=item.is_published,
        created_at=item.created_at.isoformat() if item.created_at else None,
    ).model_dump()
    return {"code": 0, "message": "ok", "data": data}