from fastapi import APIRouter, Depends, HTTPException, Query, Request
from sqlalchemy.orm import Session

from app.db import get_db
from app.schemas import ItemCreate, ItemOut, WallResponse
from app.services import items as items_service

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


def _client_ip(request: Request) -> str:
    forwarded = request.headers.get("x-forwarded-for")
    if forwarded:
        return forwarded.split(",")[0].strip()
    if request.client and request.client.host:
        return request.client.host
    return ""


@router.post("", response_model=ItemOut)
def create_item(
    payload: ItemCreate,
    request: Request,
    db: Session = Depends(get_db),
):
    item = items_service.create_text_item(db, payload, _client_ip(request))
    return items_service.item_to_dict(item)


@router.get("/wall", response_model=WallResponse)
def wall(
    page: int = Query(1, ge=1),
    page_size: int = Query(20, ge=1, le=100),
    db: Session = Depends(get_db),
):
    rows, total = items_service.list_wall(db, page=page, page_size=page_size)
    return WallResponse(
        items=[ItemOut.model_validate(items_service.item_to_dict(i)) for i in rows],
        page=page,
        page_size=page_size,
        total=total,
    )


@router.get("/{slug}", response_model=ItemOut)
def get_item(slug: str, db: Session = Depends(get_db)):
    item = items_service.get_item(db, slug)
    if item is None:
        raise HTTPException(status_code=404, detail="Not found")
    return items_service.item_to_dict(item)