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

from ..database import get_db
from ..schemas import EventRead
from ..services.filtering import apply_consumer_filter, find_consumer_by_api_key

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


def get_consumer_from_api_key(
    authorization: str | None = Header(default=None),
    db: Session = Depends(get_db),
):
    if not authorization or not authorization.startswith("Bearer "):
        raise HTTPException(status_code=401, detail="Missing or invalid Authorization header")

    api_key = authorization.removeprefix("Bearer ").strip()
    consumer = find_consumer_by_api_key(db, api_key)
    if not consumer:
        raise HTTPException(status_code=401, detail="Invalid API key")
    return consumer


@router.get("/events", response_model=list[EventRead])
def list_filtered_events(
    limit: int = Query(default=100, ge=1, le=1000),
    offset: int = Query(default=0, ge=0),
    consumer=Depends(get_consumer_from_api_key),
    db: Session = Depends(get_db),
):
    events = apply_consumer_filter(db, consumer)
    return events[offset : offset + limit]