from __future__ import annotations
import os
from app.config import settings
from fastapi import APIRouter, Depends, HTTPException
from api.auth import require_pipeline_guid
from database.connection import connect
from database.retrain_repository import (
    acknowledge_flag, get_database_url, get_pending_flag, resolve_flag
)

router = APIRouter(prefix="/retrain", tags=["retraining"])

def _db():
    value = settings.DATABASE_URL
    if not value:
        raise HTTPException(status_code=500, detail="DATABASE_URL is not configured")
    return value

@router.get("/status")
def retrain_status():
    with connect(_db()) as conn:
        pending = get_pending_flag(conn)
    return {"retrain_required": pending is not None, "flag": pending}

@router.post("/flags/{flag_id}/acknowledge", dependencies=[Depends(require_pipeline_guid)])
def acknowledge(flag_id: int, notes: str | None = None):
    with connect(_db()) as conn:
        updated = acknowledge_flag(conn, flag_id, notes)
    if updated is None:
        raise HTTPException(status_code=404, detail="Pending retrain flag not found")
    return {"status": "acknowledged", "flag_id": updated}

@router.post("/flags/{flag_id}/resolve", dependencies=[Depends(require_pipeline_guid)])
def resolve(flag_id: int, notes: str | None = None):
    with connect(_db()) as conn:
        updated = resolve_flag(conn, flag_id, notes)
    if updated is None:
        raise HTTPException(status_code=404, detail="Open retrain flag not found")
    return {"status": "resolved", "flag_id": updated}