"""
===============================================================================
FILE: modules/web_api/routers/snapshots.py
ROLE: REST API эндпоинты для управления и моментального создания срезов СКУД.
===============================================================================
"""

from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel
from typing import Optional, List, Dict, Any

from routers.auth import get_current_user
from services.snapshots.service import get_snapshots_registry, delete_snapshots_safely
from services.scud_export import run_export

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


class CreateSnapshotRequest(BaseModel):
    date_str: Optional[str] = None


class DeleteSnapshotsRequest(BaseModel):
    snapshot_ids: List[str]


@router.get("")
def api_get_snapshots(date_str: Optional[str] = None, current_user = Depends(get_current_user)):
    return get_snapshots_registry(date_str=date_str)


@router.post("/create")
def api_create_instant_snapshot(req: CreateSnapshotRequest, current_user = Depends(get_current_user)):
    """Моментальный опрос MS SQL СКУД и запись свежего среза в SQLite."""
    try:
        success = run_export(input_date=req.date_str, save_xlsx=True, debug=False)
        if not success:
            raise HTTPException(status_code=500, detail="Ошибка при обращении к MS SQL Орион")
        
        fresh_data = get_snapshots_registry(date_str=req.date_str)
        return {"status": "success", "message": "Срез успешно создан", "data": fresh_data}
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Ошибка создания среза: {str(e)}")


@router.delete("")
def api_delete_snapshots(req: DeleteSnapshotsRequest, current_user = Depends(get_current_user)):
    safe_ids = [s for s in req.snapshot_ids if not str(s).startswith("Y")]
    if not safe_ids:
        raise HTTPException(status_code=400, detail="Итоговый Y-срез защищен от удаления")
    
    res = delete_snapshots_safely(snapshot_ids=safe_ids)
    return {"status": "success", "deleted_count": res.get("deleted_count", len(safe_ids))}