"""Admin endpoints для ETL operations (#203).

POST /api/v1/admin/etl/objective-backfill
    Запустить fuzzy-match backfill objective_complex_mapping.
    Опциональный REFRESH mv_layout_velocity после успешного backfill.

POST /api/v1/admin/etl/nspd-denorm-backfill
    Запустить backfill nspd_parcels/nspd_buildings из всех nspd_quarter_dumps.

Header: X-Admin-Token: <SCRAPE_ADMIN_TOKEN>
"""

from __future__ import annotations

import logging
from typing import Annotated

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

from app.core.db import get_db
from app.core.deps import AdminTokenAuth
from app.services.etl.objective_backfill import (
    REVIEW_THRESHOLD,
    auto_apply_matches,
    find_match_candidates,
    trigger_mv_refresh,
)

logger = logging.getLogger(__name__)
router = APIRouter()


@router.post("/objective-backfill")
def run_objective_backfill(
    db: Annotated[Session, Depends(get_db)],
    _: AdminTokenAuth,
    dry_run: Annotated[bool, Query(description="Preview без insertions")] = False,
    refresh_mv: Annotated[
        bool, Query(description="REFRESH mv_layout_velocity после backfill")
    ] = True,
) -> dict[str, int]:
    """Запустить backfill objective_complex_mapping + опционально REFRESH MV.

    Ищет DOM.РФ комплексы (is_ekb=true) без mapping и применяет fuzzy match
    к project_name из objective_corpus_room_month через pg_trgm similarity.

    - score >= 0.85 (AUTO_ACCEPT_THRESHOLD): auto-insert с match_method='fuzzy_trgm'
    - score >= 0.6 (REVIEW_THRESHOLD) и < 0.85: только в счётчик review_queue
      (Phase 2 — UI для ручного review)

    Returns dict:
        auto_accepted: сколько строк вставлено
        review_queue: сколько кандидатов ниже порога auto-accept
        skipped: ON CONFLICT + ошибки
        mv_rows_after_refresh: строк в MV после REFRESH (0 если refresh_mv=False)
    """
    candidates = find_match_candidates(db, only_unmapped=True)
    logger.info(
        "Backfill candidates found: %d (score >= %.2f)",
        len(candidates),
        REVIEW_THRESHOLD,
    )

    result = auto_apply_matches(db, candidates, dry_run=dry_run)

    mv_rows = 0
    if refresh_mv and not dry_run and result["auto_accepted"] > 0:
        mv_rows = trigger_mv_refresh(db)
        logger.info("mv_layout_velocity refreshed after backfill: %d rows", mv_rows)

    result["mv_rows_after_refresh"] = mv_rows
    return result


@router.post("/nspd-denorm-backfill")
def run_nspd_denorm_backfill(
    _: AdminTokenAuth,
    limit: Annotated[
        int | None,
        Query(description="Максимум кварталов для обработки (None = все)"),
    ] = None,
) -> dict[str, object]:
    """Запустить Celery backfill: denormalize nspd_quarter_dumps → nspd_parcels/nspd_buildings.

    Задача идемпотентна (ON CONFLICT DO UPDATE). Безопасно запускать повторно.
    Возвращает Celery task_id — статус через /flower или celery inspect.

    Args:
        limit: если задан — обработать только первые N кварталов ORDER BY quarter_cad.
    """
    from app.workers.tasks.nspd_denorm_backfill import backfill_all_dumps

    task = backfill_all_dumps.apply_async(kwargs={"limit": limit})
    logger.info("nspd-denorm-backfill enqueued: task_id=%s limit=%s", task.id, limit)
    return {"task_id": task.id, "status": "enqueued", "limit": limit}