# Роуты запуска задач синхронизации и просмотра истории sync-runs.

from fastapi import APIRouter, Depends, Query
from pydantic import BaseModel, field_validator
from sqlalchemy import select, func

from ..deps import get_persistence
from ...storage.db import PersistenceService
from ...storage.models import SyncRun
from ...worker.celery_app import celery_app
from ...worker.tasks import sync_vehicle_task, sync_listing_task

router = APIRouter()


class SyncVehicleRequest(BaseModel):
    vehicle_url: str
    lane: str = "iaai"

    @field_validator("vehicle_url")
    @classmethod
    def validate_vehicle_url(cls, value: str) -> str:
        cleaned = (value or "").strip()
        if not cleaned:
            raise ValueError("vehicle_url must not be empty")
        return cleaned

    @field_validator("lane")
    @classmethod
    def validate_vehicle_lane(cls, value: str) -> str:
        cleaned = (value or "").strip()
        if not cleaned:
            return "iaai"
        return cleaned


class SyncListingRequest(BaseModel):
    make: str | None = None
    model: str | None = None
    lane: str = "iaai_cars"
    limit: int | None = None
    only_new: bool | None = None

    @field_validator("make", "model", mode="before")
    @classmethod
    def normalize_optional_filters(cls, value: str | None):
        if value is None:
            return None
        cleaned = str(value).strip()
        return cleaned or None

    @field_validator("lane")
    @classmethod
    def validate_listing_lane(cls, value: str) -> str:
        cleaned = (value or "").strip()
        if not cleaned:
            return "iaai_cars"
        return cleaned


@router.post("/tasks/sync-vehicle")
def start_sync_vehicle(
    body: SyncVehicleRequest,
):
    # Запустить задачу скрапинга одного автомобиля через Celery
    result = sync_vehicle_task.apply_async(
        kwargs={"vehicle_url": body.vehicle_url, "lane": body.lane},
        queue="scraping",
    )

    return {
        "task_id": result.id,
        "status": "queued",
        "vehicle_url": body.vehicle_url,
    }


@router.post("/tasks/sync-listing")
def start_sync_listing(
    body: SyncListingRequest,
):
    # Запустить задачу полного цикла листинга через Celery
    result = sync_listing_task.apply_async(
        kwargs={
            "make": body.make,
            "model": body.model,
            "lane": body.lane,
            "limit": body.limit,
            "only_new": body.only_new,
        },
        queue="scraping",
    )

    return {
        "task_id": result.id,
        "status": "queued",
    }


@router.get("/tasks/{task_id}")
def get_task_status(task_id: str):
    result = celery_app.AsyncResult(task_id)

    payload: dict = {
        "task_id": task_id,
        "state": result.state,
    }

    if result.successful():
        payload["result"] = result.result
    elif result.failed():
        payload["error"] = str(result.result)
    elif result.info is not None:
        payload["meta"] = result.info

    return payload


@router.get("/sync-runs")
def list_sync_runs(
    page: int = Query(1, ge=1),
    per_page: int = Query(20, ge=1, le=100),
    persistence: PersistenceService = Depends(get_persistence),
):
    # История запусков синхронизации
    with persistence.session_scope() as session:
        total = session.execute(select(func.count(SyncRun.id))).scalar() or 0
        offset = (page - 1) * per_page
        runs = session.execute(
            select(SyncRun).order_by(SyncRun.started_at.desc()).offset(offset).limit(per_page)
        ).scalars().all()

        return {
            "total": total,
            "page": page,
            "per_page": per_page,
            "items": [
                {
                    "id": r.id,
                    "started_at": r.started_at.isoformat() if r.started_at else None,
                    "finished_at": r.finished_at.isoformat() if r.finished_at else None,
                    "status": r.status,
                    "lane": r.lane,
                    "ids_fetched": r.ids_fetched,
                    "cars_upserted": r.cars_upserted,
                    "cars_failed": r.cars_failed,
                    "images_upserted": r.images_upserted,
                    "error_summary": r.error_summary,
                }
                for r in runs
            ],
        }