"""Реальный клиент Nova Poshta (`TrackingDocument.getStatusDocuments`)."""

from __future__ import annotations

import httpx

from app.core.config import Settings
from app.schemas.tracking import TrackingStatusOut
from app.services.nova_poshta.client import NovaPoshtaError

_API_URL = "https://api.novaposhta.ua/v2.0/json/"

# NP отклоняет запросы с более чем 100 накладными за раз.
_MAX_DOCUMENTS_PER_REQUEST = 100


class NpTrackingClient:
    def __init__(self, settings: Settings) -> None:
        self._api_key = settings.nova_poshta_api_key

    async def get_statuses(self, *, waybill_numbers: list[str]) -> list[TrackingStatusOut]:
        if not waybill_numbers:
            return []
        if len(waybill_numbers) > _MAX_DOCUMENTS_PER_REQUEST:
            raise NovaPoshtaError(
                f"Слишком много ТТН за один запрос: {len(waybill_numbers)} "
                f"(максимум {_MAX_DOCUMENTS_PER_REQUEST})"
            )

        body = {
            "apiKey": self._api_key,
            "modelName": "TrackingDocument",
            "calledMethod": "getStatusDocuments",
            "methodProperties": {
                "Documents": [{"DocumentNumber": number, "Phone": ""} for number in waybill_numbers]
            },
        }

        async with httpx.AsyncClient(timeout=30) as client:
            response = await client.post(_API_URL, json=body)
            response.raise_for_status()
            data = response.json()

        if not data.get("success"):
            errors = data.get("errors") or []
            message = "; ".join(str(error) for error in errors)
            raise NovaPoshtaError(f"NP вернул ошибку: {message or 'неизвестная ошибка'}")

        return [TrackingStatusOut.model_validate(item) for item in data.get("data", [])]