"""CSE reference constants and geography resolution.

CSE identifies geography, cargo type and currency by GUID. Geography GUIDs per
city live in ``cities_map`` under the ``cse`` block (see task 037). Cargo-type
GUIDs come from ``GetReferenceData: TypesOfCargo`` and must be configured with
real values before production use.
"""

from app.adapters.delivery_providers.cse.errors import CSERequestError
from app.cities import cities_map

# Provider name surfaced in unified DeliveryPrice/SystemDataTariff.
CSE_PROVIDER_NAME = "cse"

# Keywords in a DeliveryType name/label that imply a pickup point (PVZ) is
# required at registration (SenderPVZ/RecipientPVZ). PVZ is not yet supported,
# so such schemes are excluded from price calculation.
_PVZ_SCHEME_KEYWORDS = ("склад", "самовывоз", "почтов", "пвз")


def delivery_type_requires_pvz(name: str, label: str) -> bool:
    haystack = f"{name} {label}".lower()
    return any(keyword in haystack for keyword in _PVZ_SCHEME_KEYWORDS)

# CSE returns currency short names (e.g. "RUR"); normalize to ISO-4217.
_CURRENCY_NAME_TO_CODE = {
    "RUR": "RUB",
    "RUB": "RUB",
    "USD": "USD",
    "EUR": "EUR",
}

# TypeOfCargo GUIDs by parcel type (GetReferenceData: TypesOfCargo).
TYPE_OF_CARGO_BY_PARCEL_TYPE: dict[str, str] = {
    "doc": "81dd8a13-8235-494f-84fd-9c04c51d50ec",  # Документы
    "parcel": "4aab1fc6-fc2b-473a-8728-58bcd4ff79ba",  # Груз
}

# Cargo type used when the parcel type is not known (price calculation flow).
DEFAULT_TYPE_OF_CARGO: str = "4aab1fc6-fc2b-473a-8728-58bcd4ff79ba"  # Груз


def normalize_currency(currency_name: str | None) -> str:
    if not currency_name:
        return "RUB"
    return _CURRENCY_NAME_TO_CODE.get(currency_name.strip().upper(), "RUB")


def resolve_type_of_cargo(parcel_type: str | None) -> str:
    cargo_guid = (
        TYPE_OF_CARGO_BY_PARCEL_TYPE.get(parcel_type)
        if parcel_type is not None
        else DEFAULT_TYPE_OF_CARGO
    )
    if not cargo_guid:
        raise CSERequestError(
            f"CSE cargo type is not configured for parcel type {parcel_type!r}."
        )
    return cargo_guid


def resolve_cse_geography(city_id: int) -> str:
    """Resolve CSE geography GUID from cities_map by city identifier."""

    city_entry = cities_map.get(str(city_id))
    if not isinstance(city_entry, dict):
        raise CSERequestError(
            f"CSE geography is not configured for city id {city_id}."
        )

    cse_data = city_entry.get("cse")
    if not isinstance(cse_data, dict):
        raise CSERequestError(
            f"CSE geography is not configured for city id {city_id}."
        )

    geography_uid = cse_data.get("geography_uid")
    if not isinstance(geography_uid, str) or not geography_uid:
        raise CSERequestError(
            f"CSE geography is not configured for city id {city_id}."
        )
    return geography_uid