"""Use-case registry: lookup, unknown-name error, first use case wired."""

from __future__ import annotations

import pytest
from pydantic import BaseModel

from ix.errors import IXErrorCode, IXException
from ix.use_cases import REGISTRY, get_use_case
from ix.use_cases.bank_statement_header import BankStatementHeader, Request


def test_registry_has_bank_statement_header() -> None:
    entry = REGISTRY["bank_statement_header"]
    assert entry == (Request, BankStatementHeader)


def test_registry_entry_types_are_basemodel_subclasses() -> None:
    req_cls, resp_cls = REGISTRY["bank_statement_header"]
    assert issubclass(req_cls, BaseModel)
    assert issubclass(resp_cls, BaseModel)


def test_get_use_case_returns_tuple() -> None:
    req_cls, resp_cls = get_use_case("bank_statement_header")
    assert req_cls is Request
    assert resp_cls is BankStatementHeader


def test_get_use_case_unknown_name_raises_ix_001_001() -> None:
    with pytest.raises(IXException) as exc_info:
        get_use_case("no_such_use_case")
    assert exc_info.value.code is IXErrorCode.IX_001_001
    # The detail should include the bad name so logs aren't ambiguous.
    assert "no_such_use_case" in (exc_info.value.detail or "")