from __future__ import annotations

import pytest
from pydantic import ValidationError

from enterprise_finance_env.models import ApplyForexAdjustment, EnterpriseFinanceActionPayload, QuerySubledger


def test_query_subledger_rejects_inverted_date_range() -> None:
    with pytest.raises(ValidationError):
        QuerySubledger(
            entity="PARENT_US",
            account_code="IC_AR",
            date_range=("2026-03-02", "2026-03-01"),
        )


def test_apply_forex_adjustment_requires_positive_rate() -> None:
    with pytest.raises(ValidationError):
        ApplyForexAdjustment(txn_id="MED001", exchange_rate=0, date="2026-02-05")


def test_action_union_parses_link_action() -> None:
    payload = EnterpriseFinanceActionPayload.model_validate(
        {
            "type": "link_transactions",
            "debit_txn_id": "TXN_DEBIT",
            "credit_txn_id": "TXN_CREDIT",
            "rationale": "Amounts and counterparties align.",
        }
    )
    assert payload.root.type == "link_transactions"