from __future__ import annotations

from datetime import date
from decimal import Decimal

from fints.models import SEPAAccount
from mousehold_agent.fints_connector import transaction_to_observation


class DummyTransaction:
    def __init__(self, data: dict[str, object]) -> None:
        self.data = data


def test_fints_debit_transaction_becomes_expense_observation() -> None:
    observation = transaction_to_observation(
        DummyTransaction(
            {
                "date": date(2026, 6, 1),
                "amount": Decimal("-42.50"),
                "currency": "EUR",
                "applicant_name": "REWE",
                "purpose": "Kartenzahlung",
                "customer_reference": "abc-123",
            }
        ),
        account=SEPAAccount("DE001234", "TESTBIC", "1234", None, "43060967"),
        household_id="household-1",
        source_account_id="account-1",
        owner_user_id="user-1",
    )

    assert observation["source_type"] == "fints"
    assert observation["event_type"] == "expense"
    assert observation["amount"] == "42.50"
    assert observation["provider_transaction_id"] == "abc-123"
    assert observation["event_date"] == "2026-06-01"


def test_fints_credit_transaction_becomes_income_observation() -> None:
    observation = transaction_to_observation(
        DummyTransaction(
            {
                "date": date(2026, 6, 2),
                "amount": Decimal("100.00"),
                "currency": "EUR",
                "applicant_name": "Employer",
                "purpose": "Salary",
            }
        ),
        account=SEPAAccount("DE001234", "TESTBIC", "1234", None, "43060967"),
        household_id="household-1",
        source_account_id="account-1",
        owner_user_id="user-1",
    )

    assert observation["event_type"] == "income"
    assert observation["amount"] == "100.00"


def test_fints_paypal_bank_debit_becomes_liability_payment() -> None:
    observation = transaction_to_observation(
        DummyTransaction(
            {
                "date": date(2026, 6, 3),
                "amount": Decimal("-18.99"),
                "currency": "EUR",
                "applicant_name": "PayPal Europe",
                "purpose": "Funding debit",
            }
        ),
        account=SEPAAccount("DE001234", "TESTBIC", "1234", None, "43060967"),
        household_id="household-1",
        source_account_id="account-1",
        owner_user_id="user-1",
    )

    assert observation["event_type"] == "liability_payment"