"""按样本缴费：转账状态机与批次已缴/欠缴计算"""

from decimal import Decimal
import unittest

from app.services.protocol_transfer_status import (
    can_confirm_receipt,
    can_submit_receipt,
    schedule_paid_and_arrears,
)


class TestTransferStatusRules(unittest.TestCase):
    def test_submit_only_dfj(self):
        self.assertTrue(can_submit_receipt("dfj"))
        self.assertFalse(can_submit_receipt("jfqrz"))
        self.assertFalse(can_submit_receipt("yjf"))
        self.assertFalse(can_submit_receipt(""))
        self.assertFalse(can_submit_receipt(None))

    def test_confirm_only_jfqrz(self):
        self.assertTrue(can_confirm_receipt("jfqrz"))
        self.assertFalse(can_confirm_receipt("dfj"))
        self.assertFalse(can_confirm_receipt("yjf"))

    def test_schedule_arrears(self):
        paid, arrears = schedule_paid_and_arrears(
            due=Decimal("1000"),
            confirmed_transfers=[Decimal("300"), Decimal("200")],
        )
        self.assertEqual(paid, Decimal("500"))
        self.assertEqual(arrears, Decimal("500"))

    def test_schedule_arrears_overpay(self):
        paid, arrears = schedule_paid_and_arrears(
            due=Decimal("100"),
            confirmed_transfers=[Decimal("60"), Decimal("50")],
        )
        self.assertEqual(paid, Decimal("110"))
        self.assertEqual(arrears, Decimal("-10"))


if __name__ == "__main__":
    unittest.main()