"""Tests for protocol invoice request CRUD helpers."""

import unittest
from unittest.mock import MagicMock, patch


class TestInstallmentSummary(unittest.TestCase):
    def test_build_installment_summary_single(self):
        from app.crud.collection_protocol import build_installment_summary

        self.assertEqual(build_installment_summary([1]), "第1期")

    def test_build_installment_summary_multi(self):
        from app.crud.collection_protocol import build_installment_summary

        self.assertEqual(build_installment_summary([1, 2, 3]), "第1、2、3期")

    def test_build_installment_summary_lump_sum(self):
        from app.crud.collection_protocol import build_installment_summary

        self.assertEqual(build_installment_summary([None]), "趸交")


class TestCreateInvoiceRequestValidation(unittest.TestCase):
    def test_rejects_empty_payment_detail_ids(self):
        from app.crud.collection_protocol import create_invoice_request

        mock_db = MagicMock()
        with self.assertRaises(ValueError) as ctx:
            create_invoice_request(
                mock_db,
                collection_protocol_id="proto-1",
                payment_detail_ids=[],
                tenant_no="t1",
            )
        self.assertIn("至少选择", str(ctx.exception))

    @patch("app.crud.collection_protocol._active_invoiced_payment_detail_ids", return_value={"pd-1"})
    def test_rejects_duplicate_payment_detail_in_active_request(self, _mock_active):
        from app.crud.collection_protocol import create_invoice_request

        mock_db = MagicMock()
        with self.assertRaises(ValueError) as ctx:
            create_invoice_request(
                mock_db,
                collection_protocol_id="proto-1",
                payment_detail_ids=["pd-1"],
                tenant_no="t1",
                user_info={"user_id": "u1"},
            )
        self.assertIn("已申请开票", str(ctx.exception))


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