"""样本运费：运输方式字典解析与关联规则"""

import unittest
from decimal import Decimal
from unittest.mock import MagicMock

from app.services.sample_transport_mode import resolve_transport_mode_value


class TestResolveTransportMode(unittest.TestCase):
    def test_empty_raises(self):
        db = MagicMock()
        with self.assertRaises(ValueError):
            resolve_transport_mode_value(db, tenant_no="zkxw", raw="", user_id=None)

    def test_hit_by_value(self):
        db = MagicMock()
        type_exists = MagicMock()
        row = MagicMock(dict_value="sfkd", dict_label="顺丰快递", del_flag=0)
        db.query.return_value.filter.return_value.first.side_effect = [type_exists, row]
        self.assertEqual(
            resolve_transport_mode_value(db, tenant_no="zkxw", raw="sfkd", user_id=None),
            "sfkd",
        )

    def test_hit_by_label_then_create_path_not_called(self):
        db = MagicMock()
        type_exists = MagicMock()
        miss = None
        hit = MagicMock(dict_value="zxc", dict_label="专线车", del_flag=0)
        db.query.return_value.filter.return_value.first.side_effect = [
            type_exists,
            miss,
            hit,
        ]
        self.assertEqual(
            resolve_transport_mode_value(db, tenant_no="zkxw", raw="专线车", user_id=None),
            "zxc",
        )
        db.add.assert_not_called()


class TestFreightAmountValidation(unittest.TestCase):
    def test_negative_rejected(self):
        from app.crud.sample_freight import _parse_amount

        with self.assertRaises(ValueError):
            _parse_amount(-1)

    def test_zero_ok(self):
        from app.crud.sample_freight import _parse_amount

        self.assertEqual(_parse_amount(0), Decimal("0"))

    def test_empty_rejected(self):
        from app.crud.sample_freight import _parse_amount

        with self.assertRaises(ValueError):
            _parse_amount(None)
        with self.assertRaises(ValueError):
            _parse_amount("")


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