from decimal import Decimal

import pytest

from app.services.pl_feedback_brand_qty import format_brand_qty_summary, require_brand_qtys_if_needed


def test_format_brand_qty_summary():
    s = format_brand_qty_summary([
        {"brandName": "君正", "qty": Decimal("16")},
        {"brandName": "红四方", "qty": Decimal("12.000")},
    ])
    assert s == "君正 16 / 红四方 12"


def test_format_brand_qty_summary_empty():
    assert format_brand_qty_summary([]) is None


def test_format_brand_qty_summary_zero_only():
    assert format_brand_qty_summary([{"brandName": "君正", "qty": Decimal("0")}]) is None


def test_require_skips_when_no_brand_mode():
    require_brand_qtys_if_needed(
        brand_mode=None,
        required_brand_id=None,
        actual_qty=Decimal("10"),
        rows=[],
        enforce=True,
    )


def test_require_skips_when_not_enforced():
    require_brand_qtys_if_needed(
        brand_mode="any",
        required_brand_id=None,
        actual_qty=Decimal("10"),
        rows=[],
        enforce=False,
    )


def test_require_enforces_when_completed():
    with pytest.raises(ValueError, match="至少一个品牌数量"):
        require_brand_qtys_if_needed(
            brand_mode="any",
            required_brand_id=None,
            actual_qty=Decimal("10"),
            rows=[],
            enforce=True,
        )


def test_require_calls_validate_when_positive_rows(monkeypatch):
    called = {}

    def mock_validate(**kwargs):
        called.update(kwargs)

    monkeypatch.setattr(
        "app.services.pl_feedback_brand_qty.validate_brand_qty_rows",
        mock_validate,
    )
    rows = [{"brandId": "b1", "brandName": "君正", "qty": Decimal("10")}]
    require_brand_qtys_if_needed(
        brand_mode="any",
        required_brand_id=None,
        actual_qty=Decimal("10"),
        rows=rows,
        enforce=True,
    )
    assert called["brand_mode"] == "any"
    assert called["actual_qty"] == Decimal("10")
    assert called["rows"] == rows


def test_persist_io_item_brand_qtys_writes_when_brand_mode_missing():
    """计划行 brand_mode 丢失时，客户端提交的多品牌明细仍应落库（不能只软删不写）。"""
    from app.services.pl_feedback_brand_qty import persist_io_item_brand_qtys

    class _Row:
        def __init__(self):
            self.del_flag = 0
            self.update_by = None

    existing = [_Row()]
    added = []

    class _Query:
        def filter(self, *args, **kwargs):
            return self

        def all(self):
            return existing

    class _Db:
        def query(self, model):
            return _Query()

        def add(self, obj):
            added.append(obj)

    class _Model:
        order_item_id = object()
        tenant_no = object()
        del_flag = object()

        def __init__(self, **kwargs):
            self.__dict__.update(kwargs)

    persist_io_item_brand_qtys(
        _Db(),
        model=_Model,
        tenant_no="t1",
        order_id="o1",
        order_item_id="i1",
        plan_product_id="p1",
        brand_mode=None,
        rows=[
            {"brandId": "b1", "brandName": "君正", "qty": Decimal("20")},
            {"brandId": "b2", "brandName": "红四方", "qty": Decimal("30")},
        ],
        user_id="u1",
    )
    assert existing[0].del_flag == 1
    assert len(added) == 2
    assert {a.brand_id for a in added} == {"b1", "b2"}