from decimal import Decimal

from settle import (
    PAID_STATUSES,
    CartCandidate,
    MallLine,
    attach_detail_ids,
    build_pay_row,
    match_pay_lines,
    money4,
)


def _line(**overrides) -> MallLine:
    data = dict(
        order_no="ZQD1",
        parent_order_no="",
        supplier_name="广东壹号药业有限公司",
        status="待收货",
        goods_name="阿莫西林",
        product_code="2918",
        bar_code="6921665004933",
        unit_price=Decimal("10.00"),
        pay_price=Decimal("9.85"),
        qty=200,
        goods_amount=Decimal("2000.00"),
        order_paid=Decimal("1970.00"),
        pay_order_dtl_id="881",
    )
    data.update(overrides)
    return MallLine(**data)


def _cart(**overrides) -> CartCandidate:
    data = dict(
        fid=1,
        oms_id=2026100201,
        supplier_name="广东壹号药业有限公司",
        bar_code="6921665004933",
        purchase_qty=200,
        org_code="901",
        multi_platform_flag=0,
    )
    data.update(overrides)
    return CartCandidate(**data)


def test_money4_rounds_half_up():
    assert money4("65.49") == Decimal("65.4900")
    assert money4(Decimal("9.85") * 200) == Decimal("1970.0000")


def test_drops_cancelled_and_keeps_paid_statuses():
    lines = [
        _line(status="已取消", order_no="C1"),
        _line(status="待发货", order_no="P1"),
        _line(status="待收货", order_no="P2"),
        _line(status="已完成", order_no="P3"),
        _line(status="退款/退换货", order_no="R1"),
    ]
    carts = [
        _cart(fid=1, oms_id=1),
        _cart(fid=2, oms_id=2),
        _cart(fid=3, oms_id=3),
    ]
    result = match_pay_lines(lines, carts, existing_keys=set())
    kept = {row["pay_order_no"] for row in result.rows}
    assert kept == {"P1", "P2", "P3"}
    assert {line.order_no for line in result.skipped_status} == {"C1", "R1"}
    assert PAID_STATUSES == {"待发货", "待收货", "已完成"}


def test_purchase_total_uses_discounted_price_times_qty():
    result = match_pay_lines([_line()], [_cart()], existing_keys=set())
    assert len(result.rows) == 1
    row = result.rows[0]
    assert row["purchase_price"] == Decimal("9.8500")
    assert row["purchase_qty"] == 200
    assert row["purchase_total"] == Decimal("1970.0000")
    assert row["operate_type"] == 2
    assert row["platform_type"] == 66
    assert row["status"] is None
    assert row["pay_order_no"] == "ZQD1"
    assert row["pay_order_dtl_id"] == "881"
    assert row["oms_id"] == 2026100201
    assert row["org_code"] == "901"


def test_match_prefers_equal_qty_then_earlier_fid():
    carts = [
        _cart(fid=10, oms_id=1, purchase_qty=50),
        _cart(fid=20, oms_id=2, purchase_qty=200),
        _cart(fid=5, oms_id=3, purchase_qty=200),
    ]
    result = match_pay_lines([_line()], carts, existing_keys=set())
    assert result.rows[0]["oms_id"] == 3


def test_same_barcode_two_lines_consume_distinct_cart_rows():
    carts = [
        _cart(fid=1, oms_id=11, purchase_qty=10),
        _cart(fid=2, oms_id=22, purchase_qty=50),
    ]
    lines = [
        _line(order_no="A", qty=10, pay_price=Decimal("53.40"), pay_order_dtl_id="1"),
        _line(order_no="A", qty=50, pay_price=Decimal("55.21"), pay_order_dtl_id="2"),
    ]
    result = match_pay_lines(lines, carts, existing_keys=set())
    oms = sorted(row["oms_id"] for row in result.rows)
    assert oms == [11, 22]


def test_skips_existing_pay_order_and_dtl():
    result = match_pay_lines(
        [_line()],
        [_cart()],
        existing_keys={("ZQD1", "881")},
    )
    assert result.rows == []
    assert len(result.skipped_dup) == 1


def test_unmatched_without_cart_or_dtl_is_not_inserted():
    no_cart = match_pay_lines([_line(bar_code="999")], [_cart()], existing_keys=set())
    assert no_cart.rows == []
    assert no_cart.unmatched[0][1] == "NO_CART_ROW"

    no_dtl = match_pay_lines(
        [_line(pay_order_dtl_id="")],
        [_cart()],
        existing_keys=set(),
    )
    assert no_dtl.rows == []
    assert no_dtl.unmatched[0][1] == "NO_DTL_ID"


def test_attach_detail_ids_matches_qty_and_pay_price():
    lines = [
        _line(pay_order_dtl_id="", qty=10, pay_price=Decimal("5.29"), goods_name="乳酶生片"),
        _line(pay_order_dtl_id="", qty=50, pay_price=Decimal("55.21"), goods_name="阿德福韦酯胶囊"),
    ]
    details = {
        "ZQD1": {
            "productList": [
                {
                    "orderDetailId": 1001,
                    "productName": "乳酶生片",
                    "quantity": 10,
                    "payPrice4": 5.29,
                },
                {
                    "orderDetailId": 1002,
                    "productName": "阿德福韦酯胶囊",
                    "quantity": 50,
                    "payPrice4": 55.21,
                },
            ]
        }
    }
    attached = attach_detail_ids(lines, details)
    assert [line.pay_order_dtl_id for line in attached] == ["1001", "1002"]


def test_build_pay_row_copies_multi_platform_flag():
    row = build_pay_row(_line(), _cart(multi_platform_flag=1))
    assert row["multi_platform_flag"] == 1
    assert row["supplier_name"] == "广东壹号药业有限公司"
    assert row["bar_code"] == "6921665004933"
    assert row["push_status"] == 0