"""运输计划多段：内部客户地磅默认值与数量平衡校验"""
from decimal import Decimal

from app.services.pl_internal_customer import INTERNAL_CUSTOMER_NAMES
from app.services.pl_plan_stop_rules import (
    load_delivery_product_gap,
    normalize_stop_dibang_fields,
    resolve_stop_dibang_defaults,
    warn_qty_imbalance,
)


def test_internal_shanxia_load_outbound():
    name = "安庆市山峡化工有限公司"
    assert name in INTERNAL_CUSTOMER_NAMES
    assert resolve_stop_dibang_defaults(name, "load") == (True, "outbound")


def test_internal_shanxia_delivery_inbound():
    name = "安庆市山峡化工有限公司"
    assert resolve_stop_dibang_defaults(name, "delivery") == (True, "inbound")


def test_internal_yundong_load_outbound():
    name = "安徽云栋化工有限公司"
    assert resolve_stop_dibang_defaults(name, "load") == (True, "outbound")


def test_internal_yundong_delivery_inbound():
    name = "安徽云栋化工有限公司"
    assert resolve_stop_dibang_defaults(name, "delivery") == (True, "inbound")


def test_external_customer_no_dibang():
    assert resolve_stop_dibang_defaults("外部客户有限公司", "load") == (False, "none")
    assert resolve_stop_dibang_defaults("外部客户有限公司", "delivery") == (False, "none")


def test_delivery_defaults_use_delivery_customer():
    """送货段地磅默认以本段客户是否为内部客户为准。"""
    internal = "安庆市山峡化工有限公司"
    assert resolve_stop_dibang_defaults(internal, "delivery") == (True, "inbound")
    assert resolve_stop_dibang_defaults("外部客户有限公司", "delivery") == (False, "none")


def test_normalize_stop_dibang_fields_repairs_none_direction():
    gen, direction = normalize_stop_dibang_fields(
        "安庆市山峡化工有限公司",
        "delivery",
        1,
        "none",
    )
    assert gen == 1
    assert direction == "inbound"


def test_normalize_respects_explicit_uncheck_for_internal_customer():
    """内部客户显式传 0（如可选车皖H21522 取消勾选）时须保留，不得用默认值强制回 1。"""
    gen, direction = normalize_stop_dibang_fields(
        "安庆市山峡化工有限公司",
        "load",
        0,
        "none",
    )
    assert gen == 0
    assert direction == "none"


def test_normalize_respects_explicit_uncheck_for_internal_delivery():
    gen, direction = normalize_stop_dibang_fields(
        "安徽云栋化工有限公司",
        "delivery",
        0,
        "inbound",
    )
    assert gen == 0
    assert direction == "none"


def test_normalize_forces_off_for_external_even_when_checked():
    gen, direction = normalize_stop_dibang_fields(
        "外部客户有限公司",
        "load",
        1,
        "outbound",
    )
    assert gen == 0
    assert direction == "none"


def test_normalize_keeps_explicit_check_for_internal():
    gen, direction = normalize_stop_dibang_fields(
        "安庆市山峡化工有限公司",
        "load",
        1,
        "outbound",
    )
    assert gen == 1
    assert direction == "outbound"


def test_external_empty_name_no_dibang():
    assert resolve_stop_dibang_defaults(None, "load") == (False, "none")
    assert resolve_stop_dibang_defaults("  ", "delivery") == (False, "none")


def test_warn_qty_balanced_returns_empty():
    plan = [{"quantity": Decimal("30")}]
    load = [{"plan_qty": Decimal("30")}]
    delivery = [{"plan_qty": Decimal("30")}]
    assert warn_qty_imbalance(plan, load, delivery) == []


def test_warn_qty_uses_plan_qty_on_plan_products():
    plan = [{"plan_qty": Decimal("28")}]
    load = [{"plan_qty": Decimal("28")}]
    delivery = [{"plan_qty": Decimal("28")}]
    assert warn_qty_imbalance(plan, load, delivery) == []


def test_warn_qty_load_vs_delivery_imbalance():
    plan = [{"quantity": Decimal("28")}]
    load = [{"plan_qty": Decimal("30")}]
    delivery = [{"plan_qty": Decimal("28")}]
    warnings = warn_qty_imbalance(plan, load, delivery)
    assert warnings == [
        "装货合计(30)与送货合计(28)不一致，请核对",
    ]


def test_warn_qty_delivery_vs_load_imbalance():
    plan = [{"quantity": Decimal("30")}]
    load = [{"plan_qty": Decimal("30")}]
    delivery = [{"plan_qty": Decimal("25")}]
    warnings = warn_qty_imbalance(plan, load, delivery)
    assert warnings == [
        "装货合计(30)与送货合计(25)不一致，请核对",
    ]


def test_warn_qty_load_delivery_decimal_imbalance():
    plan = [{"quantity": Decimal("30")}]
    load = [{"plan_qty": Decimal("30")}]
    delivery = [{"plan_qty": Decimal("30.31")}]
    warnings = warn_qty_imbalance(plan, load, delivery)
    assert warnings == [
        "装货合计(30)与送货合计(30.31)不一致，请核对",
    ]


def test_warn_qty_multi_stop_30_equals_10_15_5_balanced():
    """验收场景：计划 30 = 送货 10+15+5，装货 30。"""
    plan = [{"quantity": Decimal("30")}]
    load = [{"plan_qty": Decimal("30")}]
    delivery = [
        {"plan_qty": Decimal("10")},
        {"plan_qty": Decimal("15")},
        {"plan_qty": Decimal("5")},
    ]
    assert warn_qty_imbalance(plan, load, delivery) == []


def test_warn_qty_sums_multiple_rows_balanced_across_stops():
    plan = [{"quantity": Decimal("10")}, {"quantity": Decimal("20")}]
    load = [{"plan_qty": Decimal("10")}, {"plan_qty": Decimal("15")}]
    delivery = [{"plan_qty": Decimal("25")}]
    assert warn_qty_imbalance(plan, load, delivery) == []


def test_warn_qty_sums_multiple_rows_imbalanced_across_stops():
    plan = [{"quantity": Decimal("10")}, {"quantity": Decimal("20")}]
    load = [{"plan_qty": Decimal("10")}, {"plan_qty": Decimal("15")}]
    delivery = [{"plan_qty": Decimal("24")}]
    warnings = warn_qty_imbalance(plan, load, delivery)
    assert warnings == [
        "装货合计(25)与送货合计(24)不一致，请核对",
    ]


def test_same_product_quantities_sum_across_packages_and_delivery_stops():
    load = [
        {"product_id": "a", "product_name": "尿素", "plan_qty": Decimal("8")},
        {"product_id": "a", "product_name": "尿素", "plan_qty": Decimal("2")},
    ]
    delivery = [
        {"product_id": "a", "product_name": "尿素", "plan_qty": Decimal("6")},
        {"product_id": "a", "product_name": "尿素", "plan_qty": Decimal("4")},
    ]
    assert warn_qty_imbalance([], load, delivery) == []


def test_warn_qty_names_each_product_when_sums_differ():
    load = [
        {"product_id": "a", "product_name": "尿素", "plan_qty": Decimal("10")},
        {"product_id": "b", "product_name": "甲醇", "plan_qty": Decimal("5")},
    ]
    delivery = [
        {"product_id": "a", "product_name": "尿素", "plan_qty": Decimal("6")},
        {"product_id": "b", "product_name": "甲醇", "plan_qty": Decimal("9")},
    ]
    assert warn_qty_imbalance([], load, delivery) == [
        "产品尿素：装货合计(10)与送货合计(6)不一致，请核对",
        "产品甲醇：装货合计(5)与送货合计(9)不一致，请核对",
    ]


def test_product_set_mismatch_names_both_sides():
    load = {
        "products": [
            {"product_id": "a", "product_name": "A"},
            {"product_id": "d", "product_name": "D"},
        ]
    }
    deliveries = [
        {"products": [{"product_id": "a", "product_name": "A"}]},
        {
            "products": [
                {"product_id": "b", "product_name": "B"},
                {"product_id": "c", "product_name": "C"},
            ]
        },
    ]
    assert load_delivery_product_gap(load, deliveries) == (
        "装货段有产品 D，送货段没有；送货段有产品 B、C，装货段没有。两边产品必须一致，不能保存"
    )


def test_same_product_with_different_packages_is_one_product():
    load = {
        "products": [
            {"product_id": "a", "product_name": "尿素", "package_spec": "桶"},
            {"product_id": "a", "product_name": "尿素", "package_spec": "散装"},
        ]
    }
    deliveries = [{"products": [{"product_id": "a", "product_name": "尿素", "package_spec": "袋"}]}]
    assert load_delivery_product_gap(load, deliveries) == ""


def test_empty_product_rows_match():
    assert load_delivery_product_gap({"products": []}, [{"products": []}]) == ""