"""安排运输时合同数量硬拦 / 提醒纯函数单测。"""

from app.services.pl_contract_plan_qty import (
    contract_product_has_fixed_qty,
    effective_arranged_total,
    evaluate_product_qty_for_arrange,
)


def test_effective_arranged_total_subtracts_old():
    assert effective_arranged_total(arranged_total=100, old_plan_qty=30, new_plan_qty=40) == 110.0


def test_effective_arranged_total_rounds():
    assert effective_arranged_total(arranged_total=10.1234, old_plan_qty=1.1, new_plan_qty=2.2) == 11.223


def test_framework_customer_demand_not_fixed():
    assert (
        contract_product_has_fixed_qty(
            contract_type="framework_sale",
            quantity=0,
            quantity_mode="customer_demand",
        )
        is False
    )


def test_framework_fixed_mode_with_qty_is_fixed():
    assert (
        contract_product_has_fixed_qty(
            contract_type="framework_purchase",
            quantity=50,
            quantity_mode="fixed",
        )
        is True
    )


def test_sale_positive_qty_is_fixed():
    assert (
        contract_product_has_fixed_qty(
            contract_type="sale",
            quantity=100,
            quantity_mode="fixed",
        )
        is True
    )


def test_zero_or_empty_qty_not_fixed():
    assert contract_product_has_fixed_qty(contract_type="sale", quantity=0, quantity_mode="fixed") is False
    assert contract_product_has_fixed_qty(contract_type="sale", quantity=None, quantity_mode="fixed") is False


def test_evaluate_skip_when_no_new_qty():
    assert (
        evaluate_product_qty_for_arrange(
            has_fixed_qty=True,
            contract_qty=100,
            arranged_total=80,
            old_plan_qty=0,
            new_plan_qty=0,
        )
        is None
    )


def test_evaluate_overflow_violation():
    r = evaluate_product_qty_for_arrange(
        has_fixed_qty=True,
        contract_qty=100,
        arranged_total=80,
        old_plan_qty=0,
        new_plan_qty=30,
    )
    assert r is not None
    assert r["kind"] == "violation"
    assert r["overflowQty"] == 10.0
    assert r["effectiveTotal"] == 110.0
    assert r["arrangedTotalQty"] == 110.0


def test_evaluate_remaining_reminder():
    r = evaluate_product_qty_for_arrange(
        has_fixed_qty=True,
        contract_qty=200,
        arranged_total=150,
        old_plan_qty=0,
        new_plan_qty=40,
    )
    assert r is not None
    assert r["kind"] == "remaining"
    assert r["remainingQty"] == 10.0
    assert r["arrangedTotalQty"] == 190.0


def test_evaluate_rearrange_deducts_old():
    # arranged 已含旧 30；改为 40 → effective 110
    r = evaluate_product_qty_for_arrange(
        has_fixed_qty=True,
        contract_qty=100,
        arranged_total=100,
        old_plan_qty=30,
        new_plan_qty=40,
    )
    assert r is not None
    assert r["kind"] == "violation"
    assert r["overflowQty"] == 10.0


def test_evaluate_framework_cumulative():
    r = evaluate_product_qty_for_arrange(
        has_fixed_qty=False,
        contract_qty=None,
        arranged_total=126.5,
        old_plan_qty=0,
        new_plan_qty=28,
    )
    assert r is not None
    assert r["kind"] == "framework_cumulative"
    assert r["arrangedTotalQty"] == 154.5
    assert r["thisPlanQty"] == 28.0