from __future__ import annotations

from decimal import Decimal

from persist import build_result
from pipeline import KIND_BUSINESS_FAIL, KIND_SUCCESS, KIND_SYSTEM_FAIL, SelectionResult
from rules import Allocation, Candidate, PurchaseLine, Rejected, normalize_vendor


HANGZHOU = "杭州小药药自营旗舰店"
CHANGSHA = "长沙小药药自营旗舰店"
GUANGDONG = "广东壹号药业有限公司"


def _purchase(**overrides) -> PurchaseLine:
    data = {
        "approval_no": "国药准字H20100001",
        "sale_price": 100.0,
        "qty": 10.0,
        "oms_id": 2026100201,
        "bar_code": "06901234567890",
        "generic_name": "阿莫西林",
        "org_code": "907",
    }
    data.update(overrides)
    return PurchaseLine(**data)


def _candidate(**overrides) -> Candidate:
    vendor_raw = overrides.get("vendor_raw", GUANGDONG)
    data = {
        "mall_name": "1号药城",
        "sku_id": "S1",
        "name": "阿莫西林",
        "spec": "0.25g",
        "price": 90.0,
        "expiry_raw": "13",
        "expiry_months": 13.0,
        "vendor_raw": vendor_raw,
        "vendor_norm": normalize_vendor(vendor_raw),
        "stock": 20.0,
        "extra": {},
    }
    data.update(overrides)
    if "vendor_raw" in overrides and "vendor_norm" not in overrides:
        data["vendor_norm"] = normalize_vendor(overrides["vendor_raw"])
    return Candidate(**data)


def _success(allocations: list[Allocation], malls: list[str] | None = None) -> SelectionResult:
    return SelectionResult(
        kind=KIND_SUCCESS,
        reason="SELECTED",
        allocations=allocations,
        rejected=[],
        malls=malls or ["1号药城", "药帮忙"],
    )


def test_split_two_platforms_writes_allocated_qty():
    result = build_result(
        _purchase(),
        _success(
            [
                Allocation(
                    _candidate(
                        mall_name="药帮忙",
                        vendor_raw=HANGZHOU,
                        price=88.0,
                    ),
                    3,
                ),
                Allocation(_candidate(price=90.0), 7),
            ]
        ),
    )
    assert result.deal_flag == 1
    assert "选品成功" in result.deal_result
    assert len(result.cart_rows) == 2
    ybm = next(row for row in result.cart_rows if row["platform_type"] == 48)
    yaoex = next(row for row in result.cart_rows if row["platform_type"] == 66)
    assert ybm["purchase_qty"] == 3
    assert ybm["purchase_price"] == Decimal("88.0000")
    assert ybm["purchase_total"] == Decimal("264.0000")
    assert ybm["supplier_name"] == HANGZHOU
    assert yaoex["purchase_qty"] == 7
    assert yaoex["purchase_total"] == Decimal("630.0000")
    assert all(row["status"] == 1 for row in result.cart_rows)
    assert all(row["multi_platform_flag"] == 1 for row in result.cart_rows)
    assert all(row["push_status"] == 0 for row in result.cart_rows)


def test_two_warehouses_same_platform_flag_off():
    result = build_result(
        _purchase(),
        _success(
            [
                Allocation(
                    _candidate(mall_name="药帮忙", vendor_raw=HANGZHOU, price=88.0),
                    3,
                ),
                Allocation(
                    _candidate(mall_name="药帮忙", vendor_raw=CHANGSHA, price=90.0),
                    7,
                ),
            ],
            malls=["药帮忙"],
        ),
    )
    assert len(result.cart_rows) == 2
    assert all(row["platform_type"] == 48 for row in result.cart_rows)
    assert all(row["multi_platform_flag"] == 0 for row in result.cart_rows)


def test_stock_insufficient_business_fail():
    result = build_result(
        _purchase(),
        SelectionResult(
            kind=KIND_BUSINESS_FAIL,
            reason="STOCK_INSUFFICIENT",
            allocations=[],
            rejected=[Rejected(_candidate(vendor_raw="路边店"), "NOT_SELF_WAREHOUSE")],
            malls=["1号药城", "药帮忙"],
        ),
    )
    assert result.deal_flag == 2
    assert "库存不足" in result.deal_result
    assert len(result.cart_rows) == 2
    assert all(row["status"] == 2 for row in result.cart_rows)
    assert all("库存不足" in (row["fail_reason"] or "") for row in result.cart_rows)
    assert all(row["multi_platform_flag"] == 1 for row in result.cart_rows)


def test_margin_fail_text_is_4_percent():
    result = build_result(
        _purchase(),
        SelectionResult(
            kind=KIND_BUSINESS_FAIL,
            reason="MARGIN_LT_4PCT",
            allocations=[],
            rejected=[],
            malls=["1号药城"],
        ),
    )
    assert "毛利不足 4%" in result.deal_result
    assert "毛利不足 4%" in (result.cart_rows[0]["fail_reason"] or "")


def test_system_fault_deal_result_fits_varchar2_200_byte():
    blob = "药帮忙接口返回非JSON" + ("<html>probe" * 40)
    result = build_result(
        _purchase(),
        SelectionResult(
            kind=KIND_SYSTEM_FAIL,
            reason="SYSTEM_FAULT",
            allocations=[],
            rejected=[],
            malls=["1号药城", "药帮忙"],
            mall_errors={"药帮忙": f"QUERY_FAILED:{blob}"},
        ),
    )
    assert len(result.deal_result.encode("gbk")) <= 200
    assert result.deal_result.startswith("系统故障")


def test_system_fault_uses_per_mall_errors():
    result = build_result(
        _purchase(),
        SelectionResult(
            kind=KIND_SYSTEM_FAIL,
            reason="SYSTEM_FAULT",
            allocations=[],
            rejected=[],
            malls=["1号药城", "药帮忙"],
            mall_errors={"药帮忙": "LOGIN_FAILED:timeout"},
        ),
    )
    assert result.deal_flag == 2
    assert result.deal_result.startswith("系统故障")
    ybm = next(row for row in result.cart_rows if row["platform_type"] == 48)
    yaoex = next(row for row in result.cart_rows if row["platform_type"] == 66)
    assert "LOGIN_FAILED:timeout" in (ybm["fail_reason"] or "")
    assert "对端平台不可用" in (yaoex["fail_reason"] or "")


def test_failure_total_is_price_times_plan_qty():
    result = build_result(
        _purchase(sale_price=12.5, qty=3),
        SelectionResult(
            kind=KIND_BUSINESS_FAIL,
            reason="NO_HIT",
            allocations=[],
            rejected=[],
            malls=["1号药城"],
        ),
    )
    row = result.cart_rows[0]
    assert row["purchase_price"] == Decimal("12.5000")
    assert row["purchase_qty"] == 3
    assert row["purchase_total"] == Decimal("37.5000")
    assert row["supplier_name"] == "无符合规则供应商"