# ============================================================
# 订单管理领域服务（moduleId: domain-orders, 可重生 ✅）
# 职责：销售订单只读投影 + P2 订单写入动作的纯应用逻辑
# 规则：新增/编辑/取消/完成/删除订单均写主干世界，必须由调用方走 Harness 确认卡
# ============================================================
from __future__ import annotations                    # 前向类型引用

from datetime import datetime                         # 时间戳
from typing import Any                                # 类型标注

from server.timeutil import fmt_dt, today0            # 时间格式化

World = dict[str, Any]                                # 世界状态类型别名

# 当前数据模型的订单状态。后续订单池审批会扩展为更完整状态机。
ORDER_STATUSES = {
    "DRAFT", "SUBMITTED", "APPROVED", "REJECTED", "CHANGED",
    "CANCELLED", "COMPLETED",
    "CONFIRMED",  # 遗留别名 ≡ APPROVED（排产资格相同）
}
# 正式排产默认纳入的状态（OR-03）
SCHEDULABLE_STATUSES = {"APPROVED", "CONFIRMED"}
# 可提交审核
SUBMITTABLE_STATUSES = {"DRAFT", "REJECTED", "CHANGED"}
# 可批准/驳回
REVIEWABLE_STATUSES = {"SUBMITTED", "CHANGED"}

CUSTOMER_LEVELS = {"VIP", "A", "B", "C"}
ORDER_ACTIONS = (
    "order.upsert", "order.cancel", "order.complete", "order.delete", "order.clear",
    "order.submit", "order.approve", "order.reject",
)

POOL_LANES = {
    "pending": ("SUBMITTED",),
    "approved": ("APPROVED", "CONFIRMED"),
    "changed": ("CHANGED",),
    "draft": ("DRAFT", "REJECTED"),
    "closed": ("CANCELLED", "COMPLETED"),
}


def normalize_status(status: str | None, *, default: str = "DRAFT") -> str:
    s = str(status or default).upper()
    if s == "CONFIRMED":
        return "APPROVED"  # 新写入统一为 APPROVED
    if s not in ORDER_STATUSES:
        raise ValueError(
            "订单状态必须是 DRAFT/SUBMITTED/APPROVED/REJECTED/CHANGED/CANCELLED/COMPLETED")
    return s


def is_schedulable(status: str | None, *, include_unapproved: bool = False) -> bool:
    s = str(status or "")
    if s in SCHEDULABLE_STATUSES:
        return True
    if include_unapproved and s in ("DRAFT", "SUBMITTED", "CHANGED", "REJECTED"):
        return True
    return False


def _now() -> str:
    """当前时间字符串（与世界状态 createdAt/updatedAt 口径一致）。"""
    return fmt_dt(datetime.now())


def _product(world: World, product_id: int) -> dict[str, Any]:
    """取成品物料；不存在则抛出 ValueError，阻止脏订单进入世界状态。"""
    product = next((m for m in world["materials"]
                    if m["id"] == product_id and m["type"] == "FINISHED_PRODUCT"), None)
    if product is None:
        raise ValueError(f"产品不存在或不是成品：{product_id}")
    return product


def _next_item_id(world: World) -> int:
    """销售订单明细发号：扫描现有 items，避免改 WorldStore 计数器契约。"""
    max_id = 0
    for so in world.get("salesOrders", []):
        for item in so.get("items", []):
            if isinstance(item.get("id"), int):
                max_id = max(max_id, item["id"])
    return max_id + 1


def list_products(world: World) -> list[dict[str, Any]]:
    """成品下拉选项（P0 只读）。"""
    return [{
        "id": m["id"],
        "code": m["code"],
        "name": m["name"],
        "unit": m["unit"],
    } for m in world["materials"] if m["type"] == "FINISHED_PRODUCT"]


def _flex_status_to_sales(status: str | None) -> str:
    """现场/SQL 柔性订单状态 → 销售订单状态机。"""
    s = str(status or "").upper()
    if s in ("RELEASED", "RELEASE", "OPEN", "IN_PROGRESS", "PRODUCING", "PLANNED"):
        return "APPROVED"
    if s in ("DONE", "COMPLETED", "FINISHED", "CLOSED"):
        return "COMPLETED"
    if s in ("CANCELLED", "CANCELED"):
        return "CANCELLED"
    if s in ("DRAFT", "CREATED"):
        return "DRAFT"
    if s in ORDER_STATUSES or s == "CONFIRMED":
        try:
            return normalize_status(s)
        except ValueError:
            return "APPROVED"
    return "APPROVED"


def sync_flex_orders_to_sales(world: World) -> int:
    """把 flexOrders 投影为 salesOrders，供订单管理 / MRP 分解使用。

    仅替换 source∈{SQL,FLEX,SITE} 的行，保留用户手工销售单。
    跳过演示厂 FO-26* / 无经典物料 id 的行，避免污染固定轨 RULE 引擎。
    """
    demo_mat = {
        "HV-HARNESS", "PDU-UNIT", "CHARGE-GUN", "HV-CONN",
        "CTRL-A", "CTRL-B", "CTRL-C",
    }
    flex = []
    for o in world.get("flexOrders") or []:
        if (o.get("status") or "") in ("DONE", "CANCELLED", "COMPLETED"):
            continue
        ono = str(o.get("orderNo") or "")
        pc = str(o.get("productCode") or "")
        if ono.startswith(("FO-26", "SO-DEMO")):
            continue
        if pc in demo_mat:
            continue
        flex.append(o)
    kept = [so for so in (world.get("salesOrders") or [])
            if str(so.get("source") or "MANUAL").upper() not in ("SQL", "FLEX", "SITE")]
    mats = {m.get("code"): m for m in (world.get("materials") or []) if m.get("code")}
    # 缺物料时从 flexMaterials 补进经典表，保证有正整数 id
    flex_mats = {m.get("code"): m for m in (world.get("flexMaterials") or []) if m.get("code")}
    next_mat = max((m.get("id", 0) for m in (world.get("materials") or [])
                    if isinstance(m.get("id"), int)), default=0) + 1
    next_so = max((so.get("id", 0) for so in kept if isinstance(so.get("id"), int)), default=0) + 1
    next_item = _next_item_id({"salesOrders": kept})
    today = fmt_dt(today0())[:10]
    added = 0
    for fo in flex:
        ono = str(fo.get("orderNo") or "").strip()
        pc = str(fo.get("productCode") or "").strip()
        if not ono or not pc:
            continue
        if any(so.get("orderNo") == ono for so in kept):
            continue
        mat = mats.get(pc)
        if mat is None:
            fm = flex_mats.get(pc) or {
                "code": pc, "name": fo.get("productName") or pc,
                "type": "FINISHED_PRODUCT", "unit": "件",
            }
            mat = {
                "id": next_mat, "code": pc,
                "name": fm.get("name") or pc,
                "spec": fm.get("spec") or "",
                "type": fm.get("type") or "FINISHED_PRODUCT",
                "unit": fm.get("unit") or "件",
                "productFamily": "",
                "safetyStock": float(fm.get("safetyStock") or 0),
                "procurementLeadTime": float(fm.get("procurementLeadTime") or 0),
                "stock": float(fm.get("stock") or 0),
                "inTransit": float(fm.get("inTransit") or 0),
                "status": "ACTIVE",
            }
            world.setdefault("materials", []).append(mat)
            mats[pc] = mat
            next_mat += 1
        pid = mat.get("id")
        if not isinstance(pid, int) or pid <= 0:
            continue
        st = _flex_status_to_sales(fo.get("status"))
        qty = float(fo.get("quantity") or 0) or 1
        kept.append({
            "id": next_so,
            "orderNo": ono,
            "customerName": fo.get("customerName") or "现场客户",
            "customerLevel": fo.get("customerLevel") or "B",
            "orderDate": str(fo.get("orderDate") or today)[:10],
            "deliveryDate": str(fo.get("dueDate") or today)[:10],
            "priority": int(fo.get("priority") or 5),
            "status": st,
            "source": "SQL" if fo.get("craftlCode") else "FLEX",
            "isRush": bool(fo.get("isRush")),
            "specialRequirements": fo.get("drawingNo") or "",
            "totalAmount": 0,
            "createdAt": _now(), "updatedAt": _now(),
            "items": [{
                "id": next_item, "productId": pid, "productCode": pc,
                "productName": fo.get("productName") or mat.get("name") or pc,
                "quantity": qty, "unit": mat.get("unit") or "件",
                "status": "PENDING" if st == "APPROVED" else st,
            }],
        })
        next_so += 1
        next_item += 1
        added += 1
    world["salesOrders"] = kept
    return added


def list_orders(world: World) -> list[dict[str, Any]]:
    """销售订单列表投影（含已投影的 SQL/柔性单；只读兜底不写盘）。"""
    rows: list[dict[str, Any]] = []
    for so in world.get("salesOrders") or []:
        items = so.get("items", [])
        first = items[0] if items else {}
        rows.append({
            "id": so["id"],
            "orderNo": so["orderNo"],
            "customerName": so["customerName"],
            "customerLevel": so.get("customerLevel") or "B",
            "orderDate": so.get("orderDate") or "",
            "deliveryDate": so.get("deliveryDate") or so.get("dueDate") or "",
            "priority": so.get("priority") or 5,
            "status": _flex_status_to_sales(so.get("status")),
            "source": so.get("source", "MANUAL"),
            "isRush": so.get("isRush", False),
            "rushStrategy": so.get("rushStrategy"),
            "specialRequirements": so.get("specialRequirements", ""),
            "totalAmount": so.get("totalAmount", 0),
            "itemCount": len(items),
            "productId": first.get("productId"),
            "productCode": first.get("productCode", ""),
            "productName": first.get("productName", ""),
            "quantity": first.get("quantity", 0),
            "unit": first.get("unit", "件"),
            "updatedAt": so.get("updatedAt") or so.get("createdAt"),
            "reviewNote": so.get("reviewNote") or "",
            "schedulable": is_schedulable(_flex_status_to_sales(so.get("status"))),
        })
    # 兜底：销售表空时只读展柔性订单（不写 salesOrders，避免污染演示世界）
    if not rows:
        mats = {m.get("code"): m for m in (world.get("materials") or [])}
        for i, fo in enumerate(world.get("flexOrders") or []):
            if (fo.get("status") or "") in ("DONE", "CANCELLED", "COMPLETED"):
                continue
            ono = str(fo.get("orderNo") or "")
            if ono.startswith(("FO-26", "SO-DEMO")):
                continue
            pc = fo.get("productCode") or ""
            st = _flex_status_to_sales(fo.get("status"))
            rows.append({
                "id": 10_000_000 + int(fo.get("id") or i),
                "orderNo": fo.get("orderNo"),
                "customerName": fo.get("customerName") or "现场客户",
                "customerLevel": "B",
                "orderDate": "",
                "deliveryDate": fo.get("dueDate") or "",
                "priority": fo.get("priority") or 5,
                "status": st,
                "source": "FLEX",
                "isRush": False,
                "itemCount": 1,
                "productId": (mats.get(pc) or {}).get("id"),
                "productCode": pc,
                "productName": fo.get("productName") or (mats.get(pc) or {}).get("name") or pc,
                "quantity": fo.get("quantity") or 0,
                "unit": "件",
                "schedulable": is_schedulable(st),
            })
    rows.sort(key=lambda x: (
        x["status"] in ("CANCELLED", "COMPLETED"),
        x["status"] not in ("SUBMITTED", "CHANGED", "APPROVED"),
        x["deliveryDate"], x["priority"],
    ))
    return rows


def pool_summary(world: World) -> dict[str, Any]:
    """订单池看板计数（只读，不写盘）。"""
    counts = {k: 0 for k in POOL_LANES}
    counts["all"] = 0
    counts["schedulable"] = 0
    for row in list_orders(world):
        counts["all"] += 1
        st = row.get("status")
        if is_schedulable(st):
            counts["schedulable"] += 1
        for lane, statuses in POOL_LANES.items():
            if st in statuses:
                counts[lane] += 1
                break
    return counts


def list_production_orders(world: World) -> list[dict[str, Any]]:
    """生产订单/虚拟产线投影：优先最新柔性排产版本，其次固定轨 productionOrders。"""
    rows: list[dict[str, Any]] = []
    flex_vers = world.get("flexScheduleVersions") or []
    if flex_vers:
        ver = flex_vers[-1]
        vid = ver.get("id")
        orders_by_no = {o.get("orderNo"): o for o in (world.get("flexOrders") or [])}
        for vl in world.get("flexVirtualLines") or []:
            if vl.get("versionId") != vid:
                continue
            ono = vl.get("orderNo")
            o = orders_by_no.get(ono) or {}
            wos = [w for w in (world.get("flexWorkOrders") or [])
                   if w.get("versionId") == vid and w.get("vlId") == vl.get("id")]
            rows.append({
                "id": vl.get("id"),
                "orderNo": ono,
                "vlNo": vl.get("vlNo"),
                "productCode": vl.get("productCode") or o.get("productCode"),
                "productName": o.get("productName") or vl.get("productCode"),
                "quantity": vl.get("quantity") or o.get("quantity"),
                "dueDate": o.get("dueDate"),
                "plannedStart": vl.get("plannedStart"),
                "plannedEnd": vl.get("plannedEnd"),
                "stepCount": len(wos) or vl.get("stepCount") or 0,
                "status": vl.get("status") or "PLANNED",
                "versionNo": ver.get("versionNo"),
                "track": "flex",
            })
        return rows
    for po in world.get("productionOrders") or []:
        rows.append({
            "id": po.get("id"),
            "orderNo": po.get("orderNo") or po.get("salesOrderNo"),
            "vlNo": po.get("poNo") or po.get("code"),
            "productCode": po.get("productCode"),
            "productName": po.get("productName"),
            "quantity": po.get("quantity"),
            "dueDate": po.get("dueDate"),
            "plannedStart": po.get("plannedStart"),
            "plannedEnd": po.get("plannedEnd"),
            "stepCount": po.get("woCount") or 0,
            "status": po.get("status") or "PLANNED",
            "versionNo": po.get("schedulingVersionId"),
            "track": "fixed",
        })
    return rows


def find_product_by_hint(world: World, hint: str) -> dict[str, Any] | None:
    """按编码/名称模糊解析成品（对话建单用）：先精确编码，再名称包含匹配。"""
    h = (hint or "").strip()
    if not h:
        return None
    products = [m for m in world.get("materials") or [] if m.get("type") == "FINISHED_PRODUCT"]
    if not products:
        products = [m for m in world.get("flexMaterials") or [] if m.get("type") == "FINISHED_PRODUCT"]
    exact = next((m for m in products if str(m.get("code") or "").lower() == h.lower()), None)
    if exact:
        return exact
    return next(
        (m for m in products
         if h in str(m.get("name") or "") or str(m.get("name") or "") in h
         or h.lower() in str(m.get("code") or "").lower()),
        None,
    )


def find_order(world: World, *, order_id: int | None = None, order_no: str | None = None) -> dict[str, Any] | None:
    """按 ID 或订单号查订单（P0 只读；含柔性表只读回退）。"""
    if order_id is not None:
        hit = next((so for so in world.get("salesOrders") or [] if so["id"] == order_id), None)
        if hit:
            return hit
    if order_no:
        hit = next((so for so in world.get("salesOrders") or []
                    if str(so.get("orderNo") or "").lower() == order_no.lower()), None)
        if hit:
            return hit
        fo = next((o for o in world.get("flexOrders") or []
                   if str(o.get("orderNo") or "").lower() == order_no.lower()), None)
        if fo:
            return {
                "id": fo.get("id"), "orderNo": fo.get("orderNo"),
                "customerName": fo.get("customerName") or "现场客户",
                "customerLevel": "B", "deliveryDate": fo.get("dueDate"),
                "priority": fo.get("priority") or 5,
                "status": _flex_status_to_sales(fo.get("status")),
                "source": "FLEX", "items": [{
                    "productCode": fo.get("productCode"),
                    "productName": fo.get("productName"),
                    "quantity": fo.get("quantity"), "unit": "件",
                }],
            }
    return None


def normalize_order_payload(world: World, payload: dict[str, Any]) -> dict[str, Any]:
    """订单写入载荷归一化与校验（P0 纯校验）。"""
    out = dict(payload)
    if out.get("id") in ("", None):
        out.pop("id", None)
    elif not isinstance(out["id"], int):
        out["id"] = int(out["id"])
    out["customerName"] = str(out.get("customerName") or "").strip()
    if not out["customerName"]:
        raise ValueError("客户名称不能为空")
    out["customerLevel"] = str(out.get("customerLevel") or "A").upper()
    if out["customerLevel"] not in CUSTOMER_LEVELS:
        raise ValueError("客户等级必须是 VIP/A/B/C")
    out["deliveryDate"] = str(out.get("deliveryDate") or "").strip()
    if not out["deliveryDate"]:
        raise ValueError("交期不能为空")
    out["priority"] = max(1, min(9, int(out.get("priority") or 5)))
    out["productId"] = int(out.get("productId") or 0)
    product = _product(world, out["productId"])
    out["productName"] = product["name"]
    out["productCode"] = product["code"]
    out["unit"] = product["unit"]
    out["quantity"] = max(1, int(float(out.get("quantity") or 1)))
    # 新建默认 DRAFT；遗留 CONFIRMED 写入时归一为 APPROVED
    default_status = "DRAFT" if not out.get("id") else "APPROVED"
    out["status"] = normalize_status(out.get("status"), default=default_status)
    out["isRush"] = bool(out.get("isRush", False))
    out["rushStrategy"] = "STRATEGY_SHIFT" if out["isRush"] else None
    out["specialRequirements"] = str(out.get("specialRequirements") or "").strip()
    out["reviewNote"] = str(out.get("reviewNote") or "").strip()
    return out


def confirmation_for_order_action(world: World, action: str, payload: dict[str, Any]) -> tuple[str, list[str]]:
    """生成订单 P2 确认卡标题与影响摘要。"""
    if action == "order.upsert":
        p = normalize_order_payload(world, payload)
        verb = "编辑" if p.get("id") else "新增"
        title = f"{verb}销售订单"
        lines = [
            f"客户：{p['customerName']}（{p['customerLevel']}）",
            f"产品：{p['productName']} × {p['quantity']} {p['unit']}，交期 {p['deliveryDate']}",
            "批准后写入主干订单池，并影响后续新排产版本（P2）",
        ]
        return title, lines
    if action == "order.clear":
        n = len(world.get("salesOrders", []))
        po = len(world.get("purchaseOrders", []))
        os = len(world.get("outsourceOrders", []))
        if n == 0 and po == 0 and os == 0:
            raise ValueError("订单池已空，无需清理")
        return "一键清理全部订单", [
            f"将清空销售订单 {n} 条",
            f"同步清空采购建议 {po} / 委外建议 {os} 条",
            "历史排产版本与工单保留不回写；后续试排将无订单可排",
            "执行前自动建档，可回滚（P2）",
        ]
    if action == "order.approve":
        ids = _resolve_order_ids(world, payload)
        if not ids:
            raise ValueError("没有可批准的订单（需 SUBMITTED/CHANGED）")
        nos = [find_order(world, order_id=i)["orderNo"] for i in ids]  # type: ignore[index]
        return f"批准订单 {len(ids)} 条", [
            "、".join(nos[:5]) + ("…" if len(nos) > 5 else ""),
            "批准后状态 → APPROVED，可进入正式排产",
            "执行前自动建档，可回滚（P2）",
        ]
    if action == "order.reject":
        ids = _resolve_order_ids(world, payload, for_reject=True)
        if not ids:
            raise ValueError("没有可驳回的订单（需 SUBMITTED/CHANGED）")
        note = str(payload.get("reviewNote") or "").strip() or "（未填写原因）"
        nos = [find_order(world, order_id=i)["orderNo"] for i in ids]  # type: ignore[index]
        return f"驳回订单 {len(ids)} 条", [
            "、".join(nos[:5]) + ("…" if len(nos) > 5 else ""),
            f"驳回原因：{note}",
            "驳回后状态 → REJECTED，不参与排产；可修改后重新提交",
            "执行前自动建档，可回滚（P2）",
        ]
    order = find_order(world, order_id=int(payload.get("id") or 0), order_no=payload.get("orderNo"))
    if order is None:
        raise ValueError("目标订单不存在")
    if action == "order.cancel":
        return f"取消订单 {order['orderNo']}", [
            f"客户：{order['customerName']}，当前状态 {order['status']}",
            "批准后该订单不再参与后续排产，历史版本不回写",
            "执行前自动建档，可回滚",
        ]
    if action == "order.complete":
        return f"完成订单 {order['orderNo']}", [
            f"客户：{order['customerName']}，当前状态 {order['status']}",
            "批准后订单及明细置为 COMPLETED，不再参与后续排产",
            "执行前自动建档，可回滚",
        ]
    if action == "order.delete":
        draft_po = sum(1 for p in world.get("purchaseOrders", [])
                       if p.get("salesOrderId") == order["id"] and p.get("status") == "DRAFT")
        draft_os = sum(1 for o in world.get("outsourceOrders", [])
                       if o.get("salesOrderId") == order["id"] and o.get("status") == "DRAFT")
        hist = sum(1 for po in world.get("productionOrders", []) if po.get("salesOrderId") == order["id"])
        lines = [
            f"客户：{order['customerName']} · {order['orderNo']}（{order['status']}）",
            "批准后从订单池物理删除，后续排产不再纳入",
        ]
        if draft_po or draft_os:
            lines.append(f"同步清除草稿采购 {draft_po} / 委外 {draft_os} 条")
        if hist:
            lines.append(f"历史生产订单 {hist} 条保留不回写（仅断联销售单）")
        lines.append("执行前自动建档，可回滚")
        return f"删除订单 {order['orderNo']}", lines
    raise ValueError(f"不支持的订单动作：{action}")


def _resolve_order_ids(world: World, payload: dict[str, Any], *, for_reject: bool = False) -> list[int]:
    """解析单笔/批量订单 ID，并过滤到可审核状态。"""
    allowed = REVIEWABLE_STATUSES
    raw_ids = payload.get("orderIds") or payload.get("ids") or []
    ids: list[int] = []
    if raw_ids == "pending" or raw_ids == ["pending"]:
        return [so["id"] for so in world.get("salesOrders", []) if so.get("status") in allowed]
    if isinstance(raw_ids, list) and raw_ids:
        ids = [int(x) for x in raw_ids]
    elif payload.get("id"):
        ids = [int(payload["id"])]
    elif payload.get("orderNo"):
        o = find_order(world, order_no=str(payload["orderNo"]))
        if o:
            ids = [o["id"]]
    out = []
    for oid in ids:
        o = find_order(world, order_id=oid)
        if o and o["status"] in allowed:
            out.append(oid)
    return out


def apply_order_action(world: World, next_id, action: str, payload: dict[str, Any]) -> dict[str, Any]:
    """应用订单写入动作到内存世界（P2 动作的业务侧实现；调用方负责门禁/快照/审计/落盘）。"""
    if action == "order.clear":
        n = len(world.get("salesOrders", []))
        po_n = len(world.get("purchaseOrders", []))
        os_n = len(world.get("outsourceOrders", []))
        world["salesOrders"] = []
        world["purchaseOrders"] = []
        world["outsourceOrders"] = []
        return {
            "order": {"id": 0, "orderNo": "ALL", "status": "CLEARED"},
            "created": False, "beforeStatus": None,
            "clearedOrders": n, "clearedPurchase": po_n, "clearedOutsource": os_n,
        }
    if action == "order.upsert":
        p = normalize_order_payload(world, payload)
        if p.get("id"):
            order = find_order(world, order_id=p["id"])
            if order is None:
                raise ValueError("目标订单不存在")
            before_status = order["status"]
            # 已批准订单被改内容 → CHANGED，需重新审核（除非显式仍写 APPROVED 且字段未变）
            next_status = p["status"]
            content_changed = any([
                order.get("customerName") != p["customerName"],
                order.get("customerLevel") != p["customerLevel"],
                order.get("deliveryDate") != p["deliveryDate"],
                order.get("priority") != p["priority"],
                (order.get("items") or [{}])[0].get("productId") != p["productId"],
                (order.get("items") or [{}])[0].get("quantity") != p["quantity"],
                bool(order.get("isRush")) != bool(p["isRush"]),
            ])
            if before_status in SCHEDULABLE_STATUSES and content_changed and next_status in SCHEDULABLE_STATUSES:
                next_status = "CHANGED"
            order.update({
                "customerName": p["customerName"],
                "customerLevel": p["customerLevel"],
                "deliveryDate": p["deliveryDate"],
                "priority": p["priority"],
                "status": next_status,
                "isRush": p["isRush"],
                "rushStrategy": p["rushStrategy"],
                "specialRequirements": p["specialRequirements"],
                "updatedAt": _now(),
            })
            if next_status != before_status:
                order.setdefault("changes", []).append({
                    "at": _now(), "action": "order.upsert",
                    "from": before_status, "to": next_status,
                })
            if not order.get("items"):
                order["items"] = []
            item = order["items"][0] if order["items"] else None
            if item is None:
                item = {"id": _next_item_id(world), "orderId": order["id"], "lineNo": 1}
                order["items"].append(item)
            item.update({
                "productId": p["productId"],
                "productName": p["productName"],
                "productCode": p["productCode"],
                "quantity": p["quantity"],
                "unit": p["unit"],
                "bomVersion": item.get("bomVersion", "V1.0"),
                "routingVersion": item.get("routingVersion", "V1.0"),
                "status": "COMPLETED" if next_status == "COMPLETED"
                          else "CANCELLED" if next_status == "CANCELLED"
                          else "PENDING",
                "note": item.get("note", ""),
            })
            return {"order": order, "created": False, "beforeStatus": before_status}
        order_id = next_id("salesOrder")
        order_date = today0().strftime("%Y-%m-%d")
        product = _product(world, p["productId"])
        order = {
            "id": order_id,
            "orderNo": "SO" + today0().strftime("%Y%m%d") + f"{order_id:03d}",
            "customerId": f"CUST{order_id:03d}",
            "customerName": p["customerName"],
            "customerLevel": p["customerLevel"],
            "orderDate": order_date,
            "deliveryDate": p["deliveryDate"],
            "priority": p["priority"],
            "manualPriority": None,
            "status": p["status"],
            "source": "MANUAL",
            "specialRequirements": p["specialRequirements"],
            "totalAmount": p["quantity"] * 100,
            "isRush": p["isRush"],
            "rushStrategy": p["rushStrategy"],
            "changes": [],
            "createdBy": "planner",
            "createdAt": _now(),
            "updatedAt": _now(),
            "items": [{
                "id": _next_item_id(world),
                "orderId": order_id,
                "lineNo": 1,
                "productId": product["id"],
                "productName": product["name"],
                "productCode": product["code"],
                "quantity": p["quantity"],
                "unit": product["unit"],
                "bomVersion": "V1.0",
                "routingVersion": "V1.0",
                "status": "PENDING",
                "note": "",
            }],
        }
        world["salesOrders"].append(order)
        return {"order": order, "created": True, "beforeStatus": None}

    # 批准/驳回支持 orderIds / pending，须在单笔 id 查找之前
    if action == "order.approve":
        ids = _resolve_order_ids(world, payload)
        if not ids:
            raise ValueError("没有可批准的订单")
        updated = []
        for oid in ids:
            o = find_order(world, order_id=oid)
            if not o:
                continue
            before = o["status"]
            o["status"] = "APPROVED"
            o["reviewNote"] = str(payload.get("reviewNote") or "").strip()
            o["updatedAt"] = _now()
            o.setdefault("changes", []).append({
                "at": _now(), "action": "order.approve", "from": before, "to": "APPROVED",
            })
            updated.append(o)
        first = updated[0]
        return {
            "order": first, "created": False,
            "beforeStatus": first.get("changes", [{}])[-1].get("from"),
            "approvedCount": len(updated),
            "orderNos": [o["orderNo"] for o in updated],
        }
    if action == "order.reject":
        ids = _resolve_order_ids(world, payload, for_reject=True)
        if not ids:
            raise ValueError("没有可驳回的订单")
        note = str(payload.get("reviewNote") or payload.get("reason") or "").strip()
        updated = []
        for oid in ids:
            o = find_order(world, order_id=oid)
            if not o:
                continue
            before = o["status"]
            o["status"] = "REJECTED"
            o["reviewNote"] = note or "已驳回"
            o["updatedAt"] = _now()
            o.setdefault("changes", []).append({
                "at": _now(), "action": "order.reject", "from": before, "to": "REJECTED",
                "note": note,
            })
            updated.append(o)
        first = updated[0]
        return {
            "order": first, "created": False, "beforeStatus": "SUBMITTED",
            "rejectedCount": len(updated),
            "orderNos": [o["orderNo"] for o in updated],
        }

    order = find_order(world, order_id=int(payload.get("id") or 0), order_no=payload.get("orderNo"))
    if order is None:
        raise ValueError("目标订单不存在")
    before_status = order["status"]
    if action == "order.delete":
        oid = order["id"]
        order_no = order["orderNo"]
        # 清除该单关联的草稿 MRP；已下达建议保留但断开关联语义由业务自行处理
        world["purchaseOrders"] = [
            p for p in world.get("purchaseOrders", [])
            if not (p.get("salesOrderId") == oid and p.get("status") == "DRAFT")
        ]
        world["outsourceOrders"] = [
            o for o in world.get("outsourceOrders", [])
            if not (o.get("salesOrderId") == oid and o.get("status") == "DRAFT")
        ]
        world["salesOrders"] = [so for so in world["salesOrders"] if so["id"] != oid]
        return {"order": {"id": oid, "orderNo": order_no, "status": "DELETED"},
                "created": False, "beforeStatus": before_status}
    if action == "order.cancel":
        order["status"] = "CANCELLED"
        for item in order.get("items", []):
            item["status"] = "CANCELLED"
    elif action == "order.complete":
        order["status"] = "COMPLETED"
        for item in order.get("items", []):
            item["status"] = "COMPLETED"
    else:
        raise ValueError(f"不支持的订单动作：{action}")
    order["updatedAt"] = _now()
    order.setdefault("changes", []).append({
        "at": _now(),
        "action": action,
        "from": before_status,
        "to": order["status"],
    })
    return {"order": order, "created": False, "beforeStatus": before_status}


def apply_order_submit(world: World, payload: dict[str, Any]) -> dict[str, Any]:
    """提交审核（P1）：DRAFT/REJECTED/CHANGED → SUBMITTED。"""
    order = find_order(world, order_id=int(payload.get("id") or 0), order_no=payload.get("orderNo"))
    if order is None:
        raise ValueError("目标订单不存在")
    before = order["status"]
    if before not in SUBMITTABLE_STATUSES:
        raise ValueError(f"订单 {order['orderNo']} 状态为 {before}，不能提交审核")
    order["status"] = "SUBMITTED"
    order["reviewNote"] = ""
    order["updatedAt"] = _now()
    order.setdefault("changes", []).append({
        "at": _now(), "action": "order.submit", "from": before, "to": "SUBMITTED",
    })
    return {"order": order, "created": False, "beforeStatus": before}