# 接口 2：从表 2 取未推行，组装文档报文。
#
# 同一 omsId 的加购行必须在同一批 data 里。一批上限默认 500，可用
# OMS_OUTBOUND_BATCH_LIMIT 覆盖。不改 push_status，不向订单中心发 HTTP。

from __future__ import annotations

from collections import OrderedDict

from ..parse import as_int, money4
from .limits import MAX_BATCH, batch_limit

__all__ = [
    "MAX_BATCH",
    "batch_limit",
    "build_cart_settlement_envelope",
    "load_cart_settlement_envelope",
]


# 从仓库取未推行并组装信封。未传 limit 时读环境变量。
def load_cart_settlement_envelope(repo, limit: int | None = None) -> dict:
    cap = batch_limit() if limit is None else limit
    return build_cart_settlement_envelope(repo.list_unpushed(limit=cap), limit=cap)


# 把已取出的行按 omsId 整组截到 limit，再转文档字段。
def build_cart_settlement_envelope(rows: list[dict], limit: int = MAX_BATCH) -> dict:
    chosen = _take_complete_groups(rows, limit)
    return {"data": [_to_item(row) for row in chosen]}


# 按 oms_id 保序成组；装不下的整组留下。空批时超限组仍进入。
def _take_complete_groups(rows: list[dict], limit: int) -> list[dict]:
    groups: OrderedDict = OrderedDict()
    for row in rows:
        groups.setdefault(row["oms_id"], []).append(row)
    batch: list[dict] = []
    for group in groups.values():
        if len(batch) + len(group) > limit and batch:
            break
        batch.extend(group)
    return batch


# 金额四位小数字符串。库里的 NULL 保持 null，不让一行空金额掀掉整批。
def _money4(value) -> str | None:
    if value is None:
        return None
    return money4(value)


# 把表 2 行转成接口 2 文档字段。金额四位小数字符串。
def _to_item(row: dict) -> dict:
    return {
        "fid": as_int(row["fid"]),
        "operateType": as_int(row["operate_type"]),
        "omsId": as_int(row["oms_id"]),
        "platformType": as_int(row["platform_type"]),
        "supplierName": row["supplier_name"],
        "barCode": row["bar_code"],
        "purchasePrice": _money4(row.get("purchase_price")),
        "purchaseQty": as_int(row["purchase_qty"]),
        "purchaseTotal": _money4(row.get("purchase_total")),
        "status": as_int(row["status"]) if row.get("status") is not None else None,
        "failReason": row.get("fail_reason"),
        "payOrderNo": row.get("pay_order_no"),
        "payOrderDtlId": row.get("pay_order_dtl_id"),
        "orgCode": row.get("org_code"),
    }