"""CRM 列头 facet：从 column_filter_kwargs 中清除当前列自身条件。"""
from __future__ import annotations

import re
from typing import Any, Dict, Mapping, MutableMapping, Optional, Sequence


# field(prop/API) → column_filter_kwargs 中应清空的 snake 键
CRM_FACET_FIELD_KWARG_KEYS: Dict[str, Sequence[str]] = {
    # customer
    "customerNo": ("customer_no", "customer_no_in"),
    "customerName": ("customer_name", "customer_name_in"),
    "shortName": ("short_name", "short_name_in"),
    # product
    "productNo": ("product_no", "product_no_in"),
    "productName": ("product_name", "product_name_in"),
    "categoryName": ("category_name", "category_name_in"),
    "brands": ("brands", "brands_in", "brand", "brand_in"),
    "aliases": ("aliases", "aliases_in", "alias", "alias_in"),
    "model": ("model", "model_in"),
    # clue
    "clueName": ("clue_name", "clue_name_in"),
    "company": ("company", "company_in"),
    # opportunity
    "opportunityNo": ("opportunity_no", "opportunity_no_in"),
    "opportunityName": ("opportunity_name", "opportunity_name_in"),
    # quote / contract share customerName
    "quoteNo": ("quote_no", "quote_no_in"),
    "contractNo": ("contract_no", "contract_no_in"),
    "contractName": ("contract_name", "contract_name_in"),
    "templateNo": ("template_no", "template_no_in"),
    "templateName": ("template_name", "template_name_in"),
    # supplier / price letter
    "supplierCode": ("supplier_code", "supplier_code_in"),
    "supplierName": ("supplier_name", "supplier_name_in"),
}


_META_KEYS = frozenset(
    {
        "field",
        "keyword",
        "limit",
        "page",
        "pageSize",
        "page_size",
        "pageNum",
        "page_num",
        "ids",
        "columns",
        "sortField",
        "sort_field",
        "sortOrder",
        "sort_order",
    }
)


def _camel_to_snake(name: str) -> str:
    s1 = re.sub("(.)([A-Z][a-z]+)", r"\1_\2", name)
    return re.sub("([a-z0-9])([A-Z])", r"\1_\2", s1).lower()


def clear_facet_field_kwargs(
    kwargs: Mapping[str, object],
    field: str,
    *,
    extra_keys: Optional[Sequence[str]] = None,
) -> Dict[str, object]:
    """返回清除当前 facet 列相关键后的 kwargs 副本（值置 None）。"""
    out: Dict[str, object] = dict(kwargs)
    keys = list(CRM_FACET_FIELD_KWARG_KEYS.get(str(field or "").strip(), ()))
    if extra_keys:
        keys.extend(extra_keys)
    for key in keys:
        if key in out:
            out[key] = None
    return out


def strip_crm_facet_body_params(
    params: MutableMapping[str, object], field: str
) -> Dict[str, object]:
    """从原始 camelCase body dump 中去掉本列键与元数据（兼容无 mixin 路径）。"""
    from app.services.pl.facet_context import strip_simple_facet_self_params

    return strip_simple_facet_self_params(params, field)


def facet_filter_kwargs_from_body(body: Any, field: str) -> Dict[str, object]:
    """从 Facet Body（含 extra=allow）提取 snake_case 列筛 kwargs，并清除当前列。"""
    dumped = body.model_dump(
        by_alias=False,
        exclude_none=False,
        exclude={"field", "keyword", "limit"},
    )
    out: Dict[str, object] = {}
    for key, value in dumped.items():
        if key in _META_KEYS or value is None or value == "":
            continue
        out[key] = value

    extra = getattr(body, "model_extra", None) or {}
    for key, value in extra.items():
        if key in _META_KEYS or value is None or value == "":
            continue
        snake = _camel_to_snake(key) if any(c.isupper() for c in key) else key
        if snake in _META_KEYS:
            continue
        out[snake] = value

    return clear_facet_field_kwargs(out, field)