"""读取实际系统字典并统计带单据类型的收款关联，不推断计提口径。"""

import re
from datetime import datetime
from pathlib import Path

from sqlalchemy import text
from sqlalchemy.orm import Session

from app.core.logging import scrub
from app.services.tplus.reader import TPlusReader

_COLUMNS = {
    "source_version": ("source_version",),
    "voucher_types": ("id", "code", "name"),
    "state_enums": ("id", "code", "name", "enum_name"),
    "receipt_kinds": ("voucher_type_code", "voucher_type_name", "receive_flag", "row_count"),
    "receipt_line_kinds": ("voucher_type_id", "voucher_type_name", "receive_flag", "row_count"),
    "sales_links": (
        "row_count",
        "delivery_matches",
        "detail_matches",
        "direct_order_matches",
        "detail_order_matches",
        "unambiguous_order_matches",
        "invalid_order_ids",
        "conflicting_order_ids",
    ),
    "order_coverage": ("row_count", "without_order", "single_order", "multiple_orders"),
}
PENDING_CONFIRMATIONS = (
    ("cost_basis", "绩效成本取值", "订单最新成本或出库成本的类型、时点和含税口径需业务确认"),
    ("receipt_date", "到账日", "单据日、审核日和明细 arrivalDate 的业务含义需确认"),
    ("ship_date", "发货日", "回款天数应使用哪个发货日期需确认"),
    ("allocation", "多单分摊", "一笔收款涉及多张销货单或订单时，不能自动把整笔金额记给一单"),
    ("negative_events", "退货与红冲", "负数、冲销及已结算业务的调整方式需确认"),
)


def public_report(raw: dict | None) -> dict | None:
    """历史报告也按当前字段白名单输出，禁止透传未知嵌套数据。"""
    if not isinstance(raw, dict):
        return None
    result = {
        key: TPlusRelationshipAudit._safe_value(raw.get(key))
        for key in (
            "schema_version",
            "captured_at",
            "source_version",
            "is_target_engine",
            "relationship_status",
        )
    }
    result["compatibility_status"] = "PENDING"
    for section, columns in _COLUMNS.items():
        if section in ("source_version", "voucher_types"):
            continue
        value = raw.get(section)
        if isinstance(value, list):
            result[section] = [
                {key: TPlusRelationshipAudit._safe_value(row.get(key)) for key in columns}
                for row in value[:200]
                if isinstance(row, dict)
            ]
        elif isinstance(value, dict):
            result[section] = {
                key: TPlusRelationshipAudit._safe_value(value.get(key)) for key in columns
            }
        else:
            result[section] = None
    result["pending_confirmations"] = [
        {"key": k, "title": t, "reason": r} for k, t, r in PENDING_CONFIRMATIONS
    ]
    return result


class TPlusRelationshipAudit:
    """执行固定核验查询；结果只包含系统字典和数量，不包含客户记录。"""

    def __init__(self, session: Session, query_dir: Path | None = None) -> None:
        self.session = session
        root = query_dir or TPlusReader._default_query_dir()
        source = (root / "audit" / "queries.sql").read_text(encoding="utf-8")
        sections = re.split(r"(?m)^-- @query (\w+)\s*$", source)
        self.queries = dict(zip(sections[1::2], sections[2::2], strict=True))
        if set(self.queries) != set(_COLUMNS):
            raise ValueError("关联核验查询清单不完整")

    def fetch(self, name: str, **params) -> list[dict]:
        """只接受登记的查询名与绑定参数，过滤非合同字段。"""
        if name not in self.queries:
            raise ValueError("不支持的核验查询")
        result = self.session.execute(text(self.queries[name]), params)
        try:
            return [
                {key: self._safe_value(row.get(key)) for key in _COLUMNS[name]}
                for row in result.mappings().all()
            ]
        finally:
            result.close()

    @staticmethod
    def _safe_value(value):
        if value is None or isinstance(value, (int, bool)):
            return value
        return scrub(re.sub(r"[\x00-\x1f]", " ", str(value)))[:200]

    def run(self) -> dict:
        """生成事实报告；类型缺失或有歧义时不执行该关联链路。"""
        version = self.fetch("source_version")[0]["source_version"]
        types = self.fetch("voucher_types")
        report = {
            "schema_version": 1,
            "captured_at": datetime.now().isoformat(),
            "source_version": version,
            "is_target_engine": str(version).startswith("10.50."),
            "compatibility_status": "PENDING",
            "state_enums": self.fetch("state_enums"),
            "receipt_kinds": self.fetch("receipt_kinds"),
            "receipt_line_kinds": self.fetch("receipt_line_kinds"),
            "sales_links": None,
            "order_coverage": None,
            "relationship_status": "UNRESOLVED",
            "relationship_basis": "主表按 isReceiveFlag=1（是否收款）筛选；明细按 SM_VoucherType 的 SA04 类型关联。主表 idvouchertype 是来源类型，不能据此筛本单类型。",
            "pending_confirmations": [
                {"key": k, "title": t, "reason": r} for k, t, r in PENDING_CONFIRMATIONS
            ],
        }
        sale = [r["id"] for r in types if r["code"] == "SA04"]
        if len(sale) == 1:
            params = {"sale_delivery_type_id": sale[0], "receive_flag": 1}
            report["sales_links"] = self.fetch("sales_links", **params)[0]
            report["order_coverage"] = self.fetch("order_coverage", **params)[0]
            report["relationship_status"] = "OBSERVED"
        return report