X-Financial/server/src/app/services/expense_claim_document_item_builder.py

from __future__ import annotations

import json
import re
import shutil
import uuid
from collections import defaultdict
from datetime import UTC, date, datetime, timedelta
from decimal import Decimal, InvalidOperation
from pathlib import Path
from types import SimpleNamespace
from typing import Any

from sqlalchemy import func, or_, select
from sqlalchemy import inspect as sqlalchemy_inspect
from sqlalchemy.exc import IntegrityError
from sqlalchemy.orm import Session, selectinload

from app.api.deps import CurrentUserContext
from app.core.agent_enums import AgentAssetDomain, AgentAssetStatus, AgentAssetType
from app.models.agent_asset import AgentAsset
from app.models.employee import Employee
from app.models.financial_record import ExpenseClaim, ExpenseClaimItem
from app.schemas.ontology import OntologyEntity, OntologyParseResult
from app.schemas.reimbursement import (
    ExpenseClaimItemCreate,
    ExpenseClaimItemUpdate,
    ExpenseClaimUpdate,
    TravelReimbursementCalculatorRequest,
)
from app.services.agent_asset_rule_library import AgentAssetRuleLibraryManager
from app.services.agent_asset_spreadsheet import RISK_RULES_LIBRARY
from app.services.agent_foundation import AgentFoundationService
from app.services.audit import AuditLogService
from app.services.document_intelligence import build_document_insight
from app.services.expense_claim_access_policy import ExpenseClaimAccessPolicy
from app.services.expense_claim_attachment_presentation import ExpenseClaimAttachmentPresentation
from app.services.expense_claim_attachment_storage import ExpenseClaimAttachmentStorage
from app.services.expense_claim_constants import (
    EXPENSE_TYPE_LABELS,
    MAX_DRAFT_CLAIMS_PER_USER,
    EDITABLE_CLAIM_STATUSES,
    SYSTEM_GENERATED_ITEM_TYPES,
    TRAVEL_DETAIL_ITEM_TYPES,
    TRAVEL_ALLOWANCE_TRIGGER_ITEM_TYPES,
    DOCUMENT_TYPE_ITEM_TYPE_MAP,
    DOCUMENT_TYPE_SCENE_MAP,
    DOCUMENT_FACT_ITEM_TYPES,
    ROUTE_DESCRIPTION_ITEM_TYPES,
    DOCUMENT_TRIP_DATE_LABELS,
    DOCUMENT_TRIP_DATE_REQUIREMENT_LABELS,
    DOCUMENT_TRIP_DATE_KEYS,
    DOCUMENT_GENERIC_DATE_KEYS,
    DOCUMENT_INVOICE_DATE_KEYS,
    DOCUMENT_TRIP_DATE_LABEL_TOKENS,
    DOCUMENT_GENERIC_DATE_LABEL_TOKENS,
    DOCUMENT_INVOICE_DATE_LABEL_TOKENS,
    DOCUMENT_ROUTE_FORMAT_PATTERN,
    DOCUMENT_ROUTE_TEXT_PATTERN,
    DOCUMENT_ROUTE_ORIGIN_LABELS,
    DOCUMENT_ROUTE_DESTINATION_LABELS,
    GENERIC_ATTACHMENT_BACKFILL_ITEM_TYPES,
    LOCATION_REQUIRED_EXPENSE_TYPES,
    EXPENSE_SCENE_KEYWORDS,
    EXPENSE_TYPE_ALLOWED_DOCUMENT_SCENES,
    DOCUMENT_SCENE_LABELS,
    DOCUMENT_ASSOCIATION_REVIEW_ACTIONS,
    PERSISTENT_EXPENSE_REVIEW_ACTIONS,
    RETURN_REASON_OPTIONS,
    MAX_CLAIM_NO_RETRY_ATTEMPTS,
    DOCUMENT_DATE_PATTERN,
    SYSTEM_GENERATED_REASON_PREFIXES,
    LEADING_REASON_TIME_PATTERNS,
    AI_REVIEW_LOOKBACK_DAYS,
    AI_REVIEW_REPEAT_RISK_WARNING_COUNT,
    AI_REVIEW_REPEAT_RISK_BLOCK_COUNT,
    TRAVEL_REVIEW_RELEVANT_EXPENSE_TYPES,
    TRAVEL_REVIEW_LONG_DISTANCE_DOCUMENT_TYPES,
    TRAVEL_POLICY_CITY_TIERS,
    TRAVEL_POLICY_CITY_MATCH_ORDER,
    TRAVEL_POLICY_BAND_LABELS,
    TRAVEL_POLICY_HOTEL_LIMITS,
    TRAVEL_POLICY_ALLOWED_TRANSPORT_LEVELS,
    TRAVEL_POLICY_ROUTE_EXCEPTION_KEYWORDS,
    TRAVEL_POLICY_STANDARD_EXCEPTION_KEYWORDS,
    TRAVEL_POLICY_FLIGHT_CLASS_PATTERNS,
    TRAVEL_POLICY_TRAIN_CLASS_PATTERNS,
    TRAVEL_POLICY_HOTEL_NIGHT_PATTERN,
)
from app.services.expense_claim_risk_review import ExpenseClaimRiskReviewMixin
from app.services.expense_amounts import (
    extract_amount_candidates,
    format_decimal_amount,
    is_amount_match_date_fragment,
    is_date_like_amount_candidate,
    is_probable_year_amount,
    parse_document_amount_value,
    parse_plain_document_amount_value,
    resolve_document_field_amount,
    resolve_document_item_amount,
    resolve_document_text_amount,
)
from app.services.expense_rule_runtime import (
    DEFAULT_SCENE_RULE_ASSET_CODE,
    ExpenseRuleRuntimeService,
    RuntimeTravelPolicy,
    build_default_expense_rule_catalog,
    resolve_document_type_label,
)
from app.services.ocr import OcrService


class ExpenseClaimDocumentItemBuilderMixin:
    def _resolve_context_documents(self, context_json: dict[str, Any]) -> list[dict[str, Any]]:
        documents = context_json.get("ocr_documents")
        if not isinstance(documents, list):
            documents = []

        normalized: list[dict[str, Any]] = []
        for index, item in enumerate(documents[:10], start=1):
            if not isinstance(item, dict):
                continue
            normalized.append(
                {
                    "index": index,
                    "filename": str(item.get("filename") or "").strip(),
                    "summary": str(item.get("summary") or "").strip(),
                    "text": str(item.get("text") or "").strip(),
                    "document_type": str(item.get("document_type") or "").strip(),
                    "scene_code": str(item.get("scene_code") or "").strip(),
                    "scene_label": str(item.get("scene_label") or "").strip(),
                    "document_fields": self._normalize_document_fields(item.get("document_fields")),
                }
            )

        overrides = context_json.get("review_document_form_values")
        if not isinstance(overrides, list) or not normalized:
            return normalized

        override_map: dict[tuple[int, str], dict[str, Any]] = {}
        for item in overrides:
            if not isinstance(item, dict):
                continue
            filename = str(item.get("filename") or "").strip()
            index = int(item.get("index") or 0)
            if not filename and index <= 0:
                continue
            override_map[(index, filename)] = item

        for item in normalized:
            override = override_map.get((int(item["index"]), str(item["filename"])))
            if override is None:
                override = override_map.get((int(item["index"]), ""))
            if override is None:
                continue
            summary = str(override.get("summary") or "").strip()
            scene_label = str(override.get("scene_label") or "").strip()
            fields = override.get("fields")
            if summary:
                item["summary"] = summary
            if scene_label:
                item["scene_label"] = scene_label
            if isinstance(fields, list):
                item["document_fields"] = self._normalize_document_fields(fields)

        return normalized

    @staticmethod
    def _normalize_document_fields(raw_fields: Any) -> list[dict[str, str]]:
        if not isinstance(raw_fields, list):
            return []
        normalized: list[dict[str, str]] = []
        for field in raw_fields:
            if not isinstance(field, dict):
                continue
            label = str(field.get("label") or "").strip()
            value = str(field.get("value") or "").strip()
            key = str(field.get("key") or label or "").strip()
            if not label or not value:
                continue
            normalized.append(
                {
                    "key": key,
                    "label": label,
                    "value": value,
                }
            )
        return normalized

    def _build_context_item_specs(
        self,
        *,
        context_documents: list[dict[str, Any]],
        attachment_names: list[str],
        occurred_at: datetime,
        expense_type: str,
        amount: Decimal,
        reason: str,
        location: str,
        context_json: dict[str, Any],
        employee_grade: str | None = None,
        user_id: str = "",
    ) -> list[dict[str, Any]]:
        specs: list[dict[str, Any]] = []
        if context_documents:
            for document in context_documents:
                specs.append(
                    {
                        "item_date": self._resolve_document_item_date(document, fallback=occurred_at.date()),
                        "item_type": self._resolve_document_item_type(document, fallback=expense_type),
                        "item_reason": self._resolve_document_item_reason(document, fallback=reason),
                        "item_location": location,
                        "item_amount": self._resolve_document_item_amount(document),
                        "invoice_id": str(document.get("filename") or "").strip() or None,
                    }
                )
        elif attachment_names:
            for attachment_name in attachment_names:
                specs.append(
                    {
                        "item_date": occurred_at.date(),
                        "item_type": expense_type,
                        "item_reason": reason,
                        "item_location": location,
                        "item_amount": None,
                        "invoice_id": attachment_name,
                    }
                )

        if not specs:
            return []

        total_recognized = sum(
            spec["item_amount"] for spec in specs if isinstance(spec.get("item_amount"), Decimal)
        )
        missing_specs = [spec for spec in specs if spec.get("item_amount") is None]
        if missing_specs:
            remaining = (amount - total_recognized).quantize(Decimal("0.01"))
            if remaining > Decimal("0.00"):
                missing_specs[0]["item_amount"] = remaining

        for spec in specs:
            if spec.get("item_amount") is None:
                spec["item_amount"] = Decimal("0.00")

        allowance_spec = self._build_travel_allowance_item_spec(
            context_documents=context_documents,
            specs=specs,
            occurred_at=occurred_at,
            expense_type=expense_type,
            location=location,
            context_json=context_json,
            employee_grade=employee_grade,
            user_id=user_id,
        )
        if allowance_spec is not None:
            specs = [spec for spec in specs if str(spec.get("item_type") or "").strip() != "travel_allowance"]
            specs.append(allowance_spec)

        return specs

    def _build_travel_allowance_item_spec(
        self,
        *,
        context_documents: list[dict[str, Any]],
        specs: list[dict[str, Any]],
        occurred_at: datetime,
        expense_type: str,
        location: str,
        context_json: dict[str, Any],
        employee_grade: str | None,
        user_id: str,
    ) -> dict[str, Any] | None:
        if not self._should_add_travel_allowance_item(
            expense_type=expense_type,
            context_documents=context_documents,
            context_json=context_json,
        ):
            return None

        grade = str(employee_grade or context_json.get("grade") or "").strip()
        if not grade:
            return None

        days, _, end_date = self._resolve_travel_allowance_days(
            context_json=context_json,
            occurred_at=occurred_at,
        )
        allowance_location = self._resolve_travel_allowance_location(
            location=location,
            context_documents=context_documents,
        )
        if days < 1 or not allowance_location:
            return None

        try:
            from app.services.travel_reimbursement_calculator import (
                TravelReimbursementCalculatorService,
            )

            result = TravelReimbursementCalculatorService(self.db).calculate(
                TravelReimbursementCalculatorRequest(
                    days=days,
                    location=allowance_location,
                    grade=grade,
                ),
                CurrentUserContext(
                    username=user_id,
                    name="",
                    role_codes=[],
                    is_admin=False,
                ),
            )
        except ValueError:
            return None

        allowance_amount = Decimal(result.allowance_amount or Decimal("0.00")).quantize(Decimal("0.01"))
        allowance_rate = Decimal(result.total_allowance_rate or Decimal("0.00")).quantize(Decimal("0.01"))
        if allowance_amount <= Decimal("0.00") or allowance_rate <= Decimal("0.00"):
            return None

        return {
            "item_date": end_date,
            "item_type": "travel_allowance",
            "item_reason": (
                f"系统自动计算出差补贴：{result.matched_city}，{days}天，"
                f"{allowance_rate:.2f}元/天"
            ),
            "item_location": str(result.allowance_region or allowance_location).strip(),
            "item_amount": allowance_amount,
            "invoice_id": None,
        }

    @staticmethod
    def _should_add_travel_allowance_item(
        *,
        expense_type: str,
        context_documents: list[dict[str, Any]],
        context_json: dict[str, Any],
    ) -> bool:
        normalized_expense_type = str(expense_type or "").strip().lower()
        if normalized_expense_type == "travel":
            return True

        review_form_values = context_json.get("review_form_values")
        if isinstance(review_form_values, dict):
            review_type = str(
                review_form_values.get("expense_type")
                or review_form_values.get("scene_label")
                or review_form_values.get("reason_value")
                or ""
            )
            if any(keyword in review_type for keyword in ("差旅", "出差")):
                return True

        for document in context_documents:
            document_type = str(document.get("document_type") or "").strip()
            scene_code = str(document.get("scene_code") or "").strip()
            if document_type in {"train_ticket", "flight_itinerary"} or scene_code == "travel":
                return True
        return False

    def _resolve_travel_allowance_days(
        self,
        *,
        context_json: dict[str, Any],
        occurred_at: datetime,
    ) -> tuple[int, date, date]:
        start_date = occurred_at.date()
        end_date = start_date
        explicit_days = self._extract_travel_allowance_days_from_context(context_json)

        business_time_context = context_json.get("business_time_context")
        if isinstance(business_time_context, dict):
            start_date = self._parse_iso_date_or_default(business_time_context.get("start_date"), start_date)
            end_date = self._parse_iso_date_or_default(business_time_context.get("end_date"), start_date)
        else:
            review_form_values = context_json.get("review_form_values")
            if isinstance(review_form_values, dict):
                time_text = str(
                    review_form_values.get("time_range")
                    or review_form_values.get("business_time")
                    or review_form_values.get("occurred_date")
                    or ""
                ).strip()
                matched_dates = re.findall(r"\d{4}-\d{2}-\d{2}", time_text)
                if matched_dates:
                    start_date = self._parse_iso_date_or_default(matched_dates[0], start_date)
                    end_date = self._parse_iso_date_or_default(matched_dates[-1], start_date)

        if end_date < start_date:
            end_date = start_date
        if explicit_days > 0:
            return explicit_days, start_date, start_date + timedelta(days=explicit_days - 1)
        days = (end_date - start_date).days + 1
        return max(1, days), start_date, end_date

    @staticmethod
    def _extract_travel_allowance_days_from_context(context_json: dict[str, Any]) -> int:
        review_form_values = context_json.get("review_form_values")
        text_parts: list[str] = []
        if isinstance(review_form_values, dict):
            text_parts.extend(
                str(review_form_values.get(key) or "")
                for key in (
                    "reason",
                    "business_reason",
                    "reason_value",
                    "scene_label",
                    "time_range",
                    "business_time",
                )
            )
        text_parts.extend(
            str(context_json.get(key) or "")
            for key in ("user_input_text", "message", "raw_text", "ocr_summary")
        )
        return ExpenseClaimDocumentItemBuilderMixin._extract_travel_day_count(" ".join(text_parts))

    @staticmethod
    def _extract_travel_day_count(text: str) -> int:
        normalized = str(text or "").replace(" ", "")
        if not normalized:
            return 0
        patterns = (
            r"(?:出差|差旅|行程|支撑|支持|部署|项目|业务)\D{0,12}?(\d{1,2})天",
            r"(\d{1,2})天(?:出差|差旅|行程)",
        )
        for pattern in patterns:
            match = re.search(pattern, normalized)
            if not match:
                continue
            try:
                return max(1, int(match.group(1)))
            except ValueError:
                continue
        return 0

    @staticmethod
    def _parse_iso_date_or_default(value: Any, fallback: date) -> date:
        try:
            return date.fromisoformat(str(value or "").strip())
        except ValueError:
            return fallback

    @staticmethod
    def _resolve_travel_allowance_location(
        *,
        location: str,
        context_documents: list[dict[str, Any]],
    ) -> str:
        normalized_location = str(location or "").strip()
        if normalized_location and normalized_location not in {"待补充", "未知", "暂无"}:
            return normalized_location

        for document in context_documents:
            for field in list(document.get("document_fields") or []):
                if not isinstance(field, dict):
                    continue
                key = str(field.get("key") or "").strip().lower()
                label = str(field.get("label") or "").strip()
                value = str(field.get("value") or "").strip()
                if key == "route" or "行程" in label:
                    separators = ("-", "至", "→", "->")
                    for separator in separators:
                        if separator in value:
                            return value.split(separator)[-1].strip()
                if key in {"destination", "arrival_city"} or label in {"目的地", "到达城市"}:
                    return value
        return ""

    def _collect_invoice_keys_from_incoming_document(self, document: dict[str, Any]) -> list[str]:
        document_info = dict(document or {})
        if "fields" not in document_info and isinstance(document_info.get("document_fields"), list):
            document_info["fields"] = document_info.get("document_fields")
        return self._collect_invoice_keys_from_document_info(document_info)

    def _resolve_document_item_type(self, document: dict[str, Any], *, fallback: str) -> str:
        document_type = str(document.get("document_type") or "").strip()
        mapped_type = DOCUMENT_TYPE_ITEM_TYPE_MAP.get(document_type)
        if mapped_type:
            return mapped_type

        scene_code = str(document.get("scene_code") or "").strip()
        if scene_code in {"travel", "hotel", "transport", "meal", "office", "meeting", "training"}:
            return scene_code

        if document_type in {"flight_itinerary", "train_ticket"}:
            return "travel"
        if document_type in {"taxi_receipt", "parking_toll_receipt", "transport_receipt"}:
            return "transport"
        if document_type == "hotel_invoice":
            return "hotel"
        if document_type == "meal_receipt":
            return "meal"
        if document_type == "office_invoice":
            return "office"
        if document_type == "meeting_invoice":
            return "meeting"
        if document_type == "training_invoice":
            return "training"

        scene_label = str(document.get("scene_label") or "").strip()
        if "交通" in scene_label:
            return "transport"
        if "住宿" in scene_label:
            return "hotel"
        if "餐" in scene_label:
            return "meal"
        if "会务" in scene_label or "会议" in scene_label:
            return "meeting"
        if "培训" in scene_label:
            return "training"
        return fallback or "other"

    def _resolve_document_item_reason(self, document: dict[str, Any], *, fallback: str) -> str:
        document_type = str(document.get("document_type") or "").strip().lower()
        item_type = self._resolve_document_item_type(document, fallback="")

        if document_type in {"train_ticket", "flight_itinerary"} or item_type in {"train_ticket", "flight_ticket"}:
            route = self._resolve_document_route_value(document)
            trip_no = self._resolve_document_fact_field(
                document,
                keys={"trip_no", "flight_no", "train_no"},
                labels={"车次", "航班"},
            )
            if route and trip_no:
                return f"{self._format_document_route(route)}（{trip_no}）"
            if route:
                return self._format_document_route(route)

        if document_type in {"taxi_receipt", "transport_receipt"} or item_type == "ride_ticket":
            route = self._resolve_document_route_value(document)
            if route:
                return self._format_document_route(route)

        if document_type == "hotel_invoice" or item_type == "hotel_ticket":
            merchant = self._resolve_document_fact_field(
                document,
                keys={"merchant_name", "merchant", "seller_name", "vendor_name", "hotel_name"},
                labels={"商户", "酒店", "宾馆", "销售方", "开票方"},
            )
            stay_range = self._resolve_document_stay_range(document)
            if merchant and stay_range:
                return f"{merchant}，{stay_range}"
            if merchant:
                return merchant
            if stay_range:
                return stay_range

        merchant = self._resolve_document_fact_field(
            document,
            keys={"merchant_name", "merchant", "seller_name", "vendor_name"},
            labels={"商户", "销售方", "开票方", "收款方"},
        )
        if merchant:
            return merchant

        summary = str(document.get("summary") or "").strip()
        return summary or fallback or ""