100 lines
4.0 KiB
Python
100 lines
4.0 KiB
Python
"""缴费模式切换校验（与前端 protocol-pay-mode-switch.ts 规则一致）"""
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from __future__ import annotations
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from decimal import Decimal
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from typing import Any, Dict, List, Optional
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from app.services.protocol_payment_installment import is_legacy_installment_ratios
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LOCKED_STATUSES = frozenset({"jfqrz", "yjf", "tfqrz", "ytf"})
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BLOCKING_STATUSES = frozenset({"jfqrz", "tfqrz", "ytf"})
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def _dec(v: Any) -> float:
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if v is None:
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return 0.0
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return float(Decimal(str(v)))
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def validate_payment_details_for_save(
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pay_mode: str,
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contract_amount: Optional[Any],
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installment_count: Optional[int],
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details: Optional[list],
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installment_ratios: Optional[List[float]] = None,
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installment_advance_days: Optional[int] = None,
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) -> None:
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"""保存缴费明细前的 P0 校验。"""
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rows = [dict(d) for d in (details or [])]
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contract = _dec(contract_amount)
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for r in rows:
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status = (r.get("pay_status") or r.get("payStatus") or "dfj").strip()
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if status in BLOCKING_STATUSES:
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raise ValueError("存在缴费确认中或退费处理中的明细，无法保存")
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paid_sum = sum(
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_dec(r.get("due_amount") if r.get("due_amount") is not None else r.get("dueAmount"))
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for r in rows
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if (r.get("pay_status") or r.get("payStatus")) == "yjf"
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)
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dfj_rows = [
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r
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for r in rows
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if (r.get("pay_status") or r.get("payStatus") or "dfj") == "dfj"
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]
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yjf_rows = [r for r in rows if (r.get("pay_status") or r.get("payStatus")) == "yjf"]
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if pay_mode == "dj":
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if len(dfj_rows) > 1:
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raise ValueError("趸交模式仅允许一条待缴费明细")
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remaining = round(contract - paid_sum, 2)
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if dfj_rows:
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due = _dec(
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dfj_rows[0].get("due_amount")
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if dfj_rows[0].get("due_amount") is not None
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else dfj_rows[0].get("dueAmount")
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)
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expected = remaining if yjf_rows else contract
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if abs(due - expected) > 0.015:
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raise ValueError(
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f"趸交待缴金额应为 {expected:.2f}，当前为 {due:.2f}"
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)
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elif pay_mode == "fq":
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count = int(installment_count or 0)
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if count < 1:
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raise ValueError("分期模式须填写分期期数")
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if installment_advance_days is not None and int(installment_advance_days) < 0:
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raise ValueError("应缴费提前天数不能为负数")
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if installment_ratios is not None:
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values = [float(x) for x in installment_ratios]
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if len(values) != count:
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raise ValueError("分期金额数量须与分期期数一致")
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if is_legacy_installment_ratios(values, Decimal(str(contract)) if contract else None):
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if abs(sum(values) - 100.0) > 0.01:
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raise ValueError("缴费比例之和须等于 100%")
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elif contract and abs(sum(values) - contract) > 0.015:
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raise ValueError("分期金额合计须等于合同金额")
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if len(rows) != count:
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raise ValueError(f"分期明细条数应等于分期期数（{count}）")
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fq_forbidden = frozenset({"jfqrz", "tfqrz", "ytf"})
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for r in rows:
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status = (r.get("pay_status") or r.get("payStatus") or "dfj").strip()
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if status in fq_forbidden:
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raise ValueError("分期模式下存在不可保存的缴费状态")
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total_due = sum(
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_dec(r.get("due_amount") if r.get("due_amount") is not None else r.get("dueAmount"))
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for r in rows
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)
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if contract and abs(total_due - contract) > 0.015:
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raise ValueError("分期各期应缴金额之和应等于合同金额")
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if yjf_rows:
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max_paid_no = max(
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int(r.get("installment_no") or r.get("installmentNo") or 0)
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for r in yjf_rows
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)
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if max_paid_no > count:
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raise ValueError("分期期数不能少于已缴费的最大期次")
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