53 lines
1.7 KiB
Python
53 lines
1.7 KiB
Python
from __future__ import annotations
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.models.llm_billing.policy import LlmBillingPolicyModel
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from app.services.llm_billing.context import LlmBillingPolicy
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async def get_llm_billing_policy(
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db: AsyncSession,
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*,
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scene_code: str | None = None,
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) -> LlmBillingPolicy:
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"""按业务场景读取固定消费积分；不再读取旧 SystemConfig 冻结/预扣配置。"""
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resolved_scene = scene_code
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if not resolved_scene:
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return LlmBillingPolicy(
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charge_credits=0.0,
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valid=False,
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error="LLM业务场景不能为空",
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)
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result = await db.execute(
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select(LlmBillingPolicyModel)
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.where(LlmBillingPolicyModel.scene_code == resolved_scene)
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.limit(1)
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)
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model = result.scalar_one_or_none()
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if model is None:
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return LlmBillingPolicy(
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charge_credits=0.0,
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valid=False,
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error=f"未配置LLM场景消费积分：{resolved_scene}",
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)
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# 数据库物理字段 pre_deduct_credits 为历史命名，本轮不迁移字段；业务语义统一为 charge_credits。
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amount = float(model.pre_deduct_credits)
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if not model.is_active or amount <= 0:
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return LlmBillingPolicy(
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charge_credits=amount,
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valid=False,
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error=f"LLM场景积分配置未启用或金额无效：{resolved_scene}",
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policy_id=model.id,
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version=model.version,
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scene_name=model.scene_name,
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)
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return LlmBillingPolicy(
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charge_credits=round(amount, 2),
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valid=True,
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policy_id=model.id,
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version=model.version,
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scene_name=model.scene_name,
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)
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