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合同财务统计 API 层
符合三层架构规范：只做请求/响应处理，业务逻辑在 Service 层
"""
from __future__ import annotations
from typing import Any
from django.http import HttpRequest
from django.utils.dateparse import parse_date
from ninja import Router
from apps.contracts.schemas import FinanceStatsItem, FinanceStatsOut
from apps.contracts.services.payment.contract_finance_service import ContractFinanceService
router = Router()
def _get_finance_service() -> ContractFinanceService:
"""工厂函数：创建 ContractFinanceService 实例"""
return ContractFinanceService()
@router.get("/finance/stats", response=FinanceStatsOut)
def finance_stats(
request: HttpRequest,
contract_id: int | None = None,
start_date: str | None = None,
end_date: str | None = None,
) -> FinanceStatsOut:
"""
获取财务统计数据
API 层职责：
1. 接收请求参数
2. 解析日期参数
3. 调用 Service 层方法
4. 返回响应
"""
service = _get_finance_service()
# 解析日期参数
d1 = parse_date(start_date) if start_date else None
d2 = parse_date(end_date) if end_date else None
# 调用 Service 层
result = service.get_finance_stats(
contract_id=contract_id,
start_date=d1,
end_date=d2,
)
# 转换为 Schema
items = [
FinanceStatsItem(
contract_id=item["contract_id"],
total_received=item["total_received"],
total_invoiced=item["total_invoiced"],
unpaid_amount=item["unpaid_amount"],
)
for item in result["items"]
]
return FinanceStatsOut(
items=items,
total_received_all=result["total_received_all"],
total_invoiced_all=result["total_invoiced_all"],
)
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