from fastapi import APIRouter

from app.api.deps import CurrentUser, DbSession
from app.repositories import order as crud_order
from app.repositories import savings as crud_savings
from app.schemas.order import (
    OrderListItem,
    OrderListOut,
    OrderReportOut,
    OrderReportRequest,
)

router = APIRouter(prefix="/api/v1/order", tags=["order"])


@router.post(
    "/report",
    response_model=OrderReportOut,
    summary="上报归因订单(比价后5分钟内点链接 + 支付金额与比价价相差≤1元)",
)
def report_order(req: OrderReportRequest, user: CurrentUser, db: DbSession) -> OrderReportOut:
    # 记账唯一真相表是 savings_record(source='compare');order_record 已降级,不再写入。
    rec, duplicated = crud_savings.create_from_report(db, user.id, req)
    return OrderReportOut(
        id=rec.id,
        platform=rec.platform or req.platform,
        pay_channel=rec.pay_channel or req.pay_channel,
        compared_price_cents=rec.compared_price_cents or 0,
        paid_amount_cents=rec.order_amount_cents,
        duplicated=duplicated,
    )


@router.get(
    "/list",
    response_model=OrderListOut,
    summary="当前用户的归因订单明细(按时间倒序)",
)
def list_orders(user: CurrentUser, db: DbSession, limit: int = 100) -> OrderListOut:
    rows, total = crud_order.list_orders(db, user.id, limit=limit)
    items = [
        OrderListItem(
            id=r.id,
            platform=r.platform,
            pay_channel=r.pay_channel,
            compared_price_cents=r.compared_price_cents,
            paid_amount_cents=r.paid_amount_cents,
            saved_cents=max(0, r.compared_price_cents - r.paid_amount_cents),
            created_at=r.created_at,
        )
        for r in rows
    ]
    return OrderListOut(items=items, total=total)