# app/services/order_service.py
import uuid
from datetime import datetime
from sqlalchemy.orm import Session
from typing import List

from app.utils.redis_utils import redis_qpush
from app.core.auth import get_current_user
from app.models.user import VasUser
from app.models.order import VasOrder
from app.models.vas_task import VasTask
from app.models.product import VasProduct
from app.models.product_routing import VasProductRouting
from app.schemas.order import VasOrderCreate

class OrderService:
    
    @staticmethod
    def mark_as_admin_paid(db: Session, order: VasOrder, admin_user):
        if order.status == "paid":
            return order

        order.status = "paid"

        # 记录绕过支付的原因（非常重要）
        order.meta = order.meta or {}
        order.meta["_admin_bypass"] = {
            "enabled": True,
            "by": admin_user.id,
            "at": datetime.utcnow().isoformat(),
            "reason": "admin manual order",
        }

        db.add(order)
        db.commit()
        db.refresh(order)

        return order
    
    @staticmethod
    def create_tasks_for_order(db: Session, order: VasOrder):
        """
        为已支付订单创建任务（幂等）
        """
        if order.status != "paid":
            return []

        # ---------- 1. 查 routing ----------
        routings = (
            db.query(VasProductRouting)
            .filter(
                VasProductRouting.product_id == order.product_id,
                VasProductRouting.is_active == 1
            )
            .all()
        )

        if not routings:
            return []

        created_tasks = []

        for routing in routings:

            # ---------- 2. 幂等判断 ----------
            exists = (
                db.query(VasTask)
                .filter(
                    VasTask.order_id == order.id,
                    VasTask.routing_key == routing.routing_key,
                    VasTask.script_version == routing.script_version,
                )
                .first()
            )
            if exists:
                continue

            # ---------- 3. 创建 task ----------
            task = VasTask(
                order_id=order.id,
                routing_key=routing.routing_key,
                script_version=routing.script_version,
                priority=10,
                status="pending",
                user_inputs=order.user_inputs,
                config=routing.config,
                attempt_count=0,
                notify_count=0,
                expire_at=datetime.utcnow() + timedelta(days=7),
                created_at=datetime.utcnow(),
            )

            db.add(task)
            created_tasks.append(task)

        db.commit()

        return created_tasks
    
    @staticmethod
    def create(db: Session, data: VasOrderCreate, product: VasProduct, auth_user: VasUser):
        order_id = f"ORD-{datetime.utcnow().strftime('%Y%m%d%H%M%S')}-{uuid.uuid4().hex[:8]}"
        rec = VasOrder(id=order_id, **data.dict())
        rec.base_amount = product.price_amount
        rec.currency = product.price_currency
        rec.user_id = auth_user.id
        db.add(rec)
        db.commit()
        db.refresh(rec)
        return rec

    @staticmethod
    def get(db: Session, id: str):
        return db.query(VasOrder).filter_by(id=id).first()

    @staticmethod
    def list_by_user(db: Session, user_id: str, skip=0, limit=20) -> List[VasOrder]:
        return db.query(VasOrder).filter_by(user_id=user_id).offset(skip).limit(limit).all()