deliveryman-api/app/api/endpoints/coupon_activity.py

from fastapi import APIRouter, Depends, Query
from sqlalchemy.orm import Session
from sqlalchemy import func, and_
from app.models.coupon_activity import (
    CouponActivityDB,
    CouponActivityCreate,
    CouponActivityUpdate,
    CouponActivityInfo
)
from app.models.coupon_receive_record import CouponReceiveRecordDB
from app.models.coupon import CouponDB, UserCouponDB, CouponStatus, CouponInfo
from app.models.database import get_db
from app.api.deps import get_current_user, get_admin_user
from app.models.user import UserDB
from app.core.response import success_response, error_response, ResponseModel
from typing import Optional, List
from datetime import datetime, time

router = APIRouter()

@router.post("", response_model=ResponseModel)
async def create_coupon_activity(
    activity: CouponActivityCreate,
    db: Session = Depends(get_db),
    admin: UserDB = Depends(get_admin_user)
):
    """创建优惠券活动（管理员）"""
    # 检查优惠券是否存在
    for coupon_id in activity.coupon_config.keys():
        coupon = db.query(CouponDB).filter(CouponDB.id == coupon_id).first()
        if not coupon:
            return error_response(code=404, message=f"优惠券ID {coupon_id} 不存在")
        # 检查数量是否大于0
        if activity.coupon_config[coupon_id] <= 0:
            return error_response(code=400, message=f"优惠券ID {coupon_id} 的数量必须大于0")
    
    db_activity = CouponActivityDB(**activity.model_dump())
    db.add(db_activity)
    
    try:
        db.commit()
        db.refresh(db_activity)
        return success_response(data=CouponActivityInfo.model_validate(db_activity))
    except Exception as e:
        db.rollback()
        return error_response(code=500, message=f"创建失败: {str(e)}")

@router.get("/{activity_id}", response_model=ResponseModel)
async def get_coupon_activity(
    activity_id: int,
    db: Session = Depends(get_db),
    current_user: UserDB = Depends(get_current_user)
):
    """获取优惠券活动详情"""
    activity = db.query(CouponActivityDB).filter(
        CouponActivityDB.id == activity_id
    ).first()
    
    if not activity:
        return error_response(code=404, message="活动不存在") 
        
    # 获取活动对应的优惠券
    coupons = db.query(CouponDB).filter(
        CouponDB.id.in_(activity.coupon_config.keys())
    ).all() 

    activity_data = CouponActivityInfo.model_validate(activity).model_dump()
    activity_data.update({'coupons': [CouponInfo.model_validate(coupon) for coupon in coupons]})
    
    # 检查总领取次数是否超过限制
    can_receive = True
    
    if activity.total_limit > 0:
        user_receive_count = db.query(func.count(CouponReceiveRecordDB.id)).filter(
            CouponReceiveRecordDB.activity_id == activity_id,
            CouponReceiveRecordDB.user_id == current_user.userid
        ).scalar()
        if user_receive_count >= activity.total_limit:
            can_receive = False
    
    # 检查当前是否可以领取
    current_time = datetime.now().time()
    if current_time < activity.daily_start_time or current_time > activity.daily_end_time:
        can_receive = False
    activity_data.update({'can_receive': can_receive})

    # 检查活动是否结束
    if activity.end_time < datetime.now():
        activity_data.update({'can_receive': False})
        activity_data.update({'is_end': True})
    
    return success_response(data=activity_data)


@router.get("", response_model=ResponseModel)
async def get_coupon_activities(
    is_active: Optional[bool] = None,
    skip: int = Query(0, ge=0),
    limit: int = Query(20, ge=1, le=100),
    db: Session = Depends(get_db)
):
    """获取优惠券活动列表"""
    query = db.query(CouponActivityDB)
    
    if is_active is not None:
        query = query.filter(CouponActivityDB.is_active == is_active)
    
    total = query.count()
    
    activities = query.order_by(CouponActivityDB.create_time.desc())\
        .offset(skip)\
        .limit(limit)\
        .all()

    # 查询每个活动被领取的次数
    activities_data = []
    for activity in activities:
        receive_count = db.query(func.sum(CouponReceiveRecordDB.receive_count)).filter(
            CouponReceiveRecordDB.activity_id == activity.id,
        ).scalar()
        activity_data = CouponActivityInfo.model_validate(activity).model_dump()
        activity_data.update({'receive_count': receive_count})
        activities_data.append(activity_data)
    
    return success_response(data={
        "total": total,
        "items": activities_data
    })

@router.post("/{activity_id}/receive", response_model=ResponseModel)
async def receive_coupons(
    activity_id: int,
    db: Session = Depends(get_db),
    current_user: UserDB = Depends(get_current_user)
):
    """领取优惠券"""
    # 查询活动
    activity = db.query(CouponActivityDB).filter(
        CouponActivityDB.id == activity_id,
        CouponActivityDB.is_active == True
    ).first()
    
    if not activity:
        return error_response(code=404, message="活动不存在或已结束")
    
    # 检查领取时间
    current_time = datetime.now().time()
    if current_time < activity.daily_start_time or current_time > activity.daily_end_time:
        return error_response(code=400, message="不在领取时间范围内")
    
    # 检查总领取次数
    total_receive_count = db.query(func.count(CouponReceiveRecordDB.id)).filter(
        CouponReceiveRecordDB.user_id == current_user.userid,
        CouponReceiveRecordDB.activity_id == activity_id
    ).scalar()

    if activity.total_limit > 0 and total_receive_count >= activity.total_limit:
        return error_response(code=400, message=f"您只能领取 {activity.total_limit} 次")
    
    # 检查今日领取次数
    today = datetime.now().date()
    
    today_receive_count = db.query(func.count(CouponReceiveRecordDB.id)).filter(
        CouponReceiveRecordDB.user_id == current_user.userid,
        CouponReceiveRecordDB.activity_id == activity_id,
        CouponReceiveRecordDB.receive_date == today
    ).scalar()
    
    if today_receive_count >= activity.daily_limit:
        return error_response(code=400, message="今日领取次数已达上限")
    
    
    try:
        # 发放优惠券
        for coupon_id, count in activity.coupon_config.items():
            coupon = db.query(CouponDB).filter(CouponDB.id == coupon_id).first()
            if coupon:
                # 循环发放指定数量的优惠券
                for _ in range(count):
                    # 当天晚上12点过期
                    expire_time = datetime.combine(today, datetime.max.time())

                    user_coupon = UserCouponDB(
                        user_id=current_user.userid,
                        coupon_id=coupon.id,
                        coupon_name=coupon.name,
                        coupon_amount=coupon.amount,
                        coupon_type=coupon.coupon_type,
                        expire_time=expire_time,
                        status=CouponStatus.UNUSED
                    )
                    db.add(user_coupon)
        
        # 检查是否领取过优惠券
        receive_record = db.query(CouponReceiveRecordDB).filter(
            CouponReceiveRecordDB.user_id == current_user.userid,
            CouponReceiveRecordDB.activity_id == activity_id,
            CouponReceiveRecordDB.receive_date == today
        ).first()
        
        if receive_record:
            receive_record.receive_count += 1
        else:
            record = CouponReceiveRecordDB(
                user_id=current_user.userid,
                activity_id=activity_id,
                receive_date=today,
                receive_count=1
            )
            db.add(record)
        
        db.commit()
        return success_response(message="领取成功")
    except Exception as e:
        db.rollback()
        return error_response(code=500, message=f"领取失败: {str(e)}")

@router.put("/{activity_id}", response_model=ResponseModel)
async def update_coupon_activity(
    activity_id: int,
    activity: CouponActivityUpdate,
    db: Session = Depends(get_db),
    admin: UserDB = Depends(get_admin_user)
):
    """更新优惠券活动（管理员）"""
    db_activity = db.query(CouponActivityDB).filter(
        CouponActivityDB.id == activity_id
    ).first()
    
    if not db_activity:
        return error_response(code=404, message="活动不存在")
    
    # 检查优惠券是否存在
    if activity.coupon_config:
        for coupon_id, count in activity.coupon_config.items():
            coupon = db.query(CouponDB).filter(CouponDB.id == coupon_id).first()
            if not coupon:
                return error_response(code=404, message=f"优惠券ID {coupon_id} 不存在")
            # 检查数量是否大于0
            if count <= 0:
                return error_response(code=400, message=f"优惠券ID {coupon_id} 的数量必须大于0")
    
    update_data = activity.model_dump(exclude_unset=True)
    for key, value in update_data.items():
        setattr(db_activity, key, value)
    
    try:
        db.commit()
        db.refresh(db_activity)
        return success_response(data=CouponActivityInfo.model_validate(db_activity))
    except Exception as e:
        db.rollback()
        return error_response(code=500, message=f"更新失败: {str(e)}")