package logic

import (
	"fmt"
	"fusenapi/constants"
	"fusenapi/service/repositories"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"sync"
	"time"

	"context"

	"fusenapi/server/order/internal/svc"
	"fusenapi/server/order/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type CreateOrderLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewCreateOrderLogic(ctx context.Context, svcCtx *svc.ServiceContext) *CreateOrderLogic {
	return &CreateOrderLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// 处理进入前逻辑w,r
// func (l *CreateOrderLogic) BeforeLogic(w http.ResponseWriter, r *http.Request) {
// }

var locks map[string]*sync.Mutex
var locksMutex sync.Mutex

func (l *CreateOrderLogic) CreateOrder(req *types.CreateOrderReq, userinfo *auth.UserInfo) (resp *basic.Response) {
	// 返回值必须调用Set重新返回, resp可以空指针调用 resp.SetStatus(basic.CodeOK, data)
	// userinfo 传入值时, 一定不为null
	if !userinfo.IsUser() {
		// 如果是，返回未授权的错误码
		return resp.SetStatus(basic.CodeUnAuth)
	}

	// var lockKey string
	// for _, v := range req.CartIds {
	// 	var vStr = strconv.Itoa(int(v))
	// 	lockKey = lockKey + "|" + vStr
	// }
	// // 分布式锁--防止重复下单
	// LockWith(lockKey) //获取锁
	// fmt.Println("获取到了锁")

	tPlus60Days := time.Now().AddDate(0, 0, 60).UTC()
	res, err := l.svcCtx.Repositories.NewOrder.Create(l.ctx, &repositories.CreateReq{
		ExpectedDeliveryTime: tPlus60Days,
		CurrentCurrency:      string(constants.CURRENCYUSD),
		OriginalCurrency:     string(constants.CURRENCYUSD),
		UserId:               userinfo.UserId,
		CartIds:              req.CartIds,
		DeliveryMethod:       constants.DELIVERYMETHODDSCLOUDSTORE,
	})

	// UnlockWith(lockKey) //释放锁

	if err != nil {
		return resp.SetStatus(&res.ErrorCode)
	}

	// 延时任务
	time.AfterFunc(time.Minute*30, func() {
		orderSn := res.OrderSn
		fmt.Println("延时任务: OrderSn--", orderSn)
		ctx := context.Background()

		svcCtx := svc.ServiceContext{
			Config:       l.svcCtx.Config,
			Repositories: l.svcCtx.Repositories,
		}
		svcCtx.Repositories.NewOrder.Close(ctx, &repositories.CloseReq{
			OrderSn: orderSn,
			Type:    1,
		})
	})

	return resp.SetStatus(basic.CodeOK, map[string]interface{}{
		"order_sn": res.OrderSn,
	})
}

func LockWith(resource string) {
	locksMutex.Lock()
	lock, ok := locks[resource]
	if !ok {
		lock = &sync.Mutex{}
		locks[resource] = lock
	}
	locksMutex.Unlock()

	lock.Lock()
}

func UnlockWith(resource string) {
	locksMutex.Lock()
	lock, ok := locks[resource]
	if ok {
		lock.Unlock()
	}
	locksMutex.Unlock()
}

// 处理逻辑后 w,r 如:重定向, resp 必须重新处理
// func (l *CreateOrderLogic) AfterLogic(w http.ResponseWriter, r *http.Request, resp *basic.Response) {
// // httpx.OkJsonCtx(r.Context(), w, resp)
// }