package orderman

import (
	"errors"
	"sort"
	"time"

	"git.rosy.net.cn/baseapi/utils"
	"git.rosy.net.cn/jx-callback/business/jxcallback/scheduler"
	"git.rosy.net.cn/jx-callback/business/jxutils"
	"git.rosy.net.cn/jx-callback/business/model"
	"git.rosy.net.cn/jx-callback/business/model/dao"
	"git.rosy.net.cn/jx-callback/business/partner"
	"git.rosy.net.cn/jx-callback/globals"
)

const (
	pendingOrderGapMax            = 2 * 24 * time.Hour   // 每次重启机子时，要检查几天内的订单状态
	maxTimeHandlePendingOrder     = 2 * time.Second      //处理pending order的最长时间
	maxSleepGapHandlePendingOrder = 5 * time.Millisecond // 每个pending order的最长时间间隙
)

var (
	ErrCanNotFindOrder   = errors.New("找不到相应订单")
	ErrCanNotFindWaybill = errors.New("找不到相应运单")
)

var (
	FixedOrderManager *OrderManager
)

// 所有公共接口调用前，要求在order里或status中设置合适的Status
type OrderManager struct {
}

func NewOrderManager() *OrderManager {
	return &OrderManager{}
}

type IStatusTimer interface {
	GetStatusTime() time.Time
}

type StatusTimerSlice []IStatusTimer

func (s StatusTimerSlice) Len() int {
	return len(s)
}

func (s StatusTimerSlice) Less(i, j int) bool {
	return s[i].GetStatusTime().Sub(s[j].GetStatusTime()) < 0
}

func (s StatusTimerSlice) Swap(i, j int) {
	tmp := s[i]
	s[i] = s[j]
	s[j] = tmp
}

func init() {
	FixedOrderManager = NewOrderManager()
	partner.InitOrderManager(FixedOrderManager)
}

// 美团回调错误信息
func addOrderOrWaybillStatus(status *model.OrderStatus, db *dao.DaoDB) (isDuplicated bool, err error) {
	if status.OrderType == model.OrderTypeOrder {
		globals.SugarLogger.Debugf("addOrderStatus order:%v", status)
	} else if status.OrderType == model.OrderTypeWaybill {
		globals.SugarLogger.Debugf("addOrderStatus waybill:%v", status)
	} else {
		globals.SugarLogger.Debugf("addOrderStatus afsOrder:%v", status)
	}
	txDB, _ := dao.Begin(db)
	defer func() {
		if r := recover(); r != nil || err != nil {
			globals.SugarLogger.Debug("rollback")
			dao.Rollback(db, txDB)
			if r != nil {
				panic(r)
			}
		}
	}()
	status.ID = 0
	status.Remark = utils.LimitUTF8StringLen(status.Remark, 255)
	created, _, err := db.Db.ReadOrCreate(status, "VendorOrderID", "VendorID", "OrderType", "Status", "VendorStatus", "StatusTime")
	if err == nil {
		if !created {
			globals.SugarLogger.Debugf("duplicated event:%v", status)
			isDuplicated = true
			status.DuplicatedCount++
			utils.CallFuncLogError(func() error {
				_, err = db.Db.Update(status, "DuplicatedCount")
				return err
			}, "addOrderOrWaybillStatus update DuplicatedCount, status:%v", status)
		}
	}
	if err != nil {
		// todo 这里居然会有主键重复错误，逻辑上是不应该的
		globals.SugarLogger.Warnf("addOrderOrWaybillStatus status:%v, access db error:%v", status, err)
	} else {
		dao.Commit(db, txDB)
	}
	return isDuplicated, err
}

func (c *OrderManager) GetStatusDuplicatedCount(status *model.OrderStatus) (duplicatedCount int) {
	if status == nil {
		return 0
	}
	db := dao.GetDB()
	if err := dao.GetEntity(db, status, "VendorOrderID", "VendorID", "OrderType", "VendorStatus", "StatusTime"); err == nil {
		return status.DuplicatedCount
	}
	return 0
}

// todo 最好还是改成全事件回放算了
func LoadPendingOrders() {
	orders, err := dao.LoadPendingOrders(dao.GetDB(), time.Now().Add(-pendingOrderGapMax), model.OrderStatusEndBegin)
	globals.SugarLogger.Infof("LoadPendingOrders orders count:%d, err:%v", len(orders), err)
	if err != nil {
		return
	}

	ordersCount := len(orders)
	if ordersCount > 0 {
		bills := FixedOrderManager.LoadPendingWaybills()
		globals.SugarLogger.Infof("LoadPendingOrders waybills count:%d", len(bills))
		var sortOrders StatusTimerSlice
		orderMap := make(map[string]*model.GoodsOrder)
		for _, order := range orders {
			if order.Status > model.OrderStatusNew {
				status := model.Order2Status(order)
				sortOrders = append(sortOrders, status)
			}
			// order.Status = model.OrderStatusNew // 就是要以实际order状态来调用scheduler.OnOrderNew
			order.StatusTime = order.OrderCreatedAt
			sortOrders = append(sortOrders, order)
			orderMap[jxutils.ComposeUniversalOrderID(order.VendorOrderID, order.VendorID)] = order
		}
		for _, bill := range bills {
			if bill.Status > model.WaybillStatusNew {
				bill2 := *bill
				sortOrders = append(sortOrders, &bill2)
			}
			bill.Status = model.WaybillStatusNew
			bill.StatusTime = bill.WaybillCreatedAt
			sortOrders = append(sortOrders, bill)
		}
		sort.Sort(sortOrders)
		sleepGap := maxTimeHandlePendingOrder / time.Duration(ordersCount)
		if sleepGap > maxSleepGapHandlePendingOrder {
			sleepGap = maxSleepGapHandlePendingOrder
		}
		lastTime := time.Now()
		for _, item := range sortOrders {
			if order, ok := item.(*model.GoodsOrder); ok {
				jxutils.CallMsgHandlerAsync(func() {
					scheduler.CurrentScheduler.OnOrderNew(order, true, true)
				}, jxutils.ComposeUniversalOrderID(order.VendorOrderID, order.VendorID))
			} else if status, ok := item.(*model.OrderStatus); ok {
				jxutils.CallMsgHandlerAsync(func() {
					order := orderMap[jxutils.ComposeUniversalOrderID(status.VendorOrderID, status.VendorID)]
					scheduler.CurrentScheduler.OnOrderStatusChanged(order, status, true)
				}, jxutils.ComposeUniversalOrderID(status.RefVendorOrderID, status.RefVendorID))
			} else {
				bill := item.(*model.Waybill)
				jxutils.CallMsgHandlerAsync(func() {
					scheduler.CurrentScheduler.OnWaybillStatusChanged(bill, true)
				}, jxutils.ComposeUniversalOrderID(bill.VendorOrderID, bill.OrderVendorID))
			}
			curTime := time.Now()
			timeout := sleepGap - curTime.Sub(lastTime)
			if timeout > 0 {
				time.Sleep(timeout)
			}
			lastTime = curTime
		}
	}
}