package scheduler

import (
	"errors"
	"fmt"
	"time"

	"git.rosy.net.cn/jx-callback/business/model"
)

var (
	CurrentScheduler Scheduler
)

var (
	ErrStatusIsNotOKForOperation     = errors.New("当前状态操作无效")
	ErrCanNotCreateAtLeastOneWaybill = errors.New("一个运单都不能创建")
	ErrCanNotFindOrder               = errors.New("不能找到订单（一般是由于事件错序）")
	ErrCanNotFindWaybill             = errors.New("不能找到运单（一般是由于事件错序）")
)

type StatusActionConfig struct {
	Timeout       time.Duration                             // 超时时间，为0的话表示立即执行
	TimeoutAction func(order *model.GoodsOrder) (err error) // 超时后需要执行的动作，为nil表示此状态不需要执行监控
}

type PurchasePlatformHandler interface {
	AcceptOrRefuseOrder(order *model.GoodsOrder, isAcceptIt bool) (err error)
	PickedUpGoods(order *model.GoodsOrder) (err error)

	Swtich2SelfDeliver(vendorOrderID string) (err error)

	SelfDeliverDelievering(order *model.GoodsOrder) (err error)
	SelfDeliverDelievered(order *model.GoodsOrder) (err error)

	GetStatusActionConfig(status int) *StatusActionConfig
}

type DeliveryPlatformHandler interface {
	CreateWaybill(order *model.GoodsOrder) (err error)
	CancelWaybill(bill *model.Waybill) (err error)
}

type OrderManager interface {
	LoadOrder(vendorOrderID string, vendorID int) (order *model.GoodsOrder, err error)
	OnOrderStatusChanged(status *model.OrderStatus) (err error) // 此消息是否使用还不确定
	UpdateWaybillVendorID(bill *model.Waybill) (err error)
}

type Scheduler interface {
	RegisterOrderManager(handler OrderManager)
	RegisterPurchasePlatform(vendorID int, handler PurchasePlatformHandler)
	RegisterDeliveryPlatform(vendorID int, handler DeliveryPlatformHandler)

	// 以下是订单
	OnOrderNew(order *model.GoodsOrder) (err error)
	OnOrderStatusChanged(status *model.OrderStatus) (err error)

	// 以下是运单
	OnWaybillStatusChanged(bill *model.Waybill) (err error)
}

type BaseScheduler struct {
	CurOrderManager          OrderManager
	PurchasePlatformHandlers map[int]PurchasePlatformHandler
	DeliveryPlatformHandlers map[int]DeliveryPlatformHandler
}

func (c *BaseScheduler) Init() {
	c.PurchasePlatformHandlers = make(map[int]PurchasePlatformHandler)
	c.DeliveryPlatformHandlers = make(map[int]DeliveryPlatformHandler)
}

func (c *BaseScheduler) RegisterOrderManager(handler OrderManager) {
	c.CurOrderManager = handler
}

func (c *BaseScheduler) RegisterPurchasePlatform(vendorID int, handler PurchasePlatformHandler) {
	if !(vendorID >= model.VendorIDPurchaseBegin && vendorID <= model.VendorIDPurchaseEnd) {
		panic(fmt.Sprintf("purchase vendor:%d is illegal", vendorID))
	}
	if _, ok := c.PurchasePlatformHandlers[vendorID]; ok {
		panic(fmt.Sprintf("purchase vendor:%d, already exists", vendorID))
	}
	c.PurchasePlatformHandlers[vendorID] = handler
}

func (c *BaseScheduler) RegisterDeliveryPlatform(vendorID int, handler DeliveryPlatformHandler) {
	if !(vendorID >= model.VendorIDDeliveryBegin && vendorID <= model.VendorIDDeliveryEnd) {
		panic(fmt.Sprintf("delivery vendor:%d is illegal", vendorID))
	}
	if _, ok := c.DeliveryPlatformHandlers[vendorID]; ok {
		panic(fmt.Sprintf("delivery vendor:%d, already exists", vendorID))
	}
	c.DeliveryPlatformHandlers[vendorID] = handler
}

func (c *BaseScheduler) GetPurchasePlatformFromVendorID(vendorID int) PurchasePlatformHandler {
	return c.PurchasePlatformHandlers[vendorID]
}

func (c *BaseScheduler) GetDeliveryPlatformFromVendorID(vendorID int) DeliveryPlatformHandler {
	return c.DeliveryPlatformHandlers[vendorID]
}

type BasePurchasePlatform struct {
}

func (p *BasePurchasePlatform) GetStatusActionConfig(status int) *StatusActionConfig {
	return nil
}