package pay

import (
	"common/connection"
	"goutil/logUtilPlus"
	"sync"
)

var (
	// 用户缓存对象
	orderMap = make(map[int64]*Order)
	rwmu     sync.RWMutex
)

// GetUserByID 根据用户id获取用户信息
func GetUserByID(orderID int64) (*Order, error) {

	//判断缓存是否存在
	var order *Order

	func() *Order {
		rwmu.RLock()
		defer rwmu.RUnlock()
		ok := true
		if order, ok = orderMap[orderID]; ok {
			return order
		}
		return nil
	}()

	if order != nil {
		return order, nil
	}

	result := connection.GetPayDB().First(&order, orderID)
	if result.Error != nil {
		return nil, result.Error
	}

	//添加缓存
	func() {
		rwmu.Lock()
		defer rwmu.Unlock()
		orderMap[order.OrderID] = order
	}()

	return order, nil
}

// AddOrderCache 添加用户缓存
func AddOrderCache(order *Order) {
	rwmu.Lock()
	defer rwmu.Unlock()
	orderMap[order.OrderID] = order
}

// AddOrder 添加订单
func AddOrder(order *Order) (int64, error) {

	//处理一些验证

	// 写入到数据库
	result := connection.GetPayDB().Create(&order) // 通过数据的指针来创建
	if result.Error != nil {
		logUtilPlus.ErrorLog("添加支付订单失败 错误信息：", result.Error.Error())
	}

	//添加缓存
	AddOrderCache(order)

	return order.OrderID, nil
}