package controller

import (
	"GolangLearnPractice1/bookstore/dao"
	"GolangLearnPractice1/bookstore/model"
	"GolangLearnPractice1/bookstore/utils"
	"fmt"
	"html/template"
	"net/http"
	"time"
)

//Checkout 去结账
func Checkout(w http.ResponseWriter, r *http.Request) {
	//获取session
	_, session := dao.IsLogin(r)
	//获取用户ID
	userID := session.UserID
	//获取购物车
	cart, _ := dao.GetCartByUserID(userID)
	fmt.Println("获取的购物车信息是：", cart)
	fmt.Println("购物车对应的userID是：", userID)
	//生成订单号
	orderID := utils.CreateUUID()
	//获取订单生成的时间,时区不一样，所以加8个小时
	createTime := time.Now().Format("2006-01-02 15:04:05")
	//创建Order
	order := &model.Order{
		OrderID:     orderID,
		CreateTime:  createTime,
		TotalCount:  cart.TotalCount,
		TotalAmount: cart.TotalAmount,
		State:       0,
		UserID:      int64(userID),
	}
	//将订单保存到数据库
	dao.AddOrder(order)
	//保存购物车中的购物项
	cartItems := cart.CartItems
	for _, v := range cartItems {
		//根据每一个购物项创建一个订单项
		orderItem := &model.OrderItem{
			Count:   v.Count,
			Amount:  v.Amount,
			Title:   v.Book.Title,
			Author:  v.Book.Author,
			Price:   v.Book.Price,
			ImgPath: v.Book.ImgPath,
			OrderID: orderID,
		}
		//将购物项保存到数据库
		dao.AddOrderItem(orderItem)
		//更新购物项对应图书的库存和销量
		book := v.Book
		book.Sales = book.Sales + int(v.Count)
		book.Stock = book.Stock - int(v.Count)
		//更新数据库中图书的信息
		dao.UpdateBook(book)
	}
	//清空购物车
	dao.DeleteCartByCartID(cart.CartID)
	//将order放到session里面
	session.Orders = append(session.Orders, order)
	//将orderID放到session里面
	session.OrderID = orderID
	//解析模板
	t := template.Must(template.ParseFiles("view/pages/cart/checkout.html"))
	t.Execute(w, session)

}

//GetMyOrders 获取用户订单
func GetMyOrders(w http.ResponseWriter, r *http.Request) {
	//获取session
	_, session := dao.IsLogin(r)
	//获取用户ID
	userID := session.UserID
	//根据用户ID得到所有订单
	orders, _ := dao.GetOrderByUserID(userID)
	if orders != nil {
		//用户有订单
		//将用户所有订单放到session里
		session.Orders = orders
		t := template.Must(template.ParseFiles("view/pages/order/order.html"))
		t.Execute(w, session)
	} else {
		//用户还没有订单
		session.Orders = orders
		t := template.Must(template.ParseFiles("view/pages/order/order.html"))
		t.Execute(w, session)
	}

}

//GetOrders 获取数据库中所有订单
func GetOrders(w http.ResponseWriter, r *http.Request) {
	//从数据库中拿到订单数据
	orders, _ := dao.GetOrders()
	if orders != nil {
		//数据库中有订单
		t := template.Must(template.ParseFiles("view/pages/order/order_manager.html"))
		t.Execute(w, orders)
	} else {
		//数据库中么有订单
	}

}

//GetOrderInfo 获取订单详情
func GetOrderInfo(w http.ResponseWriter, r *http.Request) {
	//获取订单号
	orderID := r.FormValue("orderId")
	//根据订单号获取所有的订单项
	orderItems, _ := dao.GetOrderItemsByOrderID(orderID)
	//解析模板
	t := template.Must(template.ParseFiles("view/pages/order/order_info.html"))
	t.Execute(w, orderItems)

}

//SendOrder 发货
func SendOrder(w http.ResponseWriter, r *http.Request) {
	//获取要发送的订单号
	orderID := r.FormValue("OrderId")
	//调用dao中更改订单状态的函数
	dao.UpdateOrderState(orderID, 1)
	//调用GetOrders获取所有订单
	GetOrders(w, r)
}

//TakeOrder 确认收货
func TakeOrder(w http.ResponseWriter, r *http.Request) {
	//获取要收货的订单号
	orderID := r.FormValue("OrderId")
	//调用dao中的方法调整订单的状态
	dao.UpdateOrderState(orderID, 2)
	//调用GetMyOrders更新所有订单
	GetMyOrders(w, r)
}