package models

import (
	"net/http"
)

type Page struct {
	Path string
	Template string
	Data map[string]interface{}
	View func(Page, http.ResponseWriter, *http.Request)
}

func (p Page) HandlePage(w http.ResponseWriter, r *http.Request) {
	p.View(p, w , r )
}

type Category struct {
   Id int
   Name string
}

type Product struct {
   Id int
   Category Category
   Name string
   Description string
   ImgUrl string
   Quantity int
   Price int
}

type CartProduct struct {
	Product Product
   Quantity int
	PriceTotal int
}

type Cart struct {
	Products []CartProduct
	PriceTotal int
	ItemsTotal int
}

func (c Cart) Calculate() {
	ShoppingCart.PriceTotal = 0
	ShoppingCart.ItemsTotal = 0
	for i:= range c.Products {
		ShoppingCart.Products[i].PriceTotal = ShoppingCart.Products[i].Product.Price * ShoppingCart.Products[i].Quantity
		ShoppingCart.PriceTotal += ShoppingCart.Products[i].PriceTotal
		ShoppingCart.ItemsTotal += ShoppingCart.Products[i].Quantity
	}
}

var Pages map[string]Page
var Categories []Category
var Products []Product
var ShoppingCart Cart

func (p Product) Save()  {
	for i:= range Products {
		if Products[i].Id == p.Id {
			Products[i] = p
			break
		}
	}
}

func GetCategoryByName(name string) Category {
	var category Category
	for i:= range Categories {
		if Categories[i].Name == name {
			category = Categories[i]
			break
		}
	}
	return category
}

func GetCategoryById(id int) Category {
	var category Category
	for i:= range Categories {
		if Categories[i].Id == id {
			category = Categories[i]
			break
		}
	}
	return category
}

func GetCategoryProducts(id int) []Product {
	var products []Product
	for i:= range Products {
		if Products[i].Category.Id == id {
			products = append(products, Products[i])
		}
	}
	return products
}

func GetProductById(id int) Product {
	var product Product
	for i:= range Products {
		if Products[i].Id == id {
			product = Products[i]
			break
		}
	}
	return product
}