package views

import (
	"net/http"
   "strconv"
   "html/template"
	. "Elektromarket/models"
)

func ExecuteView(w http.ResponseWriter, r *http.Request, templateName string, data map[string]interface{})  {
   data["cart"] = ShoppingCart
   t, _ := template.ParseFiles(templateName, "templates/base.html")
	t.ExecuteTemplate(w, "base", data)
}

func IndexView(p Page, w http.ResponseWriter, r *http.Request)  {
   ExecuteView(w, r, p.Template, p.Data)
}

func CategoryView(p Page, w http.ResponseWriter, r *http.Request)  {
   id, err := strconv.Atoi(r.URL.Query()["id"][0])
   if err == nil {
      p.Data = map[string]interface{}{
   		"category": GetCategoryById(id),
   		"products": GetCategoryProducts(id),
   	}
   }
   ExecuteView(w, r, p.Template, p.Data)
}

func ProductView(p Page, w http.ResponseWriter, r *http.Request)  {
   id, err := strconv.Atoi(r.URL.Query()["id"][0])
   if err == nil {
      p.Data = map[string]interface{}{
   		"product": GetProductById(id),
   	}
   }
   ExecuteView(w, r, p.Template, p.Data)
}

func CartView(p Page, w http.ResponseWriter, r *http.Request)  {
   ExecuteView(w, r, p.Template, p.Data)
}

func AddToCartView(p Page, w http.ResponseWriter, r *http.Request)  {
   id, err := strconv.Atoi(r.URL.Query()["id"][0])
   quantity, erro := strconv.Atoi(r.URL.Query()["quantity"][0])
   if err == nil && erro == nil {
      prod := GetProductById(id)
      if prod.Quantity >= quantity {
         prod.Quantity -= quantity
         prod.Save()
			var exists bool = false
			for i:= range ShoppingCart.Products {
				if prod.Id == ShoppingCart.Products[i].Product.Id {
					exists = true
					ShoppingCart.Products[i].Quantity += quantity
					break
				}
			}
			if !exists {
         	ShoppingCart.Products = append(ShoppingCart.Products, CartProduct{prod, quantity, 0})
			}
			ShoppingCart.Calculate()
      }
   }
   ExecuteView(w, r, "templates/cart.html", p.Data)
}