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()
      }
   }
   http.Redirect(w, r, "/cart", http.StatusSeeOther)
}

func RemoveFromCartView(p Page, w http.ResponseWriter, r *http.Request)  {
	id, err := strconv.Atoi(r.URL.Query()["id"][0])
	if err == nil {
		for i:= range ShoppingCart.Products {
			if id == ShoppingCart.Products[i].Product.Id {
				prod := GetProductById(id)
				prod.Quantity += ShoppingCart.Products[i].Quantity
				prod.Save()
				ShoppingCart.Products = append(ShoppingCart.Products[:i], ShoppingCart.Products[i+1:]...)
				break
			}
		}
		ShoppingCart.Calculate()
	}
	http.Redirect(w, r, "/cart", http.StatusSeeOther)
}

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

func PaymentDoneView(p Page, w http.ResponseWriter, r *http.Request)  {
	fn := r.URL.Query()["fn"][0]
	ln := r.URL.Query()["ln"][0]
	pm, err := strconv.Atoi(r.URL.Query()["pm"][0])
	dd := r.URL.Query()["dd"][0]
   if fn != "" && ln != "" && dd != "" && err == nil {
		purchasement := Purchasement{ShoppingCart.Products, ShoppingCart.PriceTotal, fn, ln, pm, dd}
		Purchasements = append(Purchasements, purchasement)
      ShoppingCart.Products = nil
		ShoppingCart.Calculate()
   }
	http.Redirect(w, r, "/purchasements", http.StatusSeeOther)
}

func PurchasementsView(p Page, w http.ResponseWriter, r *http.Request)  {
	p.Data = map[string]interface{}{
		"purchasements": Purchasements,
	}
	ExecuteView(w, r, p.Template, p.Data)
}