package main

import "fmt"

type prod_category int

const ( //Subtask 1
	ELECTRONICS prod_category = iota
	GROCERIES   prod_category = iota
	CLOTHES     prod_category = iota
)

type Product struct {
	category  prod_category
	name      string
	quantitiy float32
	price     float32
}

var initial_inventory = [1]Product{{ELECTRONICS, "Laptop", 10, 100.0}} //Subtask 2 => Did you mean "product(s)" instead of "product names"
var inventory = initial_inventory[0:]                                  //Subtask 3

var product_categories = map[prod_category]string{
	0: "Electronics",
	1: "Groceries",
	2: "Clothes",
} //Subtask 4

// From here on Subtask 5:
func AddProduct(category prod_category, name string, quantity float32, price float32) {
	inventory = append(inventory, Product{category, name, quantity, price})

}

func RemoveProduct(product_name string) {

	var new_inventory = []Product{}

	for i := 0; i < len(inventory); i++ {

		if inventory[i].name != product_name {
			new_inventory = append(new_inventory, inventory[i])
		}
	}

	inventory = new_inventory

}

func DisplayInventory() {

	fmt.Println("Hier ist ihre Produktuebersicht:")
	fmt.Println("Kategorie:   |Name:   |Preis:   |Menge: |")

	for i := 0; i < len(inventory); i++ {
		product := inventory[i]
		fmt.Printf("%s | %s | %.2f | %.2f |\n", product_categories[product.category], product.name, product.price, product.quantitiy)
	}
	fmt.Println()
}

func UpdateQuantitiy(product_name string, new_quantity float32) {

	for i := 0; i < len(inventory); i++ {

		if inventory[i].name == product_name {
			inventory[i].quantitiy = new_quantity
		}
	}
}

func main() {
	DisplayInventory()
	AddProduct(CLOTHES, "Jeans", 10, 50)
	AddProduct(GROCERIES, "Flour", 5, 3)
	DisplayInventory()
	UpdateQuantitiy("Flour", 100)
	DisplayInventory()
	RemoveProduct("Laptop")
	DisplayInventory()
}