// FormatGroceryItemsMap Example
// Run this example on the Kotlin Playground Webpage at
// https://play.kotlinlang.org
// Remove or comment out example outputs before running.

//*********************************
// Example A. Load GroceryItem data
// into MutableMap collection.
//*********************************

// Grocery items entered from TextField
// and read into these variables.
var desc = "Peanuts"
var code = "24680"
var price = "2.99"

// Create mutable map. In an app, 
// is a state variable.
var groceryMap = mutableMapOf<String, String>( )

// Load grocery items into map.
var groceryItem = "($desc;$code;$price)"
groceryMap.put(code, groceryItem)

// Add another item.
desc = "Cashews"
code = "32435"
price = "2.99"
groceryItem = "($desc;$code;$price)"
// Use code for the map key.
groceryMap.put(code, groceryItem)

// Look at current items in the map.
println(groceryMap.toString( ))
println( )

// Output:
[(Peanuts;24680;2.99), (Cashews;32435;2.99)]
// Grocery items in this format can be stored
// in a file.

//*********************************
// Example B. Format GroceryItem data
// from MutableMap to display string, for 
// example in a Text element.
//*********************************

// Sample values of items in mutableMap:
{24680=(Peanuts;24680;2.99), 32435=(Cashews;32435;2.99)}

// Select map item with key 32435
var key = "32435"
var display = ""

if (key in groceryMap) {
    // groceryMap.getValue(key) is needed instead
    // of groceryMap[key] to insure a String return 
    // value instead of String?
    var item = groceryMap.getValue(key)
    println(item)
    var item2 = item.removeSurrounding("(", ")")
    println(item2)
    var itemArray = item2.split(";")
    display +=
        "Key: $key\n" +
        "Description: ${itemArray[0]}\n" +
        "Code: ${itemArray[1]}\n" +
        "Price: ${itemArray[2]}\n\n"     
} 
println(display)
// Output:
Description: Peanuts
Code: 24680
Price: 2.99

Description: Cashews
Code: 32435
Price: 2.99

//****************************************
// Example C. Load list toString formatted
// formatted data from file back into list.
//****************************************

var formatted = "[(Peanuts;24680;2.99), (Cashews;32435;2.99)]"
groceryMap.clear( )
val formattedArray = formatted.removeSurrounding("[", "]")
val groceryArray = formattedArray.split(",")
println(groceryArray)
for(item in groceryArray) {
    val key = item.split(";")[1].trim( );
    groceryMap.put(key, item)
}
print(groceryMap)
// Output:
{24680=(Peanuts;24680;2.99), 32435=(Cashews;32435;2.99)}