package data

import (
	"fmt"
	"strconv"
)

// Declare a custom Runtime type, which has the underlying int32 type
type Runtime int32

// The rule about pointers vs. values for receivers is that value methods
//  can be invoked on pointers and values, but pointer methods can only
// be invoked on pointers.

// Implements json.Marshaler interface.
func (r Runtime) MarshalJSON() ([]byte, error) {
	// Generate a string containing the movie runtime
	jsonValue := fmt.Sprintf("%d mins", r)

	//Use strconv.Quote() function on the string to wrap it in double quotes
	// necessary to be valid json
	quotedJSONValue := strconv.Quote(jsonValue)

	// convert the string to byte slice and return it

	return []byte(quotedJSONValue), nil
}