/**
 * `interface {struct}` and `interface {*struct}` manipulation in Golang using reflect.
 *
 * Use case: To instantiate a struct using reflect and use libraries like JSON.Decode at runtime.
 */

package main

import "reflect"

type Struct struct {
	Name string
}

func init() {

	intp_ptr := reflect.TypeOf((*Struct)(nil)) // Type *Struct
	intp_nptr := intp_ptr.Elem()               // Type  Struct

	// VALUE
	nptr_ptr := reflect.New(intp_nptr) // Pointer Struct
	nptr_val := nptr_ptr.Elem()        // Value  Struct
	nptr_vle_ptr := nptr_val.Addr()    // Value *Struct

	// POINTER
	ptr := reflect.New(intp_ptr)   // Pointer {*Struct}
	ptr_val := ptr.Elem()          // Value
	ptr_val.Set(nptr_vle_ptr)      // point to value
	ptr_int := ptr_val.Interface() // interface {*Struct}    <<<----- `interface {}(*main.Struct) *{Name: ""}`

	reflect.Indirect(nptr_val).Field(0).SetString("Alex")

	print((ptr_int.(*Struct)).Name)

	(ptr_int.(*Struct)).Name = "Alex Rodin"
	print((ptr_int.(*Struct)).Name)

	nptr_int := nptr_val.Interface() // interface {Struct}   <<<----- `interface {}(main.Struct) {Name: "Alex Rodin"}`
	print((nptr_int.(Struct)).Name)
}