package json

import (
	"encoding/json"
	"fmt"
	"os"
)

var f = fmt.Println

type person1 struct {
	Name string
	Age  uint
}

type person2 struct {
	Name string `json:"name"`
	Age  uint   `json:"age"`
}

type person3 struct {
	Name   string   `json:"name"`
	Age    uint     `json:"age"`
	Albums []string `json:"albums"`
}

func Json() {
	stringBytes, _ := json.Marshal("foo")
	f("string =>", string(stringBytes))

	p1Bytes, _ := json.Marshal(&person1{"Abel", 34})
	f("person1 =>", string(p1Bytes))

	p2Bytes, _ := json.Marshal(&person2{"Abel", 34})
	f("person2 =>", string(p2Bytes))

	jsonBytes := []byte(`{"name": "Abel", "age": 34, "albums": ["Dawn FM"]}`)
	pMap := map[string]any{}
	json.Unmarshal(jsonBytes, &pMap)

	uname := pMap["name"].(string)
	f("map[name] =>", uname)
	ualbums := pMap["albums"].([]any)
	album0 := ualbums[0].(string)
	f("map[albums][0] =>", album0)

	p3 := &person3{}
	json.Unmarshal(jsonBytes, &p3)

	f("p3 =>", p3)

	f("Directly writing to stderr:")
	enc := json.NewEncoder(os.Stderr)
	enc.Encode(&p3)
}