package utils

import (
	"encoding/json"
	"fmt"
	"reflect"
	"sort"
)

// GetAllStringKeysOfMap returns all keys of a map with string keys (sorted)
func GetAllStringKeysOfMap(in interface{}) []string {
	v := reflect.ValueOf(in)
	if v.Kind() != reflect.Map {
		return []string{}
	}

	keyType := v.Type().Key()
	if keyType.Kind() != reflect.String {
		return []string{}
	}

	keys := make([]string, v.Len())
	for i, key := range v.MapKeys() {
		keys[i] = key.String()
	}
	sort.Strings(keys)

	return keys
}

// PrettyPrint tries to print in as a pretty JSON
func PrettyPrint(in interface{}) {
	result, err := json.MarshalIndent(in, "", "    ")
	if err != nil {
		fmt.Println("Error:", err)
		return
	}
	fmt.Println(string(result))
}