package controller

import (
	"encoding/json"
	"errors"
	"io/ioutil"

	"os"

	"github.com/gin-gonic/gin"
	log "github.com/sirupsen/logrus"
)

var (
	// ErrJsonPayloadEmpty is returned when the JSON payload is empty.
	ErrJsonPayloadEmpty = errors.New("JSON payload is empty")
)

// DecodeJsonPayload reads the request body and decodes the JSON using json.Unmarshal.
func DecodeJsonPayload(c *gin.Context, v interface{}) error {

	defer func() {
		if r := recover(); r != nil {
			log.Error("DecodeJsonPayload:", r)
		}
	}()

	content, err := ioutil.ReadAll(c.Request.Body)
	c.Request.Body.Close()
	if err != nil {
		return err
	}
	if len(content) == 0 {
		return ErrJsonPayloadEmpty
	}
	err = json.Unmarshal(content, v)
	if err != nil {
		return err
	}
	return nil
}

func EncodeJsonPayload(v interface{}) (data interface{}, err error) {

	defer func() {
		if r := recover(); r != nil {
			log.Error("EncodeJsonPayload:", r)
		}
	}()

	obj_value, err := json.Marshal(v)
	if err != nil {
		log.Println("error:", err)
	}
	os.Stdout.Write(obj_value)
	return obj_value, err
}