package gondole

import (

	"encoding/json"

	"fmt"

	"github.com/sendgrid/rest"

)

// GetCurrentInstance returns current instance information

func (g *Client) GetCurrentInstance() (*Instance, error) {

	req := g.prepareRequest("instance")

	r, err := rest.API(req)

	if err != nil {

		return nil, fmt.Errorf("instance: %s", err.Error())

	}

	// Check for error reply

	var errorResult Error

	if err := json.Unmarshal([]byte(r.Body), &errorResult); err == nil {

		// The empty object is not an error

		if errorResult.Text != "" {

			return nil, fmt.Errorf("%s", errorResult.Text)

		}

	}

	// Not an error reply; let's unmarshal the data

	var i Instance

	err = json.Unmarshal([]byte(r.Body), &i)

	if err != nil {

		return nil, fmt.Errorf("instance API: %s", err.Error())

	}

	return &i, nil

}