package gondole

import (

	"net/url"

	"strings"

	"github.com/sendgrid/rest"

)

type registerApp struct {

	ID           int    `json:"id"`

	ClientID     string `json:"client_id"`

	ClientSecret string `json:"client_secret"`

}

// NewApp registers a new instance

func NewApp(name string, scopes []string, redirectURI, instanceURL string) (g *Client, err error) {

	if instanceURL == "" {

		instanceURL = defaultInstanceURL

	}

	if !strings.Contains(instanceURL, "://") {

		instanceURL = "https://" + instanceURL

	}

	apiPath := instanceURL + defaultAPIPath

	if _, err := url.ParseRequestURI(apiPath); err != nil {

		return nil, err

	}

	g = &Client{

		Name:        name,

		APIBase:     apiPath,

		InstanceURL: instanceURL,

	}

	params := make(apiCallParams)

	params["client_name"] = name

	params["scopes"] = strings.Join(scopes, " ")

	if redirectURI != "" {

		params["redirect_uris"] = redirectURI

	} else {

		params["redirect_uris"] = NoRedirect

	}

	var app registerApp

	if err := g.apiCall("apps", rest.Post, params, &app); err != nil {

		return nil, err

	}

	g.ID = app.ClientID

	g.Secret = app.ClientSecret

	return

}