// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package madmin

import (
	"context"
	"encoding/json"
	"net/http"
	"net/url"
)

// ServerUpdateStatus - contains the response of service update API
type ServerUpdateStatus struct {
	CurrentVersion string `json:"currentVersion"`
	UpdatedVersion string `json:"updatedVersion"`
}

// ServerUpdate - updates and restarts the MinIO cluster to latest version.
// optionally takes an input URL to specify a custom update binary link
func (adm *AdminClient) ServerUpdate(ctx context.Context, updateURL string) (us ServerUpdateStatus, err error) {
	queryValues := url.Values{}
	queryValues.Set("updateURL", updateURL)

	// Request API to Restart server
	resp, err := adm.executeMethod(ctx,
		http.MethodPost, requestData{
			relPath:     adminAPIPrefix + "/update",
			queryValues: queryValues,
		},
	)
	defer closeResponse(resp)
	if err != nil {
		return us, err
	}

	if resp.StatusCode != http.StatusOK {
		return us, httpRespToErrorResponse(resp)
	}

	if err = json.NewDecoder(resp.Body).Decode(&us); err != nil {
		return us, err
	}

	return us, nil
}