/*
Copyright (c) 2021 VMware, Inc. All Rights Reserved.

SPDX-License-Identifier: Apache-2.0.
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package networking

import (
	"context"
	"net/http"

	"github.com/vmware/govmomi/vapi/rest"
)

const applianceProxyConfigPath = "/appliance/networking/proxy"
const applianceNoProxyConfigPath = "/appliance/networking/noproxy"

// Manager provides convenience methods to configure appliance proxy.
type Manager struct {
	*rest.Client
}

// NewManager creates a new Manager with the given client
func NewManager(client *rest.Client) *Manager {
	return &Manager{
		Client: client,
	}
}

// Proxy represents configuration for specific proxy - ftp, http, https.
type Proxy struct {
	Server   string `json:"server,omitempty"`
	Port     int    `json:"port,omitempty"`
	Username string `json:"username,omitempty"`
	Password string `json:"password,omitempty"`
	Enabled  bool   `json:"enabled,omitempty"`
}

// ProxyList represents configuration for vcenter proxy.
type ProxyList struct {
	Ftp   Proxy `json:"ftp,omitempty"`
	Http  Proxy `json:"http,omitempty"`
	Https Proxy `json:"https,omitempty"`
}

// ProxyList returns all Proxy configuration.
func (m *Manager) ProxyList(ctx context.Context) (*ProxyList, error) {
	var res ProxyList
	var rawRes []struct {
		Key   string
		Value Proxy
	}

	r := m.Resource(applianceProxyConfigPath)
	err := m.Do(ctx, r.Request(http.MethodGet), &rawRes)
	if err != nil {
		return &res, err
	}

	for _, c := range rawRes {
		switch c.Key {
		case "http":
			res.Http = c.Value
		case "https":
			res.Https = c.Value
		case "ftp":
			res.Ftp = c.Value
		}
	}

	return &res, nil
}

// NoProxy returns all excluded servers for proxying.
func (m *Manager) NoProxy(ctx context.Context) ([]string, error) {
	r := m.Resource(applianceNoProxyConfigPath)
	var res []string
	return res, m.Do(ctx, r.Request(http.MethodGet), &res)
}