/*
Copyright 2020 KubeSphere Authors

Licensed under the Apache License, Version 2.0 (the "License");
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 options

import (
	"crypto/tls"
	"gitee.com/websample/webserver/pkg/apiserver"
	"net/http"

	"fmt"
	flag "github.com/spf13/pflag"
)

type ServerRunOptions struct {

	// server bind address
	BindAddress string

	// insecure port number
	InsecurePort int

	// secure port number
	SecurePort int

	// tls cert file
	TlsCertFile string

	// tls private key file
	TlsPrivateKey string

	//
	DebugMode bool
}

// NewServerRunOptions 初始化server 启动参数
func NewServerRunOptions() *ServerRunOptions {
	s := ServerRunOptions{
		BindAddress:   "0.0.0.0",
		InsecurePort:  9090,
		SecurePort:    0,
		TlsCertFile:   "",
		TlsPrivateKey: "",
	}
	return &s
}

// AddFlags 添加程序入参
func (s *ServerRunOptions) AddFlags(fs *flag.FlagSet) {
	fs.StringVar(&s.BindAddress, "bind-address", s.BindAddress, "server bind address")
	fs.IntVar(&s.InsecurePort, "insecure-port", s.InsecurePort, "insecure port number")
	fs.IntVar(&s.SecurePort, "secure-port", s.SecurePort, "secure port number")
	fs.StringVar(&s.TlsCertFile, "tls-cert-file", s.TlsCertFile, "tls cert file")
	fs.StringVar(&s.TlsPrivateKey, "tls-private-key", s.TlsPrivateKey, "tls private key")

}


// NewAPIServer creates an APIServer instance using given options
func (s *ServerRunOptions) NewAPIServer(stopCh <-chan struct{}) (*apiserver.APIServer, error) {
	apiServer := &apiserver.APIServer{}

	server := &http.Server{
		Addr: fmt.Sprintf(":%d", s.InsecurePort),
	}

	if s.SecurePort != 0 {
		certificate, err := tls.LoadX509KeyPair(s.TlsCertFile, s.TlsPrivateKey)
		if err != nil {
			return nil, err
		}
		server.TLSConfig.Certificates = []tls.Certificate{certificate}
	}

	apiServer.Server = server

	return apiServer, nil
}