/*

 Copyright 2019 The 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 (
	"fmt"
	"github.com/spf13/pflag"
	"kubesphere.io/kubesphere/pkg/utils/net"
	"os"
)

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
}

func NewServerRunOptions() *ServerRunOptions {
	// create default server run options
	s := ServerRunOptions{
		BindAddress:   "0.0.0.0",
		InsecurePort:  9090,
		SecurePort:    0,
		TlsCertFile:   "",
		TlsPrivateKey: "",
	}

	return &s
}

func (s *ServerRunOptions) Validate() []error {
	errs := []error{}

	if s.SecurePort == 0 && s.InsecurePort == 0 {
		errs = append(errs, fmt.Errorf("insecure and secure port can not be disabled at the same time"))
	}

	if net.IsValidPort(s.SecurePort) {
		if s.TlsCertFile == "" {
			errs = append(errs, fmt.Errorf("tls cert file is empty while secure serving"))
		} else {
			if _, err := os.Stat(s.TlsCertFile); err != nil {
				errs = append(errs, err)
			}
		}

		if s.TlsPrivateKey == "" {
			errs = append(errs, fmt.Errorf("tls private key file is empty while secure serving"))
		} else {
			if _, err := os.Stat(s.TlsPrivateKey); err != nil {
				errs = append(errs, err)
			}
		}
	}

	return errs
}

func (s *ServerRunOptions) AddFlags(fs *pflag.FlagSet, c *ServerRunOptions) {

	fs.StringVar(&s.BindAddress, "bind-address", c.BindAddress, "server bind address")
	fs.IntVar(&s.InsecurePort, "insecure-port", c.InsecurePort, "insecure port number")
	fs.IntVar(&s.SecurePort, "secure-port", s.SecurePort, "secure port number")
	fs.StringVar(&s.TlsCertFile, "tls-cert-file", c.TlsCertFile, "tls cert file")
	fs.StringVar(&s.TlsPrivateKey, "tls-private-key", c.TlsPrivateKey, "tls private key")
}
