package om

import (
	"encoding/json"
	"fmt"
)

// certificateRequest 定义 OM 认证指令的数据结构
type certificateRequest struct {
	Class       Class   `json:"class"`
	Command     Command `json:"command"`
	Certificate string  `json:"certificate"`
}

// DefaultCert OM 协议默认的证书
var DefaultCert = "BQACRHQAAQEJcGFyYW1ldGVyBQCAAQBIMEYCIQDbbu86X1E5e1uXkpvKeuMSL6U4rcbmpyXUKFd83HBs/wIhAI0iVz4/eWay5D1FwznBge7KYkCMepTg7MW97YQozdlv"

// NewCertficateCommand 创建OM协议的认证指令
func NewCertficateRequest() *certificateRequest {
	return &certificateRequest{
		Class:       CLS_CERTIFICATE,
		Command:     CMD_REQ_SET,
		Certificate: DefaultCert,
	}
}

func (own *certificateRequest) SET(cert ...string) *certificateRequest {
	if len(cert) > 0 {
		if cert[0] == "" {
			own.Certificate = DefaultCert
			return own
		}

		own.Certificate = cert[0]
	}

	return own
}

func (own *certificateRequest) Validate() error {
	if own.Class != CLS_CERTIFICATE {
		return fmt.Errorf("[Om.Certificate.Set] class error: %v", own.Class)
	} else if own.Command != CMD_REQ_SET {
		return fmt.Errorf("[Om.Certificate.Set] command error: %v", own.Command)
	} else if own.Certificate == "" {
		return fmt.Errorf("[Om.Certificate.Set] certificateRequest empty")
	}

	return nil
}

func (own *certificateRequest) String() string {
	res, _ := json.Marshal(&own)
	return string(res)
}

func (own *certificateRequest) GetClass() Class {
	return own.Class
}

func (own *certificateRequest) GetCommand() Command {
	return own.Command
}