// Files will list all of the file and directory information in the given <path>.
func (j *Junos) Files(path string) (*FileList, error) {
	dir := strings.TrimRight(path, "/")
	var files FileList
	var command = fmt.Sprintf(rpcFileList, dir+"/")
	errMessage := "No output available. Please check the syntax of your command."

	reply, err := j.Session.Exec(netconf.RawRPC(command))
	if err != nil {
		return nil, err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return nil, errors.New(m.Message)
		}
	}

	if reply.Data == "" {
		return nil, errors.New(errMessage)
	}

	data := strings.Replace(reply.Data, "\n", "", -1)
	err = xml.Unmarshal([]byte(data), &files)
	if err != nil {
		return nil, err
	}

	if len(files.Error) > 0 {
		return nil, fmt.Errorf("%s: No such file or directory", path)
	}

	return &files, nil
}

// CommitFull does a full commit on the configuration, which requires all daemons to
// check and evaluate the new configuration. Useful for when you get an error with
// a commit or when you've changed the configuration significantly.
func (j *Junos) CommitFull() error {
	var errs commitResults
	reply, err := j.Session.Exec(netconf.RawRPC(rpcCommitFull))
	if err != nil {
		return err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return errors.New(m.Message)
		}
	}

	err = xml.Unmarshal([]byte(reply.Data), &errs)
	if err != nil {
		return err
	}

	if errs.Errors != nil {
		for _, m := range errs.Errors {
			message := fmt.Sprintf("[%s]\n    %s\nError: %s", strings.Trim(m.Path, "[\r\n]"), strings.Trim(m.Element, "[\r\n]"), strings.Trim(m.Message, "[\r\n]"))
			return errors.New(message)
		}
	}

	return nil
}

// RollbackConfig loads and commits the configuration of a given rollback or rescue state.
func (j *Junos) RollbackConfig(option interface{}) error {
	var command = fmt.Sprintf(rpcRollbackConfig, option)

	if option == "rescue" {
		command = fmt.Sprintf(rpcRescueConfig)
	}

	reply, err := j.Session.Exec(netconf.RawRPC(command))
	if err != nil {
		return err
	}

	err = j.Commit()
	if err != nil {
		return err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return errors.New(m.Message)
		}
	}

	return nil
}

// Reboot will reboot the device.
func (j *Junos) Reboot() error {
	reply, err := j.Session.Exec(netconf.RawRPC(rpcReboot))
	if err != nil {
		return err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return errors.New(m.Message)
		}
	}

	return nil
}

// GetConfig returns the full configuration, or configuration starting at <section>.
// <format> can be one of "text" or "xml." You can do sub-sections by separating the
// <section> path with a ">" symbol, i.e. "system>login" or "protocols>ospf>area".
func (j *Junos) GetConfig(section, format string) (string, error) {
	secs := strings.Split(section, ">")
	nSecs := len(secs) - 1
	command := fmt.Sprintf("<get-configuration format=\"%s\"><configuration>", format)
	if section == "full" {
		command += "</configuration></get-configuration>"
	}

	if nSecs >= 0 {
		for i := 0; i < nSecs; i++ {
			command += fmt.Sprintf("<%s>", secs[i])
		}
		command += fmt.Sprintf("<%s/>", secs[nSecs])

		for j := nSecs - 1; j >= 0; j-- {
			command += fmt.Sprintf("</%s>", secs[j])
		}
		command += fmt.Sprint("</configuration></get-configuration>")
	}

	reply, err := j.Session.Exec(netconf.RawRPC(command))
	if err != nil {
		return "", err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return "", errors.New(m.Message)
		}
	}

	if format == "text" {
		var output commandXML
		err = xml.Unmarshal([]byte(reply.Data), &output)
		if err != nil {
			return "", err
		}

		return output.Config, nil
	}

	return reply.Data, nil
}

// Rescue will create or delete the rescue configuration given "save" or "delete."
func (j *Junos) Rescue(action string) error {
	command := fmt.Sprintf(rpcRescueSave)

	if action == "delete" {
		command = fmt.Sprintf(rpcRescueDelete)
	}

	reply, err := j.Session.Exec(netconf.RawRPC(command))
	if err != nil {
		return err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return errors.New(m.Message)
		}
	}

	return nil
}

// ConfigDiff compares the current active configuration to a given rollback configuration.
func (j *Junos) ConfigDiff(compare int) (string, error) {
	var rb diffXML
	command := fmt.Sprintf(rpcGetRollbackCompare, compare)
	reply, err := j.Session.Exec(netconf.RawRPC(command))
	if err != nil {
		return "", err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return "", errors.New(m.Message)
		}
	}

	err = xml.Unmarshal([]byte(reply.Data), &rb)
	if err != nil {
		return "", err
	}

	return rb.Config, nil
}

// CommitHistory gathers all the information about previous commits.
func (j *Junos) CommitHistory() (*CommitHistory, error) {
	var history CommitHistory
	reply, err := j.Session.Exec(netconf.RawRPC(rpcCommitHistory))
	if err != nil {
		return nil, err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return nil, errors.New(m.Message)
		}
	}

	if reply.Data == "" {
		return nil, errors.New("could not load commit history")
	}

	err = xml.Unmarshal([]byte(reply.Data), &history)
	if err != nil {
		return nil, err
	}

	return &history, nil
}

// RunCommand executes any operational mode command, such as "show" or "request."
// <format> can be one of "text" or "xml."
func (j *Junos) RunCommand(cmd, format string) (string, error) {
	var command string
	command = fmt.Sprintf(rpcCommand, cmd)
	errMessage := "No output available. Please check the syntax of your command."

	if format == "xml" {
		command = fmt.Sprintf(rpcCommandXML, cmd)
	}

	reply, err := j.Session.Exec(netconf.RawRPC(command))
	if err != nil {
		return errMessage, err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return errMessage, errors.New(m.Message)
		}
	}

	if reply.Data == "" {
		return errMessage, nil
	}

	if format == "text" {
		var output commandXML
		err = xml.Unmarshal([]byte(reply.Data), &output)
		if err != nil {
			return "", err
		}

		return output.Config, nil
	}

	return reply.Data, nil
}

// NewSession establishes a new connection to a Junos device that we will use
// to run our commands against. NewSession also gathers software information
// about the device.
func NewSession(host, user, password string) (*Junos, error) {
	rex := regexp.MustCompile(`^.*\[(.*)\]`)
	s, err := netconf.DialSSH(host, netconf.SSHConfigPassword(user, password))
	if err != nil {
		log.Fatal(err)
	}

	reply, err := s.Exec(netconf.RawRPC(rpcVersion))
	if err != nil {
		return nil, err
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return nil, errors.New(m.Message)
		}
	}

	if strings.Contains(reply.Data, "multi-routing-engine-results") {
		var facts versionRouteEngines
		err = xml.Unmarshal([]byte(reply.Data), &facts)
		if err != nil {
			return nil, err
		}

		numRE := len(facts.RE)
		hostname := facts.RE[0].Hostname
		res := make([]RoutingEngine, 0, numRE)

		for i := 0; i < numRE; i++ {
			version := rex.FindStringSubmatch(facts.RE[i].PackageInfo[0].SoftwareVersion[0])
			model := strings.ToUpper(facts.RE[i].Platform)
			res = append(res, RoutingEngine{Model: model, Version: version[1]})
		}

		return &Junos{
			Session:        s,
			Hostname:       hostname,
			RoutingEngines: numRE,
			Platform:       res,
		}, nil
	}

	var facts versionRouteEngine
	err = xml.Unmarshal([]byte(reply.Data), &facts)
	if err != nil {
		return nil, err
	}

	// res := make([]RoutingEngine, 0)
	var res []RoutingEngine
	hostname := facts.Hostname
	version := rex.FindStringSubmatch(facts.PackageInfo[0].SoftwareVersion[0])
	model := strings.ToUpper(facts.Platform)
	res = append(res, RoutingEngine{Model: model, Version: version[1]})

	return &Junos{
		Session:        s,
		Hostname:       hostname,
		RoutingEngines: 1,
		Platform:       res,
	}, nil
}

// Config loads a given configuration file from your local machine,
// a remote (FTP or HTTP server) location, or via configuration statements
// from variables (type string or []string) within your script. Format can be one of
// "set" "text" or "xml."
func (j *Junos) Config(path interface{}, format string, commit bool) error {
	var command string
	switch format {
	case "set":
		switch path.(type) {
		case string:
			if strings.Contains(path.(string), "tp://") {
				command = fmt.Sprintf(rpcConfigURLSet, path.(string))
			}

			if _, err := ioutil.ReadFile(path.(string)); err != nil {
				command = fmt.Sprintf(rpcConfigStringSet, path.(string))
			} else {
				data, err := ioutil.ReadFile(path.(string))
				if err != nil {
					return err
				}

				command = fmt.Sprintf(rpcConfigFileSet, string(data))
			}
		case []string:
			command = fmt.Sprintf(rpcConfigStringSet, strings.Join(path.([]string), "\n"))
		}
	case "text":
		switch path.(type) {
		case string:
			if strings.Contains(path.(string), "tp://") {
				command = fmt.Sprintf(rpcConfigURLText, path.(string))
			}

			if _, err := ioutil.ReadFile(path.(string)); err != nil {
				command = fmt.Sprintf(rpcConfigStringText, path.(string))
			} else {
				data, err := ioutil.ReadFile(path.(string))
				if err != nil {
					return err
				}

				command = fmt.Sprintf(rpcConfigFileText, string(data))
			}
		case []string:
			command = fmt.Sprintf(rpcConfigStringText, strings.Join(path.([]string), "\n"))
		}
	case "xml":
		switch path.(type) {
		case string:
			if strings.Contains(path.(string), "tp://") {
				command = fmt.Sprintf(rpcConfigURLXML, path.(string))
			}

			if _, err := ioutil.ReadFile(path.(string)); err != nil {
				command = fmt.Sprintf(rpcConfigStringXML, path.(string))
			} else {
				data, err := ioutil.ReadFile(path.(string))
				if err != nil {
					return err
				}

				command = fmt.Sprintf(rpcConfigFileXML, string(data))
			}
		case []string:
			command = fmt.Sprintf(rpcConfigStringXML, strings.Join(path.([]string), "\n"))
		}
	}

	reply, err := j.Session.Exec(netconf.RawRPC(command))
	if err != nil {
		return err
	}

	if commit {
		err = j.Commit()
		if err != nil {
			return err
		}
	}

	if reply.Errors != nil {
		for _, m := range reply.Errors {
			return errors.New(m.Message)
		}
	}

	return nil
}