You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: parameter.go
    path of file: ./repos/coder/cli/cliui
    
    the code of the file until where you have to start completion: package cliui

import (
	"encoding/json"
	"fmt"
	"strings"

	"github.com/coder/coder/v2/cli/clibase"
	"github.com/coder/coder/v2/codersdk"
	"github.com/coder/pretty"
)

func RichParameter(inv *clibase.Invocation, templateVersionParameter codersdk.TemplateVersionParameter) (string, error) {
	label := templateVersionParameter.Name
	if templateVersionParameter.DisplayName != "" {
		label = templateVersionParameter.DisplayName
	}

	if templateVersionParameter.Ephemeral {
		label += pretty.Sprint(DefaultStyles.Warn, " (build option)")
	}

	_, _ = fmt.Fprintln(inv.Stdout, Bold(label))

	if templateVersionParameter.DescriptionPlaintext != "" {
		_, _ = fmt.Fprintln(inv.Stdout, "  "+strings.TrimSpace(strings.Join(strings.Split(templateVersionParameter.DescriptionPlaintext, "\n"), "\n  "))+"\n")
	}

	var err error
	var value string
	if templateVersionParameter.Type == "list(string)" {
		// Move the cursor up a single line for nicer display!
		_, _ = fmt.Fprint(inv.Stdout, "\033[1A")

		var options []string
		err = json.Unmarshal([]byte(templateVersionParameter.DefaultValue), &options)
		if err !=
    
func RichParameter(inv *clibase.Invocation, templateVersionParameter codersdk.TemplateVersionParameter) (string, error) {
	label := templateVersionParameter.Name
	if templateVersionParameter.DisplayName != "" {
		label = templateVersionParameter.DisplayName
	}

	if templateVersionParameter.Ephemeral {
		label += pretty.Sprint(DefaultStyles.Warn, " (build option)")
	}

	_, _ = fmt.Fprintln(inv.Stdout, Bold(label))

	if templateVersionParameter.DescriptionPlaintext != "" {
		_, _ = fmt.Fprintln(inv.Stdout, "  "+strings.TrimSpace(strings.Join(strings.Split(templateVersionParameter.DescriptionPlaintext, "\n"), "\n  "))+"\n")
	}

	var err error
	var value string
	if templateVersionParameter.Type == "list(string)" {
		// Move the cursor up a single line for nicer display!
		_, _ = fmt.Fprint(inv.Stdout, "\033[1A")

		var options []string
		err = json.Unmarshal([]byte(templateVersionParameter.DefaultValue), &options)
		if err != nil {
			return "", err
		}

		values, err := MultiSelect(inv, options)
		if err == nil {
			v, err := json.Marshal(&values)
			if err != nil {
				return "", err
			}

			_, _ = fmt.Fprintln(inv.Stdout)
			pretty.Fprintf(
				inv.Stdout,
				DefaultStyles.Prompt, "%s\n", strings.Join(values, ", "),
			)
			value = string(v)
		}
	} else if len(templateVersionParameter.Options) > 0 {
		// Move the cursor up a single line for nicer display!
		_, _ = fmt.Fprint(inv.Stdout, "\033[1A")
		var richParameterOption *codersdk.TemplateVersionParameterOption
		richParameterOption, err = RichSelect(inv, RichSelectOptions{
			Options:    templateVersionParameter.Options,
			Default:    templateVersionParameter.DefaultValue,
			HideSearch: true,
		})
		if err == nil {
			_, _ = fmt.Fprintln(inv.Stdout)
			pretty.Fprintf(inv.Stdout, DefaultStyles.Prompt, "%s\n", richParameterOption.Name)
			value = richParameterOption.Value
		}
	} else {
		text := "Enter a value"
		if !templateVersionParameter.Required {
			text += fmt.Sprintf(" (default: %q)", templateVersionParameter.DefaultValue)
		}
		text += ":"

		value, err = Prompt(inv, PromptOptions{
			Text: Bold(text),
			Validate: func(value string) error {
				return validateRichPrompt(value, templateVersionParameter)
			},
		})
		value = strings.TrimSpace(value)
	}
	if err != nil {
		return "", err
	}

	// If they didn't specify anything, use the default value if set.
	if len(templateVersionParameter.Options) == 0 && value == "" {
		value = templateVersionParameter.DefaultValue
	}

	return value, nil
}