package pike

import ( "errors" "os" "strings"

"github.com/rs/zerolog/log"

)

// Readme Updates a README.md file. func Readme(dirName string, output string, init bool, autoAppend bool) error { file := dirName + "/README.md"

if _, err := os.Stat(file); errors.Is(err, os.ErrNotExist) {
	return err
}

OutPolicy, err2 := MakePolicy(dirName, nil, init, false)
if err2 != nil {
	log.Print("failed to make policy")

	return err2
}

var markdown string

switch strings.ToLower(output) {
case terraform:
	markdown = "\nThe Terraform resource required is:\n\n```golang\n" + OutPolicy.AsString(output) + "\n```\n"
case "json":
	markdown = "\nThe Policy required is:\n\n```json\n" + OutPolicy.AsString(output) + "\n```\n"
default:
	return errors.New("output formats are terraform or json")
}

err := ReplaceSection(file, markdown, autoAppend)

log.Print("readme updated")

return err

}