package spectre

import "strings"

func site(userKey []byte, scoper Scoper, siteName string, opts ...SiteOption) string {
	siteOpts := &options{
		template: "",
		counter:  1,
		scope:    Authentication,
	}
	for _, opt := range opts {
		opt(siteOpts)
	}

	if siteOpts.template == "" {
		siteOpts.template = siteOpts.scope.DefaultTemplate()
	}

	siteKey := siteKey(userKey, scoper, siteName, siteOpts.counter, siteOpts.scope)

	templateSet := templates[siteOpts.template]
	template := templateSet[int(siteKey[0])%len(templateSet)]

	var out strings.Builder
	for idx, b := range template {
		chars := characters[string(b)]
		char := chars[int(siteKey[idx+1])%len(chars)]
		out.WriteByte(char)
	}
	return out.String()
}