package main

import (
	"bytes"
	"embed"
	"text/template"
)

//go:embed templates/*.tmpl
var templateFS embed.FS

var tmpl = template.Must(template.ParseFS(templateFS, "templates/*.tmpl"))

type instanceConfig struct {
	Domain  string
	Contact string
}

func render(name string, cfg instanceConfig) (string, error) {
	var buf bytes.Buffer
	if err := tmpl.ExecuteTemplate(&buf, name, cfg); err != nil {
		return "", err
	}
	return buf.String(), nil
}

func renderConfigMap(cfg instanceConfig) (string, error) { return render("configmap.yaml.tmpl", cfg) }
func renderIngress(cfg instanceConfig) (string, error)   { return render("ingress.yaml.tmpl", cfg) }
func renderClusterIssuer(cfg instanceConfig) (string, error) {
	return render("clusterissuer.yaml.tmpl", cfg)
}

// manifestFiles are applied straight from the cloned source checkout, in
// this order — none of them need templating: deployment.yaml's image tag
// already matches VERSION in that same checkout (see INSTALL.md's fix for
// why that pairing matters), and the rest have no per-instance values.
// configmap.yaml and ingress.yaml are NOT in this list — those two are
// generated (see above) instead of applied from the checkout, since
// they're the only files with a domain/contact to fill in.
var manifestFiles = []string{
	"deploy/k8s/namespace.yaml",
	"deploy/k8s/pvc.yaml",
	"deploy/k8s/deployment.yaml",
	"deploy/k8s/service.yaml",
}