package messages

import (
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestRender_Defaults(t *testing.T) {
	t.Setenv("HOME", t.TempDir())
	tpl, err := Load(filepath.Join(t.TempDir(), "missing.yaml"))
	if err != nil {
		t.Fatalf("load defaults: %v", err)
	}
	out, err := tpl.Render("welcome", map[string]string{
		"username":     "alice",
		"domain":       "azzamo.net",
		"expires_at":   "2027-01-01",
		"npub":         "npub1xxx",
		"frontend_url": "https://azzamo.net/nip05",
	})
	if err != nil {
		t.Fatalf("render: %v", err)
	}
	if !strings.Contains(out, "alice@azzamo.net") {
		t.Errorf("rendered: %q", out)
	}
}

func TestRender_EmptyDisables(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "messages.yaml")
	if err := os.WriteFile(path, []byte("welcome: \"\"\nextended: hi {username}\n"), 0o644); err != nil {
		t.Fatal(err)
	}
	tpl, err := Load(path)
	if err != nil {
		t.Fatal(err)
	}
	out, err := tpl.Render("welcome", map[string]string{"username": "bob"})
	if err != nil {
		t.Fatalf("render welcome: %v", err)
	}
	if out != "" {
		t.Errorf("empty template should render empty, got %q", out)
	}
	out2, _ := tpl.Render("extended", map[string]string{"username": "bob"})
	if out2 != "hi bob" {
		t.Errorf("extended got %q", out2)
	}
}

func TestRender_UnknownEvent(t *testing.T) {
	tpl, err := Load(filepath.Join(t.TempDir(), "missing.yaml"))
	if err != nil {
		t.Fatal(err)
	}
	if _, err := tpl.Render("does_not_exist", nil); err == nil {
		t.Error("expected error for unknown event")
	}
}