package pongo

import (
	"strings"
	"testing"
	"testing/fstest"

	"git.dev.alexdunmow.com/block/core/templates"
)

func TestNonPanickingCompileVariants(t *testing.T) {
	fsys := fstest.MapFS{
		"templates/theme/default.ninjatpl":           {Data: []byte(`<main>{{ slots.main|safe }}</main>`)},
		"templates/overrides/theme/heading.ninjatpl": {Data: []byte(`<h2>{{ text }}</h2>`)},
		"templates/email/theme.ninjatpl":             {Data: []byte(`<table>{{ body|safe }} {{ colors.mutedForeground }}</table>`)},
		"templates/broken.ninjatpl":                  {Data: []byte(`{% if %}`)},
	}
	e := NewEngine(fsys)

	if _, err := e.PageTemplate("templates/theme/default.ninjatpl"); err != nil {
		t.Fatalf("PageTemplate: %v", err)
	}
	bf, err := e.BlockTemplate("templates/overrides/theme/heading.ninjatpl")
	if err != nil {
		t.Fatalf("BlockTemplate: %v", err)
	}
	if got := bf(t.Context(), map[string]any{"text": "hi"}); got != "<h2>hi</h2>" {
		t.Errorf("override render = %q", got)
	}
	ef, err := e.EmailWrapper("templates/email/theme.ninjatpl")
	if err != nil {
		t.Fatalf("EmailWrapper: %v", err)
	}
	ectx := templates.EmailContext{}
	ectx.Colors.MutedForeground = "#6c5b35"
	if got := ef("<p>x</p>", ectx); got != "<table><p>x</p> #6c5b35</table>" {
		t.Errorf("email render = %q", got)
	}

	// Malformed templates return errors — no panic (hot-install safety).
	if _, err := e.PageTemplate("templates/broken.ninjatpl"); err == nil {
		t.Error("PageTemplate on broken template: want error")
	}
	if _, err := e.BlockTemplate("templates/missing.ninjatpl"); err == nil {
		t.Error("BlockTemplate on missing file: want error")
	}
}

func TestLinesFilter(t *testing.T) {
	fsys := fstest.MapFS{
		"t.ninjatpl": {Data: []byte(`{% for l in address|lines %}<div>{{ l }}</div>{% endfor %}`)},
	}
	e := NewEngine(fsys)
	bf, err := e.BlockTemplate("t.ninjatpl")
	if err != nil {
		t.Fatal(err)
	}
	got := bf(t.Context(), map[string]any{"address": "1 Meridian Plaza\r\n  Floor 2  \n\nNew Gotham"})
	want := "<div>1 Meridian Plaza</div><div>Floor 2</div><div>New Gotham</div>"
	if got != want {
		t.Errorf("lines render = %q, want %q", got, want)
	}
	if strings.Contains(got, "\n") {
		t.Error("unexpected raw newline in output")
	}
}