package api

import (
	"bytes"
	"encoding/json"
	"strings"
	"testing"

	"git.golem15.com/golem15/sm-faq-plugin/models"
	"git.golem15.com/golem15/summercms/modules/lagoon"
)

// TestFaqSerialize pins the D-17 response object without a database: the
// description and every answer pass through the sanitizer on output, clean
// HTML byte for byte; a null description stays null; questions are plain
// text (numbers formatted, null empty); content is never null; and the
// slug pattern the handler accepts.
func TestFaqSerialize(t *testing.T) {
	desc := `<p>About.</p><img src="/x.png" onerror="alert(1)">`
	faq := models.FAQ{Name: "Shipping", Slug: "shipping", Description: &desc, Content: lagoon.Jsonable[models.Content]{Valid: true, Data: models.Content{
		{"question": "How long?", "answer": "<p>Two <strong>days</strong> &amp; more.</p>"},
		{"question": 42.0, "answer": `<p onclick="x()">Here</p><script>alert(1)</script>`},
		{"question": nil, "answer": nil},
	}}}
	out := serialize(faq, "en")
	var buf bytes.Buffer
	enc := json.NewEncoder(&buf)
	enc.SetEscapeHTML(false)
	if err := enc.Encode(out); err != nil {
		t.Fatal(err)
	}
	raw := strings.TrimSuffix(buf.String(), "\n")
	want := `{"name":"Shipping","slug":"shipping","locale":"en","description":"<p>About.</p><img src=\"/x.png\">","content":[` +
		`{"question":"How long?","answer":"<p>Two <strong>days</strong> &amp; more.</p>"},` +
		`{"question":"42","answer":"<p>Here</p>"},` +
		`{"question":"","answer":""}]}`
	if raw != want {
		t.Fatalf("serialized:\n%s\nwant:\n%s", raw, want)
	}
	if strings.Contains(raw, "onerror") || strings.Contains(raw, "onclick") || strings.Contains(raw, "<script") {
		t.Fatal("unsafe HTML served")
	}
	bare := serialize(models.FAQ{Name: "Empty", Slug: "empty"}, "pl")
	if bare.Description != nil || bare.Content == nil || len(bare.Content) != 0 || bare.Locale != "pl" {
		t.Fatalf("bare = %+v", bare)
	}
	for slug, ok := range map[string]bool{
		"shipping": true, "a": true, "faq-2": true, "2024-faq": true,
		"Shipping": false, "-faq": false, "faq_2": false, "faq.json": false, "zażółć": false, "": false, "a b": false,
	} {
		if slugPattern.MatchString(slug) != ok {
			t.Errorf("slug %q accepted = %v", slug, !ok)
		}
	}
}