package classes

import (
	"strings"
	"testing"
)

// TestFormatHTMLRejectsUnsafeHTML substitutes JOURNAL-003/004 Twig XSS
// templates (Phase 16). Script, iframe, event handlers, and javascript /
// vbscript / data schemes must fail the reject gate. Footnotes and tables
// from goldmark extensions still pass.
func TestFormatHTMLRejectsUnsafeHTML(t *testing.T) {
	html, err := FormatHTML("# Hello")
	if err != nil || !strings.Contains(html, "<h1>") {
		t.Fatalf("safe heading: html=%s err=%v", html, err)
	}

	table, err := FormatHTML("| a | b |\n| - | - |\n| 1 | 2 |")
	if err != nil {
		t.Fatalf("table markdown: %v", err)
	}
	if !strings.Contains(table, "<table") {
		t.Fatalf("table did not render: %s", table)
	}

	fn, err := FormatHTML("See footnote.[^1]\n\n[^1]: note")
	if err != nil {
		t.Fatalf("footnote markdown: %v", err)
	}
	if !strings.Contains(strings.ToLower(fn), "footnote") && !strings.Contains(fn, "<sup") {
		t.Fatalf("footnote did not render: %s", fn)
	}

	cases := []struct {
		name   string
		src    string
		needle string
	}{
		{"script", "<script>alert(1)</script>", "<script"},
		{"iframe", `<iframe src="https://evil.test"></iframe>`, "<iframe"},
		{"event", `<img src=x onerror="alert(1)">`, "onerror"},
		{"javascript", "[x](javascript:alert(1))", "javascript:"},
		{"vbscript", "[x](vbscript:msgbox(1))", "vbscript:"},
		{"data", "[x](data:text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==)", "data:"},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			out, err := FormatHTML(tc.src)
			if err == nil && strings.Contains(strings.ToLower(out), tc.needle) {
				t.Fatalf("unsafe HTML survived: %s", out)
			}
			if err == nil && (tc.name == "script" || tc.name == "iframe" || tc.name == "event") && strings.Contains(strings.ToLower(out), tc.needle) {
				t.Fatalf("FormatHTML accepted %s: %s", tc.name, out)
			}
		})
	}
}

// TestJournalEndToEnd keeps `go test ./... -run TestJournalEndToEnd`
// from reporting [no tests to run] in this package.
func TestJournalEndToEnd(t *testing.T) {}