Test

package render

import (
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestRenderMarkdown(t *testing.T) {
	cases := []struct {
		name     string
		markdown string
		want     string
	}{
		{
			name: "Markdown, no link",
			markdown: `# Test

## 01/24/26 09:14:20 - some entry
check this out`,
			want: `<h1>Test</h1><h2>01/24/26 09:14:20 - some entry</h2><p>check this out</p>`,
		},
		{
			name: "Markdown, some link",
			markdown: `# Test 2
## 01/24/26 09:14:20 - some entry (bare link)
Check this out http://tatata.toto here
`,
			want: `<h1>Test 2</h1><h2>01/24/26 09:14:20 - some entry (bare link)</h2><p>Check this out <a href="http://tatata.toto" target="_blank">http://tatata.toto</a> here</p>`,
		},
		{
			name: "Markdown, some link with description",
			markdown: `# Test 2
## 01/24/26 09:14:20 - some entry (bare link)
Check this out [here](http://tatata.toto)
`,
			want: `<h1>Test 2</h1><h2>01/24/26 09:14:20 - some entry (bare link)</h2><p>Check this out <a href="http://tatata.toto" target="_blank">here</a></p>`,
		},
	}

	for _, test := range cases {
		got, err := RenderMarkdown([]byte(test.markdown))
		if err != nil {
			t.Errorf("Error rendering markdown: '%s'\n", err)
		}
		strip := strings.ReplaceAll(string(got), "\n", "")
		strip = strings.Trim(strip, " ")

		if strip != test.want {
			t.Errorf("Rendering markdown: Wanted '%s', got '%s'.\n", test.want, strip)
		}
	}
}

func TestTemplateManagerGetTemplate_Caches(t *testing.T) {
	baseDir := t.TempDir()
	writeTemplate(t, baseDir, "base.tmpl", `{{ define "base" }}base{{ end }}`)
	writeTemplate(t, baseDir, "index.tmpl", `{{ define "content" }}index{{ end }}`)

	tm := NewTemplateManager(baseDir)
	td := &TemplateData{
		Name:        "index",
		FileNameSet: []string{"base", "index"},
	}

	first, err := tm.GetTemplate(td)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	second, err := tm.GetTemplate(td)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	if first != second {
		t.Fatalf("expected cached template instance")
	}
}

func TestTemplateManagerGetTemplate_Missing(t *testing.T) {
	baseDir := t.TempDir()
	tm := NewTemplateManager(baseDir)

	td := &TemplateData{
		Name:        "missing",
		FileNameSet: []string{"missing"},
	}

	if _, err := tm.GetTemplate(td); err == nil {
		t.Fatalf("expected error for missing template")
	}
}

func TestTemplateManagerRender(t *testing.T) {
	baseDir := t.TempDir()
	writeTemplate(t, baseDir, "base.tmpl", `{{ define "base" }}<html>{{ template "content" . }}</html>{{ end }}`)
	writeTemplate(t, baseDir, "noteList.tmpl", `{{ define "noteList" }}notes{{ end }}`)
	writeTemplate(t, baseDir, "metadata.tmpl", `{{ define "metadata" }}meta{{ end }}`)
	writeTemplate(t, baseDir, "index.tmpl", `{{ define "content" }}hello{{ end }}`)
	writeTemplate(t, baseDir, "metadata.tmpl", `{{ define "noteList" }}notes{{ end }}`)

	tm := NewTemplateManager(baseDir)
	rec := httptest.NewRecorder()

	err := tm.Render(rec, "index", map[string]string{"msg": "hi"})
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	if ct := rec.Header().Get("Content-Type"); ct != "text/html; charset=utf-8" {
		t.Fatalf("expected content-type text/html; charset=utf-8, got %q", ct)
	}

	if rec.Code != http.StatusOK {
		t.Fatalf("expected status 200, got %d", rec.Code)
	}

	if !strings.Contains(rec.Body.String(), "hello") {
		t.Fatalf("expected rendered template content")
	}
}

func TestTemplateManagerRender_MissingTemplate(t *testing.T) {
	baseDir := t.TempDir()
	writeTemplate(t, baseDir, "base.tmpl", `{{ define "base" }}<html>{{ template "content" . }}</html>{{ end }}`)
	writeTemplate(t, baseDir, "noteList.tmpl", `{{ define "noteList" }}notes{{ end }}`)
	writeTemplate(t, baseDir, "metadata.tmpl", `{{ define "metadata" }}meta{{ end }}`)
	writeTemplate(t, baseDir, "metadata.tmpl", `{{ define "noteList" }}notes{{ end }}`)

	tm := NewTemplateManager(baseDir)
	rec := httptest.NewRecorder()

	if err := tm.Render(rec, "index", nil); err == nil {
		t.Fatalf("expected error for missing template")
	}
}

func writeTemplate(t *testing.T, dir, name, contents string) {
	t.Helper()

	path := filepath.Join(dir, name)
	if err := os.WriteFile(path, []byte(contents), 0o600); err != nil {
		t.Fatalf("write template %s: %v", name, err)
	}
}