package preview

import (
	"html/template"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"gitea-mail-templates/tools/config"
)

// Gitea 28 removes FileSize, so render an attachment in every release theme.
func TestReleaseAttachmentsGitea28(t *testing.T) {
	if _, ok := TemplateFuncs["FileSize"]; ok {
		t.Fatal("FileSize is not available in Gitea 28 mail templates")
	}
	cfg, err := config.Load(filepath.Join("..", "data", "templates_config.json"))
	if err != nil {
		t.Fatal(err)
	}
	data := cfg.Templates["release"].Params
	data["locale"] = Locale{}
	markSafeHTML(data)

	themesDir := filepath.Join("..", "..", "themes")
	themes, err := os.ReadDir(themesDir)
	if err != nil {
		t.Fatal(err)
	}
	for _, theme := range themes {
		if !theme.IsDir() {
			continue
		}
		t.Run(theme.Name(), func(t *testing.T) {
			content, err := os.ReadFile(filepath.Join(themesDir, theme.Name(), "mail", "repo", "release.tmpl"))
			if err != nil {
				t.Fatal(err)
			}
			tmpl, err := template.New("release").Funcs(TemplateFuncs).Parse(string(content))
			if err != nil {
				t.Fatal(err)
			}
			var rendered strings.Builder
			if err := tmpl.Execute(&rendered, data); err != nil {
				t.Fatal(err)
			}
			if !strings.Contains(rendered.String(), "release-notes.txt") || !strings.Contains(rendered.String(), "1.5 KiB") {
				t.Fatal("release attachment or formatted size missing from email")
			}
		})
	}
}