package clipmon

import (
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

func TestFormatLine(t *testing.T) {
	t.Parallel()
	when := time.Date(2026, 8, 28, 13, 4, 5, 0, time.UTC)
	line := formatLine(Event{Time: when, Kind: "text", Text: "hello"})
	if !strings.Contains(line, "[text]") || !strings.Contains(line, "hello") {
		t.Fatalf("formatLine text = %q", line)
	}
	img := formatLine(Event{Time: when, Kind: "image", ImagePath: "images/ab.png"})
	if !strings.Contains(img, "[image] images/ab.png") {
		t.Fatalf("formatLine image = %q", img)
	}
}

func TestWriterHourly(t *testing.T) {
	dir := t.TempDir()
	w, err := NewWriter(dir)
	if err != nil {
		t.Fatalf("NewWriter: %v", err)
	}
	when := time.Date(2026, 8, 28, 13, 0, 0, 0, time.Local)
	if err := w.Write(Event{Time: when, Kind: "text", Text: "copied"}); err != nil {
		t.Fatalf("Write: %v", err)
	}
	_ = w.Close()

	data, err := os.ReadFile(filepath.Join(dir, LogFilename(HourBucket(when))))
	if err != nil {
		t.Fatalf("read log: %v", err)
	}
	if !strings.Contains(string(data), "copied") {
		t.Fatalf("log = %q", data)
	}
}

func TestSavePNG(t *testing.T) {
	dir := t.TempDir()
	w, err := NewWriter(dir)
	if err != nil {
		t.Fatalf("NewWriter: %v", err)
	}
	rel, err := w.SavePNG([]byte{0x89, 'P', 'N', 'G', 0, 0, 0})
	if err != nil {
		t.Fatalf("SavePNG: %v", err)
	}
	if !strings.HasPrefix(rel, "images/") {
		t.Fatalf("rel = %q", rel)
	}
}