package keylog

import (
	"fmt"
	"path/filepath"
	"regexp"
	"strings"
	"time"
)

const hourBucketLayout = "2006-01-02-15"

var logFilenamePattern = regexp.MustCompile(`^\d{4}-\d{2}-\d{2}-\d{2}\.log$`)

func HourBucket(t time.Time) string {
	return t.Local().Format(hourBucketLayout)
}

func LogFilename(bucket string) string {
	return bucket + ".log"
}

func ValidLogFilename(name string) bool {
	return logFilenamePattern.MatchString(filepath.Base(name))
}

func normalizeWindow(window string) string {
	window = strings.TrimSpace(window)
	if window == "" {
		return "?"
	}
	return window
}

func eventSource(injected bool) string {
	if injected {
		return "injected"
	}
	return "user"
}

func sectionHeader(source, window string) string {
	return fmt.Sprintf("[%s · %s]\n", source, normalizeWindow(window))
}