package main

import (
	"fmt"
	"os"
	"path/filepath"
	"time"
)

// WriteDebugLog appends a line to <vault>/.verstak/debug.log.
// Called from frontend to log JS-side diagnostics in production GUI builds.
func (a *App) WriteDebugLog(msg string) {
	if !a.IsReady() {
		return
	}
	logPath := filepath.Join(a.vault, ".verstak", "debug.log")
	line := fmt.Sprintf("[%s] %s\n", time.Now().Format("2006-01-02T15:04:05"), msg)
	f, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o644)
	if err != nil {
		return
	}
	defer f.Close()
	f.WriteString(line)
}