package opslog

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

type Logger struct {
	dir string
	mu  sync.Mutex
}

func New(dir string) *Logger {
	if dir == "" {
		return nil
	}
	return &Logger{dir: dir}
}

func (l *Logger) Write(ip, user, action string) error {
	if l == nil || l.dir == "" {
		return nil
	}
	l.mu.Lock()
	defer l.mu.Unlock()
	if err := os.MkdirAll(l.dir, 0755); err != nil {
		return err
	}
	f, err := os.OpenFile(filepath.Join(l.dir, "ops.log"), os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
	if err != nil {
		return err
	}
	defer f.Close()
	_, err = fmt.Fprintf(f, "%s - %s - user(%s) %s\n", time.Now().Format("2006-01-02 15:04:05"), ip, user, action)
	return err
}