package logger

import (
	"fmt"
	"log/slog"
	"os"
	"path/filepath"
	"sync"
)

var (
	Logger *slog.Logger
	once   sync.Once
)

func Init(logFilePath string, logLevel slog.Level) error {
	logDir := filepath.Dir(logFilePath)
	if _, err := os.Stat(logDir); os.IsNotExist(err) {
		err := os.MkdirAll(logDir, 0755)
		if err != nil {
			return err
		}
	}

	logFile, err := os.OpenFile(logFilePath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
	if err != nil {
		return err
	}

	opts := &slog.HandlerOptions{
		Level: logLevel,
	}

	fileHandler := slog.NewJSONHandler(logFile, opts)
	Logger = slog.New(fileHandler)

	return nil
}

func GetChildLogger(name string) *slog.Logger {
	once.Do(func() {
		configDir, err := os.UserConfigDir()
		if err != nil {
			fmt.Printf("error getting User Condfig Dir: %v\n", err)
		}
		logDir := filepath.Join(configDir, "jws_gui", "logs")
		if Logger == nil {
			defaultLogFilePath := filepath.Join(logDir, "jws_gui.log")
			defaultLogLevel := slog.LevelInfo
			Init(defaultLogFilePath, defaultLogLevel)
		}
	})
	return Logger.With("package", name)
}