package app

import (
	"fmt"
	"io"
	"log/slog"
	"os"
	"strings"
	"time"
)

var (
	logFile *os.File
)

func newLogger(environment string) {
	if err := os.MkdirAll("logs", 0755); err != nil {
		fmt.Println("error creating logs directory:", err)
		return
	}

	now := time.Now().Format("2006-01-02")
	f, err := os.OpenFile(fmt.Sprintf("logs/log%s.log", now), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
	if err != nil {
		fmt.Println("error opening log file:", err)
		return
	}

	var level slog.Level
	var addSource bool

	switch strings.ToLower(environment) {
	case "dev":
		level = slog.LevelDebug // -4
		addSource = true
	case "prod":
		level = slog.LevelInfo // 0
		addSource = false
	default:
		level = slog.LevelInfo
		addSource = false
	}

	mw := io.MultiWriter(os.Stdout, f)
	logger := slog.New(slog.NewTextHandler(mw, &slog.HandlerOptions{
		AddSource: addSource,
		Level:     level,
	}))

	if logFile != nil {
		logFile.Close()
	}

	logFile = f
	slog.SetDefault(logger)
}

func startRotativeLogger(environment string) {
	newLogger(environment)

	ticker := time.NewTicker(time.Hour * 24)
	go func() {
		for range ticker.C {
			newLogger(environment)
		}
	}()
}