package rotater

import (
	"os"
	"path"
	"log"
	"amuz.es/src/infra/goutils/logger"
)

var loggers logger.RotateSyncerSet

func NewLogWriter(FileName string, MaxSizeMb, MaxBackup, MaxDay int, logDir string) logger.RotateSyncer {
	switch FileName {
	case "Stdout":
		return newLocked(os.Stdout)
	case "Stderr":
		return newLocked(os.Stderr)
	default:
		logpath := FileName
		if logDir != "" {
			logpath = path.Join(logDir, FileName)
		}

		log.Println(" Attention!! log writes to ", logpath)

		logWriter := newRotater(
			logpath,
			MaxSizeMb, // megabytes
			MaxBackup,
			MaxDay, //days
		)
		loggers.Store(logWriter)
		logWriter.SetOnClose(func() { loggers.Delete(logWriter) })
		return logWriter
	}
}

func Rotate() {
	loggers.Range(func(rotater logger.RotateSyncer) {
		rotater.Sync()
		rotater.Rotate()
	})
	log.Println("rotated")
}

func Close() {
	loggers.Range(func(rotater logger.RotateSyncer) {
		rotater.Sync()
		rotater.Close()
	})
	log.Println("end of log")
}