package logging

import (
	"fmt"
	"io"
	"log"
	"os"
	"path/filepath"
	"runtime"
	"time"

	"tmr-watch/conf/setting"
	"tmr-watch/pkg/file"

	"github.com/gin-gonic/gin"
)

type Level int

var (
	F *os.File

	DefaultPrefix      = ""
	DefaultCallerDepth = 2
	DefaultPath        string

	logger     *log.Logger
	logPrefix  = ""
	levelFlags = []string{"DEBUG", "INFO", "WARN", "ERROR", "FATAL"}
)

const (
	DEBUG Level = iota
	INFO
	WARNING
	ERROR
	FATAL
)

func Setup() {
	var err error
	filePath := fmt.Sprintf("./%s", getLogFilePath(setting.AppSetting.RuntimeRootPath, setting.AppSetting.LogSavePath))
	fileName := getLogFileName(setting.AppSetting.LogSaveName, setting.AppSetting.TimeFormat, setting.AppSetting.LogFileExt)
	F, err = file.MustOpen(fileName, filePath)
	if err != nil {
		log.Fatalf("logging.Setup err: %v", err)
	}
	logger = log.New(F, DefaultPrefix, log.LstdFlags)
	gin.DefaultWriter = io.MultiWriter(F, logger.Writer())
	go func() {
		defer func() {
			if err := recover(); err != nil {
				log.Fatalf("logging.recover err: %v", err)
			}
		}()
		tchan := time.Tick(24 * time.Hour)
		for {
			select {
			case <-tchan:
				F.Close()
				F, err = file.MustOpen(fileName, filePath)
				if err != nil {
					log.Fatalf("logging.Setup err: %v", err)
				}

				logger = log.New(F, DefaultPrefix, log.LstdFlags)
				gin.DefaultWriter = io.MultiWriter(F, logger.Writer())
			}
		}
	}()
}

func Printf(format string, v ...interface{}) {
	setPrefix(INFO)
	logger.Printf(format, v)
}

func Println(v ...interface{}) {
	setPrefix(INFO)
	logger.Println(v)
}

func Debug(v ...interface{}) {
	setPrefix(DEBUG)
	logger.Println(v)
}

func Info(v ...interface{}) {
	setPrefix(INFO)
	logger.Println(v)
}

func Warn(v ...interface{}) {
	setPrefix(WARNING)
	logger.Println(v)
}

func Error(v ...interface{}) {
	setPrefix(ERROR)
	logger.Println(v)
}

func Fatal(v ...interface{}) {
	setPrefix(FATAL)
	logger.Fatalln(v)
}

func setPrefix(level Level) {
	_, file, line, ok := runtime.Caller(DefaultCallerDepth)
	if ok {
		logPrefix = fmt.Sprintf("[%s][%s:%d]", levelFlags[level], filepath.Base(file), line)
	} else {
		logPrefix = fmt.Sprintf("[%s]", levelFlags[level])
	}

	logger.SetPrefix(logPrefix)
}