package log

import (
	"fmt"
	"io"
	"os"
	"path"
	"path/filepath"
	"strconv"
	"strings"
	"time"

	"next-terminal/server/config"

	"github.com/labstack/echo/v4"
	"github.com/sirupsen/logrus"
	"gopkg.in/natefinch/lumberjack.v2"
)

type Formatter struct{}

func (s *Formatter) Format(entry *logrus.Entry) ([]byte, error) {
	timestamp := time.Now().Local().Format("2006-01-02 15:04:05")
	var file string
	var l int
	if entry.HasCaller() {
		file = filepath.Base(entry.Caller.Function)
		l = entry.Caller.Line
	}

	msg := fmt.Sprintf("%s %s [%s:%d]%s\n", timestamp, strings.ToUpper(entry.Level.String()), file, l, entry.Message)
	return []byte(msg), nil
}

var stdOut = NewLogger()

// Trace logs a message at level Trace on the standard logger.
func Trace(args ...interface{}) {
	stdOut.Trace(args...)
}

// Debug logs a message at level Debug on the standard logger.
func Debug(args ...interface{}) {
	stdOut.Debug(args...)
}

// Print logs a message at level Info on the standard logger.
func Print(args ...interface{}) {
	stdOut.Print(args...)
}

// Info logs a message at level Info on the standard logger.
func Info(args ...interface{}) {
	stdOut.Info(args...)
}

// Warn logs a message at level Warn on the standard logger.
func Warn(args ...interface{}) {
	stdOut.Warn(args...)
}

// Warning logs a message at level Warn on the standard logger.
func Warning(args ...interface{}) {
	stdOut.Warning(args...)
}

// Error logs a message at level Error on the standard logger.
func Error(args ...interface{}) {
	stdOut.Error(args...)
}

// Panic logs a message at level Panic on the standard logger.
func Panic(args ...interface{}) {
	stdOut.Panic(args...)
}

// Fatal logs a message at level Fatal on the standard logger then the process will exit with status set to 1.
func Fatal(args ...interface{}) {
	stdOut.Fatal(args...)
}

// Tracef logs a message at level Trace on the standard logger.
func Tracef(format string, args ...interface{}) {
	stdOut.Tracef(format, args...)
}

// Debugf logs a message at level Debug on the standard logger.
func Debugf(format string, args ...interface{}) {
	stdOut.Debugf(format, args...)
}

// Printf logs a message at level Info on the standard logger.
func Printf(format string, args ...interface{}) {
	stdOut.Printf(format, args...)
}

// Infof logs a message at level Info on the standard logger.
func Infof(format string, args ...interface{}) {
	stdOut.Infof(format, args...)
}

// Warnf logs a message at level Warn on the standard logger.
func Warnf(format string, args ...interface{}) {
	stdOut.Warnf(format, args...)
}

// Warningf logs a message at level Warn on the standard logger.
func Warningf(format string, args ...interface{}) {
	stdOut.Warningf(format, args...)
}

// Errorf logs a message at level Error on the standard logger.
func Errorf(format string, args ...interface{}) {
	stdOut.Errorf(format, args...)
}

// Panicf logs a message at level Panic on the standard logger.
func Panicf(format string, args ...interface{}) {
	stdOut.Panicf(format, args...)
}

// Fatalf logs a message at level Fatal on the standard logger then the process will exit with status set to 1.
func Fatalf(format string, args ...interface{}) {
	stdOut.Fatalf(format, args...)
}

// Traceln logs a message at level Trace on the standard logger.
func Traceln(args ...interface{}) {
	stdOut.Traceln(args...)
}

// Debugln logs a message at level Debug on the standard logger.
func Debugln(args ...interface{}) {
	stdOut.Debugln(args...)
}

// Println logs a message at level Info on the standard logger.
func Println(args ...interface{}) {
	stdOut.Println(args...)
}

// Infoln logs a message at level Info on the standard logger.
func Infoln(args ...interface{}) {
	stdOut.Infoln(args...)
}

// Warnln logs a message at level Warn on the standard logger.
func Warnln(args ...interface{}) {
	stdOut.Warnln(args...)
}

// Warningln logs a message at level Warn on the standard logger.
func Warningln(args ...interface{}) {
	stdOut.Warningln(args...)
}

// Errorln logs a message at level Error on the standard logger.
func Errorln(args ...interface{}) {
	stdOut.Errorln(args...)
}

// Panicln logs a message at level Panic on the standard logger.
func Panicln(args ...interface{}) {
	stdOut.Panicln(args...)
}

// Fatalln logs a message at level Fatal on the standard logger then the process will exit with status set to 1.
func Fatalln(args ...interface{}) {
	stdOut.Fatalln(args...)
}

// WithError creates an entry from the standard logger and adds an error to it, using the value defined in ErrorKey as key.
func WithError(err error) *logrus.Entry {
	return stdOut.WithField(logrus.ErrorKey, err)
}

// WithField creates an entry from the standard logger and adds a field to
// it. If you want multiple fields, use `WithFields`.
//
// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
// or Panic on the Entry it returns.
func WithField(key string, value interface{}) *logrus.Entry {
	return stdOut.WithField(key, value)
}

// Logrus : implement log
type Logrus struct {
	*logrus.Logger
}

// GetEchoLogger for e.l
func NewLogger() Logrus {
	logFilePath := ""
	if dir, err := os.Getwd(); err == nil {
		logFilePath = dir + "/logs/"
	}
	if err := os.MkdirAll(logFilePath, 0755); err != nil {
		fmt.Println(err.Error())
	}
	logFileName := "next-terminal.log"
	//日志文件
	fileName := path.Join(logFilePath, logFileName)
	if _, err := os.Stat(fileName); err != nil {
		if _, err := os.Create(fileName); err != nil {
			fmt.Println(err.Error())
		}
	}

	//实例化
	logger := logrus.New()
	//设置输出
	logger.SetOutput(io.MultiWriter(&lumberjack.Logger{
		Filename:   fileName,
		MaxSize:    100, // megabytes
		MaxBackups: 3,
		MaxAge:     7,    //days
		Compress:   true, // disabled by default
	}, os.Stdout))
	logger.SetReportCaller(true)
	//设置日志级别
	if config.GlobalCfg.Debug {
		logger.SetLevel(logrus.DebugLevel)
	} else {
		logger.SetLevel(logrus.InfoLevel)
	}
	//设置日志格式
	logger.SetFormatter(new(Formatter))
	return Logrus{Logger: logger}
}

func logrusMiddlewareHandler(c echo.Context, next echo.HandlerFunc) error {
	l := NewLogger()
	req := c.Request()
	res := c.Response()
	start := time.Now()
	if err := next(c); err != nil {
		c.Error(err)
	}
	stop := time.Now()

	l.Debugf("%s %s %s %s %s %3d %s %13v %s %s",
		c.RealIP(),
		req.Host,
		req.Method,
		req.RequestURI,
		req.URL.Path,
		res.Status,
		strconv.FormatInt(res.Size, 10),
		stop.Sub(start).String(),
		req.Referer(),
		req.UserAgent(),
	)

	return nil
}

func logger(next echo.HandlerFunc) echo.HandlerFunc {
	return func(c echo.Context) error {
		return logrusMiddlewareHandler(c, next)
	}
}

// Hook is a function to process log.
func Hook() echo.MiddlewareFunc {
	return logger
}