package util

import (
	"encoding/json"
	"fmt"
	"github.com/labstack/gommon/log"
	"io"
	"os"
	sorbetLog "sorbet/pkg/log"
)

type EchoLogger struct {
	l sorbetLog.Logger
}

func NewLogger() *EchoLogger {
	return NewCustomLogger(sorbetLog.Default())
}

func NewCustomLogger(l sorbetLog.Logger) *EchoLogger {
	return &EchoLogger{l}
}

func (l *EchoLogger) Output() io.Writer {
	return l.l.Writer()
}

func (l *EchoLogger) SetOutput(w io.Writer) {
	l.l.SetWriter(w)
}

func (l *EchoLogger) Prefix() string {
	return ""
}

func (l *EchoLogger) SetPrefix(_ string) {
	// FIXME(hupeh): 能否使用 WithGroup 或者 Attr 实现？
	fmt.Println("cannot set a prefix into logging")
}

func (l *EchoLogger) Level() log.Lvl {
	switch v := l.l.Level(); v {
	case sorbetLog.LevelDebug, sorbetLog.LevelTrace:
		return log.DEBUG
	case sorbetLog.LevelInfo:
		return log.INFO
	case sorbetLog.LevelWarn:
		return log.WARN
	case sorbetLog.LevelError:
		return log.ERROR
	case sorbetLog.LevelOff:
		return log.OFF
	case sorbetLog.LevelFatal:
		return log.Lvl(7)
	default:
		if v < sorbetLog.LevelTrace {
			return log.DEBUG
		} else {
			return log.Lvl(7)
		}
	}
}

func (l *EchoLogger) SetLevel(v log.Lvl) {
	switch v {
	case log.DEBUG:
		l.l.SetLevel(sorbetLog.LevelDebug)
	case log.INFO:
		l.l.SetLevel(sorbetLog.LevelInfo)
	case log.WARN:
		l.l.SetLevel(sorbetLog.LevelWarn)
	case log.ERROR:
		l.l.SetLevel(sorbetLog.LevelError)
	case log.OFF:
		l.l.SetLevel(sorbetLog.LevelOff)
	}
}

func (l *EchoLogger) SetHeader(_ string) {
	fmt.Println("cannot set a header into logging")
}

func (l *EchoLogger) Print(i ...interface{}) {
	l.log(l.l.Level(), i...)
}

func (l *EchoLogger) Printf(format string, args ...interface{}) {
	l.logf(l.l.Level(), format, args...)
}

func (l *EchoLogger) Printj(j log.JSON) {
	l.logj(l.l.Level(), j)
}

func (l *EchoLogger) Debug(i ...interface{}) {
	l.log(sorbetLog.LevelDebug, i...)
}

func (l *EchoLogger) Debugf(format string, args ...interface{}) {
	l.logf(sorbetLog.LevelDebug, format, args...)
}

func (l *EchoLogger) Debugj(j log.JSON) {
	l.logj(sorbetLog.LevelDebug, j)
}

func (l *EchoLogger) Info(i ...interface{}) {
	l.log(sorbetLog.LevelInfo, i...)
}

func (l *EchoLogger) Infof(format string, args ...interface{}) {
	l.logf(sorbetLog.LevelInfo, format, args...)
}

func (l *EchoLogger) Infoj(j log.JSON) {
	l.logj(sorbetLog.LevelInfo, j)
}

func (l *EchoLogger) Warn(i ...interface{}) {
	l.log(sorbetLog.LevelWarn, i...)
}

func (l *EchoLogger) Warnf(format string, args ...interface{}) {
	l.logf(sorbetLog.LevelInfo, format, args...)
}

func (l *EchoLogger) Warnj(j log.JSON) {
	l.logj(sorbetLog.LevelWarn, j)
}

func (l *EchoLogger) Error(i ...interface{}) {
	l.log(sorbetLog.LevelError, i...)
}

func (l *EchoLogger) Errorf(format string, args ...interface{}) {
	l.logf(sorbetLog.LevelError, format, args...)
}

func (l *EchoLogger) Errorj(j log.JSON) {
	l.logj(sorbetLog.LevelError, j)
}

func (l *EchoLogger) Fatal(i ...interface{}) {
	l.log(sorbetLog.LevelFatal, i...)
	os.Exit(1)
}

func (l *EchoLogger) Fatalj(j log.JSON) {
	l.logj(sorbetLog.LevelFatal, j)
	os.Exit(1)
}

func (l *EchoLogger) Fatalf(format string, args ...interface{}) {
	l.logf(sorbetLog.LevelFatal, format, args...)
	os.Exit(1)
}

func (l *EchoLogger) Panic(i ...interface{}) {
	l.log(sorbetLog.LevelPanic, i...)
	panic(fmt.Sprint(i...))
}

func (l *EchoLogger) Panicj(j log.JSON) {
	l.logj(sorbetLog.LevelPanic, j)
	panic(j)
}

func (l *EchoLogger) Panicf(format string, args ...interface{}) {
	l.logf(sorbetLog.LevelPanic, format, args...)
	panic(fmt.Sprintf(format, args...))
}

func (l *EchoLogger) log(level sorbetLog.Level, args ...any) {
	var attrs []any
	var formats []any
	for _, arg := range args {
		switch arg.(type) {
		case sorbetLog.Attr:
			attrs = append(attrs, attrs)
		default:
			formats = append(formats, args)
		}
	}
	msg := ""
	if len(formats) > 0 {
		msg = fmt.Sprint(formats...)
	}
	l.l.Log(level, msg, attrs...)
}

func (l *EchoLogger) logf(level sorbetLog.Level, format string, args ...any) {
	l.l.Log(level, format, args...)
}

func (l *EchoLogger) logj(level sorbetLog.Level, j log.JSON) {
	b, err := json.Marshal(j)
	if err != nil {
		panic(err)
	}
	l.l.Log(level, string(b))
}