package logger

import (
	cfg "MeterService/core/config"
	"errors"
	"io"
	"log"
	"sync"
	"time"

	rotatelogs "github.com/lestrrat-go/file-rotatelogs"
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
)

var (
	Logger   *zap.Logger
	loggerMu sync.Mutex
)

func init() {
	err := InitLogger()
	if err != nil {
		log.Println("logger初始化失败")
		panic(err)
	}
}
func InitLogger() error {
	loggerMu.Lock()
	defer loggerMu.Unlock()
	config := getConfig()
	encoder := createEncoder(config.LogType)
	logLevel := getLogLevel(config.Level)

	var cores []zapcore.Core
	switch config.FileType {
	case "level":
		debugCore := zapcore.NewCore(encoder, zapcore.AddSync(getLoggerWriter("debug", config.FileFormat)), zap.DebugLevel)
		infoCore := zapcore.NewCore(encoder, zapcore.AddSync(getLoggerWriter("info", config.FileFormat)), zap.InfoLevel)
		errorCore := zapcore.NewCore(encoder, zapcore.AddSync(getLoggerWriter("error", config.FileFormat)), zap.ErrorLevel)
		cores = append(cores, debugCore, infoCore, errorCore)
	default:
		core := zapcore.NewCore(encoder, zapcore.AddSync(getLoggerWriter("all", config.FileFormat)), logLevel)
		cores = append(cores, core)
	}

	core := zapcore.NewTee(cores...)
	newLogger := zap.New(core, zap.AddCaller(), zap.AddStacktrace(zap.WarnLevel))

	if newLogger == nil {
		return errors.New("failed to initialize logger")
	}

	Logger = newLogger
	return nil
}

func getConfig() *cfg.LoggerConfig {
	return &cfg.C.Logger
}

func createEncoder(logType string) zapcore.Encoder {
	config := zapcore.EncoderConfig{
		TimeKey:        "ts",
		LevelKey:       "level",
		MessageKey:     "msg",
		EncodeTime:     customEncodeTime,
		EncodeDuration: customEncodeDuration,
		EncodeCaller:   zapcore.ShortCallerEncoder,
	}

	if logType == "json" {
		return zapcore.NewJSONEncoder(config)
	}
	return zapcore.NewConsoleEncoder(config)
}

func getLogLevel(level string) zapcore.Level {
	var logLevel zapcore.Level
	switch level {
	case "debug":
		logLevel = zap.DebugLevel
	case "info":
		logLevel = zap.InfoLevel
	case "error":
		logLevel = zap.ErrorLevel
	default:
		logLevel = zap.InfoLevel // 默认日志级别
	}
	return logLevel
}

func getLoggerWriter(filename, fileFormat string) io.Writer {
	filePath, saveDay := "./logs", 30
	if cfg.C.Logger.FilePath != "" {
		filePath = cfg.C.Logger.FilePath
	}
	if cfg.C.Logger.MaxSaveDays > 0 {
		saveDay = cfg.C.Logger.MaxSaveDays
	}
	filename = filePath + "/" + filename
	// 日志切割
	hook, err := rotatelogs.New(
		filename+"/"+fileFormat+".log",
		//rotatelogs.WithLinkName(filename),
		rotatelogs.WithMaxAge(time.Duration(saveDay)*24*time.Hour),
		rotatelogs.WithRotationTime(24*time.Hour),
	)
	if err != nil {
		log.Printf("日志启动异常: %v\n", err)
		return nil
	}
	return hook
}

func customEncodeTime(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
	enc.AppendString(t.Format("2006-01-02 15:04:05"))
}

func customEncodeDuration(duration time.Duration, encoder zapcore.PrimitiveArrayEncoder) {
	encoder.AppendInt64(int64(duration) / 100000000) // nano -> milli
}

func Debug(format string, v ...interface{}) {
	if cfg.C.Vber.Mode == "debug" {
		if v == nil {
			Logger.Sugar().Debug(format)
		} else {
			Logger.Sugar().Debugf(format, v...)
		}
	}
}

func Info(format string, v ...interface{}) {
	if v == nil {
		Logger.Sugar().Info(format)
	} else {
		Logger.Sugar().Infof(format, v...)
	}
}

func Error(format string, v ...interface{}) {
	if v == nil {
		Logger.Sugar().Error(format)
	} else {
		Logger.Sugar().Errorf(format, v...)
	}
}