package logger

import (
	"backend/settings"
	"os"

	"github.com/natefinch/lumberjack"
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
)

var lg *zap.Logger

// Init 初始化日志
func Init(cfg *settings.LogConfig, mode string) (err error) {
	writerSyncer := getLogWriter(cfg.Filename, cfg.MaxSize, cfg.MaxBackups, cfg.MaxAge)
	encoder := getEncoder()
	var lv = new(zapcore.Level)
	err = lv.UnmarshalText([]byte(cfg.Level))
	if err != nil {
		return
	}
	var core zapcore.Core
	if mode == "dev" {
		// 开发模式，日志输出到终端
		consoleEncoder := zapcore.NewConsoleEncoder(zap.NewDevelopmentEncoderConfig())
		core = zapcore.NewTee( // 可以把日志输出到终端和文件
			zapcore.NewCore(encoder, writerSyncer, lv),
			zapcore.NewCore(consoleEncoder, zapcore.Lock(os.Stdout), zap.DebugLevel),
		)
	} else {
		core = zapcore.NewCore(encoder, writerSyncer, lv)
	}
	lg = zap.New(core, zap.AddCaller())
	zap.ReplaceGlobals(lg)
	zap.L().Info("logger init success")
	return
}

// getLogWriter 获取写入器
func getLogWriter(filename string, maxSize, maxBackup, maxAge int) zapcore.WriteSyncer {
	lumberJackLogger := &lumberjack.Logger{
		Filename:   filename,
		MaxSize:    maxSize,
		MaxBackups: maxBackup,
		MaxAge:     maxAge,
	}
	return zapcore.AddSync(lumberJackLogger)
}

// getEncoder 自定义日志格式
func getEncoder() zapcore.Encoder {
	encoderConfig := zap.NewProductionEncoderConfig()
	encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
	encoderConfig.EncodeLevel = zapcore.CapitalLevelEncoder
	encoderConfig.TimeKey = "time"
	encoderConfig.EncodeDuration = zapcore.SecondsDurationEncoder
	encoderConfig.EncodeCaller = zapcore.ShortCallerEncoder
	return zapcore.NewConsoleEncoder(encoderConfig)
}