package utils

import (
	"os"
	"path/filepath"
	"strings"

	"github.com/natefinch/lumberjack"
	"github.com/sirupsen/logrus"
)

var Logger *logrus.Logger

func InitLogger(logDir string, levelConf string) {
	Logger = logrus.New()

	// 获取项目根目录路径
	projectRoot, err := os.Getwd()
	if err != nil {
		panic(err)
	}

	// 组合日志目录路径
	logPath := filepath.Join(projectRoot, logDir)

	// 确保日志目录存在
	if err := os.MkdirAll(logPath, 0755); err != nil {
		panic(err)
	}

	logFile := filepath.Join(logPath, "policy-service.log")

	// 配置日志切割
	lumberjackLogger := &lumberjack.Logger{
		Filename:   logFile,
		MaxSize:    100,  // 每个日志文件最大100MB
		MaxBackups: 30,   // 保留30个旧日志文件
		MaxAge:     30,   // 保留30天
		Compress:   true, // 压缩旧日志
		LocalTime:  true, // 使用本地时间切割
	}

	Logger.SetOutput(lumberjackLogger)
	Logger.SetFormatter(&logrus.JSONFormatter{})

	// 从环境变量获取日志级别，默认为info
	if levelConf == "" {
		levelConf = "info"
	}

	// 分割多个级别
	levelStrs := strings.Split(levelConf, ",")
	var levels []logrus.Level
	for _, lvlStr := range levelStrs {
		level, err := logrus.ParseLevel(strings.TrimSpace(lvlStr))
		if err != nil {
			Logger.Warnf("无效的日志级别%s，跳过", lvlStr)
			continue
		}
		levels = append(levels, level)
	}

	if len(levels) == 0 {
		levels = []logrus.Level{logrus.InfoLevel} // 默认级别
	}

}